ADVANCED FEEDERVISION 2 (AFV2) Technical ... - PBSI Group Ltd

ADVANCED FEEDERVISION 2 

(AFV2) 

Technical Manual 

P&B Engineering (UK) Ltd 

Boundary Street 

Manchester 

M12 5NG 

t +44 (0)161 230 6363 f +44 (0)161 230 6464 w www.pbeng.co.uk e mail@pbeng.co.uk 

Issue 3 9/08/2007

ADVANCED FEEDERVISION 2 TECHNICAL MANUAL 

Contents 

CONTENTS....................................................................................................................................................................I 

1. INTRODUCTION TO VISION II. ............................................................................................................. 1 

1.1. COMMON VISION II FEATURES.................................................................................................................................. 1 

2. P&B'S ADVANCED FEEDERVISION II........................................................................................................... 4 

2.1. PROTECTION FUNCTIONS........................................................................................................................................... 5 

2.2. DISPLAYABLE FEEDER DATA. ................................................................................................................................... 5 

2.3. DISPLAYABLE FEEDER STATUS. ................................................................................................................................ 5 

2.4. CONTROL FUNCTIONS. .............................................................................................................................................. 5 

2.5. CONTROL OUTPUT RELAYS....................................................................................................................................... 6 

2.6. CONTROL INPUTS. ..................................................................................................................................................... 6 

2.7. AUXILIARY SUPPLY................................................................................................................................................... 6 

3. TECHNICAL SPECIFICATION. ........................................................................................................................... 7 

3.1. POWER SUPPLY. ........................................................................................................................................................ 7 

3.2. MEASUREMENT......................................................................................................................................................... 7 

3.3. PROTECTION FUNCTIONS........................................................................................................................................... 8 

3.4. RELAY CONTACTS RATINGS...................................................................................................................................... 8 

3.5. ENVIRONMENTAL TESTS. .......................................................................................................................................... 9 

4. ADVANCED FEEDERVISION II INSTALLATION.......................................................................................... 10 

5. ADVANCED FEEDERVISION II TERMINATIONS. ....................................................................................... 11 

5.1. TERMINATION NUMBERS......................................................................................................................................... 12 

6. ADVANCED FEEDERVISION II SCHEMATIC DIAGRAM........................................................................... 15 

6.1. ADVANCED FEEDERVISION II WITH 2 POLE OPERATION. ........................................................................................ 15 

6.2. FEEDERVISION II WITH 3 POLE OPERATION. ........................................................................................................... 16 

7. ADVANCED FEEDERVISION II ANALOGUE INPUTS.................................................................................. 17 

7.1. POWER SUPPLY LIVE............................................................................................................................................... 17 

7.2. VOLTAGE REFERENCE............................................................................................................................................. 17 

7.3. CURRENT SENSOR INPUTS....................................................................................................................................... 17 

7.3.1. Overcurrent Poles. ......................................................................................................................................... 17 

8. ADVANCED FEEDERVISION II CONTROL OUTPUTS. ............................................................................... 18 

8.1. OUTPUT RELAYS. .................................................................................................................................................... 18 

9. ADVANCED FEEDERVISION II CONTROL INPUTS. ................................................................................... 19 

10. TRIP CIRCUIT SUPERVISION......................................................................................................................... 27 

11. ADVANCED FEEDERVISION II SERIAL PORT ........................................................................................... 28 

12. ADVANCED FEEDERVISION II FACEPLATE FUNCTIONS...................................................................... 29 

12.1. LED STATUS......................................................................................................................................................... 29 

13. GRAPHICAL DISPLAY. ..................................................................................................................................... 30 

13.1. MENU SCREENS. ................................................................................................................................................... 30 

13.1.1. Data Menu.................................................................................................................................................... 31 

13.1.1.1. Measured Values.................................................................................................................................................... 31 

13.1.1.1.1. Digital Values. ................................................................................................................................... 31 

13.1.1.1.2. Analogue Values. ............................................................................................................................. 32 

13.1.1.2. Stats......................................................................................................................................................................... 32 

13.1.1.3. Fault Data............................................................................................................................................................... 32 

13.1.1.3.1. Active Fault......................................................................................................................................... 33 

Page No. ii Issue 3 9/8/2007 P&B Engineering

ADVANCED FEEDERVISION II TECHNICAL MANUAL 

13.1.1.3.2. Last Fault. .............................................................................................................................................33 

13.1.1.3.2.1. Last Trip. ...................................................................................................................................33 

13.1.1.3.2.2. Last Alarm. ...............................................................................................................................34 

13.1.1.3.3. Fault History. ......................................................................................................................................34 

13.1.1.3.3.1. Trip History. ............................................................................................................................34 

13.1.1.3.3.2. Alarm History. ........................................................................................................................34 

13.1.2. Breaker Control. ...........................................................................................................................................35 

13.1.3. Setting Menu. ................................................................................................................................................35 

13.1.3.1. Control Settings......................................................................................................................................................36 

13.1.3.1.3. Relay Settings.....................................................................................................................................37 

13.1.3.1.A Value Change Screen......................................................................................................................37 

13.1.3.2. Protection Settings..................................................................................................................................................38 

13.1.3.2.1. Function Screen.................................................................................................................................38 

13.1.3.3. System Settings. ......................................................................................................................................................40 

13.1.3.3.1. Feeder Settings...................................................................................................................................41 

13.1.3.3.2. Serial Settings.....................................................................................................................................42 

13.1.3.3.3. Unit Settings........................................................................................................................................42 

13.1.3.3.3.1. Customise Strings .........................................................................................................................43 

13.2. MENU TREE STRUCTURE.......................................................................................................................................44 

14. SETTING PAGES SUMMARY. ..........................................................................................................................45 

14.1. SERIAL SETTING.....................................................................................................................................................48 

14.2 FEEDER SETTINGS...................................................................................................................................................49 

14.3 DIGITAL INPUT SETTINGS........................................................................................................................................52 

14.4. RELAY OUTPUT SETTINGS. ....................................................................................................................................54 

14.5. PROTECTION SETTINGS ..........................................................................................................................................56 

14.5.1. Protection Features. .....................................................................................................................................56 

14.5.2. Protection Functions.....................................................................................................................................59 

14.5. UNIT SETTINGS. .....................................................................................................................................................71 

15. LONG TIME INVERSE OVERCURRENT RELAY. .......................................................................................73 

15.1 INVERSE TIME PHASE OVERCURRENT RELAY. .......................................................................................................73 

15.2. INVERSE TIME CHARACTERISTICS. ........................................................................................................................74 

16. AUTO TRANSFER SCHEME. ............................................................................................................................75 

16.1. AUTO TRANSFER SCHEME. ....................................................................................................................................75 

16.2. AUTO TRANSFER SCHEME USING ADVANCED FEEDERVISION II RELAYS. .............................................................75 

16.3 INCOMER 1 PROTECTION, POSITION AFV1. ............................................................................................................75 

16.4. INCOMER 2 PROTECTION, POSITION AFV3. ...........................................................................................................75 

16.5. BUS COUPLER PROTECTION, POSITION AFV2........................................................................................................77 

16.6 BUS COUPLER CONTROLLER, POSITION AFV4. ......................................................................................................77 

16.7. SCHEME OPERATION. .............................................................................................................................................77 

P&B Engineering Issue 3 9/08/2007 Page iii


1. Introduction To Vision II. 

The P&B Vision II series builds upon the success of the original Vision series. It is a new 

generation of Intelligent Protection Controllers, which now offers a greater combination of power, 

flexibility and ease of use. 

The Vision II relay is a totally integrated device intended to provide all monitoring, protection & 

control function normally provided on a vacuum, air circuit breaker or starter device by separate 

expensive components such as protection relays, meters, lamps, push buttons etc. 

The Vision II series will comprise of: 

• Motorvision II. 

• Advanced Motorvision II. 

• Feedervision II. 

• Feedervision II With Trip Circuit Supervision. 

• Advanced Feedervision II. 

At the core of the Vision II series is the hardware and software design. Major advances by P&B in 

the design of electronic circuits and the use of surface mount printed circuit board technology 

have produced an extremely compact unit smaller than all known similar devices available today. 

This, combined with a totally modular hardware and software design, gives the product the 

flexibility to expand and adapt to suit any protection controller application. 

1.1. Common Vision II Features. 

DIN Standard, Compact Case. 

Vision II is supplied in an internationally recognised DIN size cases measuring only 144 x 96 x 

129mm (196 x 96 x 129mm for the Feedervision II, Feedervision With TCS II, Advanced 

Feedervision II and Advanced Motorvision II). The case is supplied for flush mounting with 

standard option of a dustproof-hinged cover with key lock etc. The Vision II series can be 

installed into some of the smallest Low Voltage compartments available allowing high stacking 

density per tier. 

Graphical LCD Display. 

Dominating the front facia of the Vision II is a 50mm x 50mm backlit graphical liquid crystal 

display. Vision II is the first Protection Controller supplied at a market competitive cost to use this 

type of LCD display technology. 

The display gives a resolution of 128 x 128 pixels, this allows up to 16 lines of 21 text characters 

to be displayed at the same time eliminating the need for confusing abbreviations and the need to 

constantly select different pages of data, as is often the case with devices using limited character 

displays. 

P&B Engineering Issue 3 9/08/2007 Page 1


The use of the graphics capability is further expanded by Vision II for instance when a motor 

starts the Vision II will automatically display an accurate trend of the time versus current 

characteristic which can be recalled later. The operator will instantly understand the curve and 

should be able to tell at a glance if the starting characteristic is normal as Vision II can also 

display a memorised characteristic from a previous start. 

The graphic display also allows Vision II to need only 4 function buttons as opposed to 10 or more 

on most similar devices. This results in a user friendly interface which is achieved by the present 

function of each button always being displayed which enables the 4 buttons to allow full 

interrogation and operation of the unit by untrained personnel. 

The use of this display is fundamental to P&B’s design philosophy, which is to provide powerful 

comprehensive products that can easily be used by operators without the need for specific training. 

The facility to display up to 16 lines of 21 characters allows comprehensive and fully descriptive 

help to be provided through a powerful learn mode, which takes the user through the display 

system. 

Terminations. 

Terminals are located on the rear of the rear of unit and are supplied with industry standard plugin 

blocks to allow easy installation and removal. The terminals are suitable for connecting up to 

1.5 sq. mm crimped conductors. The current inputs to the relay are screw terminals - as opposed to 

the plug-in blocks that are used for the other terminals. 

Control Inputs. 

Vision II includes 24 optically isolated digital input channels, which are programmable to provide 

comprehensive monitoring of the control circuit status and interfacing with all necessary items of 

external equipment. 

Control Outputs 

Vision II includes 8 control outputs to allow sequenced control of contactors, circuit breakers and 

remote indication of the units status etc. Five out of the eight relays are fully programmable. 

Analogue Inputs. 

Transformer isolated inputs are included to allow Vision II to monitor 3 phase current, earth 

current, standby earth current, voltage, (3 phase for Feedervision II, Feedervision II With TCS and 

Advanced Feedervision II). 

Page No. 2 Issue 3 9/08/2007 P&B Engineering


Analogue Outputs. 

To allow Vision II to output special variables such as speed control to a variable speed drive an 

optically isolated 4 - 20mA output is provided as an optional extra, which can be adjusted using 

either the display or serial communications. 

Protection. 

By monitoring the measured inputs Vision II provides highly accurate and flexible protection. 

Protection functionality for the Vision II Range use existing and field proven software and 

hardware design from the established and proven P&B MR series of Digital Protection relays. 

Self Supervision. 

For security Vision II includes comprehensive hardware and software watchdog self supervision 

routines offering the user the comfort that should any problem occur which effects the operation 

of the unit an Alarm will be raised and detailed error codes given to assist rapid rectification. 

Security. 

To prevent un-authorised tampering with settings or un-authorised control of a circuit separate 

password restrictions are applied to allow operators to restrict operations allowed. 

RS485 Serial Communications. 

The Vision II series includes a RS485 serial port to allow up to 32 Vision II units to be connected 

together in a daisy chain or multi-drop configuration. The system can be supplied with a Slave 

Modbus RTU protocol which will allow the units to interface directly with all major Distributed 

Control and PLC systems. The relay is also available with P&B’s own protocol which will allow 

Vision II units to be connected to the established XXCell Data Concentrator system where larger 

Distributed Communication Systems or Intelligent Dual Redundancy may be required. 

Either protocol allows access to all measured and calculated data as well as allowing the control 

system to monitor status or control circuits using only the twisted pair serial communication paths. 

Full details of the P&B XCell Data Concentration system and protocol details are available 

from P&B on request. 



2. P&B's Advanced Feedervision II 

The P&B's Advanced Feedervision II is a highly sophisticated microprocessor based feeder 

protection and control unit, designed specifically for use on low or medium voltage feeders as an 

integral part of any type or manufacture of distribution equipment. All of the latest features are 

included in the Advanced Feedervision II to allow total control, protection and monitoring of 

distribution feeders either by direct hard wire inputs or via the RS485 serial port. 

Advanced Feedervision II can be used to control air circuit breakers, vacuum circuit breakers and 

contactors and true RMS current sampling at 0.5msec intervals enables the unit to be used in 

conditions where the measured current has a high harmonic content. 

Advanced Feedervision II monitors current and voltage inputs to provide a comprehensive feeder 

protection package. This is combined with all the necessary control and monitoring functions and 

a high-speed communications facility. The unit is a small, easily installed package supplied at a 

very competitive cost, which makes the Advanced Feedervision II the most attractive Feeder 

Protection and Control device available today. 

All hard-wired control inputs are connected to the device via optically isolated inputs to enable all 

opening, closing and tripping commands to be carried out by the unit. Status of all individual 

hard-wired contacts is also provided both locally via the liquid crystal display and remotely via the 

RS485 communications port. 

All Setting parameters are programmed independently for each unit via the integral keypad and 

liquid crystal display on the front plate or via the RS485 communications port and the IBM PC 

based software package available for the Vision II series of products. 

During operational conditions the LCD also gives access to accurate load, statistical and fault data 

such as; Volts, Phase Amps, Time to Trip, In Service Hours, Number of operations. 

Large Light Emitting Diodes mounted on the front plate give visual indication of the breaker 

status i.e. OPEN/CLOSED/TRIPPED and ALARM/TRIP/HEALTHY conditions etc. 

Flexible high speed control via PLC or DCS systems is obtained through the Advanced 

Feedervision II’s RS485 communications port, allowing computer access to full control and 

monitoring of feeder data, including: measured data, statistical data and control input status. 



2.1. Protection Functions. 

Undervoltage Protection. 

Over-voltage Protection. 

Earth Fault Protection. 

(Low Set and High Set) 

Load Increase Protection. 

High Set or Instantaneous Overcurrent 

Protection. 

Low Set Overcurrent Protection 

(Short Time delay). 

Short Circuit Protection. 

Synchronisation Protection. 

Breaker Fail Protection. 

Local/Remote Protection. 

External Relay Protection. 

Inverse Time Overcurrent Protection 

(Variable Characteristic). 

Long Time Inverse Overcurrent Protection. 

Check Synchronising For Automatic Transfer. 

Oil and Winding Temperature Protection. 

Trip Circuit Protection. 

Line Voltage Protection. 

Internal Error Protection. 

Busbar Protection. 

Auto Manual Protection. 

Auto Changeover Protection. 

2.2. Displayable Feeder Data. 

Phase Amps. 

Earth Fault Amps. 

Standby Earth Fault Amps. 

Phase Volts. 

Phase Power kW. 

Phase Power Factor. 

Phase KiloWatt Hours. 

Phase KiloWatt Peak Demand. 

Voltage Synchronisation. 

Angle of Difference. 

Total Hours in Service. 

Hours Since Closure. 

No. of Operations. 

Pre-Trip and Alarm Voltages and Currents. 

Time to Trip. 

2.3. Displayable Feeder Status. 

Open/Closed/Tripped. 

Alarm - Description. 

Trip Description - Pre- Trip Values. 

Auto/Manual Mode. 

2.4. Control Functions. 

Open 

Close 

Reset 

Auto Transfer 



2.5. Control Output Relays. 

Close. Programmable Relay #1. 

Trip. Programmable Relay #2. 

Serial. Programmable Relay #3. 

Auto, Manual. Programmable Relay #4. 

Trip IC1, Trip IC2. Programmable Relay #5. 

Auto Alarm. Programmable Relay #6. 

Close IC1 Programmable Relay #7. 

The output relays can be programmed as follows: - 

Warn 1,Warn 2, Alarm, Indication 1, Indication 2, Indication 3, Indication 4 

Indication 5, Alarm Fail Safe, Trip Fail Safe, Indicator 1 Fail Safe, Indicator 2 Fail Safe, 

Indicator 3 Fail Safe, Indicator 4 Fail Safe, Indicator 5 Fail Safe, DCS Available 

2.6. Control Inputs. 

TNC Trip 

Circuit Breaker On IC1 & IC2 

TNC Close Active In Local 

Trip Circuit 

Local/Remote 

BC Close Permitted 

Emergency Transformer 

AC Bus A 

Incomer 1 & 2 Service 

AC Bus B 

Buscoupler Service 

Buscoupler In Service 

Incomer 1&2 State 

Circuit Breaker On Buscoupler 

Buscoupler State 

Remote Trip 

MREF External 

Remote Close 

Transformer Buchholz IC1 & IC2 

Auto/Manual 

Transformer Oil Temp IC1 & IC2 

AFV 2 Permissive 

Transformer Winding IC1 & IC2 Bus Voltage A >80% 

Transformer Pressure IC1 & IC2 Bus Voltage A


3. Technical Specification. 

3.1. Power Supply. 

Auxiliary Power Supply 

AC Nominal 

Frequency 

Maximum Power Consumption 

Range 80 - 265V AC 

110V DC ± 20V 

45 - 65 Hz 

10VA, 15VA Nominal 

3.2. Measurement. 

Phase Current Measurement 

Method 

True RMS, Sample time


3.3. Protection Functions. 

Overload Alarm and Trip Curves 

Fault Time Accuracy 

± 200mS up to 10 seconds 

± 2% of trip time over 10 seconds 

Threshold Current Level Overload Setting ± 2% 

Current Unbalance Alarm and Trip 

Method Unbalance = 100 x (Imax - Imin) / Ir % 

Where Imax = max. of 3 phase currents 

Imin = min. of 3 phase currents 

Ir = Larger of Imax or Motor FLC 

Alarm Threshold Unbalance Level 50% of Unbalance current ± 2% 

Alarm Fixed Time Delay Accuracy 1.0 ± 0.5 seconds 

Trip Threshold Unbalance Level Unbalance Current Setting ± 2% 

Trip Time Accuracy 

Overcurrent Trip Curves 

Fault Time Accuracy 

± 1 second up to 10 seconds 

± 1 second +/- 2% above 10 sec. 

± 20mS up to 0.5 seconds 

± 3% of trip time over 0.5 seconds 

Pickup Level Overload Setting ± 2% 

Earth Fault Time Delay 

Earth Fault Trip 

0.1 to +0.2 sec. for less than 1 second delay 

Total Run Time Accuracy ± 2% 

Time Delays 

Accuracy 

± 0.5 seconds or ± 2% of time 

Exceptions 

Earth Fault Trip 

+150mS,-0.0@ 1.1 x setting 

+60mS,-0.0@ 2 x setting 

+40mS,-0.0@ 5 x setting 

Total Run Time Accuracy ± 2% 

3.4. Relay Contacts Ratings. 

Output Relays 

Rated Load 

Maximum Operating Voltage 

Max Making Current 1.2A 

Max Breaking Current 

100-200mA 

10A @ 125V AC / 250V AC 

7A @ 30V DC 

280V AC 



3.5. Environmental Tests. 

CLIMATIC Test standard Severity level 

Temperature Dry Cold Operational IEC 68-2-1 -20 deg C ,96 hrs 

Temperature Dry Cold 

Transportation & Storage 

IEC 68-2-1 

-40 deg C , 96hrs 

Temperature Dry Heat 

Operational 

Temperature Dry Heat 

Transportation & Storage 

IEC 68-2-2 

IEC 68-2-2 

+60 deg C , 96 hrs 

+85 deg C , 96 hrs 

Damp Heat 

IEC 68-2-3 

93% @ +40 deg C , 56 days 

Steady State 

Enclosure IEC 529 front IP52 , rear IP00 

MECHANICAL 

Vibration IEC255-21-1 Class I 

Shock & Bump IEC255-21-1 Class I 

Seismic IEC255-21-1 Class I 

ELECTRICAL 

Insulation resistance IEC 255-5 500 Vdc , 5 secs 

DC & AC Supply Voltage IEC 255-6 Voltage range, upper & lower limit continuous withstand , ramp up & 

down over 1 minute 

Voltage Dips , Short Interruptions 

& Voltage variations immunity 

IEC255-11 

IEC 1000-4-11 

3 dips & 3 interruptions at 10 sec intervals of duration between 10mS and 

500mS at zero crossings. Variations 40% &70% 

Ripple in dc supply 

12% ac ripple 

Dielectric Test IEC 255-5 Series C of table 1 

2.5 kV 50Hz , 1 min 

1.0 kV open contacts , 1 min 

High Voltage Impulse IEC 255-5 5 kV peak 1.2/50uS,0.5J 

3 pos , 3 neg 

VT input Thermal Withstand 

120% Vn , continuous 

CT input Thermal Withstand 250xIn half wave,100xIn for 1 second 30 xIn for 10 second , 4 xIn 

cont. 

ELECTROMAGNETIC 

COMPATIBILITY 

Electrical fast Transient/Burst IEC 255-22-4 

IEC 1000-4-4 

Oscillatory Waves 

1 Mhz Burst 

IEC 255-22-1 

Class IV-4.0kv Power supply 

Class III -2.0 kV Other inputs 

1 min each polarity 

Class III 

longitudinal 2.5 kV , 2sec 

transverse 1.0 kV , 2 sec 

Electrostatic Discharge IEC 255-22-2 Class III 

8 kV contact 15kV air discharge , 10 discharges at 1 sec intervals 

Conducted Disturbance 

RF fields 

IEC 1000-4-6 

0.15 to 80 Mhz 

Severity Level 10Vrms 

+sweeps 0.05-0.15MHz & 80-100MHz 

Radiated e-m field 

from digital portable telephones 

ENV 50204 

900 & 1890mhz at 10V/m 

Radiated RF e-m field immunity 

test 

IEC 255-22-3 

ClassIII test method A 

+sweep 500-1000mhz 

or IEC 1000-4-3 80-1000mhz 

severity 10V/m 80% modulated 1 kHz 

Surge Immunity IEC 1000-4-5 4kV common mode 

2kV differential mode , 1.2/50uS 

Power Frequency Magnetic Field IEC 1000-4-8 1000A/m for 1 sec 

100A/m for 1 minute 

Power Frequency Interference on 

communications circuits 

EA PAP Appendix 

A(i) 

Power Frequency interference on 

other circuits except 50 Hz inputs 

EA PAP Appendix 

A(ii) 

Pulse Magnetic Field IEC 1000-4-9 6.4/16uS , 1000A/m 

Damped Oscillatory Magnetic Field 

Immunity 

IEC 1000-4-10 0.1 & 1.0 Mhz , 100A/m 

Conducted & Radiated RF 

Interference Emission 

Power frequency conducted 

immunity, common mode 

EN55022 or 

EN55011or 

EN50081-2 

IEC 61000-4-16 

IEC 60255-22-7 

Class A interference limits 

DC to 150kHz sweep test level 4 

300V at 16 2/3 & 50/60Hz 



4. Advanced Feedervision II Installation. 

The Advanced Feedervision II is supplied in a DIN standard case suitable for flush mounting as 

detailed below. 

The case can be supplied with an optional dustproof cover, which can also be key lockable. 



5. Advanced Feedervision 2 Terminations. 

All external connections are made using Phoenix type clamp type terminals grouped in plug in 

sections to allow pre-wiring to be carried out prior to fitting into the motor starter cubicle. These 

are suitable for accepting 1.5sq mm wire. The diagram below shows the position of the terminals 

as viewed from the rear of the relay. 



5.1. Termination Numbers. 

The following details the specific use of the terminals 

Smart Card 

Power Supply Card 

CONNECTOR 1 

3-WAY AUX. SUPPLY INPUT 

SMART Card Socket 

PIN NUMBER. 

SIGNAL. 

31 LIVE 

32 NEUTRAL 

Digital Input Card 

33 EARTH 

3-WAY AUX. SUPPLY 

PIN NUMBER 

SIGNAL. 

1 NEUTRAL 

Analogue Card 

2 NEUTRAL 

2-WAY VOLTAGE REFERENCE 

L CONTROL LIVE PIN NUMBER. SIGNAL. 

12-WAY PLANT INPUTS 

34 LIVE 

PIN NUMBER. SIGNAL. 35 NEUTRAL 

3 PROGRAMMABLE INPUT 1 

3-WAY RS 485 COMMUNICATION 

4 PROGRAMMABLE INPUT 2 PIN NUMBER. SIGNAL 

5 PROGRAMMABLE INPUT 3 SC RS485 Screen 

6 PROGRAMMABLE INPUT 4 36 RS485 TX+ 

7 PROGRAMMABLE INPUT 5 37 RS485 TX- 


10-WAY CURRENT SENSOR I/P 

9 PROGRAMMABLE INPUT 7 PIN NUMBER. SIGNAL. 

10 PROGRAMMABLE INPUT 8 40 CURRENT SENSOR 




1A/2A/5A CT Card 


8-WAY CT INPUT 

PIN NUMBER. 

SIGNAL. 

41 I0 S1 

3-Phase VT Card 

42 I0 S2 

2-WAY VT INPUT 

43 I1 S1 

PIN NUMBER SIGNAL. 44 I1 S2 

60 +ve 45 I2 S1 

61 -ve 46 I2 S2 


47 I3 S1 

PIN NUMBER SIGNAL. 48 I3 S2 

62 +ve 

8-WAY CT SIGNAL 

63 -ve PIN NUMBER. SIGNAL. 


49 CT SIGNAL 

PIN NUMBER 

SIGNAL. 

64 +ve 

65 -ve 

Relay Card 

2-WAY 4-20mA INPUT (OPTION) 

PIN NUMBER 

SIGANL 

Trip Circuit Supervision Card 

2-WAY TCS INPUT 1 

PIN NUMBER 

SIGNAL 

50 TCS 1 +ve 

51 TCS 1 -ve 

2-WAY TCS INPUT 2 

15 +ve PIN NUMBER SIGNAL 

16 -ve 52 TCS 2 +ve 

12-WAY RELAY OUTPUT 

53 TCS 2 -ve 

PIN NUMBER. 

SIGNAL. 

12-WAY TCS Output 

19 RELAY 4 NO PIN NUMBER SIGNAL 

20 RELAY 4 C 54 RELAY 1 C 

21 RELAY 4 NC 55 RELAY 1 NC 

22 RELAY 3 NO 56 RELAY 1 NO 

23 RELAY 3 C 57 RELAY 2 C 

24 RELAY 3 NC 58 RELAY 2 NC 

25 RELAY 2 NO 59 RELAY 2 NO 

26 RELAY 2 C 

27 RELAY 2 NC 

28 RELAY 1 NO 

29 RELAY 1 C 

30 RELAY 1 NC 



Digital Input Card 

3-WAY AUX. SUPPLY 

Relay Card 

12-WAY RELAY Output 

PIN NUMBER SIGNAL. PIN NUMBER. SIGNAL. 

118 NEUTRAL 132 RELAY 8 NO 

119 NEUTRAL 133 RELAY 8 C 

L CONTROL LIVE 134 RELAY 8 NC 

12-WAY PLANT INPUTS 

135 RELAY 7 NO 

PIN NUMBER. SIGNAL. 136 RELAY 7 C 

120 PROGRAMMABLE INPUT 13 137 RELAY 7 NC 

121 PROGRAMMABLE INPUT 14 138 RELAY 6 NO 

122 PROGRAMMABLE INPUT 15 139 RELAY 6 C 


124 PROGRAMMABLE INPUT 17 141 RELAY 5 NO 

125 PROGRAMMABLE INPUT 18 142 RELAY 5 C 









6. Advanced Feedervision II Schematic Diagram 

6.1. Advanced Feedervision II With 2 Pole Operation. 

The following diagram shows the connection diagram of the Advanced Feedervision II unit in 

conjunction with the current transformers. The current input is in the operation of 2 Phase and 2 

Earth Fault Inputs. 

BLUE PHASE 

YELLOW PHASE 

RED PHASE 

110/240V AC 

L 

N 

SEPERATE AUX. SUPPLY 

FOR DIGITAL INPUTS 

TO CORE 

BALANCE CTs 

Alternative 

N 

15 16 

L 

1 2 

L 

86 87 88 89 82 83 

84 85 

55 56 57 58 59 60 

Earthing 

76 77 73 74 75 

S1 S2 S1 S2 S1 S2 

S1 S2 

GND 

V0 

INPUT 1 

INPUT 2 

17 

18 

I1 I2 Ie Istby 

PHASE CURRENTS E/F CURRENT STANDBY 

EARTH PHASE 

V1 V2 V3 

PHASE VOLTAGES 

SYNCHRONISING 

VOLTAGE INPUT 

INPUT 3 

19 

42 

44 

INPUT 4 

INPUT 5 

20 

21 

ON 

INTERNAL 

POWER 

SUPPLY 

RELAY 1 

43 

39 

INPUT 6 

22 

LOGIC SUPPLY 

ALT. AUX POWER SUPPLY 

41 

RELAY 2 

40 

INPUT 7 

23 

36 

38 

RELAY 3 

INPUT 8 

24 

37 

INPUT 9 

25 

33 

35 

RELAY 4 

INPUT 10 

26 

34 

INPUT 11 

INPUT 12 

INPUT 13 

27 

28 

3 

ADVANCED 

FEEDERVISION 

70 

72 

RELAY 5 

74 

67 

69 

INPUT 14 

4 

RELAY 6 

68 

INPUT 15 

5 

INPUT 16 

6 

64 

66 

INPUT 17 

7 

RELAY 7 

65 

INPUT 18 

8 

61 

63 

RELAY 8 

INPUT 19 

9 

62 

N 

INPUT 20 

10 

51 

50 

TCS RELAY 1 

INPUT 21 

11 

49 

INPUT 22 

12 

54 

53 

TCS RELAY 2 

INPUT 23 

13 

52 

45 

TCS 1 46 

INPUT 24 

14 

80 89 

RS485 SERIAL PORT 

(+) (-) SCREEN 

78 79 SC 

47 

TCS 2 48 

4-20mA Output 

-ve +ve 

29 30 

CABLE SUPPLIED WITH RELAY 



6.2. Feedervision II With 3 Pole Operation. 

The following diagram shows the connection diagram of the Advanced Feedervision II unit in 

conjunction with the current transformers. The current input is in the operation of 3 Phase and 1 

Earth Fault Input. 

BLUE PHASE 

YELLOW PHASE 

RED PHASE 

SEPERATE AUX. SUPPLY 

FOR DIGITAL INPUTS 

110/240V AC 

L 

N 

Alternative 

N 

15 16 

L 

1 2 

L 

84 85 86 87 88 89 

82 83 

55 56 57 58 59 60 

Earthing 

76 77 73 74 75 

S1 

S2 S1 S2 S1 S2 

S1 S2 

GND 

V0 

INPUT 1 

INPUT 2 

17 

18 

I3 I1 I2 Ie 

PHASE CURRENTS E/F CURRENT 

PHASE VOLTAGES 

SYNCHRONISING 

VOLTAGE INPUT 

V1 V2 V3 

INPUT 3 

19 

42 

44 

INPUT 4 

INPUT 5 

20 

21 

ON 

INTERNAL 

POWER 

SUPPLY 

RELAY 1 

43 

39 

INPUT 6 

22 

LOGIC SUPPLY 

ALT. AUX POWER SUPPLY 

41 

RELAY 2 

40 

INPUT 7 

23 

36 

38 

RELAY 3 

INPUT 8 

24 

37 

INPUT 9 

25 

33 

35 

RELAY 4 

INPUT 10 

26 

34 

INPUT 11 

INPUT 12 

INPUT 13 

27 

28 

3 



70 

72 

RELAY 5 

74 

67 

69 

INPUT 14 

4 

RELAY 6 

68 

INPUT 15 

5 

INPUT 16 

6 

64 

66 

INPUT 17 

7 

RELAY 7 

65 

INPUT 18 

8 

61 

63 

RELAY 8 

INPUT 19 

9 

62 

N 

INPUT 20 

10 

51 

50 

TCS RELAY 1 

INPUT 21 

11 

49 

INPUT 22 

12 

54 

53 

TCS RELAY 2 

INPUT 23 

13 

52 

45 

TCS 1 46 

INPUT 24 

14 

80 89 

RS485 SERIAL PORT 

(+) (-) SCREEN 

TCS 2 

4-20mA Output 

-ve +ve 

47 

48 

78 79 

SC 

29 

30 

CABLE SUPPLIED WITH RELAY 



7. Advanced Feedervision II Analogue Inputs. 

7.1. Power Supply Live. 

The Advanced Feedervision II requires 110V DC, 220V DC, 240V AC or 110V AC to supply the 

unit and provides the selected AC voltage to all external inputs. The voltage required should be 

specified when ordered. 

7.2. Voltage Reference. 

The Advanced Feedervision II monitors three phase voltage which can be directly connected for 

voltages up to 415V. Through the use of Voltage Transformers the unit can measure line voltage 

upto 33kV. 

7.3. Current Sensor Inputs. 

The Advanced Feedervision II allows connection of standard 1 amp or 5 amp secondary current 

transformers. The current transformers are connected via terminal block 19 and terminal block 20 

is then linked to connector block 18 via a ribbon cable, supplied with the unit. 

7.3.1. Overcurrent Poles. 

The Advanced Feedervision II allows the connection of either of the following: 

Two Phase Current and Two Earth Fault Phases 

Three Phases Current and One Earth Fault Phase. 

In the case of Two Earth Fault Phases the currents in Phase I1 and I2 are measured from the RED 

and YELLOW phase. I3 is calculated from the readings of I1 and I2. (I3 is the NEGATIVE 

VECTOR SUM of I1 and I2). This is to allow the connection of Earth Phase Currents, Istby and 

Ie. 

With the use of Three Phase Currents one of the Earth Fault Phases is lost. 

The number of Overcurrent Poles can be set by the user. 



8. Advanced Feedervision II Control Outputs. 

8.1. Output Relays. 

The Advanced Feedervision II has 8 output relays, which can be assigned as follows, depending 

on what the position of the relay is set to: 

OUTPUT 

RELAY 

NUMBER 

OUTPUT 

WHEN SET 

TO AFV1 

OUTPUT 

WHEN SET 

TO AFV2 

OUTPUT 

WHEN SET 

TO AFV3 

OUTPUT 

WHEN SET TO 

AFV4 

OUTPUT 

WHEN SET 

TO AFV5 

1 CLOSE TRIP CLOSE CLOSE CLOSE IC1 

2 TRIP Programmable TRIP TRIP TRIP IC1 

3 SERIAL Programmable SERIAL AUTO TRIP IC2 

4 Programmable Programmable Programmable TRIP IC1 ALARM 

5 Programmable Programmable Programmable SERIAL NOT USED 

6 Programmable Programmable Programmable TRIP IC2 NOT USED 

7 Programmable Programmable Programmable MANUAL (See Note ■) 

8 Programmable Programmable Programmable AUTO ALARM ALARM 

■ When AFV5 is set to scheme SW256910 relay O/P is NOT USED 

When AFV5 is set to scheme SW258810 relay O/P is TRSF2 ALARM 

Programmable output relays can be programmed with the following options: - 

1. Not Used. 10. Alarm FS. 

2. Warn 1. 11. Trip FS. 

3. Warn 2. 12. Indicator 1FS 

4. Alarm. 13. Indicator 2FS 

5. Indicator 1. 14. Indicator 3FS 



8. Indicator 4. 17. DCS Available 

9. Indicator 5. 

See Section 14.4. For more details 



9. Advanced Feedervision II Control Inputs. 

The Advanced Feedervision II has 24 inputs to provide full control and indication for the breaker. 

The live side of each input is commoned to enable simplified wiring to the unit. However it 

should be noted that the common terminals are always live when power is connected to the 

Advanced Feedervision II and they should always be isolated prior to working on the wiring at the 

rear of the unit. 

The condition of all these inputs can be viewed at any time via the Digital Inputs page, which 

enables complete wire checking without the need to disconnect or even gain access to wiring. 

The inputs that will be used by the Advanced Feedervision II are chosen by the relay when the 

user chooses the position of the relay, in the Auto Transfer Scheme. Depending upon the position 

there might be as little as 13 digital inputs. 

TNC Trip. 

This input is an external trip input from the Local Control Panel to the relay telling it to trip. The 

command can originate from another relay or a switch. When the signal is received the relay will 

trip and open the circuit breaker. (Open = Neutral, Close = Trip). 

TNC Close Active In Local. 

This input is an external input from the Local Control Panel to the relay to close the circuit 

breaker associated with the relay. The input can originate from another relay or a switch. When 

the signal is received the relay will close the circuit breaker. (Open = Neutral, Close = Close). 

Local. 

This contact allows control of the Advanced Feedervision II and the circuit breaker to be 

controlled via local control (via Remote Close Terminals). It is also only possible to reset the 

Advanced Feedervision II after a fault from the front panel without authorisation if the Advanced 

Feedervision II is in the Local control mode. (Open = Neutral, Close = Local). 

Remote. 

This contact allows control of the Advanced Feedervision II and the circuit breaker to be 

controlled via remote control either via the direct wired PLC inputs or via the RS485 serial link. 

This input is mutually exclusive to the Local input mentioned above. They should not be in the 

same state of open or close, if the Local input is closed then the Remote input must be open and 

vice versa. If they are in the same state a trip or alarm is called depending upon the setting of the 

Local/Remote Protection Function (Number 14) see section 14.5.2. (Open = Neutral, Close = 

Remote). 



Emergency Transformer Incomer 1. 

This input is connected to an external relay associated with Incomer 1 and it indicates the trip 

status of that relay. This external relay is the same as the one mentioned above. (Open = Healthy, 

Closed = Tripped). 

Emergency Transformer Incomer 2. 

This input is connected to an external relay associated with Incomer 2 and it indicates the trip 

status of that relay. This external relay is the same as the one mentioned above. (Open = Healthy, 

Closed = Tripped). 

Incomer 1 Service. 

This input is connected to Incomer 1 Circuit Breaker and indicates whether it is in the service (in 

use) or test position (where the circuit breaker is taken off the busbars and out of the circuit). 

(Open = Test, Closed = Service). 

Incomer 2 Service. 




Buscoupler Service. 

This input is connected to Bus Coupler Circuit Breaker and indicates whether it is in the service 

(in use) or test position (where the circuit breaker is taken off the busbars and out of the circuit). 


Incomer 1 State. 

This is connected to Incomer 1 Circuit Breaker and indicates whether it is on (closed-allowing 

current to flow) or off (open-no current flowing). (Open = Off, Closed = On). 

Incomer 2 State. 



Buscoupler State. 

This is connected to the Bus Coupler Circuit Breaker and indicates whether the circuit breaker is 

on (closed-allowing current to flow) or off (open-no current flowing). (Open = Off, Closed = On). 



MREF External Incomer 1. 

This input is connected to a MREF relay associated with Incomer 1 and it indicates the trip status 

of that relay. This external relay offers Restricted Earth Fault protection, which is then integrated 

with the Advanced Feedervision II. When there is an Earth Fault the MREF relay will trip the HT 

Breaker on Incomer 1 and then, through the Advanced Feedervision II, will intertrip the LT 

Breaker on Incomer 1. (Open = Healthy, Closed = Trip). 

MREF External Incomer 2. 

This input is connected to a MREF relay associated with Incomer 2 and it indicates the trip status 

of that relay. This external relay is the same as the one mentioned above. 

(Open = Healthy, Closed = Trip). 

Transformer Buchholz Incomer 1. 

This input is connected to a Buchholz Relay associated with the Transformer on Incomer 1 and 

indicates the trip status of that relay. This external relay protects the Transformer from internal 

faults. It protects against simple faults such as shorted turns (by checking for gassing of the oil) 

and severe faults such as short circuits (by checking for a surge of oil). 


Transformer Buchholz Incomer 2. 

This input is connected to a Buchholz Relay associated with the Transformer on Incomer 2 and 

indicates the trip status of that relay. This external relay is the same as the one mentioned above. 


Transformer Oil Temperature Incomer 1. 

This input is connected to an Oil Temperature Relay associated with the Transformer on Incomer 

1 and indicates the trip status of that relay. This external relay protects the Transformer Oil from 

overheating, which can prematurely age the Transformer. (Open = Healthy, Closed = Trip). 

Transformer Oil Temperature Incomer 2. 

This input is connected to an Oil Temperature Relay associated with the Transformer on Incomer 

2 and indicates the trip status of that relay. This external relay is the same as the one mentioned 

above. (Open = Healthy, Closed = Trip). 

Transformer Winding Incomer 1. 

This input is connected to a Winding Temperature Relay associated with the Transformer on 

Incomer 1 and indicates the trip status of that relay. This external relay protects the Transformer 

Winding from overheating, which can prematurely age the Transformer. 




Transformer Winding Incomer 2. 

This input is connected to a Winding Temperature Relay associated with the Transformer on 

Incomer 2 and indicates the trip status of that relay. This external relay is the same as the one 

mentioned above. (Open = Healthy, Closed = Trip). 

Transformer Oil Pressure Incomer 1(PRDS). 

This input is connected to a Transformer Pressure Relay associated with the Transformer on 

Incomer 1 and indicates the trip status of that relay. This external relay protects the Transformer 

Oil Pressure from reaching a dangerously high value, which can prematurely age the Transformer. 


Transformer Pressure Incomer 2(PRDS). 

This input is connected to a Transformer Pressure Relay associated with the Transformer on 

Incomer 2 and indicates the trip status of that relay. This external relay is the same as the one 

mentioned above. (Open = Healthy, Closed = Trip). 

IC1 Undervoltage. 

This input is connected to the Advanced Feedervision II on Incomer 1 (Position AFV1) and 

indicates whether that relay has tripped on Undervoltage. (Open = Healthy, Closed = Low Volts). 

IC2 Undervoltage. 

This input is connected to the Advanced Feedervision II on Incomer 2 (Position AFV3) and 

indicates whether that relay has tripped on Undervoltage. (Open = Healthy, Closed = Low Volts). 

Control Supply Incomer 1. 

This input indicates the when the voltage supply to the digital inputs on the Advanced 

Feedervision II associated with Incomer 1 (Position AFV1) is below what is required to read the 

digital inputs. (Open = Healthy, Closed = Trip). 

Control Supply Incomer 2. 

This input indicates the when the voltage supply to the digital inputs on the Advanced 

Feedervision II associated with Incomer 2 (Position AFV3) is below what is required to read the 

digital inputs. (Open = Healthy, Closed = Trip). 

Line VT Failure Incomer 1. 

This input indicates that the Line VT Failure Relay associated with the Advanced Feedervision II 

on Incomer 1 has tripped. (Open = Healthy, Closed = Trip). 



Line VT Failure Incomer 2. 

This input indicates that the Line VT Failure Relay associated with the Advanced Feedervision II 

on Incomer 2 has tripped. (Open = Healthy, Closed = Trip). 

TSS Selector (Incomer 1). 

This digital input is used in conjunction with the TSS Selector (Buscoupler) Input. They indicate 

to the Advanced Feedervision II that the Trip Selector Switch is set to trip Incomer 1 if TSS 

Selector is closed, to trip Buscoupler if TSS Selector (Buscoupler) is closed, or to trip Incomer 2 if 

both inputs are open. In the case where both inputs are closed an error mesasage appears on the 

display, "TSS Failure". 

This means that when the relay (AFV1) trips it should also trip the relay associated with Incomer 

2 (AFV3), the relay associated with the Buscoupler (AFV4) or the relay associated with Incomer 1 

(AFV 1). (Open = Trip Incomer 1, Closed = Trip Incomer 2). 

TSS Selector (Buscoupler). 

This input works with the TSS Selector (Incomer 1), see above. (Open = Trip Buscoupler, 

Closed = Trip Incomer 2). 

Remote Close Active In Remote IC1. 

This input closes the circuit breaker when the TSS Selector is set such that it does not trip the 

relay on Incomer 2 (AFV3). (Open = Neutral, Closed = Close). 

Remote Close Active In Remote IC2. 

This input closes the circuit breaker when the TSS Selector is set such that it does not trip the 

relay on Incomer 1 (AFV1). (Open = Neutral, Closed = Close). 

Breaker Service Incomer 1. 



(Open = Under Test, Closed = In Service). 

Breaker Service Incomer 2. 




Breaker Service Buscoupler. 

This input is connected to Buscoupler Circuit Breaker and indicates whether it is in the service (in 





Circuit Breaker On Incomer 1. 



Circuit Breaker On Incomer 2. 



Circuit Breaker On Buscoupler. 

This is connected to Buscoupler Circuit Breaker and indicates whether it is on (closed-allowing 


Trip Circuit. 

This input is connected to the isolated internal Trip Circuit Supervision Relay in the Advanced 

Feedervision II. When the internal relay trips it will indicate to the Advanced Feedervision II 

through the digital input that it has tripped. For further details see Section 10. (Open = Trip, 

Closed = OK). 

AC Bus A. 

This indicates to the Advanced Feedervision II that the 220V Undervoltage Relay on Bus A has 

tripped. (Open = Healthy, Closed = Alarm). 

AC Bus B. 

This indicates to the Advanced Feedervision II that the 220V Undervoltage Relay on Bus B has 


BC Close Permitted. 

This indicates to the Advanced Feedervision II that the circuit breaker on the Buscoupler is 

permitted to close. (Open = Fail, Closed = OK). 

Remote Trip. 

This input is an external trip input from the Local Control Panel to the relay telling it to trip. The 

command can originate from another relay or a switch. When the signal is received the relay will 

trip and open the circuit breaker. (Open = Neutral, Close = Trip). 

Remote Close. 

This input is an external input from the Local Control Panel to the relay to close the circuit 

breaker associated with the relay. The input can originate from another relay or a switch. When 

the signal is received the relay will close the circuit breaker. (Open = Neutral, Close = Close). 



Auto. 

This allows an Auto Transfer to occur should the situation permit it to happen. 

(Open = Neutral, Closed = Auto). 

Manual. 

This allows a Manual Transfer to occur should the situation permit it to happen. This input is 

mutually exclusive to the Auto input mentioned above. They should not be in the same state of 

open or close, if the Auto input is closed then the Manual input must be open and vice versa. If 

they are in the same state a trip or alarm is called depending upon the setting of the Auto/Manual 

Protection Function (Number 38) see section 14.5.2. (Open = Neutral, Closed = Manual). 

Incomer 1 Status. 

This input indicates to the Advanced Feedervision II the status of the Advanced Feedervision II 

Relay in the Position AFV1. (Open = Fault, Closed = Healthy). 

Incomer 2 Status. 

This input indicates to the Advanced Feedervision II the status of the Advanced Feedervision II 

Relay in the Position AFV3. (Open = Fault, Closed = Healthy). 

AFV2 Permissive. 

This input permits a close on AFV2. (Open = Do Not Close, Closed = Allow Close) 

Bus Voltage A >80%. 

This input when used in conjunction with the "Bus Voltage A80%" is closed then the 

voltage level is "Healthy", if "Bus Voltage A80%", see above 

(Open = Low Volts, Closed = Daed Bus). 

Bus A Fuse . 

This input indicates to the relay that the Bus A Line VT Fuse has gone open circuit indicating a 

trip. (Open = Healthy, Closed = Alarm). 



Bus B Fuse. 

This input indicates to the relay that the Bus B Line VT Fuse has gone open circuit indicating a 

trip. (Open = Healthy, Closed = Alarm). 

HT Supply Incomer 1. 

This indicates that the High Tension Supply to Incomer 1 is either On or Off. 

(Open = Off, Closed = On). 

HT Supply Incomer 2. 

This indicates that the High Tension Supply to Incomer 2 is either On or Off. 

(Open = Off, Closed = On). 

Auto Changeover Inhibit. 

This indicates that the Auto Changeover of the Auto Transfer Scheme is permitted. 

(Open = Permit, Closed = Inhibit). 

DSS Selector 

This input indicates to the Advanced Feedervision II that the Trip Selector Switch is set to trip 

Incomer 1 or to trip Incomer 2. This means that when the relay (AFV5) trips it should also trip the 

relay associated with Incomer 1 (AFV1) or the relay associated with Incomer 2 (AFV3). (Open = 

Trip Incomer 1, Closed = Trip Incomer 2). 

AC Bus Undervoltage 

This indicates to the Advanced Feedervision II that the Undervoltage Relay on the Bus has 


VT Fuse 

This input indicates to the relay that the Line VT Fuse has gone open circuit indicating a trip. 

(Open = Healthy, Closed = Alarm). 



10. Trip Circuit Supervision. 

The trip circuit encompasses more than just the relay. It passes through external components such 

as fuses, links, relay contacts, auxiliary switch contact and others. Errors in any of these external 

components could lead to a trip not being called and a breaker remaining closed. 

To protect against these failures the Advanced Feedervision II has two trip circuit supervision 

input circuits, one to monitor the trip relay and one to monitor the circuit breaker. Should they 

both read the same input, i.e. a trip has been called and the breaker is closed, the assigned output 

relay changes state. 

TYPICAL CONNECTIONS FOR SUPERVISION ELEMENTS 

+ve 

EXTRA CONTACTS 

IN PARALLEL 

-ve 

TRIP CONTACT(S) 

CB AUX SWITCH 

TRIP COIL 

TC 

TCS 1 TCS 2 

45 46 

47 48 


Trip Circuit Supervision 

The digital outputs provided by the Trip Circuit Supervision are then fed into an indication lamp 

or as a Digital Input to the Advanced Feedervision II, under the name of External Fault. 

The Trip Circuit Supervision Output Relays are Fail Safe. This means that on power up the relay 

change state. Therefore in the situation where power is lost to the Advanced Feedervision II an 

indication is given through the Trip Circuit. 

The output relays will enter an unhealthy state if one or both of the TCS Inputs are closed or if 

power is lost to the relay. The relays will only go back to a healthy state if both the inputs are 

open. 



11. Advanced Feedervision II Serial Port 

The Serial Port supplied with Advanced Feedervision II as standard utilises a half duplex RS485 

protocol allowing up to 32 Advanced Feedervision II's to be daisy-chained together with a single 

shielded twisted pair cable. 

The Advanced Feedervision II in addition to its very comprehensive protection and control 

features has been equipped with a very powerful data communications system. This extends its 

boundaries far beyond a feeder protection controller into the realms of a complete feeder 

management system. It provides a high-speed data acquisition to supervisory computers to form a 

complete feeder management system. 

Each Advanced Feedervision II can be connected to an isolated data highway using RS485 

communications. Up to 32 Advanced Feedervision II units can be connected to each data highway. 

The host system can interrogate the unit to monitor feeder status, load conditions, historical data 

and fault data as well as reset fault/alarm conditions. 

The Advanced Feedervision II is available with P&B Goldstart protocol installed for use with 

P&B’s Goldstart Integrated Protection, Control & Monitoring System or with a Slave 

implementation of Modbus RTU protocol for small systems where data concentration is not 

required. 

Full details of the protocols, device mapping and XXCell system are contained in the P&B 

Integrated Protection & Control System Integrators Manual, available on request. 



12. Advanced Feedervision II Faceplate Functions. 

The Advanced Feedervision II Faceplate has been designed to provide display and access to all the 

required information an operator may require. 

This is achieved by using a 2 tri-colour LED’s, a fully graphic LCD display and 4 function keys. 

This eliminates the need for additional indication devices on the front of the switch gear panel 

such as Lamps, Ammeter, Voltmeter, Hours Run Indicator, Operations Counter, etc. which helps 

reduce the cost of the switch gear panel and gives improved reliability by reduction of separate 

components. 

12.1. LED Status. 

The LED's on the front of the Advanced Feedervision II operates as follows: 

LED Colour Left LED - Feeder Status Right LED - Fault Status 

Green Open Healthy 

Yellow Tripped Alarm 

Red Closed Fault 



13. Graphical Display. 

The Advanced Feedervision II relay’s graphical interface is such that there are many menus and 

sub-menus to choose from so as to show the appropriate data on the screen. The menus and submenus 

are shown below in detail and shown in section 13.2 in their "tree" structure for quick 

access: - 

13.1. Menu Screens. 

Initial Screen 

DATA 

MENU 

DISPLAY 

SCROLL 



THE INTELLIGENT GENERATION 

030470 

V 2.206 09.23.98 

I1 

I2 

I3 

BREAKER 

CONTROL 

:12.5 A 

:12.5 A 

:12.5 A 

SETTING 

MENU 

On power up the Advanced Feedervision II screen appears for a few seconds. This screen shows 

the software version and the unit serial number, which should be noted for further reference. 

After the Introduction screen disappears then the Initial screen appears. This is the first screen to 

show any of the settings or readings of the relay. This screen shows the following areas of data: 

VALUES = 

These large lines of text normally gives the voltage, current values etc. 

When in a healthy state you can scroll down this data by pressing the topright 

button. The data line then changes to the next set of values such as 

current in the three phases to the earth fault currents. The screen then shows 

the next set of values in the list below. 

I1, I2, I3 

Ie, Istby (Just Ie if 3 Pole Overcurrent is chosen). 

Pwr1, Pwr2, Pwr3 

PF1, PF2, PF3 

V1, V2, V3 

V12, V23, V31 

Vsync, Angle 

Underneath the Values there appears the line '**Active Fault**' when there is a fault on the relay. 

On the screen appears a WARNING notice, overwriting the values on the screen, telling the user 

that a trip value has been exceeded and that a trip or alarm is imminent. The WARNING notice 

disappears when the trip or alarm occurs or when the trip value is no longer been exceeded. 



As well as showing all of the above data the Initial Screen allows the user to enter three other 

screens by pressing the top-left, bottom-left and bottom-right button. The three screens are 

13.1.1. DATA MENU (top-left button) 

13.1.2. BREAKER CONTROL (bottom-left button) 

13.1.3. SETTINGS MENU (bottom-right button) 

13.1.1. Data Menu. 

This screen continues to show all the data that is given by the 

initial screen but there are four screens accessible to the user 

by pressing any of the four buttons 

. 

13.1.1.1. MEASURED VALUES (top-left) 

13.1.1.2. STATS (top-right) 

13.1.1.3. FAULT DATA (bottom-left) 

13.1.1.4. EXIT (to the INITIAL SCREEN) 

(bottom-right) 

MEASURED 

VALUES 

FAULT 

DATA 

I1 

I2 

I3 

:12.5 A 

:12.5 A 

:12.5 A 

STATS 

EXIT 

13.1.1.1. Measured Values. 

DIGITAL 

VALUES 

I1 

I2 

I3 

:12.5 A 

:12.5 A 

:12.5 A 

ANALOGUE 

VALUES 

EXIT 

This screen continues to show all the data that is given by the initial 

screen but there are three screens accessible to the user by pressing any 

of the three buttons. 

13.1.1.1.1. DIGITAL VALUES (top-left) 

13.1.1.1.2. ANALOGUE VALUES (top-right) 

13.1.1.1.3 EXIT (to the DATA MENU) 


13.1.1.1.1. Digital Values. 

UP 

=====[DIGITAL VALUES]===== 

INPUT TEXT = NORMAL 

REMOTE TRIP 

=NEUTRAL 

REMOTE CLOSE 

=NEUTRAL 

LOCAL/REMOTE 

DOWN 

EXIT 

This screen displays the state of the digital inputs to the relay. The list 

of data can be scrolled through using the top-left button (UP) and the 

bottom-left button (DOWN). The bottom-right button (EXIT) takes the 

user back to the MEASURED DATA SCREEN. 

You are able to select what form you wish the data to be shown in. The 

options, which are chosen using the SELECT button, are NORMAL 

(as shown) or RAW (in which the digital inputs are displayed as logic 

states, (i.e. 'Inputs 1-6 = 001001', where 0=open and 1=closed)) 



13.1.1.1.2. Analogue Values. 

This screen displays the state of the analogue inputs to the relay. The 

list of data can be scrolled through using the top-left button (UP) and 

the bottom-left (DOWN). The bottom-right button takes the user back 

to the MEASURED DATA SCREEN. The analogue inputs that can 

be viewed are as follows: 

Ie (A) 

Istby (A) (Not Shown if 3 Pole Overcurrent is chosen) 

I1 (A) 

I2 (A) 

I3 (A) 

Vs (V) 

V0 (V) 

V1 (V) 

V2 (V) 

V3 (V) 

UP 

===[ANALOGUE VALUES]=== 

Ie 

Ist 

I1 

I2 

I3 

VO 

DOWN 

=0.34 A 

=0.34 A 

=8.9 A 

=8.9 A 

=8.9 A 

=110 V 

EXIT 

13.1.1.2. Stats. 

This screen lists the statistical data of the relay and can be scrolled 

up (top-left) and scrolled down (bottom-left). The bottom-right 

button takes you back to the DATA MENU. The RESET button 

(top-right) resets the value highlighted to zero. The list of statistical 

data is as follows: 

Total Hours Run 

Hours Run This Close 

No Of Operations 

Kilowatt Hours 1 + VAR 



kW Peak Demand 1 



UP 

=======[STATISTICS]======= 

Total Hours Run 

3 

Hours Run This Close 

1 

No Of Operations 

10 

DOWN 

RESET 

EXIT 

13.1.1.3. Fault Data. 

ACTIVE 

FAULT 

I1 

I2 

I3 

:12.5 A 

:12.5 A 

:12.5 A 

LAST 

FAULT 

This screen lists the previous alarms and faults that have 

occurred. There are three further screens that are accessible: 

13.1.1.3.1. ACTIVE FAULT (top-left) 

13.1.1.3.2. LAST FAULT (top-right) 

13.1.1.3.3. FAULT HISTORY (bottom-left) 

13.1.1.3.4. EXIT (to DATA MENU SCREEN) 


FAULT 

HISTORY 

EXIT 



13.1.1.3.1. Active Fault. 

This menu lists the Active Faults on the relay if there are any. 

The screen also allows the faults to be reset by pressing the 

top-right button. It will only allow a reset if it is no longer an 

active fault. The '*' next to the fault means that the fault is 

active. When this character disappears then the RESET 

FAULT option appears in the top-right button. The EXIT 

button (bottom-right) returns to the FAULT DATA SCREEN 

=====[ACTIVE FAULTS]===== 

AT * OVERVOLTAGE 

RESET 

FAULTS 

EXIT 

13.1.1.3.2. Last Fault. 

LAST 

TRIP 

LAST 

ALARM 

This screen then gives the user two further screens to 

choose from. 

I1 

I2 

I3 

:12.5 A 

:12.5 A 

:12.5 A 

13.1.1.3.2.1 LAST TRIP (top - left) 

13.1.1.3.2.2 LAST ALARM (top - right) 

13.1.1.3.2.3 EXIT (bottom-right) 

(returns to the FAULT DATA SCREEN) 

EXIT 

13.1.1.3.2.1. Last Trip. 

This screen shows the last trip and the values at the time of 

the trip. The values are as follows- 

Ie (A) 

Istby (A) (Not Shown if 3 Pole Overcurrent is chosen) 

I1 (A) 

I2 (A) 

I3 (A) 

Vs (V) 

V0 (V) 

V1 (V) 

V2 (V) 

V3 (V) 

UP 

======[LAST TRIP]====== 

MREF RELAY 

I0 = 2.5 A 

Istby = 2.5 A 

I1 = 25.4 A 

I2 = 25.4 A 

I3 = 25.4 A 

DOWN 

EXIT 

You can scroll up and down the list with the UP and DOWN buttons (top-left and bottom-left 

respectively). The EXIT button (bottom-right) returns to the LAST FAULT MENU. 



13.1.1.3.2.2. Last Alarm. 

UP 

=====[LAST ALARM]===== 

MREF RELAY 

I0 = 2.5 A 

Istby = 2.5 A 

I1 = 25.4 A 

I2 = 25.4 A 

I3 = 25.4 A 

This screen does the same as the LAST TRIP screen above 

except that it shows the last alarm that occurred on the relay. 

DOWN 

EXIT 

13.1.1.3.3. Fault History. 

TRIP 

HISTORY 

I1 

I2 

I3 

:12.5 A 

:12.5 A 

:12.5 A 

ALARM 

HISTORY 

EXIT 

This screen then gives the user two further screens to choose 

from. 

13.1.1.3.3.1 TRIP HISTORY (top - left) 

13.1.1.3.3.2 ALARM HISTORY (top - right) 

13.1.1.3.3.3 EXIT (bottom-right) 

(returns to the FAULT DATA SCREEN) 

13.1.1.3.3.1. Trip History. 

This screen shows the previous trips that have occurred on the 

relay. The list can be scrolled down with the use of the UP and 

DOWN buttons (top-left and bottom-left respectively). The EXIT 

button (bottom-right) returns to the FAULT HISTORY screen. 

UP 

====[TRIP HISTORY]==== 

EARTH FAULT 1 

13.1.1.3.3.2. Alarm History. 

DOWN 

EXIT 

UP 

====[ALARM HISTORY]==== 

EARTH FAULT 1 

This screen does the same as the TRIP HISTORY screen 

above except that it shows the previous alarms that have 

occurred on the relay. 

DOWN 

EXIT 



13.1.2. Breaker Control. 

CLOSE 

This menu allows the user the facility to open and close the 

breaker depending on the breaker's current status. If the breaker 

is already open pressing the open button will respond in a 

message ‘Already Open’ appearing on the screen. The same 

applies if the user tries to close the breaker when it is already 

closed. The EXIT button takes the user back to the Initial 

Menu. 

EXIT 

I1 

I2 

I3 

:12.5 A 

:12.5 A 

:12.5 A 

OPEN 

13.1.3. Setting Menu. 

UP 

ENTER PASSWORD 

'AA' 

DOWN 

NEXT 

OK 

Before entering the SETTING MENU the user is asked to enter the 

password. Note that the password option must be enabled in the Unit 

Settings Menu. 

The top-left button scrolls the password letter up the alphabet with the 

bottom left button scrolling down the alphabet. The NEXT button (topright) 

then prompts the user for the next letter of the password. The 

default password is '6363'. 

When the correct password is chosen it is entered by pressing the OK button (bottom left) 

If the incorrect password is entered the screen displays the message 'PASSWORD IS INVALID' 

and then returns to the INITIAL MENU SCREEN. 

When the correct password is entered the SETTINGS MENU SCREEN appears. 

This screen gives the setting parameters that can be viewed 

and changed by the user. The setting parameters are split into 

three categories that are viewed as separate screens. They 

are: 

13.1.3.1. CONTROL SETTINGS (top-left) 

13.1.3.2. PROTECT SETTING (top-right) 

13.1.3.3. SYSTEM SETTINGS (bottom-left) 

13.1.3.4. EXIT (returns to the INITIAL SCREEN) 


CONTROL 

SETTINGS 

I1 

I2 

I3 

SYSTEM 

SETTINGS 

:12.5 A 

:12.5 A 

:12.5 A 

PROTECT 

SETTINGS 

EXIT 



13.1.3.1. Control Settings. 

I1 

I2 

I3 

RELAY 

SETTINGS 

:12.5 A 

:12.5 A 

:12.5 A 

DIGITAL 

INPUTS 

EXIT 

This screen details the options that control the circuit Breaker. 

It has two further screens that are accessible. 

13.1.3.1.1. DIGITAL INPUTS (top-right) 

13.1.3.1.2. RELAY SETTINGS (bottom-left) 

13.1.3.1.3. EXIT (to SETTING MENU SCREEN) 

(bottom right) 



13.1.3.1.3. Relay Settings. 

UP 

SELECT 

In this menu screen functions can be assigned to the eight relays. 

=====[RELAY OUTPUTS]===== 

Relay 1 = CLOSE 

Relay 2 = TRIP 

Relay 3 = SERIAL 

Relay 4 = WARN 1 

The list of possible outputs is shown below. 

DOWN 

EXIT 

OUTPUT 

RELAY 

No 

OUTPUT 

WHEN SET 

TO AFV1 

OUTPUT 

WHEN SET 


OUTPUT 

WHEN SET 

TO AFV3 

OUTPUT 

WHEN SET TO 

AFV4 

OUTPUT 

WHEN SET 

TO AFV5 





5 Programmable Programmable Programmable SERIAL Programmable 

6 Programmable Programmable Programmable TRIP IC2 Programmable 


8 Programmable Programmable Programmable AUTO ALARM Programmable 



Note: Those listed above in capitals are those pre-set by the relay depending upon the position 

chosen. 

Where it says Programmable in the table above it means that the user can chose what is assigned 

to that relay from the list below: - 

Programmable = Not Used, Warn 1, Warn 2, Alarm, Indic 1 -5, 

Alarm FS, Trip Fs, Indic 1FS - 5FS, DCS Available. 

13.1.3.1.A Value Change Screen. 

UP 

STORE 

=========[TRIP TIME]========= 

1 s 

In this screen the value is increased or decreased with the use of the UP 

and DOWN buttons (top-left and bottom-left). The STORE button 

(top-right) stores the value in the memory when Exiting whilst the 

ABANDON button (bottom-right) Exits without saving the new value. 

The bar underneath the value indicates the chosen value in its relative 

position in the range of values i.e. at the lowest end of the range. 

DOWN 

ABANDON 



13.1.3.2. Protection Settings. 

In this screen all the protection function settings are shown and it 

also indicates whether the setting, alarm and trip is enabled. 

An 'A' means the ALARM is enabled for that function. 

T means the TRIP is enabled. 

A '√' (tick) indicates that the function has been enabled. 

'OFF' means that the function has been disabled. 

UP 

=====[PROTECTION]===== 

AT Undervoltage 

A Overvoltage 

T Earth Fault 1 HS 

OFF Earth Fault 2 HS 

Earth Fault 1 

AT Earth Fault 2 

DOWN 

SELECT 

EXIT 

When a function is chosen using the SELECT button (top-right) the FUNCTION SCREEN 

appears for that protection function. 

13.1.3.2.1. Function Screen. 

UP 

====[UNDERVOLTAGE]==== 

FUNCTION 

WARN 1 

WARN 2 

ALARM 

TRIP 

INDICATOR 1 

SELECT 

= ENABLED 

= DISABLED 

= ENABLED 

= ENABLED 

= ENABLED 

= ENABLED 

The list can be scrolled through by using the UP and DOWN 

buttons (top-left and bottom-left). The EXIT button (bottomright) 

returns to the PROTECT SETTINGS MENU. 

DOWN 

EXIT 

All the functions have the following properties, 

Function, Warn 1, Warn 2, Alarm, Trip, Indicator 1-5, Inhibit 

Auto-Reset, Panel-Reset, and Serial-Reset. 

(When the Position is set to either AFV1, 2, 3 or 5) 

Function, Alarm, Trip, Inhibit, Auto-Reset, Panel-Reset, and Serial-Reset. 

(When the Position is set to AFV4) 

These can be enabled or disabled by pressing the select button once the functions highlighted. 



There are other properties that the functions have. The different functions and values that can be 

assigned to it are shown in the table below. This is a full list of all the protection functions 

available for the five positions in the Auto Transfer Schemes. 

Value 1 Value 2 Value 3 

Undervoltage Trip Level Trip Time 

Overvoltage Trip Level Trip Time 

Earth Fault 1 HS Trip Level Trip Time 

Earth Fault 2 HS Trip Level Trip Time 

Earth Fault 1 Characteristic Trip Level Trip Time/Multiplier 

Earth Fault 2 Characteristic Trip Level Trip Time/Multiplier 

Load Increase Trip Level Trip Time 

Overcurrent 1 Characteristic Trip Level Trip Time/Multiplier 

Overcurrent 2 Characteristic Trip Level Trip Time/Multiplier 

Low Set Overcurrent Trip Level Trip Time 

Short Circuit Trip Level Trip Time 

Synchronisation Max Angle Trip Time Volt Diff 

Breaker Fail 

Trip Time 

Local / Remote 

Trip Time 

MREF Relay 

Trip Time 

Buchholz Relay Trip Time 

Oil Temperature Trip Time 

Winding Temp 

Trip Time 

PRDS Trip 

Trip Time 

Control Supply 

Trip Time 

Trip Circuit 

Trip Time 

Line VT Failure Trip Time 

Serial Timeout 

Trip Time 

Internal Error 

Dead Bus Trip Level Trip Time 

Healthy Bus Trip Level Trip Time 

Buchholz Relay 1 Trip Time 

Buchholz Relay 2 Trip Time 

Oil Temperature 1 Trip Time 

Oil Temperature 2 Trip Time 

Winding Temperature 1 Trip Time 

Winding Temperature 2 Trip Time 

MOGL 1 

Trip Time 

MOGL 2 

Trip Time 

AC Bus A Undervoltage Trip Time 

AC Bus B Undervoltage Trip Time 

Breaker In Service 

Auto Manual 

Bus A VT Fuse 

Trip Time 

Bus B VT Fuse 

Trip Time 

IC1 Breaker Fail Trip Time 

IC2 Breaker Fail Trip Time 

Auto Changeover Trip Time 

AC Bus Undervoltage Trip Time 

Bus VT Fuse 

Trip Time 

Emergency Transformer Trip Time 

Value 1, 2 and 3 can be changed. When they are selected the VALUE CHANGE SCREEN 

appears. 



When Characteristic is chosen the user can choose from four options, DEFT, NINV, VINV and 

EINV using the Select Button to scroll through them. These refer to the time curves that the relay 

will adhere to for that protection function. 

When DEFT is chosen the user cannot set the Time Multiplier. 

When NINV, VINV and EINV is chosen the user cannot set the Trip Time. 

13.1.3.3. System Settings. 

FEEDER 

SETTINGS 

I1 

I2 

I3 

UNIT 

SETTINGS 

:12.5 A 

:12.5 A 

:12.5 A 

SERIAL 

SETTINGS 

EXIT 

This screen gives three further screens to access. 

13.1.3.3.1 FEEDER SETTINGS (top-left) 

13.1.3.3.2 SERIAL SETTINGS (top-right) 

13.1.3.3.3 UNIT SETTINGS (bottom-left) 

13.1.3.3.4 EXIT (to SETTING MENU SCREEN) 




13.1.3.3.1. Feeder Settings. 

UP 

SELECT 

====[FEEDER SETTINGS]==== 

Position = AFV1 

Voltage 

= 110V 

CT Primary 

= 50 A 

CCR 

This screen allows the user to change the feeder settings of the relay. 

The list of values to be changed can be scrolled through by pressing the 

UP and DOWN buttons (top-left and bottom left). A value can be 

selected to have its value changed by pressing the SELECT button 

(top-right) when the value is highlighted. This then brings up the 

VALUE CHANGE SCREEN. The EXIT button (bottom-right) returns 

to the SYSTEM SETTINGS MENU. 

DOWN 

EXIT 

follows: 

The values to be changed, depending upon the position chosen, are as 

Position ✞ ★ ✪ ✤ 

Overcurrent Poles ✞ ★ ✪ ✤ 

Synchronisation ✞ ★ ✪ ✤ 

Line Voltage ✞ ★ ✪ ✤ 

VT Primary ✞ ★ ✪ ✤ 

VT Secondary ✞ ★ ✪ ✤ 

CT Primary ✞ ★ 

CCR (Continuos Current Rating) ✞ ★ 

Earth Fault 1 Primary ✞ ★ 

Earth Fault 2 Primary ✞ ★ 

kW Sample Period ✞ ★ 

Dead Bus Level ✞ ✤ 

Parallel Time✪ ✤ 

HT 1 Delay ✪ 

HT 2 Delay ✪ 

✞These parameters are used for position AFV1 and AFV3 only. 

★These parameters are used for position AFV2 only. 

✪These parameters are used for position AFV4 only. 

✤These parameters are used for position AFV5 only. 

Before you can change the position of the relay you must enter a password. This password is 

entered using the same screen when entering the Setting Menu. The password is different from the 

previous one and cannot be disabled. The Default password is 'PBACS'. 



13.1.3.3.2. Serial Settings. 

This screen allows the user to change the communication aspects of 

the relay, which are as follows: - 

Serial, Feeder Number, Baud Rate, Serial Delay, 

Fast Scan 1-3. 

UP 

SELECT 

====[SERIAL SETTINGS]==== 

Serial 

= Enabled 

Feeder Number = 1 

Baud Rate = 9600 

Serial Delay = 5 ms 

Fast Scan 1 = 10 

Fast Scan 2 = 26 

The serial communications can be ENABLED or DISABLED by 

pressing the SELECT button when Serial is highlighted. 

DOWN 

EXIT 

The Feeder number is changed by selecting it using the SELECT button (top-right). This brings up 

the VALUE CHANGE SCREEN. 

Pressing the SELECT button changes the Baud Rate. This selects the values of either 19200, 9600 

or 38400 for the Baud Rate. 

The Fast Scans 1-3 bring up the VALUE CHANGE SCREEN. 

The EXIT button (bottom-right) returns to the SYSTEM SETTINGS MENU. 

13.1.3.3.3. Unit Settings. 

UP 

====[FEEDERVISION]==== 

Software Ver 0.97 27/5/97 

Unit ID No 160217 

Password = Enabled 

Change Password 

Edit Custom Strings 

LCD Backlight 

DOWN 

SELECT 

EXIT 

This screen allows the user to change certain characteristics of 

the relay. The characteristics are as follows: - 

Software Version and Date 

Unit ID 

Password enabled/disabled 

Change password 

Customise Strings 

LCD Backlight 

LCD Contrast 

Set Default Page 

User Calibration 

The list can be scrolled through using the UP and DOWN buttons (top-left and top-right). When a 

value is selected using the SELECT buttons the following happens; 

The list can be scrolled through using the UP and DOWN buttons (top-left and top-right). 

The Password can be ENABLED or DISABLED using the SELECT button. 

Change Password, Edit Custom Strings, LCD Backlight and LCD Contrast brings up the VALUE 

CHANGE. 

When you select Customise strings it brings up a new screen. 



13.1.3.3.3.1. Customise Strings 

UP 

SELECT 

I/P CUSTOM STRINGS 

17 Emergency Strings 

23 MREF External 

24 Xform Bucholz 

1 Xform Oil Temp 

2 Xform Winding 

3 Xform PRDS 

This screen allows the user to change the name of certain digital inputs 

to whatever the user wishes. This will then affect the corresponding 

Protection Function. 

Once the input is selected it brings up a VALUE CHANGE SCREEN 

where the user can enter a new name. 

DOWN 

EXIT 

The digital inputs that can be changed are as follows:- 

Inputs when set to 

AFV1 


AFV2 


AFV3 

Inputs when 

set to AFV4 

Inputs when set 

to AFV5 

Emergency Xform Xform 1 Buchholz Emergency Xform none Xform Buchholz 

MREF External Xform 1 Oil Temp MREF External Xform Oil Temp 

Xform Buchholz Xform 1 Winding Xform Buchholz Xform Winding 

Xform Oil Temp Xform 1 PRDS Xform Oil Temp Xform PRDS 

Xform Winding Xform 2 Buchholz Xform Winding 

Xform PRDS Xform 2 Oil Temp Xform PRDS 

Xform 2 Winding 

Xform 2 PRDS 



13.2. Menu Tree Structure. 



14. Setting Pages Summary. 

Range Steps Default Value 

SERIAL SETTINGS. 

Serial. 

Enabled / Disabled 

Feeder Number. 1 - 32 1 0 

Baud Rate. 9600 / 19200 / 38400 9600 

Serial Delay. 1ms - 250ms 1 

Max Fast Scan 0-30s 1 

Fastscan Analogue 1. 0 - 126 0 



FEEDER SETTINGS. 

Position. 

AFV1-5 

Overcurrent Poles 3+1 / 2+2 

Synchronisation 

Ph/n or Ph/Ph 

Voltage. 

50-150% of VT Primary 

VT Primary 

100V - 33000V 

VT Secondary 

100V - 415V 

CT Primary. 

50 - 4000A 

Continuous Current Rating (CCR). 50-100% 100% 

E/F 1 CT Primary. 50-4000A 100A 

E/F 2 CT Primary. 50-4000A 100A 

kW Sample Period. 

1min 60min 

Dead Bus Level 15 - 50% 

Parallel Time. 

0.1-1.0s 

HT1 Delay. 

0.5-5.0s 

HT2 Delay. 

0.5-5.0s 

DIGITAL SETTINGS. 

Outputs Relay 2-8. Not Used, Warn1-2, Alarm, Indicator 1-5, 

Alarm FS, Trip FS, Indicator 1FS-5FS, DCS Available 

UNIT SETTINGS 

Password Enabled/Disabled Disabled 

Change Password 5 Characters 6363 

Edit Custom Strings 

18 Characters 

Default Return Time No Return(Off) 1,2,4,8min Off 



Protection Settings. 

Range Steps Default Value 

Undervoltage Setting . 50-95% 80% 

Undervoltage Delay. 0.5-5 Sec 5 Sec 

Overvoltage. 105-150% 120% 

Overvoltage Delay. 1-100 Sec 1 Sec 

Earth Fault 1 High Set Setting. 5-200%In 

Earth Fault 1 High Set Delay. 

0.1-2.0 sec 

Earth Fault 2 High Set Setting. 5-200% In 

Earth Fault 2 High Set Delay. 

0.1-2.0 sec 

Earth Fault 1 Characteristic. DEFT, NINV, VINV, EINV DEFT 

Earth Fault 1 Setting 5-200% 

Earth Fault 1 Delay. 

0.1-120 sec 

Earth Fault 1 Multiplier 0.1-10 

Earth Fault 2 Characteristic. DEFT, NINV, VINV, EINV DEFT 

Earth Fault 2 Setting 5-200% 

Earth Fault 2 Delay. 

0.1-120 sec 

Earth Fault 2 Multiplier 0.1-10 

Load Increase Alarm. 50-150% CCR 120% 

Load Increase Delay. 1-120 sec 1 sec 

Overcurrent 1 Characteristic. DEFT, NINV, VINV, EINV DEFT 

Overcurrent 1 Setting. 50-400% 

Overcurrent 1 Delay. 

1-120 sec 

Overcurrent 1 Multiplier 0.1-10 

Overcurrent 2 Characteristic. DEFT, NINV, VINV, EINV DEFT 

Overcurrent 2 Setting. 50-400% 

Overcurrent 2 Delay. 

1-120 sec 

Overcurrent 2 Multiplier 0.1-10 

Low Set Overcurrent Setting. 150-1000% 

Low Set Overcurrent Delay. 

0.5-5.0 sec 

Short Circuit Setting. 400-2000% 

Short Circuit Delay. 

0.1-2.0 sec 

Synchronisation Max Angle. 2-30° 

Synchronisation Delay. 

0.5 - 5sec 

Synchronisation Voltage Difference. 1-20% 

Breaker Fail Delay. 

0.5-10.0 sec 

Local / Remote Delay. 

0.1-1.0 sec 

MREF Relay Delay. 

0.1-1.0 sec 

Buchholz Relay Delay. 

0.1-1.0 sec 

Oil Temperature Delay. 

0.1-1.0 sec 

Winding Temperature Delay. 

0.1-1.0 sec 

PRDS Relay Delay. 

0.1 1.0 sec 

Control Supply Delay. 

0.1-1.0 sec 

Trip Circuit Delay. 

0.1-1.0 sec 

Line VT Failure Delay. 

0.1-1.0 sec 

Serial Time-Out Delay. 

5-120sec 

Dead Bus Setting. 15%-50% 

Dead Bus Delay. 

0.5-5.0s 

Healthy Bus Setting. 50%-95% 

Healthy Bus Delay. 

0.5-5.0s 

Buchholz Relay 1 Delay. 

0.1-1.0s 

Buchholz Relay 2 Delay. 

0.1-1.0s 

Oil Temperature 1 Delay. 

0.1-1.0s 

Oil Temperature 2 Delay. 

0.1-1.0s 

Winding Temp 1 Delay. 

0.1-1.0s 

Winding Temp 2 Delay. 

0.1-1.0s 

MOGL 1 Delay. 

0.1-1.0s 

MOGL 2 Delay. 

0.1-1.0s 

AC Bus A Delay. 

0.1-1.0s 

AC Bus B Delay. 

0.1-1.0s 

Auto / Manual Delay. 

0.1-1.0s 

Bus A VT Fuse Delay. 

0.1-1.0s 

Bus B VT Fuse Delay . 0.1-1.0s 

IC1 Breaker Fail Delay. 

0.5-10.0s 

IC2 Breaker Fail Delay. 

0.5-10.0s 

Bus VT Fuse Delay 

0.1-1.0 s 

AC Bus Undervoltage Delay 

0.1-1.0 s 

Emergency Transformer 

0.1-1.0 s 



Protection Logic Settings. 

Function Warn Alarm Trip Indicator Inhibit Auto Panel Serial 

1&2 1-5 Reset Reset Reset 

Undervoltage. E/D E/D E/D E/D E/D E/D E/D E/D E/D 

Overvoltage. E/D E/D E/D E/D E/D E/D E/D E/D E/D 

Earth Fault 1 High Set. E/D E/D E/D E/D E/D E/D E/D E/D E/D 

Earth Fault 2 High Set. E/D E/D E/D E/D E/D E/D E/D E/D E/D 

Earth Fault 1. E/D E/D E/D E/D E/D E/D E/D E/D E/D 

Earth Fault 2. E/D E/D E/D E/D E/D E/D E/D E/D E/D 

Load Increase. E/D E/D E/D E/D E/D E/D E/D E/D E/D 

Overcurrent 1. E/D E/D E/D E/D E/D E/D E/D E/D E/D 

Overcurrent 2. E/D E/D E/D E/D E/D E/D E/D E/D E/D 

Low Set Overcurrent. E/D E/D E/D E/D E/D E/D E/D E/D E/D 

Short Circuit. E/D E/D E/D E/D E/D E/D E/D E/D E/D 

Synchronisation. E/D E/D E/D E/D E/D E/D E/D E/D E/D 

Breaker Fail. E/D E/D E/D E/D E/D E/D E/D E/D E/D 

Local/Remote. E/D E/D E/D E/D E/D E/D E/D E/D E/D 

MREF Relay. E/D E/D E/D E/D E/D E/D E/D E/D E/D 

Buchholz Relay. E/D E/D E/D E/D E/D E/D E/D E/D E/D 

Oil Temperature. E/D E/D E/D E/D E/D E/D E/D E/D E/D 

Winding Temperature. E/D E/D E/D E/D E/D E/D E/D E/D E/D 

PRDS Relay. E/D E/D E/D E/D E/D E/D E/D E/D E/D 

Control Supply. E/D E/D E/D E/D E/D E/D E/D E/D E/D 

Trip Circuit. E/D E/D E/D E/D E/D E/D E/D E/D E/D 

Line VT Failure. E/D E/D E/D E/D E/D E/D E/D E/D E/D 

Serial Timeout. E/D E/D E/D E/D E/D E/D E/D E/D E/D 

Internal Error. E/D E/D E/D E/D E/D E/D E/D E/D E/D 

Dead Bus. E/D E/D E/D E/D E/D E/D E/D E/D E/D 

Healthy Bus. E/D E/D E/D E/D E/D E/D E/D E/D E/D 

Buchholz Relay 1. E/D E/D E/D E/D E/D E/D E/D E/D E/D 

Buchholz Relay 2. E/D E/D E/D E/D E/D E/D E/D E/D E/D 

Oil Temperature 1. E/D E/D E/D E/D E/D E/D E/D E/D E/D 

Oil Temperature 2. E/D E/D E/D E/D E/D E/D E/D E/D E/D 

Winding Temp 1. E/D E/D E/D E/D E/D E/D E/D E/D E/D 

Winding Temp 2. E/D E/D E/D E/D E/D E/D E/D E/D E/D 

MOGL 1. E/D E/D E/D E/D E/D E/D E/D E/D E/D 

MOGL 2. E/D E/D E/D E/D E/D E/D E/D E/D E/D 

AC Bus A. E/D E/D E/D E/D E/D E/D E/D E/D E/D 

AC Bus B. E/D E/D E/D E/D E/D E/D E/D E/D E/D 

Breaker In Service. E/D E/D E/D E/D E/D E/D E/D E/D E/D 

Auto/Manual. E/D -- E/D E/D -- E/D E/D E/D E/D 

Bus A VT Fuse. E/D -- E/D E/D -- E/D E/D E/D E/D 

Bus B VT Fuse. E/D -- E/D E/D -- E/D E/D E/D E/D 

IC1 Breaker Fail. E/D -- E/D E/D -- E/D E/D E/D E/D 

IC2 Breaker Fail. E/D -- E/D E/D -- E/D E/D E/D E/D 

Auto Changeover. E/D -- E/D E/D -- E/D E/D E/D E/D 

AC Bus Undervoltage E/D E/D E/D E/D E/D E/D E/D E/D E/D 

VT Fuse E/D E/D E/D E/D E/D E/D E/D E/D E/D 

Emergency Transformer. E/D E/D E/D E/D E/D E/D E/D E/D E/D 

E=Enable, D=Disable 



14.1. Serial Setting. 

Serial. 

This option determines whether the communication aspect of the Advanced Feedervision II is to 

be used at all. It can either be set to Enabled or Disabled, with a default setting of Enabled 

Feeder Number. 

This setting range 1-32 with a default setting of 1, identifies the Advanced Feedervision II unit to 

the XCell unit to which the RS485 Data Highway is connected, and is also required to be set if the 

setting software is to be used. 

Baud Rate. 

This setting range 9600, 19200 or 38400 Bits/Second with a default setting of 9600, determines 

the speed of communications. 

Serial Delay. 

This setting range 1ms to 250ms determines the delay between the request for information from 

the XCell and the sending of information through the communication link by the Advanced 

Feedervision II. This is in steps of 1ms in the range 1 to 10 ms and in steps of 10ms in the range 

10 to 250ms. 

Max Fast Scan. 

This setting, range 0-30 sec, in steps of 1 sec, determines the Fast Scan Update Time, i.e. the 

timeframe that the PCX asks for the Fast Scan Data from the relay. 

Fast Scan 1-3. 

This setting range 0-126 in steps of 1 determines the data that is sent to the XXCell during the fast 

scan cycle. Other details are read during a normal scan, which is done less often. The settings refer 

to the addresses of the data in the software of the relay. 

Note. 

The above settings are used for all positions of the Advanced Feedervision II in the Auto Transfer 

Scheme. 



14.2 Feeder Settings. 

Position. 

This setting determines the position of the Advanced Feedervision II in the Auto-Transfer 

Scheme. The relay can be set to AFV1 (Incomer 1 Protection), AFV2 (Bus Coupler Protection), 

AFV3 (Incomer 2 Protection), AFV4 (Bus Coupler Controller) or AFV5 (Controller). When this 

is set it determine what is assigned to the Digital Inputs, the Relay Outputs, the Feeder Settings 

and the Protection Functions used. For more details on the Auto Transfer Scheme see section 16. 

Overcurrent Poles. 

This setting determines the current inputs to the Advanced Feedervision II. This can be set to 

either 3+1, (3 Phase Currents and 1 Earth Fault Current) or 2+2 (2 Phase Currents, third is 

calculated. and 2 Earth Fault Currents). This will then effect some of the Protection Functions (i.e. 

Earth Fault 2 is not available when in 3+1 mode) 

Synchronisation 

This setting, which can be set to Ph/n or Ph/Ph indicates to the Advanced Feedervision II which 

way the synchronisation voltage is connected. 

Voltage. 

This setting range, 50-49500V in steps of 1V with default setting of 240V, enables the Advanced 

Feedervision II to display the measured voltages in exact volts. The setting range shown on the 

display is actually 50-150% of the VT Primary, displayed in volts. This means that the VT 

Primary should be set before the Voltage, as an increase in the VT Primary will automatically 

increase the Voltage Range. As the VT Primary is increased so is the Line Voltage range, with a 

max-min of 50-49500V. 

VT Primary. 

This setting, range 100V to 33000V with a default setting of 415V, should be set to the primary 

rating of the voltage transformer. This is in steps of 1V. 

VT Secondary. 

This setting, range 100V to 415V with a default setting of 100V, should be set to the secondary 

rating of the voltage transformer. This is in steps of 1V. 



CT Primary. 

This setting, range 50-4000 Amps with a default setting of 100A, determines the primary ratio for 

the phase current transformers. This is in steps of 5 Amps in the range 50 to 100 Amps, in steps of 

10 Amps in the range 100 to 1000 Amps and in steps of 50 Amps in the range 1000 to 4000 

Amps. 

Constant Current Rating. 

Range 50-100%, in steps of 5%, determines the current being controlled by the breaker. The 

Constant Current Rating (CCR) is a percentage of the CT Primary. 

Earth Fault 1 Primary. 

This setting range 50-4000 Amps determines the primary ratio of the core balance earth fault CT 

if used. If a residual connection of phase CT's is used this setting must be the same as for the 

phase CT primary setting. This is in steps of 5 Amps in the range 50 to 100 Amps, in steps of 10 

Amps in the range 100 to 1000Amps and in steps of 50 Amps in the range 1000 to 4000 Amps. 

Earth Fault 2 Primary. 

This setting range 50-4000 Amps determines the primary ratio of the core balance standby earth 

fault CT, if used. If a residual connection of phase CT's is used this setting must be the same as for 

the phase CT primary setting. This is in steps of 5 Amps in the range 50 to 100 Amps, in steps of 

10 Amps in the range 100 to 1000 Amps and in steps of 50 Amps in the range 1000 to 4000 

Amps. 

kW Sample Period. 

This setting range 1-60 minutes in steps of 1 minute determines the period over which a 

measurement is taken for the Kilowatt Hours value. 

Dead Bus Level 

This setting determines the voltage level on the Bus for the Advanced Feedervision II to recognise 

the Bus as being in an Unhealthy or Dead state. The range is from 15% to 50% in steps of 5%, and 

is read from the Protection Function Dead Bus Setting, and therefore cannot be changed here. 



Parallel Time. 

This is the maximum time that the three circuit breakers (Incomer 1, Incomer 2 and Bus Coupler) 

can be closed at the same time during the Auto Transfer Process. The range of the settings is 

between 0.1 seconds and 1.0 seconds in steps of 0.1 seconds. 

HT1 Delay. 

This is the minimum time between the HT Circuit Breaker on Incomer 1 opening and the Auto 

Transfer Scheme taking place. The range of the settings is between 0.5 seconds and 5.0 seconds in 

steps of 0.1 seconds. 

HT2 Delay. 

This is the minimum time between the HT Circuit Breaker on Incomer 2 opening and the Auto 

Transfer Scheme taking place. The range of the settings is between 0.5 seconds and 5.0 seconds in 

steps of 0.1 seconds. 

Note. 

1) When position is set to AFV1 or AFV3 only the following is used:- 

Position, Overcurrent Poles, Synchronisation, Voltage, VT Primary, VT Secondary, 

CT Primary, CCR, E/F 1 CT Primary, E/F 2 CT Primary, kW Sample Period, Dead Bus Level. 

2) When position is set to AFV 2 only the following is used:- 


CT Primary, CCR, E/F 1 CT Primary, E/F 2 CT Primary, kW Sample Period. 

3) When position is set to AFV4 only the following is used:- 


Parallel Time, HT1 Delay and HT2 Delay. 

4) When position is set to AFV5 only the following is used:- 


Parallel Time, Dead Bus Level. 



14.3 Digital Input Settings. 

There are many possible Digital Inputs for the Advanced Feedervision II to choose from. It does 

this depending upon the position of the relay. They are shown below: - 

Digital Advanced Feedervision II Position 

Input AFV1 AFV2 AFV3 AFV4 AFV5 

No 

1 TNC Trip Transformer TNC Trip Remote Trip DSS Selector 

Buchholz IC1 

2 TNC Close Transformer Oil TNC Close Remote Close 

Active In Local Temp IC1 Active In Local 

3 Remote Transformer 

Winding IC1 

Remote Remote AC Bus 

Undervoltage 

4 Local Transformer 

MOGL IC1 

Local Local IC2 

Undervoltage 

5 Emergency 

Transformer 

Transformer 

Buchholz IC2 

Emergency 

Transformer 

Auto 

Control 

Supply 

6 Transformer Oil 

Manual VT Fuse 

Temp IC2 

7 Incomer 2 Service Transformer 

Winding IC2 

Incomer 1 Service Incomer 1 

Service 

8 Buscoupler Service Transformer 

Pressure IC2 

Buscoupler Service Incomer 2 

Service 

9 Incomer 2 State Incomer 1 State Incomer 1 State 

10 Buscoupler State Buscoupler State Incomer 2 State 

11 MREF External MREF External Incomer 1 

Status 

12 Transformer 

Buchholz IC1 

Transformer 

Buchholz IC2 

Incomer 2 

Status 

13 Transformer Oil 

Temp IC1 

Transformer Oil 

Temp IC2 

TSS Selector 

BC 

Transformer 

Buchholz 

14 Transformer 

Winding IC1 

Transformer 

Winding IC2 

TSS Selector 

IC1 

Transformer 

Oil Temp 

15 Transformer(PRDS) 

Pressure IC1 

BC Close 

Permitted 

Transformer(PRDS) 

Pressure IC2 


Permissive 

Transformer 

Winding 

16 IC2 Undervoltage AC Bus A IC1 Undervoltage Bus Voltage A 

>80% 

Transformer 

MOGL 

17 Control Supply IC1 AC Bus B Control Supply IC2 Bus Voltage A Auto 


Custom Strings. 

The digital inputs listed below have been pre-assigned with text strings suitable for a typical ATS. 

Where required the text descriptions of these inputs may be edited to suit individual applications. 

The digital inputs that can be changed are as follows:- 


AFV1 




AFV3 

Inputs when 

set to AFV4 

Inputs when 

set to AFV5 

5.Emergency Xform 

(46) 

1. Xform 1 Buchholz 

(27) 

5. Emergency Xform 

(46) 

none 13.Xform 

Buchholz (16) 

11.MREF External 

(15) 

2. Xform 1 Oil Temp 

(29) 

11. MREF External 

(15) 

14.Xform Oil 

Temp (17) 

12.Xform Buchholz 

(16) 

3. Xform 1 Winding 

(31) 

12. Xform Buchholz 

(16) 

15.Xform 

Winding(18) 

13.Xform Oil Temp 

(17) 

4. Xform 1 MOGL 

(33) 

13. Xform Oil Temp 

(17) 

16. Xform 

PRDS (19) 

14.Xform Winding 

(18) 

5. Xform 2 Buchholz 

(28) 

14. Xform Winding 

(18) 

15.Xform MOGL 

(19) 

6. Xform 2 Oil Temp 

(30) 

15. Xform MOGL 

(19) 

7. Xform 2 Winding 

(32) 

8. Xform 2 MOGL 

(34) 

NOTE. The numbers to the left refer to the digital input. The number in the brackets refers to the 

corresponding protection function. 

If the name is changed to one the user wishes then this affect the corresponding Protection 

Function. 



14.4. Relay Output Settings. 

Programmable Output Relays 1 to 8. 

Some of the output relays are pre-programmed according to the Position selected. For possible 

outputs see the table below. The user programmable settings can be selected from the list shown 

below. 

OUTPUT 

RELAY 

NUMBER 

OUTPUT 

WHEN SET 

TO AFV1 

OUTPUT 

WHEN SET 


OUTPUT 

WHEN SET 

TO AFV3 

OUTPUT 

WHEN SET TO 

AFV4 

OUTPUT 

WHEN SET 

TO AFV5 





5 Programmable Programmable Programmable SERIAL Programmable 

6 Programmable Programmable Programmable TRIP IC2 Programmable 


8 Programmable Programmable Programmable AUTO ALARM Programmable 



Where it says Programmable in the table above it means that the user can chose what is assigned 

to that relay from the list below: - 

Programmable = Not Used, Warn 1, Warn 2, Alarm, Indic 1 -5, 

Alarm FS, Trip FS, and Indic-1FS - 5FS, DCS Available 

Pre Set Outputs. (Those In Capitals Above) 

Close. 

On receiving a command to close the circuit breaker this output relay closes, thus sending a close 

signal to the corresponding circuit breaker on the appropriate Incomer. This signal remains closed 

until the relay is informed that the breaker has changed state. The relay determines the status of 

the breaker via the digital input "Circuit Breaker on IC#". Once the status of this digital input has 

changed the output relay opens. In the case where no change of breaker status is detected, the 

output relay remains closed until the time specified in the Breaker Fail Protection Function has 

elapsed. 

Close IC1. 

On receiving a command to close the circuit breaker this output relay closes, thus sending a close 

signal to the circuit breaker on the Incomer 1. This signal remains closed until the relay is 

informed that the breaker has changed state. The relay determines the status of the breaker via the 

digital input "Circuit Breaker on IC#". Once the status of this digital input has changed the output 

relay opens. In the case where no change of breaker status is detected, the output relay remains 

closed until the time specified in the Breaker Fail Protection Function has elapsed. 



Trip. 

This output is used to trip the circuit breaker and follows the same pattern as above. I.e. when a 

trip command is received the output relay closes and remains closed until the breaker is seen to 

open via the "Circuit Breaker on IC#" input or the time specified in the Breaker Fail Protection 

Function has elapsed. 

Serial. 

This is the close command to the Circuit Breaker that is activated through the serial link, i.e. a 

command from the DCS. If two seconds after a close command is given and the circuit breaker 

remains open then the Breaker Fail Protection function is activated. 

Trip IC1. 

This output is used to trip the circuit breaker on Incomer 1. If two seconds after a Trip command 

is given and the circuit breaker has not tripped then the Incomer 1 Breaker Fail Protection function 

is activated. 

Trip IC2. 

This output is used to trip the circuit breaker on Incomer 2. If two seconds after a Trip command 

is given and the circuit breaker has not tripped then the Incomer 2 Breaker Fail Protection function 

is activated. 

Auto. 

This output closes when an Auto Transfer is possible. 

Manual. 

This output closes when a Manual Transfer is possible. 

Auto Alarm. 

This output closes when an Auto Transfer Failure has occurred. 

Programmable Outputs. 

Not Used. 

This option switches off the use that particular output relay. 

Warn 1. 

This output relay is closed when a Protection Function with the Warn 1 option Enabled has had its 

trip value exceeded. This means that a trip or alarm is imminent once the trip delay has expired. 

Warn 2. 

This output relay is closed when a Protection Function with the Warn 2 option Enabled has had its 

trip value exceeded. This means that a trip or alarm is imminent once the trip delay has expired. 

Alarm. 

This output relay is activated when a Protection Function with the Alarm Enabled has tripped. 

Indicator 1-5 

These output relays are closed when a Protection Function with one of the Indicator 1-5 option 

Enabled has tripped. 



Alarm Fail-Safe. 

This output relay is the opposite of the alarm relay. It is used as a fail-safe option on the Advanced 

Feedervision II. 

Trip. 

This output relay is activated when a Protection Function with the Trip Enabled has tripped. 

Trip Fail-Safe. 

This output relay is the opposite of the trip relay. It is used as a fail-safe option on the Advanced 


Indicator 1-5 Fail-Safe. 

This output relay is the opposite of the Indicator 1-5 relays. It is used as a fail-safe option on the 

Advanced Feedervision II. 

DCS Available. 

This output indicates that the relay is able to follow commands from the DCS, through the serial 

port. 

14.5. Protection Settings 

In most of the Protection Functions there is the possibility to set the Trip Level and the Trip Time. 

When the Trip Level has been exceeded by an input to the Advanced Feedervision II a warning is 

given, if enabled. This means that a trip is imminent. Once the Trip level has been exceeded the 

Trip Time is used as a delay before a trip or alarm is called, depending upon how the function has 

been set up. 

14.5.1. Protection Features. 

In the Protection Functions there is the possibility to enable or disable the Features that follow. 

Function. 

When Enabled this setting activates the Protection Function associated with it. It also allows the 

user to set other parameters associated with the Protection Function such as the Trip Level and the 

Trip Delay. It also displays a 'tick' next to the Protection Function in the Protection Settings 

Screen on the relay to indicate to the user that the Protection Function is Enabled. When this is set 

to Disable the rest of the settings associated with the Protection Function, such as Trip Delay, is 

faded out and therefore cannot be set. 

Warn 1. 

When set to Enabled this setting activates the Output Relay that is programmed to Warn 1 

indicating that a trip is imminent after the trip time has been exceeded. It is activated when the 

Trip Level has been exceeded. 



Warn 2. 

When set to Enabled this setting activates the Output Relay that is programmed to Warn 2 

indicating that a trip is imminent after the trip time has been exceeded. It is activated when the 

Trip Level has been exceeded. 

Alarm. 

When set to Enabled this will call an alarm when the Trip Time is exceeded. This will then cause 

the Alarm Relay to change states, if one of the Output Relays is set to Alarm. It also displays an 

'A' next to the Protection Function in the Protection Settings Screen to indicate to the user that the 

Alarm option has been Enabled. When set to Disabled the Alarm for that Protection Function will 

not be called. 

Trip. 

When set to Enabled this will call a Trip when the Trip Time is exceeded. This will then cause the 

Trip Relay to change states, if one of the Output Relays is set to Trip. It also displays an 'T' next to 

the Protection Function in the Protection Settings Screen to indicate to the user that the Trip 

option has been Enabled. When set to Disabled the Trip for that Protection Function will not be 

called. 

Indicator 1. 

When set to Enabled this setting activates the Output Relay that is programmed to Indicator 1 

when the trip time is exceeded. 

Indicator 2. 



Indicator 3. 



Indicator 4. 



Indicator 5. 





Inhibit. 

When set to Enabled this setting inhibits any control function, such as open, close and auto 

transfer to operate. One disabled a control function can be carried out. 

Auto Reset. 

This option, when enabled, automatically resets the Fault when the situation that caused the trip 

has been removed. 

Panel-Reset. 

This option, when Enabled, allows a reset of a fault to be accomplished from the front panel of the 

relay when the situation that caused the trip has been removed. 

Serial-Reset. 

This option, when Enabled, allows a reset of a fault to be accomplished through the serial link of 

the relay when the situation that caused the trip has been removed. 

Note. 

When the Position of the relay is set to AFV 1, AFV 2, AFV 3 and AFV 5 all the features are 

shown. 

When the Position of the relay is set to AFV4 only the following protection features are used: 

Function, Alarm, Trip, Inhibit, Auto Reset, Panel Reset and Serial Reset. 



14.5.2. Protection Functions. 

There are 46 possible Protection Functions for the Advanced Feedervision II. The Functions used 

depends upon the position of the relay in the Auto Transfer Scheme. Each Function is given a 

function number, 1 to 45, so it is therefore easier to show which Protection Functions are assigned 

to which Position of the Advanced Feedervision II. 

Protection Functions Depending Upon Advanced Feedervision II Position Chosen. 

AFV1 AFV2 AFV3 AFV4 AFV 5 

1. Undervoltage. 25. Dead Bus. 1. Undervoltage. 25. Dead Bus. 25. Dead Bus 

2. Overvoltage. 26. Healthy Bus. 2. Overvoltage. 26. Healthy Bus. 38 Auto / Manual 

3. Earth Fault 1 HS. 3. Earth Fault 1 HS. 3. Earth Fault 1 HS. 13. Breaker Fail. 41 IC1 Breaker Fail 

4. Earth Fault 2 HS. 5. Earth Fault 1. 4. Earth Fault 2 HS. 14. Local / Remote. (3/4) 42. IC2 Breaker Fail 

5. Earth Fault 1. 7. Load Increase. 5. Earth Fault 1. 38. Auto / Manual. (5/6) 16 Buchholz Relay (13) 

6. Earth Fault 2. 8. Overcurrent 1. 6. Earth Fault 2. 12.Synchronisation. 17. Oil Temperature 

(14) 

7. Load Increase. 9. Overcurrent 2. 7. Load Increase. 39. Bus A VT Fuse. 18. Winding Temp(15) 

8. Overcurrent 1. 10. Low Set 

Overcurrent. 

8. Overcurrent 1. 40. Bus B VT Fuse. 19 MOGL Protection 

(16) 

9. Overcurrent 2. 11. Short Circuit. 9. Overcurrent 2. 41. IC1 Breaker Fail. 20 Control Supply 

10. Low Set 

Overcurrent. 

13. Breaker Fail. 10. Low Set 

Overcurrent. 

42. IC2 Breaker Fail. 44. AC Bus 

Undervoltage 

11. Short Circuit. 27. Buchholz Relay 11. Short Circuit. 43.Auto Changeover. 43. Auto Changeover 

1. (1) 

12.Synchronisation. 28. Buchholz Relay 12.Synchronisation. 23. Serial Timeout. 45 Bus VT Fuse 

2. (5) 

13. Breaker Fail. 29.Oil 

13. Breaker Fail. 24. Internal Error. 23.Serial Timeout 

Temperature1. (2) 

14. Local / Remote. 30 Oil Temperature 14. Local / Remote. 

24. Internal Error 

(3/4) 

2. (6) 

(3/4) 


(11) 

31. Winding Temp 

1. (3) 


(11) 

16. Buchholz Relay 

Protection.(12) 


2. (7) 

16. Buchholz Relay 


17. Oil 

Temperature 


33. MOGL 1. (4) 17. Oil 

Temperature 



Protection. (14) 

34. MOGL 2. (8) 18. Winding Temp 

Protection. (14) 

19. Xfmer PRDS 

(15) 

21. Trip Circuit 

Protection. 

19. Xfmer PRDS 

(15) 

20. Control Supply 

(17) 

35. AC Bus A. 20. Control Supply 

(17) 

21. Trip Circuit 

Protection. 

36. AC Bus B. 21. Trip Circuit 

Protection. 

22. Line VT Failure 

Protection. 

37. Breaker In 

Service 

22. Line VT Failure 

Protection. 

23. Serial Timeout. 23. Serial Timeout. 23. Serial Timeout. 

24. Internal Error. 24. Internal Error. 24. Internal Error. 

46. Emergency 

Transformer (5) 

46. Emergency 

Transformer(5) 

NOTE The inputs in italics are functions associated with text configurable inputs. 

The numbers in brackest refers to the corresponding digital inputs. 

The protection functions 1 to 46 are explained in detail in the next few pages. 



1. Undervoltage. 

Trip Level. 

This setting range 50-95% Vn in steps of 5% with default setting of 80% of line voltage 

determines the pick up level of the Undervoltage protection. When the measured voltages reaches 

this level for the period equal to the Time Delay period a trip will be performed. 

Time Delay. 

This setting range 0.5 to 5.0 seconds in steps of 0.1s with a default setting of 5s determines how 

long an Undervoltage condition is present before a trip occurs. 

2. Overvoltage. 

Trip Level. 

This setting range 105-150% Vn in steps of 5%, with a default setting of 120% of line voltage 

determines the pick up level for the Overvoltage function. When the measured voltage reaches 

this level and is maintained for the Time Delay an alarm or a trip will occur. 

Time Delay. 

This setting range 1-100 seconds in steps of 1 second, with a default setting of 1 second 

determines how long the Trip Level is exceeded before an alarm or a trip will occur. 

3. Earth Fault 1 High Set. 

Trip Level. 

This setting range 5-200% In in steps of 1%, with a default setting of 10% specifies the pickup 

level for the Earth Fault 1 High Set Function. When the measured voltage reaches this level and is 

maintained for the Time Delay an alarm or a trip will occur. 

Time Delay. 

This setting is used to select the time between an Earth Fault 1 High Set being registered and a trip 

signal being activated. The range is 0.1 to 2 Seconds, in steps of 0.1 second with a default setting 

of 0.5s. 



4. Earth Fault 2 High Set. 

This is only available if the relay is set to 2 Pole Operation in the Feeder Setting. 

Trip Level. 


level for the Earth Fault 2 High Set Function. When the measured voltage reaches this level and is 


Time Delay. 

This setting is used to select the time between an Earth Fault 2 High Set being registered and a trip 

signal being activated. The range is 0.1 to 2 Seconds, in steps of 0.1 second with a default setting 

of 0.5s. 

5. Earth Fault 1. 

Characteristic. 

This corresponds to a set of time curves (DEFT [Definite Time], NINV [Normally Inverse], VINV 

[Very Inverse] and EINV [Extremely Inverse]) that dictate the time delay to trip depending on the 

Earth Fault current and the characteristic chosen. This is used when co-ordinating and 

discriminating between faults on larger systems. See section 15 for more details. 

Trip Level. 


level for the Earth Fault 1 Function. When the measured voltage reaches this level and is 


Time Multiplier. 

This setting is available when the Characteristic is set to NINV, VINV or EINV. It refers to the 

value tI> used in the calculation of the Trip Time Curves in Section 15. This value when increased 

will Shift the Curves Up Vertically in the Trip Time Curves. (See Section 15 for more details.) 

The range is 0.1 to 10 in steps of 0.1, with a default value of 2. 

Time Delay. 

This setting is available when the Characteristic is set to DEFT. It is used to select the time 

between an Earth Fault 1 being registered and a trip signal being activated. The range is 0.1 to 120 

Seconds, in steps of 0.1 (0.1 to 1.0), 1s (1 to 10) and 10s (10 to 120) with a default setting of 0.5s. 



6. Earth Fault 2. 

This is only available if the relay is set to 2 Pole Operation in the Feeder Settings. 




earth fault current and the characteristic chosen. This is used when co-ordinating and 

discriminating between faults on larger systems. See section 15 for more details. 

Trip Level. 


level for the Earth Fault 2 Function. When the measured voltage reaches this level and is 







Time Delay. 


between an Earth Fault 2 being registered and a trip signal being activated. The range is 0.1 to 120 

Seconds, in steps of 0.1 (0.1 to 1.0), 1s (1 to 10) and 10s (10 to 120) with a default setting of 0.5s. 

7. Load Increase. 

Trip Level. 

Should the load on the breaker increase during operation the Advanced Feedervision II can sense 

this and signal a trip or alarm. The pick up level is adjustable between the range of 50% and 150% 

of CCR, in steps of 10%, and has a default setting of 120% of CCR. 

Time Delay. 

Linked to the load increase alarm this function can be pre-set to determine how long a Load 

Increase can occur before an alarm or trip will be signalled. It may be set between the range of 1 

and 120 seconds in steps of 1s, with a default value of 2 seconds. 



8. Overcurrent 1. 




overcurrent and the characteristic chosen. This is used when co-ordinating and discriminating 

between faults on larger systems. See section 15 for more details. 

Trip Level. 

This setting can be set between the range of 50 and 400% in steps of 10% of In to afford the user a 

faster tripping time for overcurrent conditions than that available from the overload curve. The 

default for this setting is 400% of In. 






Time Delay. 


between an Overcurrent 1 being registered and a trip signal being activated. The range is 0.1 to 

120 Seconds, in steps of 0.1 (0.1 to 1.0), 1s (1 to 10) and 10s (10 to 120) with a default setting of 

0.5s. 



9. Overcurrent 2. 




overcurrent and the characteristic chosen. This is used when co-ordinating and discriminating 

between faults on larger systems. See section 15 for more details. 

Trip Level. 

This setting can be set between the range of 50 and 400% in steps of 10% of In to afford the user a 

faster tripping time for overcurrent conditions than that available from the overload curve. The 

default for this setting is 400% of In. 






Time Delay. 


between an Overcurrent 2 being registered and a trip signal being activated. The range is 0.1 to 

120 Seconds, in steps of 0.1 (0.1 to 1.0), 1s (1 to 10) and 10s (10 to 120) with a default setting of 

0.5s. 

10. Low Set Overcurrent. 

Trip Level. 

This setting can be set between the range of 150 and 1000% in steps of 50% of In to afford the 

user a faster tripping time for overcurrent conditions than that available from the overload curve. 

The default for this setting is 400% of In. 

Time Delay. 

This setting determines the time of the delay between the unit registering a low set overcurrent 

and an alarm or trip being signalled. The range is 0.1 to 5.0 Seconds, in steps of 0.1s. 



11. Short Circuit. 

Trip Level. 

This setting can be set between the range of 400% and 2000% in steps of 50% of In to afford the 

user a faster tripping time for overcurrent conditions than that available from the overload curve. 

The default for this setting is 400% of In. 

Time Delay. 

This setting determines the time of the delay between the unit registering a short circuit and an 

alarm or trip being signalled. The range is 0.1 to 5.0 Seconds, in steps of 0.1s. 

12. Synchronisation. 

Max Angle. 

This determines the maximum allowable angle between the incomer voltage and the bus coupler 

voltage for a transfer to be accomplished. If the angle is greater than that specified an alarm will 

be called instantly. This value has a setting of 2° to 30° in 1° steps. 

Time Delay. 

This determines the time that the incomer voltage and the buscoupler voltage have to be in 

synchronisation before the Advanced Feedervision II will state that they are in synchronisation. 

This has a setting of 0.1 to 5 second in 0.5 second steps. 

Voltage Difference. 

This determines the maximum voltage difference between the incomer voltage and the bus 

coupler voltage for a transfer to be accomplished. If the voltage is greater than that specified an 

alarm will be called instantly. This value has a setting of 1% to 20% in steps of 1%. 

13. Breaker Fail. 

Time Delay. 

This setting determines the time of the delay between the unit registering a breaker fail (the circuit 

breaker is not responding to commands given by the Advanced Feedervision II) and an alarm or 

trip being signalled. The range is 0.5 to 10.0 Seconds, in steps of 0.1s. 

14. Local Remote. 

Time Delay. 

This setting determines the time of the delay between the unit registering a Local / Remote error 

(the Local digital input is in the same state as the Remote digital input) and an alarm or trip being 

signalled. The range is 0.1 to 1.0 Seconds, in steps of 0.1s. 



15. MREF Relay Protection. 

Time Delay. 

This setting determines the time of the delay between the unit registering an alarm or trip on the 

MREF relay and an alarm or trip being signalled on the Advanced Feedervision II. The range is 

0.1 to 1.0 Seconds, in steps of 0.1s. 

16. Buchholz Relay Protection. 

Time Delay. 


associated Buchholz relay and an alarm or trip being signalled on the Advanced Feedervision II. 

The range is 0.1 to 1.0 Seconds, in steps of 0.1s. 

17. Oil Temperature Protection. 

Time Delay. 


associated Oil Temperature relay and an alarm or trip being signalled on the Advanced 

Feedervision II. The range is 0.1 to 1.0 Seconds, in steps of 0.1s. 

18. Winding Temperature Protection. 

Time Delay. 


associated Winding Temperature relay and an alarm or trip being signalled on the Advanced 


19. PRDS Protection. 

Time Delay. 


associated PRDS relay (Transformer Oil Pressure relay) and an alarm or trip being signalled on 

the Advanced Feedervision II. The range is 0.1 to 1.0 Seconds, in steps of 0.1s. 

20. Control Supply Protection. 

Time Delay. 

This setting determines the time of the delay between the unit registering a tripped input on the 

Control Supply input (which registers a trip should the voltage to the digital inputs drop off) and 

an alarm or trip being signalled on the Advanced Feedervision II. The range is 0.1 to 1.0 Seconds, 

in steps of 0.1s. 



21. Trip Circuit Protection. 

Time Delay. 


Trip Circuit relay and an alarm or trip being signalled on the Advanced Feedervision II. The range 

is 0.1 to 1.0 Seconds, in steps of 0.1s. 

22. Line VT Failure Protection. 

Time Delay. 


Line VT relay and an alarm or trip being signalled on the Advanced Feedervision II. The range is 

0.1 to 1.0 Seconds, in steps of 0.1s. 

23. Serial Timeout Protection. 

Time-out Delay. 

This setting range 5 to 120 seconds in steps of 1 second, with a default setting of 5 second 

determines the maximum period of time in which a relay is not communicated with through the 

serial link. After the set time a trip or alarm is called indicating that there must be fault in the 

communication link or with the Hardware that is communicating to the Advanced Feedervision II. 

24. Internal Error Protection. 

Internal Error. 

This feature can trip the motor if an error occurs on the hardware or software of the Advanced 


25. Dead Bus Protection. 

Trip Level. 


the Bus as being in an Unhealthy or Dead state. The range is from 15% to 50% in steps of 5%. 

Time Delay. 


Dead Bus Protection and an alarm or trip being signalled on the Advanced Feedervision II. The 

range is 0.5 to 5.0 Seconds, in steps of 0.1s. 



26. Healthy Bus Protection. 

Trip Level. 


the Bus as being in a Healthy state. The range is from 50% to 95% in steps of 5%. 

Time Delay. 


Healthy Bus Protection and an alarm or trip being signalled on the Advanced Feedervision II. The 


27. Buchholz Relay 1 Protection. 

Time Delay. 


Buchholz Relay on the Incomer 1 Transformer and an alarm or trip being signalled on the 

Advanced Feedervision II. The range is 0.1 to 1.0 Seconds, in steps of 0.1s. 

28. Buchholz Relay 2 Protection. 

Time Delay. 


Buchholz Relay on the Incomer 2 Transformer and an alarm or trip being signalled on the 


29. Oil Temperature 1 Protection. 

Time Delay. 


Oil Temperature on the Incomer 1 Transformer and an alarm or trip being signalled on the 


30. Oil Temperature 2 Protection. 

Time Delay. 


Oil Temperature on the Incomer 2 Transformer and an alarm or trip being signalled on the 




31. Winding Temperature 1 Protection. 

Time Delay. 


Winding Temperature on the Incomer 1 Transformer and an alarm or trip being signalled on the 


32. Winding Temperature 2 Protection. 

Time Delay. 


Winding Temperature on the Incomer 2 Transformer and an alarm or trip being signalled on the 


33. MOGL 1 Protection. 

Time Delay. 


MOGL on the Incomer 1 Transformer and an alarm or trip being signalled on the Advanced 


34. MOGL 2 Protection. 

Time Delay. 


MOGL on the Incomer 1 Transformer and an alarm or trip being signalled on the Advanced 


35. AC Bus A Protection. 

Time Delay. 


AC Bus A Undervoltage Relay and an alarm or trip being signalled on the Advanced Feedervision 

II. The range is 0.1 to 1.0 Seconds, in steps of 0.1s. 

36. AC Bus B Protection. 

Time Delay. 


AC Bus B Undervoltage Relay and an alarm or trip being signalled on the Advanced Feedervision 

II. The range is 0.1 to 1.0 Seconds, in steps of 0.1s. 



37. Breaker In Service Protection. 

This is used to indicate that the Bus Coupler Circuit Breaker is in Service or Test. An Alarm or 

Trip will be called if the Circuit Breaker is in the Test Position. 

38. Auto/Manual Protection. 

Time Delay. 

This setting determines the time of the delay between the unit registering an Auto / Manual error 

(the Auto digital input is in the same state as the Manual digital input) and an alarm or trip being 

signalled. The range is 0.1 to 1.0 Seconds, in steps of 0.1s. 

39. Bus A VT Fuse Protection. 

Time Delay. 


Bus A VT Fuse Protection and an alarm or trip being signalled on the Advanced Feedervision II. 


40. Bus B VT Fuse Protection. 

Time Delay. 


Bus B VT Fuse Protection and an alarm or trip being signalled on the Advanced Feedervision II. 


41. IC1 Breaker Fail Protection. 

Time Delay. 


Incomer 1 Breaker Fail Protection and an alarm or trip being signalled on the Advanced 


42. IC2 Breaker Fail Protection. 

Time Delay. 


Incomer 2 Breaker Fail Protection and an alarm or trip being signalled on the Advanced 




43. Auto Changeover Protection. 

This will call a Trip or Alarm in the case of an Auto Transfer Failure, i.e. when the Auto Transfer 

has failed for any reason. 

44. Bus VT Fuse. 

Time Delay 


Bus VT Fuse Protection and an alarm or trip being signalled on the Advanced Feedervision II. The 


45. AC Bus Undervoltage 

Time Delay 


AC Bus Undervoltage Relay and an alarm or trip being signalled on the Advanced Feedervision II. 


46. Emergency Transformer 

Time Delay 


Emergency Transformer and an alarm or trip being signalled on the Advanced Feedervision II. 


14.5. Unit Settings. 

In the Unit Settings of the Advanced Feedervision II many of the parameters shown are not for 

setting, some are for providing information to the user. They are as follows: - 

Software Version. 

This displays the software version running on the relay as well as a software date for that version. 

Unit ID. 

This shows the serial number of the relay. This serial number should be quoted along with the 

software version when corresponding to P&B Engineering about the relay. 

Password. 

The Advanced Feedervision II provides a password for security, which can be Enabled or 

Disabled. When Enabled the user must enter the Password when they wish to enter the setting part 

of the Advanced Feedervision II's menu. This is not the password that allows the changing of the 

Position. That password is always Enabled and cannot be changed. 



Change Password. 

When first used the Advanced Feedervision II has a default password of 'BB'. It is recommended 

for security that the password be changed. This is done by selecting the Change Password Screen. 

The user is then able to enter a password of up to 5 characters in length. The characters A-Z being 

available for the user to choose for their password. 

Customise Strings. 

Although this setting can be set in the unit setting it refers to a setting that is with regards to the 

Digital Inputs (See Section 14.3) 

LCD Backlight and LCD Contrast. 

These functions allow the user to change the display contrast and backlight. 

Set Default Page. 

This allows the user to define which of the Measured Values are displayed on the screen of the 

relay when the relay defaults after the Default Return Time (See below). The options available 

are:- 

I1, I2, I3 

Ie, Istby (Just Ie if 3 Pole Overcurrent is chosen). 

Pwr1, Pwr2, Pwr3 

PF1, PF2, PF3 

V1, V2, V3 

V12, V23, V31 

The value shown in the default screen is set by selecting the chosen Measured Value, using the 

DISPLAY SCROLL button, on the main screen. Then going to this setting and pressing the 

SELECT button it will save the chosen input. 

Default Return Time. 

If the Motorvision is not being accessed using the buttons on the front of the relay after a 

predetermined time the relay will default to the Initial Screen. If you are accessing the relay you 

will not want it to default to another Screen when your back is turned. In this setting you can 

control that feature. You are able to switch off the return feature or specify a time of 1,2,4 or 8 

minutes for the delay before the return to the Initial Screen. 

User Calibration 

This is used to calibrate the relay and is only used at the factory. If a customer wishes to recalibrate 

the relay they should contact P&B Engineering. 



15. Long Time Inverse Overcurrent Relay. 

This time curves (DEFT [Definite Time], NINV [Normally Inverse], VINV [Very Inverse] and 

EINV [Extremely Inverse]) dictate the time delay to trip depending on the current and the 

characteristic chosen. This is used when co-ordinating and discriminating between faults on larger 

systems. 

15.1 Inverse Time Phase Overcurrent Relay. 

Characteristics according to IEC 255-4 or BS 142 

Normal Inverse t = 0.14 tI> [s] 

(I/Is)0.02 - 1 

Very Inverse t = 13.5 tI> [s] 

(I/Is) - 1 

Extremely Inverse t = 80 tI> [s] 

(I/Is)2 - 1 

Where: t = Tripping Time 

tI> = Time Multiplier 

I = Fault Current 

Is = Inverse Time Overcurrent Pickup 



15.2. Inverse Time Characteristics. 

Normal Inverse. 

Extremely Inverse. 

Very Inverse. 

Definite Time. 

9 



16. Auto Transfer Scheme. 

16.1. Auto Transfer Scheme. 

The scheme is based on an arrangement of two incoming feeders and one bus coupler and allows 

for; auto changeover in the case of an undervoltage fault on one of the incomers and also for 

manual momentary paralleling. 

Before the development of the Advanced Feedervision II the only way to accomplish an Auto 

Transfer Scheme was to utilise up to thirty different relays, each one accomplishing a single task 

required for the Scheme. 

16.2. Auto Transfer Scheme Using Advanced Feedervision II Relays. 

The Auto Transfer Scheme using Advanced Feedervision II Relays has been developed by P&B 

Engineering to meet the general requirements of Reliance Industries Ltd. (India) and is based on 

the EXXON standard. 

The functions of the Advanced Feedervision II Relays are fully field programmable and therefore 

the requirements of other schemes can be met as required. 

The scheme as above is realised using four Advanced Feedervision II Relays as shown in the 

diagram on the next page. 

A more simplified Auto Transfer Scheme can be realised with just three Advanced Feedervision 

IIs, those in Position AFV1, AFV3 and AFV5. It is only recommended for certain schemes and 

will not be explained in detail in this manual. 

16.3 Incomer 1 Protection, Position AFV1. 

Two Advanced Feedervision II Relays are used, AFV1 and AFV3, one on each incoming feeder, 

for; breaker control and monitoring, protection, undervoltage detection and incorporation of 

external plant signals. Trip and alarm signals from upstream protection devices associated with 

the HV circuit and / or transformer such as Buchholz and Restricted Earth Fault relays are handled 

by these relays. These Advanced Feedervision II Relays can act as a lockout for the upstream 

protection devices connected as digital inputs. 

The Advanced Feedervision II set to Position AFV1 is used to protect Incomer 1. 

16.4. Incomer 2 Protection, Position AFV3. 

This is the second Advanced Feedervision II to be used for protecting the incoming feeder. This 

relay is used to protect Incomer 2. 



TR 

3 

L 

MSP-EF 

MSP-REF 

THE 

AUTO 

TRANSFER 

SCHEME 

MSP-EF 

MSP-REF 

L 

3 

TR 

11 

11 

AFV 1 AFV 3 

3 

16 

UNDERVOLTAGE INCOMER 2 

WARN 1 

3 

WARN 1 

UNDERVOLTAGE INCOMER 1 

16 

OPEN/CLOSE 

ON / 

IN SERVICE 

TRIP/ 

CLOSE 

23/22 

10/8 

9/7 

INDIC 3 

12 

19/20 

PROTECTION OPERATED IC1 

ON/IN SERVICE 

ON / IN SERVICE 

AUTO 

MANUAL 

SWITCH 

TRIP 

SELECTOR 

SWITCH 

PROTECTION 

OPERATED 

IC2 

12 

19/20 

INDIC 3 

TRIP/ 

CLOSE 

9/7 10/8 

23/22 

OPEN/CLOSE 

ON/IN 

SERVICE 

C.B. 

TRIP 

ON/IN SERVICE 

WARN 2 

BUS A VOLTAGE >80% 

9/7 TRIP 5/6 13 

16 

IC1 /14 

BUS A VOLTAGE


16.5. Bus Coupler Protection, Position AFV2. 

The Advanced Feedervision II Relay in Position AFV2 is used, on the bus coupler for; protection, 

dead bus detection (On Bus A) and check synchronisation. 

16.6 Bus Coupler Controller, Position AFV4. 

The Advanced Feedervision II Relay in Position AFV4 operates as a controller which; provides 

breaker control and monitoring for healthy bus (On BUS B) and the bus coupler circuit breaker, 

marshals the signals from the other three relays, provides the timing functions and interfaces to the 

local manual control switches. 

16.7. Scheme operation. 

In the case of one incomer being under voltage the associated incomer circuit breaker is opened 

and the bus coupler circuit breaker is closed. After a time delay, which allows for load shedding, 

both sets of outgoing feeders (Bus A and B) are fed from the same incomer. All the required 

functions including; the time delays to allow for load shedding, the check sync. function, the dead 

bus detection and incorporation of signals from upstream protection devices are handled by the 

Advanced Feedervision II Relays. 

In the case of both incomers under voltage the Advanced Feedervision II relays detect a system 

undervoltage and neither incomer circuit breaker is opened and the bus coupler circuit breaker 

remains open. 

To return to the normal condition, of both incomer circuit breakers being closed and the bus 

coupler circuit breaker being open, or one of the incomers being taken out of service for 

maintenance, manual momentary paralleling is used. In this case the circuit breaker that is open is 

closed and one of the remaining two is opened after a delay. All the required functions including; 

the time delays, the check sync. function, the dead bus detection and incorporation of signals from 

Auto / Manual and trip selector switches are handled by the Advanced Feedervision II Relays. 

Conclusion. 

The P&B Advanced Feedervision II Relay provides an integrated solution to the protection, 

control and monitoring of Low Voltage feeders. Its sophisticated control functions allow complex 

auto transfer schemes to be realised with few external devices. The Advanced Feedervision II 

Relays integrates many functions that were previously achieved using separate protection devices 

and control products connected as a system. Advanced Feedervision II Relays used in the above 

auto transfer scheme eliminate the cost of separate protection devices and control products.

ADVANCED FEEDERVISION 2 (AFV2) Technical ... - PBSI Group Ltd

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