Sepam series 20 Sepam series 40 - POWERLAB

Electrical network protection 

Sepam series 20 


Catalogue 

2004

Contents 

Presentation 2 

More solutions 2 

Flexible architecture 5 

User-machine interface 6 

Selection table 8 

Sepam series 20 8 


Metering 10 

Description 10 

General settings and characteristics 11 

Protection 12 


Setting ranges 15 

Connection diagrams 18 



Phase current inputs 20 

Residual current input 21 

Sepam series 20 voltage inputs 22 

Sepam series 40 voltage inputs 23 

Control and monitoring 24 


Logic inputs and outputs 25 

Logic input / output assignment for Sepam series 20 26 

Logic input / output assignment for Sepam series 40 27 

Annunciation 28 

Customization 29 

Communication 30 

Description and characteristics 30 

Optional remote modules 32 


Connections 33 

Sensors 34 

LPCT type current sensors 34 

Core balance CTs 35 

Characteristics 36 

Size and weight 36 

Electrical characteristics 38 

Environmental characteristics 39 

Order form 41 

Breakdown of base units into basic references 41 

Order form 42 

1

Presentation 

More solutions 

MT11017 

MT11017 

The Sepam series 20 and Sepam series 

40 families of protection and metering units 

are designed for the operation of machines 

and electrical distribution networks of 

industrial installations and utility substations 

for all levels of voltage. 

They consist of complete, simple and 

reliable solutions, suited to the following 

applications: 

b protection of substations (incomers and 

feeders) 

b protection of transformers 

b protection of motors 

b protection of generators 

b protection of busbars. 


Suitable for common applications, Sepam series 20 offers simple solutions 

based on current or voltage metering. 

b protection of substation incomers and feeders against phase-to-phase and 

phase-to-earth short-circuits 

v 16 IDMT tripping curves 

v adjustable timer hold to detect recurrent faults 

v switching of groups of settings to adapt to changes in the network configuration 

b protection of overhead lines with built-in recloser function 

b protection of transformers against overloads, with ambient temperaturecompensated 

RMS thermal overload protection with 2 groups of settings for different 

ventilation operating rates 

b protection of motors 

v against overloads, with ambient temperature-compensated RMS thermal overload 

protection with a cold tripping curve that can be adjusted to fit motor characteristics 

v against internal faults and load-related faults 

v with motor starting condition monitoring and machine operation assistance. 

The Sepam series 20 B21 and B22 voltage units are suitable for the following 

situations: 

b monitoring of network voltage and frequency 

b loss of mains detection by rate of change of frequency protection for installations 

with local power generation. 


Sepam series 40, with its current and voltage metering capabilities, offers highperforming 

solutions for more demanding applications. 

Sepam series 40 units perform the following funcitons in addition to those performed 

by Sepam series 20: 

b protection of closed ring networks or networks with parallel incomers, by 

directional protection 

b directional earth fault protection suitable for all earthing systems: impedant, 

isolated or compensated neutral 

b protection of networks with variable configurations requiring the switching of 

groups of settings and logic discrimination 

b all the necessary electrical measurements: phase and residual currents, phase-toneutral, 

phase-to-phase and residual voltage, frequency, power and energy, ... 

b comprehensive network diagnosis assistance: 20 seconds of disturbance 

recording, detailed history of the last 200 alarms, storage of the last 5 tripping 

contexts 

b adaptation of control functions by a logical equation editor 

b customization of alarm messages to fit each application, and/or in the user’s 

language. 

Sepam selection guide 

Selection Series 20 Series 40 

criteria 

Measurements I U U I and U I and U I and U 

Specific 

protection 

functions 

available 

Applications 

Type 

Loss of 

mains 

(ROCOF) 

Directional 

earth fault 

Directional 

earth fault and 

phase 

overcurrent 

Substation S20 S40 S41 S42 

Transformer T20 T40 T42 

Motor M20 M41 

Generator 

G40 

Busbar B21 B22 

Example: For motor protection and current and voltage measurements, your solution 

is the M41 type Sepam. 

2

Presentation 


PE50239 

PE50240 

Example: Advanced UMI customized for Chinese users. 

More simplicity 

Simple to install 

b no constraints for integration in cubicles due to the compact size of the base units 

and remote installation of optional modules 

b universal auxiliary power supply. 

Simple to commission 

b all the functions are ready to use 

b user-friendly, powerful PC setting software to utilize all the possibilities offered by 

Sepam. 

Simple to operate 

With the advanced UMI, all local operations are made easier by a clear, complete 

presentation of all the required information in your language. 

Simple to maintain 

b digital unit self-diagnosis and watchdog 

b switchgear diagnosis assistance functions to assess equipment condition and 

schedule preventive maintenance operations: 

v cumulative breaking current 

v breaking device operating and charging time. 

Example: Standard advanced UMI in English. 

MT11019 

PE50027 

PE50028 

Supervision of an electrical network equipped with Sepam by 

means of PowerLogic System SMS software. 

More communication 

Modbus communication 

All the data needed for centralized management of your electrical network are 

available with the communication option based on the open, international Modbus 

protocol: 

b measurement and diagnosis values 

b remote indication and time-tagging of events 

b remote control of the installation 

b remote setting of protection functions 

b reading of disturbance recording files. 

Ethernet connection and Webserver 

Sepam may be connected to an Ethernet high speed network by means of a 

Modbus-RS 485/Modbus - Ethernet TCP/IP communication interface. 

This interface allows: 

b integration of Sepam in a multi-master architecture on Ethernet networks 

b consultation of Web pages of data transmitted by Sepam via an Internet/Intranet 

browser. 

Other protocols 

Sepam may be connected to communication network based on protocols other than 

Modbus by using a gateway / protocol converter. 

In particular, a Modbus / DNP3 converter has been qualified for the connection of 

Sepam to DNP3 network. 

Please consult us for more informations. 

PowerLogic System 

Sepam fits naturally into PowerLogic System power management systems. 

EGX200 Ethernet gateway. 

3

Presentation 


More modularity 

Sepam series 20 and Sepam series 40 are available with 2 User-Machine 

Interface (UMI) levels: 

b advanced UMI, with keypad and graphic LCD display 

v to provide all the data required for local operation of the installation: 

measurements, diagnosis information, alarms, etc. 

v to set Sepam parameters and protection functions 

v to be understood by all, the screens can be displayed in the user’s language. 

The advanced UMI may be part of the base unit or installed as a remote unit in the 

most convenient location for the user. 

b basic UMI, with signal lamps 

v for remotely operated installations, via the communication link, with no continuous 

need for local operation; a PC equipped with the SFT2841 software tool may be used 

for occasional operation. 

In order to adapt to as many situations as possible and allow for subsequent 

upgrading of the installation, Sepam may be functionally enhanced at any time 

by the addition of optional modules. 

b logic input/output module with parameterizable program logic 

b communication module 

b temperature sensor module 

b analog output module. 

PE50241 

PE50242 

Sepam with basic UMI. 

Sepam with advanced UMI. 

PE50243 

Sepam with remote advanced UMI. 

4

Presentation 

Flexible architecture 

PE50244 

1 Base unit, with different User-Machine Interface (UMI) levels: 

b basic UMI 

b advanced UMI with fixed or remote graphic LCD display. 

2 Logic inputs/outputs module. 

3 Modbus communication network connection module. 

4 Low level analog output module. 

5 Temperature sensor acquisition module for transformer, motor or 

generator. 

6 Software tools: 

b Sepam parameter and protection setting and program logic customization 

b display of disturbance recording files. 

5

Presentation 

User-machine interface 

MT10122 

Sepam has 2 levels of UMI (user-machine 

interface) suited to every operating 

requirement. 

on 

I>51 

I >> 51 

Io > 51N 

Io >> 51N 

ext 

0 off I on Trip 

reset 

Basic UMI 

This UMI offers an economical solution suited to installations that do not require local 

operation (managed by a remote monitoring and control system) 

or to replace electromechanical or analog electronic protections units with no 

additional operating needs. 

The basic UMI includes: 

b 2 signal lamps indicating Sepam operating status: 

v green "on" indicator: device on 

v red "wrench" indicator: device unavailable (initialization phase or detection of an 

internal failure) 

b 9 parameterizable yellow signal lamps equipped with a standard label (1) 

b "reset" button for clearing faults and resetting 

b 1 connection port for the RS 232 link with the PC; the port is protected by a sliding 

cover. 

DE50595 

Basic UMI with standard signal lamp assignment. 

on 

9 

I>51 

I> > 51 

8 

Io > 51N 

7 

Io >> 51N 

Advanced UMI with standard signal lamp assignment. 

ext 

I1 = 162A RMS 

I2 = 161A RMS 

I3 = 163A RMS 

6 

clear 

5 

0 off 

I on 

reset 

4 

trip 

1 

2 

3 

Advanced UMI 

This UMI is an optimal solution for local operation, which is made easier by its 

legibility, content and access to the different data. 

In addition to the basic UMI functions, this version provides: 

b a "graphic" LCD display with automatic contrast adjustment and user-triggered 

backlighting. It is used to display measurements, parameter/protection settings and 

alarm and operating messages. 

Number of lines, size of characters and symbols according to screens and language 

versions. 

b a 9-key keypad with two operating modes: 

White keys for current operation: 

1 display of measurements. 

2 display of switchgear and network diagnosis data. 

3 display of alarm messages. 

4 resetting. 

5 acknowledgment and clearing of alarms. 

Blue keys for parameter and protection setting: 

7 

8 

9 

access to protection settings. 

access to Sepam parameter settings (2) . 

used to enter the 2 passwords required to change protection and parameter 

settings. 

The " ↵, r, " keys ( 4 , 5 , 6 ) are used to navigate in the menus, and to scroll 

and accept the values displayed. 

"Lamp test" key 6 : 

switching-on sequence of all the signal lamps. 

r 

Remote advanced UMI 

The advanced UMI functions are also available in a remote module that is connected 

to a Sepam with a basic UMI (connection by prefabricated cord of different lengths). 

The module is installed on the front panel of the cubicle in the most appropriate 

operating location. 

(1) This removable label may be replaced by a customized label produced using the SFT2841 

software tool. 

(2) For parameter setting of the program logic, the expert UMI must be used. 

6

Presentation 

User-machine interface 

MT11102 

MT11103 

SFT2841: measurement screen. 

SFT2841: protection function 50/51 setting screen. 

Expert UMI 

This UMI is available as a complement to the basic or advanced UMI on the screen 

of a PC equipped with the SFT2841 software tool and connected to the RS 232 link 

on the front panel of the Sepam (operating in a Windows environment). 

All the data used for the same task are grouped together in the same screen to 

facilitate operation. Menus and icons are used for fast, direct access to the required 

information. 

Current operating mode 

This UMI is the solution suited to occasional local operation for demanding personnel 

who require fast access to all the information. 

b display of all metering and operating data 

b display of alarm messages with the time of appearance 

b display of diagnosis data such as: 

v tripping current 

v number of switchgear operations and cumulative breaking current 

b display of all protection and parameter settings made 

b display of the logic status of inputs, outputs and signal lamps. 

Parameter / protection setting mode 

Used for the display and setting of all the parameters; input data may be prepared 

ahead of time and transferred into the corresponding Sepam units in a single 

operation (downloading function). 

Main functions performed by SFT2841: 

b changing of passwords 

b entry of general settings (ratings, integration period, …) protected by a parameter 

setting password 

b entry of protection settings in the same page, protected by a setting password 

b modification of program logic assignments 

b enabling/disabling of functions 

b saving of files. 

Saving - printing of reports 

b protection and parameter setting data may be saved 

b reports may also be printed, by exporting the data into a text file. 

This UMI may also be used to recover disturbance recording files and display them 

using the SFT2826 software tool. 

Operating assistance 

Access from all the screens to a help section which contains all the technical data 

required for Sepam installation and use. 

SFT2841 kit 

The expert UMI software tool comes in a kit which contains: 

b 1 CD-ROM with: 

v SFT2841 software 

v SFT2826 software for disturbance recording file display 

b 1 PC/Sepam serial link cord. 

Minimum configuration required 

Processor 

PC compatible, Pentium 133 MHz 

Operating systems 

Microsoft Windows 98/NT4.0/2000/XP 

RAM 64 MB (32 MB for Windows 98) 

Space on disk 

64 MB 

7

Selection table Sepam series 20 

Functions 

Type of Sepam 

Substation Transformer Motor Busbar 

Protection ANSI code S20 T20 M20 B21 (3) B22 

Phase overcurrent 50/51 4 4 4 

Earth fault, 

sensitive earth fault 

50N/51N 

50G/51G 

4 4 4 

Negative sequence / unbalance 46 1 1 1 

Thermal overload 49RMS 2 2 

Phase undercurrent 37 1 

Locked rotor, excessive starting time 48/51LR/14 1 

Starts per hour 66 1 

Positive sequence undervoltage 27D/47 2 2 

Remanent undervoltage 27R 1 1 

Phase-to-phase undervoltage 27 2 2 

Phase-to-neutral undervoltage 27S 1 1 

Phase-to-phase overvoltage 59 2 2 

Neutral voltage displacement 59N 2 2 

Overfrequency 81H 1 1 

Underfrequency 81L 2 2 

Rate of change of frequency 81R 1 

Recloser (4 cycles) 79 v 

Thermostat / Buchholz 26/63 v 

Temperature monitoring (8 RTDs, 2 set points per RTD) 38/49T v v 

Metering 

Phase current I1, I2, I3 RMS, residual current I0 b b b 

Average current I1, I2, I3, peak demand current IM1, IM2, IM3 b b b 

Voltage U21, U32, U13, V1, V2, V3, residual voltage V0 b b 

Positive sequence voltage Vd / rotation direction b b 

Frequency b b 

Temperature v v 

Network and machine diagnosis 

Tripping current TripI1, TripI2, TripI3, TripI0 b b b 

Unbalance ratio / negative sequence current Ii b b b 

Disturbance recording b b b b b 

Thermal capacity used b b 

Remaining operating time before overload tripping b b 

Waiting time after overload tripping b b 

Running hours counter / operating time b b 

Starting current and time 

b 

Start inhibit time delay, number of starts before inhibition 

b 

Switchgear diagnosis 

Cumulative breaking current b b b 

Trip circuit supervision v v v v v 

Number of operations, operating time, charging time v v v 

Control and monitoring 

ANSI code 

Circuit breaker / contactor control (1) 94/69 v v v v v 

Latching / acknowledgment 86 b b b b b 

Logic discrimination 68 v v v 

Switching of groups of settings b (2) b (2) b (2) 

Annunciation 30 b b b b b 

Additional modules 

8 temperature sensor inputs - MET148-2 module v v 

1 low level analog output - MSA141 module v v v v v 

Logic inputs/outputs - MES114/MES114E/MES114F (10I/4O) module v v v v v 

Communication interface - ACE949-2 (2-wire RS 485), 

v v v v v 

ACE959 (4-wire RS 485) or ACE937 (fiber optic) 

b standard, v according to parameter setting an MES114/MES114E/MES114F or MET148-2 input/output module options. 

(1) For shunt trip unit or undervoltage trip unit. 

(2) Exclusive choice between logic discrimination and switching from one 2-relay group of settings to another 2-relay group. 

(3) Performs B20 type functions. 

8

Selection table Sepam series 40 

Functions 

Type of Sepam 

Substation Transformer Motor Generator 

Protection ANSI code S40 S41 S42 T40 T42 M41 G40 

Phase overcurrent 50/51 4 4 4 4 4 4 4 

Voltage-restrained phase overcurrent 50V/51V 1 

Earth fault, 

50N/51N 4 4 4 4 4 4 4 

sensitive earth fault 

50G/51G 

Breaker failure 50BF 1 1 1 1 1 1 1 

Negative sequence / unbalance 46 2 2 2 2 2 2 2 

Directional phase overcurrent 67 2 2 

Directional earth fault 67N/67NC 2 2 2 2 

Directional active overpower 32P 1 1 1 1 

Directional reactive overpower 32Q/40 1 1 

Thermal overload 49RMS 2 2 2 2 

Phase undercurrent 37 1 

Excessive starting time, locked rotor 48/51LR/14 1 

Starts per hour 66 1 

Positive sequence undervoltage 27D 2 

Remanent undervoltage 27R 1 

Undervoltage (3) 27/27S 2 2 2 2 2 2 2 

Overvoltage (3) 59 2 2 2 2 2 2 2 

Neutral voltage displacement 59N 2 2 2 2 2 2 2 

Negative sequence overvoltage 47 1 1 1 1 1 1 1 

Overfrequency 81H 2 2 2 2 2 2 2 

Underfrequency 81L 4 4 4 4 4 4 4 

Recloser (4 cycles) 79 v v v 

Temperature monitoring (8 or 16 RTDs, 2 set points per RTD) 38/49T v v v v 

Thermostat / Buchholz 26/63 v v 

Metering 

Phase current I1, I2, I3 RMS, residual current I0 b b b b b b b 

Average current I1, I2, I3, peak demand current IM1, IM2, IM3 b b b b b b b 

Voltage U21, U32, U13, V1, V2, V3, residual voltage V0 b b b b b b b 

Positive sequence voltage Vd / rotation direction, neg. seq. voltage Vi b b b b b b b 

Frequency b b b b b b b 

Active, reactive and apparent power P, Q, S 

b b b b b b b 

Peak demand power PM, QM, power factor 

Calculated active and reactive energy (±W.h, ±var.h) b b b b b b b 

Active and reactive energy by pulse counting (±W.h, ±var.h) v v v v v v v 

Temperature v v v v 

Network and machine diagnosis 

Tripping context b b b b b b b 

Tripping current TripI1, TripI2, TripI3, TripI0 b b b b b b b 

Unbalance ratio / negative sequence current Ii b b b b b b b 

Phase displacement ϕ0, ϕ1, ϕ2, ϕ3 b b b b b b b 

Disturbance recording b b b b b b b 

Thermal capacity used b b b b 

Remaining operating time before overload tripping b b b b 

Waiting time after overload tripping b b b b 

Running hours counter / operating time b b b b 

Starting current and time 

b 

Start inhibit time delay, number of starts before inhibition 

b 

Switchgear diagnosis 

Cumulative breaking current b b b b b b b 

Trip circuit supervision v v v v v v v 

Number of operations, operating time, charging time v v v v v v v 

CT/VT supervision 60FL b b b b b b b 


ANSI code 

Circuit breaker / contactor control (1) 94/69 b b b b b b b 

Latching / acknowledgment 86 b b b b b b b 

Logic discrimination 68 v v v v v v v 

Switching of groups of settings b b b b b b b 

Annunciation 30 b b b b b b b 

Logic equation editor b b b b b b b 

Additional modules 

8 temperature sensor inputs - MET148-2 module (2) v v v v 

1 low level analog output - MSA141 module v v v v v v v 

Logic inputs / outputs - MES114/MES114E/MES114F (10I/4O) module v v v v v v v 

Communication interface - ACE949-2 (2-wire RS 485), 

ACE959 (4-wire RS 485) or ACE937 (fiber optic) 

v v v v v v v 

b standard, v according to parameter setting an MES114/MES114E/MES114F or MET148-2 optional input/output modules 

(1) For shunt trip or undervoltage trip unit. 

(2) 2 modules possible. 

(3) Exclusive choice, phase-to-neutral voltage or phase-to-phase voltage for each of the 2 units. 

9

Metering 

Description 

Metering functions 

The values are displayed as primary values with the 

related units: A, V, Hz,°C,°F, W, … 

Current 

b RMS current for each of the 3 phases in the circuit, 

taking into account harmonics up to at least number 13 

b residual current. 

Average current and peak demand current 

b average current on each of the 3 phases 

b greatest average current on each of the 3 phases 

(peak demand current). 

The peak demand currents give the current consumed 

at the time of peak loads. 

The average current is calculated over a period that 

may be parameterized from 5 to 60 mn, and may be 

reset to zero. 

Voltage 

b phase-to-neutral voltages V1, V2, V3 

b phase-to-phase voltages U21, U32, U13 

b positive sequence voltage Vd 

b residual voltage V0 

b negative sequence voltage Vi. 

Frequency 

Power 

Active, reactive and apparent power, power factor 

(cos ϕ) 

Peak demand power 

Greatest value of active and reactive power absorbed, 

over the same period as peak demand currents, with 

the possibility of resetting to zero. 

Energy 

b 4 accumulated energy counters, calculated 

according to the currents and voltages measured: 

active and reactive energy, in each flow direction 

b 1 to 4 additional accumulated energy counters for the 

acquisition of active or reactive energy pulses delivered 

by external counters. 

Temperature 

Measurement of the temperature of each sensor. 

Network diagnosis 

assistance functions 

Tripping context 

Storage of the tripping currents and I0, ld, U21, U32, 

U13, V0, Vi, Vd, F, P and Q values at the time of the 

detection of the fault. The values for the last five trips 

are stored. 

Tripping current 

Storage of the 3 phase currents and earth current at the 

time the Sepam gave the last tripping order, so as to 

find out the fault current (fault analysis). 

The values are stored until the next trip. 

Negative sequence / unbalance 

Ratio of negative sequence phase current, 

characteristic of an unbalanced power supply of the 

equipment to be protected. 

Phase displacement 

b variance in phase ϕ1, ϕ2, ϕ3 between phase 

currents l1, l2, l3 and voltages V1, V2, V3 

b variance in phase ϕ0 between residual current and 

residual voltage. 

Disturbance recording 

Recording of sampled values of analog measurement signals and logic states. By 

parameter setting, it is possible to choose: 

b the events that will trigger a record 

b the recording period prior to the occurrence of the event 

b the number and duration of records (series 40 only). 

Characteristics Series 20 Series 40 

Number of records in 

COMTRADE format 

Total duration of a record 

2 Adjustable from 1 to 19 

86 periods (1.72 s at 50 Hz, 

1.43 s at 60 Hz) 

Number of points per period 12 12 

Duration of recording prior to 

occurrence of the event 

Recorded data 

Adjustable from 0 to 85 

periods 

Currents or voltages, 

logic inputs, pick up 

and logic output O1 

Adjustable from 1 s to 10 s 

The total of all the records plus 

one must not be more than 

20 s at 50 Hz and 16 s at 

60 Hz 

Adjustable from 0 to 99 

periods 

Currents and voltages, 

logic inputs, pick up, logic 

outputs (O1 to O4) 

Machine operation assistance functions 

Thermal capacity used 

Temperature build-up related to the load. 

It is displayed as a percentage of the rated thermal capacity. 

Remaining operating time before overload tripping 

Indicates the time remaining before tripping by the thermal overload protection 

function. 

Waiting time after overload tripping 

Indicates the time remaining before starting is allowed according to inhibition by the 

thermal protection function. 

Starting current and time / motor overload 

Measurement of the maximum current consumed by the motor during a starting 

sequence or an overload, as well as the duration. 

Start inhibit time delay / number of starts before inhibition 

Indicates the remaining number of starts allowed by the starts per hour protection 

function and, if the number is zero, the waiting time before starting is allowed. 

Running hours counter / operating time 

Cumulative time during which the protected equipment (motor or transformer) has 

been operating (I > 0.1 Ib). 

The cumulative value is displayed in hours (0 to 65535 h). 

Switchgear diagnosis functions 

These measurements are to be compared with the data supplied by the switchgear 

manufacturer. 

Cumulative breaking current 

The value displayed may be used to evaluate the state of the circuit breaker poles. 

Number of operations 

Running total of the number of opening operations performed by the device. 

Device operating time 

Operating time, charging time. 

These data may be used to evaluate the state of the pole operating mechanism. 

ANSI 60FL - CT/VT supervision 

This function is used to monitor the complete measurement chain: 

b CT and VT sensors 

b connection 

b Sepam analog inputs. 

Supervision is ensured by: 

b checking of the consistency of the currents and voltages measured 

b acquisition of phase or residual voltage transformer protection fuse melting 

contacts. 

In the event of current or voltage data loss, the assigned protection functions may be 

inhibited to avoid any nuisance tripping. 

10

Metering 

General settings and 

characteristics 

General settings Selection Series 20 range Series 40 range 

In rated phase current 

(sensor primary current) 

2 or 3 1 A / 5 A CTs 1 A to 6250 A 1 A to 6250 A 

3 LPCT sensors 25 A to 3150 A (1) 25 A to 3150 A (1) 

Ib base current 

0.4 to 1.3 In 0.4 to 1.3 In 

(corresponds to the rated power of the 

equipment) 

In0 residual current sum of the 3 phase currents see In rated phase current see In rated phase current 

CSH120 or CSH200 core bal. CT 2 A or 20 A rating 2 A, 5 A or 20 A rating 

1 A / 5 A CT + CSH30 interposing ring 1 A to 6250 A (In0 = In) 1 A to 6250 A (In0 = In) 

CT 

1 A / 5 A CT + CSH30 interposing ring 

CT - Sensitivity x10 

- 1 A to 6250 A (In0 = In/10) 

Unp primary rated phase-to-phase voltage 

(Vnp: primary rated phase-to-neutral 

voltage: Vnp = Unp/3) 

Uns secondary rated phase-to-phase 

voltage 

core balance CT + ACE990 

(the ratio of the core bal. CT 1/n should 

be such that 50 y n y 1500) 

according to current to be monitored 

and use of ACE990 

220 V to 250 kV 220 V to 250 kV 

according to current to be monitored 

and use of ACE990 

3 VTs: V1, V2, V3 100, 110, 115, 120, 200, 230 V 100, 110, 115, 120, 200, 230 V 

2 VTs: U21, U32 100, 110, 115, 120 V 100, 110, 115, 120 V 

1 VT: U21 100, 110, 115, 120 V 100, 110, 115, 120 V 

Pulse-type accumulated energy counter Increments active energy - 0.1 kW.h to 5 MW.h 

Increments reactive energy - 0.1 kvar.h to 5 Mvar.h 

Frequency 50 Hz or 60 Hz 50 Hz or 60 Hz 

(1) Table of In values in Amps: 25, 50, 100, 125, 133, 200, 250, 320, 400, 500, 630, 666, 1000, 1600, 2000, 3150. 

Functions Working ranges Accuracy series 20 (1) Accuracy series 40 (1) MSA141 (2) 

Metering 

Phase current 0.1 to 1.5 In (4) typically ± 1% typically ± 0.5% b 

Residual current 0.1 to 1.5 In0 typically ± 1% typically ± 1% b 

Average current and peak demand phase 0.1 to 1.5 In typically ± 1% typically ± 0.5% 

current 

Phase-to-phase voltage 0.05 to 1.2 Unp typically ± 1% typically ± 0.5% b 

Phase-to-neutral voltage 0.05 to 1.2 Vnp typically ± 1% typically ± 0.5% b 

Residual voltage 0.015 to 3 Vnp typically ± 1% typically ± 1% 

Positive sequence voltage 0.05 to 1.2 Vnp typically ± 5% typically ± 2% 

Negative sequence voltage 0.05 to 1.2 Vnp - typically ± 2% 

Frequency series 20 50 ± 5 Hz or 60 ± 5 Hz ± 0.05 Hz - b 

Frequency series 40 25 to 65 Hz - ± 0.02 Hz b 

Temperature -30°C to +200°C or -22°F to 392°F ± 1°C from +20 to +140°C ± 1°C from +20 to +140°C b 

Active power 0.015 Sn (3) at 999 MW - typically ± 1% b 

Reactive power 0.015 Sn (3) at 999 Mvar - typically ± 1% b 

Apparent power 0.015 Sn (3) at 999 MVA - typically ± 1% b 

Power factor -1 (CAP) to 1 (IND) - typically ± 1% 

Peak demand active power 0.015 Sn (3) at 999 MW - typically ± 1% 

Peak demand reactive power 0.015 Sn (3) at 999 Mvar - typically ± 1% 

Active energy 0 to 2.1.10 8 MW.h - ± 1%, ± 1 digit 

Reactive energy 0 to 2.1.10 8 Mvar.h - ± 1%, ± 1 digit 

Network diagnosis assistance 

Phase tripping current 0.1 to 40 In ± 5% ± 5% 

Earth fault tripping current 0.1 to 20 In0 ± 5% ± 5% 

Unbalance / neg. seq. current li 10% to 500% Ib ± 2% ± 2% 

Phase displacement ϕ0 0 to 359° - typically ± 2° 

Phase displacement ϕ1, ϕ2, ϕ3 0 to 359° - typically ± 2° 

Machine operation assistance 

Running hours counter / operating time 0 to 65535 hours ± 1% or ± 0.5 h ± 1% or ± 0.5 h 

Thermal capacity used 0 to 800% (100% for I phase = Ib) ± 1% ± 1% b 

Remaining operating time before overload 0 to 999 mn ± 1 mn ± 1 mn 

tripping 

Waiting time after overload tripping 0 to 999 mn ± 1 mn ± 1 mn 

Starting current 1.2 Ib à 24 In ± 5% ± 5% 

Starting time 0 to 300 s ± 300 ms ± 300 ms 

Start inhibit time delay 0 to 360 mn ± 1 mn ± 1 mn 

Number of starts before inhibition 0 to 60 1 1 

Cooling time constant 5 mn to 600 mn - ± 5% 

Switchgear diagnosis assistance 

Cumulative breaking current 0 to 65535 kA² ± 10% ± 10% 

Number of operations 0 to 65535 1 1 

Operating time 20 to 100 ms ± 1 ms ± 1 ms 

Charging time 1 to 20 s ± 0.5 s ± 0.5 s 

(1) In reference conditions (IEC 60255-6), typical for In or Unp. 

(2) Measurements available in analog format according to parameter setting of MSA141 module. 

(3) Sn: apparent power, = 3.Unp.In. 

(4) Measurement up to 0.02 In for information purpose. 

11

Protection 

Description 

Current protection functions 

ANSI 50/51 - Phase overcurrent 

Three-phase protection against overloads and phaseto-phase 

short-circuits. The protection function 

comprises four units: 

b definite time (DT) 

b IDMT (16 types of IDMT curves) 

b instantaneous or time-delayed. 

Each unit has a reset time setting that allows: 

b detection of restriking faults 

b coordination with electromechanical relays. 

ANSI 50V/51V - Voltage-restrained overcurrent 

Three-phase protection against overloads and phaseto-phase 

short-circuits, suited to generator protection, 

for which the tripping set point is adjusted according to 

the voltage. 

It may be set as follows: 







ANSI 50N/51N or 50G/51G - Earth fault or sensitive 

earth fault 

Protection against earth faults. 

Earth faults may be detected according to parameter 

setting based on: 

b the three phase currents (3I sum) 

b a specific CSH120 or CSH200 core balance CT 

according to the required diameter; this method gives 

greater sensitivity. The parameterizable choice of 

ratings provides a very wide range of settings. 

b a current transformer (1 A or 5 A), combined with a 

CSH30 interposing ring CT. 

The protection comprises four units: 







It also has harmonic 2 restraint to ensure stability 

during transformer energizing. 

ANSI 50 BF - Breaker failure 

Backup protection that delivers a tripping order to the 

upstream or adjacent breakers should the breaker that 

is being commanded fail to trip, detected by 

measurement of the through current after a tripping 

order. 

ANSI 46 - Negative sequence / unbalance 

Protection against phase unbalance. 

Sensitive protection to detect 2-phase faults at the end 

of long lines. 

Protection of equipment against temperature build-up 

cause by an unbalanced supply or the inversion or loss 

of a phase and against phase current unbalance. IDMT 

or definite time characteristics. 

Directional current protection functions 

ANSI 67 - Directional phase overcurrent 

This protection function is three-phase. It comprises a phase overcurrent function 

associated with direction detection. It picks up if the phase overcurrent function in the 

chosen direction (line or busbar) is activated for at least one of the three phases. It 

operates as definite time or IDMT. It is insensitive to the loss of measurement voltage 

at the time of the fault. 

ANSI 67N/67NC - Directional earth fault 

In order to adapt to all types of application and all system earthing arrangements 

(impedant, isolated or compensated neutral), the protection function operates 

according to a choice of 3 different types of characteristics: 

b type 1: the protection function uses the projection of the I0 vector 

b type 2: the protection function uses the I0 vector magnitude with half-plane tripping 

zone 

b type 3: the protection function uses the I0 vector magnitude with angular sector 

tripping zone 

The type 1 units allow the detection of restriking faults. 

The protection function comprises two units: 


b IDMT (16 types of IDMT curves) (type 2 only) 


The type 2 units have a reset time setting that allows: 



The type 3 units operate according to the Italian Enel DK5600 specification: 

b definite time curve (DT) 

b angular sector tripping zone defined by 2 adjustable angles. 

12

Protection 

Description 

Directional power protection 

functions 

ANSI 32P - Directional active overpower 

This protection function is activated if the power flowing 

in one direction or the other, according to the 

application (supplied or absorbed), is greater than the 

set point. 

ANSI 32Q/40 - Directional reactive overpower 

This protection function may be used to detect 

synchronous machine (generator or motor) field loss. 

The protection function is activated if the reactive 

power flowing in one direction or the other, according to 

the application (supplied or absorbed), is greater than 

the set point. 

Machine protection functions 

ANSI 49RMS - Thermal overload 

Protection of equipment against thermal damage caused by overloads. 

The protection may be inhibited by a logic input when required by process control 

conditions. 

The thermal capacity used is calculated according to a mathematical model which 

takes into account: 

b current RMS values 

b ambient temperature 

b negative sequence current, a cause of motor rotor temperature rise. 

The protection function comprises 2 groups of settings, each of which includes: 

b an adjustable alarm set point 

b an adjustable trip set point 

b the initial thermal capacity used setting, in order to accurately adapt the protection 

characteristics to fit the equipment’s thermal withstand curves supplied by the 

manufacturer. 

b the equipment’s heating and cooling time constants. 

Sepam series 40 has a function that automatically calculates the cooling time 

constant based on measurement of the equipment temperature by a sensor. 

Application for a transformer: 

switching of groups of settings by a logic input according to the transformer 

ventilation operating rate, natural or forced (ONAN or ONAF). 

Application for a motor: 

switching of groups of settings according to a current set point to take into account 

the thermal withstand of the motor with a blocked rotor. 

ANSI 37 - Phase undercurrent 

Protection of pumps against the consequences of loss of priming. 

The protection function detects time-delayed current drops that correspond to motor 

no-load operation, characteristic of the loss of pump priming. 

ANSI 48/51LR/14 - Locked rotor / excessive starting time 

Protection of motors that are liable to start with overloads or insufficient supply 

voltage and/or that drive loads that are liable to jam (e.g. crushers). 

The locked rotor function is an overcurrent protection function that is only confirmed 

after a time delay that corresponds to the normal starting time. 

Motor reacceleration and locked rotor detection (detection of zero speed) may be 

taken into account by logic inputs. 

ANSI 66 - Starts per hour 

Protection against overheating caused by too frequent starts. 

Checking of the number of: 

b starts per hour (or adjustable time period) 

b consecutive starts. 

The protection inhibits motor energizing for a preset time period once the permissible 

limits have been reached. 

Motor re-acceleration may be taken into account by a logic input. 

ANSI 26/63 - Thermostat, Buchholz, gas, pressure, temperature detection 

Protection of transformers against temperature rise and internal faults via logic inputs 

linked to devices integrated in the equipment. 

ANSI 38/49T - Temperature monitoring by RTD 

Protection function that detects abnormal overheating of the windings and/or 

bearings of motors equipped with RTDs. 

The protection includes 2 independent set points that are adjustable for each RTD. 

ANSI 27D - Positive sequence undervoltage 

Protection of motors against faulty operation due to insufficient or unbalanced supply 

voltage and detection of reverse rotation direction. 

In order for the protection to be used, voltage transformers must be connected to 

Sepam to measure U21 and U32. 

ANSI 27R - Remanent undervoltage 

Monitoring of the clearing of voltage sustained by rotating machines after circuit 

opening. The protection is used to prevent transient electrical and mechanical 

phenomena that are caused by fast re-energizing of motors. 

It monitors phase-to-phase voltage U21 or phase-to-neutral voltage V1. 

13

Protection 

Description 

Voltage protection functions 

ANSI 27 - Phase-to-phase undervoltage 

Protection used either for automated functions (transfer, load shedding) or to protect 

motors against undervoltage. The protection function monitors the drop in voltage in 

each of the phase-to-phase voltages measured. 

ANSI 27S - Phase-to-neutral undervoltage 

Protection used to detect phase-to-earth faults (isolated neutral systems). 

ANSI 59 - Phase-to-phase overvoltage 

Protection against abnormally high voltage or checking that there is sufficient voltage 

for a power supply transfer. It operates with phase-to-phase voltage (series 20 and 

series 40) or phase-to-neutral voltage (series 40 only). 

ANSI 59N - Neutral voltage displacement 

Detection of insulation faults in isolated neutral systems by the measurement of 

neutral voltage displacement. The protection function is generally associated with 

transformer incomer or busbar protection. 

The function includes 2 set points. 

ANSI 47 - Negative sequence voltage 

Protection against phase unbalance resulting from distant faults, a phase inversion 

or unbalanced power supply. 

Frequency protection functions 

ANSI 81H - Overfrequency 

Protection against abnormally high frequency. 

ANSI 81L - Underfrequency 

Detection of variances with respect to the rated frequency, in order to maintain a high 

quality power supply. The protection may be used for overall tripping or for load 

shedding. 

ANSI 81R - Rate of change of frequency (ROCOF) 

Protection used for fast disconnection of a source transmitting power into a power 

network when a fault occurs, or to monitor load shedding. 

Recloser 

ANSI 79 

Automation device used to reclose the circuit breaker after tripping triggered by a 

transient fault on a line (the funciton includes 1 to 4 parameterizable reclosing cycles 

and can be easily adapted for different operating modes). 

14

Protection 

Setting ranges 

Functions Settings Time delays 

ANSI 27 - Phase-to-phase undervoltage 

5 to 100% of Unp 0.05 s to 300 s 

ANSI 27D/47 - Positive sequence undervoltage 

15 to 60% of Unp 0.05 s to 300 s 

ANSI 27R - Remanent undervoltage 

5 to 100% of Unp 0.05 s to 300 s 

ANSI 27S - Phase-to-neutral undervoltage 

5 to 100% of Vnp 0.05 s to 300 s 

ANSI 32P - Directional active overpower 

1 to 120% of Sn (3) 0.1 s to 300 s 

ANSI 32Q/40 - Directional reactive overpower 

5 to 120% de Sn (3) 0.1 s to 300 s 

ANSI 37 - Phase undercurrent 

0.15 to 1 Ib 0.05 s to 300 s 

ANSI 38/49T - Temperature monitoring (RTDs) 

Alarm and trip set points 

0 to 180 °C (or 32 to 356 °F) 

ANSI 46 - Negative sequence / unbalance 

Definite time 0.1 to 5 Ib 0.1 s to 300 s 

IDMT 0.1 to 0.5 Ib (Schneider Electric) 0.1 to 1Ib (IEC, IEEE) 0.1 s to 1 s 

Tripping curve 

Schneider Electric 

IEC: SIT/A, LTI/B, VIT/B, EIT/C (2) 

IEEE: MI (D), VI (E), EI (F) (2) 

ANS 47 - Negative sequence overvoltage 

1 to 50% of Unp 0.05 s to 300 s 

ANSI 48/51LR/14 - Excessive starting time / locked rotor 

0.5 Ib to 5 Ib ST start time 0.5 s to 300 s 

LT and LTS time delays 

0.05 s to 300 s 

ANSI 49RMS - Thermal overload Rate 1 Rate 2 

Negative sequence factor 0 - 2.25 - 4.5 - 9 

Time constant Heating T1: 5 to 120 mn T1: 5 to 120 mn 

Cooling T2: 5 to 600 mn T2: 5 to 600 mn 

Alarm and trip set points 

50 to 300% of thermal capacity used 

Cold curve modification factor 0 to 100% 

Switching of thermal settings condition 

by logic input 

by Is setting adjustable from 0.25 to 8 Ib 

Maximum equipment temperature 60 to 200°C 

ANSI 50/51 - Phase overcurrent 

Tripping curve Tripping time delay Reset time 

Definite time 

DT 

SIT, LTI, VIT, EIT, UIT (1) 

DT 

RI 

DT 

IEC: SIT/A, LTI/B, VIT/B, EIT/C DT or IDMT 

IEEE: MI (D), VI (E), EI (F) 

DT or IDMT 

IAC: I, VI, EI 

DT or IDMT 

Is set point 0.1 to 24 In Definite time Inst.; 0.05 s to 300 s 

0.1 to 2.4 In IDMT 0.1 s to 12.5 s at 10 Is 

Reset time Definite time (DT; timer hold) Inst.; 0.05 s to 300 s 

IDMT (IDMT; reset time) 

0.5 s to 20 s 

Confirmation (2) 

None 

By negative sequence overvoltage 

By phase-to-phase undervoltage 

ANSI 50 BF - Breaker failure 

Presence of current 

0.2 to 2 In 

Operating time 

0.05 s to 300 s 

(1) Tripping as of 1.2 Is. 

(2) On series 40 only. 

(3) Sn = 3.In.Unp. 

15

Protection 



ANSI 50N/51N or 50G/51G - Earth fault 


Definite time 

DT 


DT 

RI 

DT 

IEC: SIT/A,LTI/B, VIT/B, EIT/C DT or IDMT 


DT or IDMT 


DT or IDMT 

Is0 set point 0.1 to 15 In0 Definite time Inst.; 0.05 s to 300 s 

0.1 to 1 In0 IDMT 0.1 s to 12.5 s at 10 Is0 




ANSI 50V/51V - Voltage-restrained phase overcurrent 


IDMT 

DT 

SIT, LTI, VIT, EIT, UIT 

DT 

RI 

DT 

IEC: SIT/A, LTI/B, VIT/B, EIT/C DT or IDMT 


DT or IDMT 


DT or IDMT 


0.1 to 2,4 In IDMT 0.1 s to 12.5 s at 10 Is 




ANSI 59 - Overvoltage phase-to-phase phase-to-neutral (2) 

50 to 150% of Unp 50 to 150% of Vnp 0.05 s to 300 s 

ANSI 59N - Neutral voltage displacement 

2 to 80% of Unp 0.05 s to 300 s 

ANSI 66 - Starts per hour 

Starts per period 1 to 60 Period 1 to 6 h 

Consecutive starts 1 to 60 Time between starts 0 to 90 mn 

ANSI 67 - Directional phase overcurrent 


Definite time 

DT 


DT 

RI 

DT 

CEI: SIT/A, LTI/B, VIT/B, EIT/C DT or IDMT 


DT or IDMT 


DT or IDMT 


0.1 to 2.4 In IDMT 0.1 s to 12.5 s at 10 Is 




Characteristic angle 30°, 45°, 60° 


(2) On series 40 only. 

16

Protection 



ANSI 67N/67NC type 1 - Directional earth fault, according to I0 projection 

Characteristic angle -45°, 0°, 15°, 30°, 45°, 60°, 90° 


Vs0 set point 

2 to 80% of Unp 

Memory time T0mem time 0; 0.05 s to 300 s 

V0mem validity set point 0; 2 to 80% of Unp 

ANSI 67N/67NC type 2 - Directional earth fault, according to I0 magnitude with half-plane tripping zone 

Characteristic angle -45°, 0°, 15°, 30°, 45°, 60°, 90° 


Definite time 

DT 

SIT, LTI, VIT, EIT, UIT (1) DT 

RI 

DT 

IEC, SIT/A,LTI/B, VIT/B, EIT/C DT or IDMT 

IEEE: MI (D), VI (E), EI (F) DT or IDMT 


DT or IDMT 


0.1 to 1 In0 IDMT 0.1 s to 12.5 s at 10 Is0 

Vs0 set point 

2 to 80% of Unp 




ANSI 67N/67NC type 3 - Directional earth fault, according to I0 magnitude with angular sector tripping zone 

Angle at start of tripping zone 0° to 359° 

Angle at end of tripping zone 0° to 359° 

Is0 set point CSH core balance CT (2 A rating) 0.2 A to 30 A Definite time Inst.; 0.05 to 300 s 

1 A CT + CSH30 

0.1 to 15 In0 (min. 0.1 A) 

(sensitive, In0 = 0.1 CT In) 

Core balance CT + ACE990 (range 1) 0.1 to In0 (min. 0.1 A) 

Vs0 set point Calculated V0 (sum of 3 2 to 80 % of Unp 

voltages) 

Measured V0 (external VT) 0.6 to 80 % of Unp 

ANSI 81H - Overfrequency 

series 20 50 to 53 Hz or 60 to 63 Hz 0.1 s to 300 s 


ANSI 81L - Underfrequency 


series 40 40 to 50 Hz or 50 to 60 Hz 0.1 s to 300 s 

ANSI 81R - Rate of change of frequency 

0.1 to 10 Hz/s Inst.; 0.15 s to 300 s 


17

Connection diagrams Sepam series 20 

S20 / T20 / M20 types 

B 

Ring lug 

4mm 

CCA630 1.5 to 6 mm 2 

(AWG 16 to AWG 10) 

C RJ45 CCA612 

D RJ45 CCA770: L = 0.6 m 

CCA772: L = 2 m 

CCA774: L = 4 m 

DE50592 

B21 / B22 types 

B 

Connection to 1 A / 5 A current sensors 

Connector Type Ref. Cable 

A 

Screwtype 

CCA620 1 wire 0.2 to 2.5 mm 2 

(u AWG 24-12) 

2 wires 0.2 to 1 mm 2 

(u AWG 24-16) 

Ring lug 

6.35 mm 

CCA622 


A 

Screwtype 


(u AWG 24-12) 


(u AWG 24-16) 

Ring lug 

6.35 mm 

CCA622 

Screwtype 

CCT640 1 wire 0.2 to 2.5 mm 2 

(u AWG 24-12) 


(u AWG 24-16) 

C RJ45 CCA612 

D RJ45 CCA770: L = 0.6 m 

CCA772: L = 2 m 

CCA774: L = 4 m 

DE50593 

(1) This type of connection allows the calculation of residual voltage. 

18

Connection diagrams Sepam series 40 

S40 / S41 / S42 types 

T40 / T42 / M41 / G40 types 

B 

Ring lug 

4mm 

CCA630 1.5 to 6 mm 2 

(AWG 16 to AWG 10) 

C RJ45 CCA612 

D RJ45 CCA770: L = 0.6 m 

CCA772: L= 2m 

CCA774: L=4m 

E 

Connection to 1 A / 5 A current sensors 


A 

Screwtype 


(u AWG 24-12) 


(u AWG 24-16) 

Ring lug 

6.35 mm 

CCA622 

Screwtype 

Ring lug 

6.35 mm 

CCA626 1 wire 0.2 to 2.5 mm 2 

(u AWG 24-12) 


(u AWG 24-16) 

CCA627 

DE50596 

(1) This type of connection allows the calculation of residual voltage. 

(2) Accessory for bridging terminals 3 and 5 supplied with CCA626 connector. 

19

Connection diagrams 

Phase current inputs 

Variant 1: phase current measurement by three 1 A or 5 A CTs (standard connection) 

Connection of three 1 A or 5 A CTs to the CCA630 connector. 

MT10990 

The measurement of the 3 phase currents allows the calculation of residual current. 

Variant 2: phase current measurement by two 1 A or 5 A CTs 

Connection of two 1 A or 5 A CTs to the CCA630 connector. 

MT10700 

The measurement of phase currents 1 and 3 is sufficient to ensure all the currentbased 

protection functions. 

This arrangement does not allow the calculation of residual current. 

MT10985 

Variant 3: phase current measurement by 3 LPCT type sensors 

Connection of 3 Low Power Current Transducer (LPCT) type sensors to the CCA670 

connector. The connection of just one or two sensors is not allowed and causes 

Sepam to switch to the fallback position. 

The measurement of the 3 phase currents allows the calculation of residual current. 

The In parameter, primary rated current measured by an LPCT, is to be chosen from 

the following values, in Amps: 25, 50, 100, 125, 133, 200, 250, 320, 400, 500, 630, 

666, 1000, 1600, 2000, 3150. 

Parameter to be set using the advanced UMI and the SFT2841 software tool, to be 

completed by hardware setting of the microswitches on the CCA670 connector. 

20


Residual current input 

MT10991 

Variant 1: residual current calculation by sum of 3 phase currents 

The residual current is obtained by taking the vector sum of the 3 phase currents I1, 

I2 and I3, measured by three 1 A or 5 A CTs or by three LPCT type sensors. 

See current input connection diagrams. 

Variant 2: residual current measurement by CSH120 or CSH200 core balance CT (standard connection) 

Arrangement recommended for the protection of isolated or compensated neutral 

systems in which very low fault currents need to be detected. 

Setting range from 0.1 In0 to 15 In0, with In0 = 2 A or 20 A (or 5 A for series 40) 

according to parameter setting. 

MT11045 

Variant 3: residual current measurement by 1 A or 5 A CT and CSH30 interposing ring CT 

The CSH30 interposing ring CT is used to connect Sepam to 1 A or 5 A CTs to 

measure the residual current. 

b connection of CSH30 interposing ring CT to 1 A CT: make 2 turns through the CSH 

primary winding 

b connection of CSH30 interposing ring CT to 5 A CT: make 4 turns through the CSH 

primary winding 

b with series 40, the sensitivity can be multiplied by 10 

by parameter setting of In0 = In/10. 

Setting range from 0.1 In to 15 In, or 0.01 In to 1.5 In (series 40) 

with In = CT primary current. 

DE50589 

MT11046 

Variant 4: residual current measurement by core balance CT with ratio 1/n (n between 50 and 1500) 

The ACE990 is used as an interface between a MV core balance CT with ratio 1/n 

(50 < n < 1500) and the Sepam residual current input. 

This arrangement makes it possible to keep the existing core balance CTs in the 

installation. 

Setting range from 0.1 In0 to 15 In0, with In0 = k.n, 

with n = number of turns through core balance CT 

and k = factor to be determined according to the wiring of the ACE990 and the 

parameter setting used by Sepam, among 20 discrete values from 0.00578 to 

0.26316. 

21


Sepam series 20 voltage inputs 

DE50686 

The phase and residual voltage transformer secondary circuits are connected to the 

CCT640 connector (item B ) on Sepam series 20, B type. The CCT640 connector 

contains 4 transformers which perform isolation and impedance matching of the VTs 

and Sepam input circuits. 

Variant 1: measurement of 3 phase-to-neutral voltages (standard connection) 

Phase voltage sensor parameter setting 

Residual voltage sensor parameter setting 

Voltages measured 

Values calculated 

3V 

3V sum 

V1, V2, V3 

U21, U32, U13, V0, Vd, f 

Measurements unavailable 

Protection functions unavailable 

(according to type of Sepam) 

None 

None 

DE50687 

Variant 2: measurement of 3 phase-to-neutral voltage and residual voltage 








3V 

External VT 

V1, V2, V3, V0 

U21, U32, U13, Vd, f 

None 

None 

DE50688 

Variant 3: measurement of 2 phase-to-phase voltages 








U21, U32 

None 

U21, U32 

U13, Vd, f 

V1, V2, V3, V0 

59N, 27S 

DE50689 

Variant 4: measurement of 1 phase-to-phase voltage and residual voltage 








U21 

External VT 

U21, V0 

f 

U32, U13, V1, V2, V3, Vd 

47, 27D, 27S 

DE50690 

Variant 5: measurement of 1 phase-to-phase voltage 








U21 

None 

U21 

f 

U32, U13, V1, V2, V3, V0, Vd 

47, 27D, 59N, 27S 

22


Sepam series 40 voltage inputs 

DE51050 

The phase and residual voltage transformer secondary circuits are connected 

directly to the connector marked E . 

The 3 impedance matching and isolation transformers are integrated in the 

Sepam series 40 base unit. 

Variant 1: measurement of 3 phase-to-neutral voltages (standard connection) 





3V 

3V sum 

V1, V2, V3 

U21, U32, U13, V0, Vd, Vi, f 




None 

None 

DE51006 

Variant 2: measurement of 2 phase-to-phase voltages and residual voltage 








U21, U32 

External VT 

U21, U32, V0 

U13, V1, V2, V3, Vd, Vi, f 

None 

None 

MT10994 

Variant 3: measurement of 2 phase-to-phase voltages 








U21, U32 

None 

U21, U32 

U13, Vd, Vi, f 

V1, V2, V3, V0 

67N/67NC, 59N 

MT11011 

Variant 4: measurement of 1 phase-to-phase voltage and residual voltage 








U21 

External VT 

U21, V0 

f 

U32, U13, V1, V2, V3, Vd, Vi 

67, 47, 27D, 32P, 32Q/40, 27S 

MT11016 

Variant 5: measurement of 1 phase-to-phase voltage 








U21 

None 

U21 

f 

U32, U13, V1, V2, V3, V0, Vd, Vi 

67, 47, 27D, 32P, 32Q/40, 

67N/67NC, 59N, 27S 

23


Description 

Sepam performs the basic control and monitoring functions necessary for the 

operation of the electrical network, thereby reducing the need for auxiliary relays. 

The control and monitoring functions may be parameterized using the SFT2841 

software tool, however each type of Sepam has parameter setting by default which 

allows easier commissioning in the most frequent applications. 

ANSI 94/69 - Circuit breaker/contactor control 

Sepam is used to control breaking devices equipped with different types of closing 

and tripping coils: 

b circuit breakers with shunt trip or undervoltage trip units 

b latching contactors with shunt trip units. 

The breaking device control function processes all the circuit breaker closing and 

tripping conditions based on: 

b breaking device status information 

b remote control orders 

b protection functions 

b program logic specific to each application (e.g. recloser). 

This function also inhibits breaking device closing according to the operating 

conditions. 

With Sepam series 20, it is necessary to use an MES114 module in order to have all 

the required logic inputs. 

Switching of groups of settings 

Used to switch from one group of phase overcurrent and earth fault protection 

settings to another group of settings. Switching may be performed by a logic input or 

via the communication link. 

Inhibition of thermal protection 

Thermal protection tripping may be inhibited via a logic input. 

Re-acceleration 

Allows a logic input to take into account the restarting of an unstopped motor. 

ANSI 68 - Logic discrimination (SSL) 

This function allows quick, selective tripping of the definite time or IDMT phase 

overcurrent and earth fault protection relays, without requiring the use of time 

intervals between upstream and downstream protection devices. The downstream 

relay transmits a blocking input signal if the protection device set points are 

exceeded. 

The upstream relay receives the blocking input signal on the logic input used for the 

inhibition function. A saving mechanism ensures the operation of the protection in the 

event of an inhibition link failure. 

ANSI 86 - Latching / acknowledgment 

Output relay latching may be parameterized. Latched tripping orders are stored and 

must be acknowledged in order for the device to be put back into service. The user 

acknowledges via the keypad or remotely via a logic input or the communication link. 

Latching is stored in the event of a power outage. 

Trip circuit supervision 

Detects trip circuit faults (shunt trip units). Detects open/closed position discrepancy 

faults (undervoltage trip units). 

Watchdog 

Indicates Sepam unavailability via output O4. 

Output relay test 

This function is used to activate each output relay. 

24


Logic inputs and outputs 

MT10680 

MT10681 

4 output relays on the base unit 

The 4 relay outputs O1, O2, O3 and O4 on the base unit are connected to 

connector A . 

Connector A of the base unit may be either of the following: 

b CCA620 screw-type connector 

b CCA622 ring lug connector. 

O1 and O2 are 2 control outputs used by the breaking device control function for: 

b O1: breaking device tripping 

b O2: inhibition of breaking device closing. 

O3 and O4 are indication outputs, only O4 can be activated by the watchdog function. 

CCA620 connector 

(screw-type terminal block for 

straight fittings). 

CCA622 connector 

(terminal block for ring lugs) 

MT10683 

MES114 module (10 inputs / 4 outputs). 

Optional input/output modules 

The 4 outputs on the base unit may be completed by adding an MES114 10 input/ 

4 output module on the back of the base unit. 

3 modules are offered, MES114, MES114E or MES114F, to suit the different input 

voltage supply ranges. 

The modules offer different switching thresholds as well. 

The MES114 module is fully compatible with the MES108 (4 input/4 output) module 

which is no longer commercialized. 

Input characteristics 

b 10 potential-free inputs 

b external power source. 

Logic inputs MES114 MES114E MES114F 

Voltage 24 

to 250 V DC 

Range 19.2 

to 275 V DC 

110 

to 125 V DC 

88 

to 150 V DC 

110 V AC 220 

to 250 V DC 

88 

to 132 V AC 

176 

to 275 V DC 

220 

to 240 V AC 

176 

to 264 V AC 

Frequency - - 47 to 63 Hz - 47 to 63 Hz 

Typical consumption 3 mA 3 mA 3 mA 3 mA 3 mA 

Typical switching 

threshold 

14 V DC 82 V DC 58 V AC 154 V DC 120 V AC 

Input limit At state 1 u 19 V DC u 88 V DC u 88 V AC u 176 V DC u 176 V AC 

voltage 

At state 0 y 6 V DC y 75 V DC y 22 V AC y 137 V DC y 48 V AC 

Output characteristics 

b 4 relay outputs O11, O12, O13, O14 

v O11: control output, used for breaking device closing 

v O12, O13, O14: indication outputs. 

Connection to screw-type connectors 

b 1 wire with cross-section 0.2 to 2.5 mm² (u AWG 24-12) 

b or 2 wires with cross-section 0.2 to 1 mm² (u AWG 24-16). 

MT10684 

O1 

A 

5 

4 

D 

+ 

MT10685 

O1 

A 

5 

4 

D 

+ 

Wiring of the breaking device trip circuit 

Wiring to be used when the "CB control" function is activated. 

I11 

I12 

M 

1 

2 

4 

5 

I11 

I12 

M 

1 

2 

4 

5 

Wiring for shunt trip coil. 

With monitoring of trip circuit 

and open/closed matching. 

Wiring for undervoltage trip 

unit. 

With monitoring of open / 

closed matching. 

25


Logic input / output assignment 

for Sepam series 20 

Chart of logic input and output assignments 

for Sepam series 20 applications 

The use of the preset control and monitoring functions requires exclusive parameter 

setting and particular wiring of the inputs according to the application and type of 

Sepam. Input assignment and parameter setting of the control and monitoring 

functions may be done on the advanced UMI or using the SFT2841 software tool. 

Since a current input may only be assigned to a single function, not all the functions 

are available at the same time. 

Example: when the logic discimination function is used, the switching of groups of 

settings function may not be used. 

Functions S20 T20 M20 B21, B22 Assignment 

Logic inputs 

Open position b b b b I11 

Closed position b b b b I12 

Logic discrimination, receive blocking input 

b b I13 

Switching of groups of settings A/B 

b b b 

External reset 

b 

b 

b 

b 

I14 

External tripping 4 (1) 

b 

b 

b 

b 


b 

b (2) 

b 

b 

I21 

External network synchronization 

b 

b 

b 

b 


Motor re-acceleration 

b b (3) b 

b 

b 

I22 


Thermistor tripping (1) 

Buchholz alarm (1) 

Rotor direction detection 

b b (4) 

b 

b 

End of charging position 

Thermostat alarm (1) 

Thermistor alarm (1) b b 

b 

b 

Inhibit remote control (1) 

b 

b 

SF6-1 

b 

b 

SF6-2 

Switching of thermal settings 

Inhibit thermal overload 

Inhibit recloser 

b 

b 

Logic outputs 

Tripping b b b b O1 

Inhibit closing b b b b O2 

Watchdog b b b b O4 

Close order b b b b O11 

NB: all of the logic inputs are available via the communication link and are accessible in the SFT2841 matrix for other non predefined applications. 

(1) These inputs have parameter setting with the prefix "NEG" for undervoltage type operation. 

(2) Buchholz/Gaz trip message. 

(3) Thermostat trip message. 

(4) Pressure trip message. 

b 

b 

b 

b 

b 

b 

b 

b 

b 

b 

b 

b 

b 

b 

b 

b 

b 

I23 

I24 

I25 

I26 

26


Logic input / output assignment 

for Sepam series 40 

Chart of logic input and output assignments 

for Sepam series 40 applications 

The functions defined in the chart below are associated with a logic input by 

configuration. This means that the functions used may be adapted to suit needs 

within the limits of the logic inputs available. They may be reversed for undervoltage 

type operation. 

Functions S40, S41 S42 T40, T42 M41 G40 Assignment 

Logic inputs 

Open position b b b b b I11 

Closed position b b b b b I12 

Logic discrimination, receive blocking input 1 b b b b Free 

Logic discrimination, receive blocking input 2 b Free 

Switching of groups of settings A/B b b b b b I13 

External reset b b b b b Free 

External tripping 1 b b b b b Free 



Buchholz/gas tripping b Free 

Thermostat tripping b Free 

Pressure tripping b Free 

Thermistor tripping b b b Free 

Buchholz/gas alarm b Free 

Thermostat alarm b Free 

Pressure alarm b Free 

Thermistor alarm b b b Free 

End of charging position b b b b b Free 

Inhibit remote control b b b b b Free 

SF6 b b b b b Free 

Inhibit recloser b b Free 

External synchronization b b b b b I21 

Inhibit thermal overload b b b Free 

Switching of thermal settings b b b Free 

Motor re-acceleration b Free 

Rotor rotation detection b Free 

Inhibit undercurrent b Free 

Inhibit closing b b b b b Free 

Open order b b b b b Free 

Close order b b b b b Free 

Phase voltage transformer fuse melting b b b b b Free 

Residual voltage transformer fuse melting b b b b b Free 

External positive active energy counter b b b b b Free 

External negative active energy counter b b b b b Free 

External positive reactive energy counter b b b b b Free 

External negative reactive energy counter b b b b b Free 

Logic outputs 

Tripping b b b b b O1 

Inhibit closing b b b b b O2 

Watchdog b b b b b O4 

Close order b b b b b O11 

NB: all of the logic inputs are available via the communication link and are accessible in the SFT2841 matrix for other non predefined applications. 

27


Annunciation 

ANSI 30 - Front panel indications 

The appearance of alarms is indicated locally by: 

b messages on the advanced UMI display, available in 2 language versions: 

v in English, factory-set messages, non-modifiable 

v in the local language, according to the version delivered. 

The language version is chosen at the time of parameter setting. 

b signal lamps on the front panel. 

Signal lamp addressing may be parameterized via the SFT2841 software tool. 

Remote annunciation 

Used to transfer data to the control room via the communication link. 

Information such as circuit breaker position, SF6 fault alarm, etc. 

Alarm processing on advanced UMI 

b when an event appears, the signal lamp goes on and the related message is 

displayed 

b to clear the message from the display, the user presses the "clear" key 

b after the fault disappears and the user presses the "reset" key, the signal lamp 

goes off and the protection unit is reset 

b the list of alarm messages remains accessible ( ! key) and may be cleared by 

pressing the "clear" key. 

List of main messages (1) 

Functions English (factory-set) Local language (e.g. French) 

Phase overcurrent PHASE FAULT DEFAUT PHASE 

Earth fault EARTH FAULT DEFAUT TERRE 

Breaker failure BREAKER FAILURE DEF. DISJONCTEUR 

Negative sequence / unbalance UNBALANCE I DESEQUIFREE I 

Directional phase overcurrent DIR. PHASE FAULT DEFAUT PHASE DIR. 

Directional earth fault DIR. EARTH FAULT DEFAUT TERRE DIR. 

Active overpower REVERSE P RETOUR P 

Thermal overload THERMAL ALARM ECHAUF T . ALARME 

THERMAL TRIP ECHAUF T . DECL T . 

Locked rotor / ROTOR BLOCKING BLOCAGE ROTOR 

Rotor locked at starting ST RT LOCKED ROT R . BLOC ROTOR DEM. 

Excessive starting time LONG START DEMARRAGE LONG 

Starts per hour START INHIBIT DEMARRAGE INHIBE 

Phase undercurrent UNDER CURRENT CURRENT > 

Undervoltage UNDERVOLTAGE VOLTAGE


Customization 

Each Sepam has a logic scheme by default according to the type chosen (S20, 

T20,...). 

The default program logic links the data derived from the protection functions to the 

signal lamps and output relays to fit the unit’s most frequently used application. 

It may be adapted for specific operations using the SFT2841 software tool, which 

offers the following customization functions: 

b customization of the control matrix 

b logical equation editor (for Sepam series 40 only) 

b modification of message wording (for Sepam series 40 only). 

MT11104 

Control matrix 

The control matrix as a simple way to assign the input data derived from: 


b control and monitoring functions 

b logic inputs 

to the following output data: 

b 9 signal lamps on the front panel of Sepam 

b output relays 

b triggering of disturbance recording. 

SFT2841: control matrix. 

MT11105 

SFT2841: logical equation editor (series 40). 

Logical equation editor 

(Sepam series 40) 

Sepam series 40 includes a logical equation editor which may be used to adapt the 

standard control functions to suit various specific cases by programming the 

additional functions required. 

A logical equation editor groups logic input data derived from: 


b logic inputs 

using the Boolean operators AND, OR, XOR, NOT, and automation functions such 

as time delays, bistables and time programming. 

The result of an equation may then be: 

b assigned to a logic output, a signal lamp, a message via the control matrix 

b transmitted by the communication link, as a new remote indication 

b utilized by the circuit breaker/contactor control function to trip, close or inhibit 

closing of the breaking device 

b used to inhibit or reset a protection function. 

The entry of equations is assisted, and a syntax check is carried out systematically. 

Alarm and operating messages 

(Sepam series 40) 

The wording of Sepam alarm and operating messages may be customized using the 

SFT2841 software tool. 

The new messages are added to the list of existing messages and may be assiged 

via the control matrix. 

29

Communication 

Description and characteristics 

PE50029 

PE50024 

With Modbus communication, 

Sepam units may be connected to a remote 

monitoring and control system equipped 

with a master Modbus communication 

channel. 

To connect Sepam to a communication 

network, an interface module is required: 

b ACE949-2, interface for connection to a 

2-wire RS 485 network 

b ACE959, interface for connection to a 

4-wire RS 485 network 

b ACE937, interface for connection to a 

fiber optic communication star system. 

ACE949-2 2-wire RS 485 network connection interface. 

30 

Data available 

The data available depend on the type of Sepam. All of the data used by the remote 

monitoring and control system are grouped together so as to be available in a single 

readout. 

Readout of measurements and diagnosis information 

All of the values measured by Sepam are available in the control room: 

b phase and earth fault currents, peak demand currents 

b phase-to-phase, phase-to-neutral and residual voltages, frequency 

b active and reactive power, peak demand power, accumulated energy 

b temperatures 

b switchgear diagnosis data: cumulative breaking current, operating time and 

number of operations, circuit breaker charging time, etc. 

b machine operating assistance data: motor starting time, remaining operating time 

before overload tripping, waiting time after tripping, etc. 

Remote indications 

b reading of digital remote indication data. 

Remote indications are preassigned to the protection or control functions and 

depend on the type of Sepam. 

b reading of the status of 10 logic inputs. 

Remote control orders 

Writing of 16 pulse-type remote control orders (TC): 

b in direct mode 

b or in SBO (Select Before Operate) mode. 

The remote control orders are preassigned to the metering, protection or control 

functions and depend on the type of Sepam. 

Time-tagging of events 

b time-tagged data: logic inputs, remote indications. 

b time-tagging of event within a ms 

b synchronization by Modbus network or by external signal received by logic input I21. 

Remote setting 

b reading of Sepam configuration identification 

b reading of protection function settings (remote reading) 

b writing of protection function settings (remote setting). 

Protection setting writing may be inhibited by parameter setting. 

Other functions available via the communication link 

b remote control of the MSA141 optional analog output 

b transfer of disturbance recording data. 

Characteristics 

Sepam Modbus communication port 

Type of transmission 

Asynchronous serial 

Protocol 

Modbus 

Response time 

< 15 ms 

Maximum number of slaves 25 

ACE937 fiber optic connection interface. Data format 10 bits: 1 start, 8 data, 1 stop 

or 11 bits: 1 start, 8 data, 1 parity, 1 stop 

Parameters 

Slave address 1 to 255 

Transmission rate 

4800, 9600, 19200, 38400 bauds 

Parity check 

None, even, odd 

RS 485 electrical interface 

Standard 

EIA 2-wire RS 485 differential (ACE949-2) 

EIA 4-wire RS 485 differential (ACE959) 

Distributed power supply External, 12 V DC or 24 V DC ±10 % 

Consumption 

16 mA in receiving mode / 40 mA max. in sending mode 

Number 

of Sepam units 

Max. length of RS 485 network 

with 12 V DC power supply 

Max. length of RS 485 network 

with 24 V DC power supply 

5 320 m 1000 m 

10 180 m 750 m 

20 160 m 450 m 

25 125 m 375 m 

Fiber optic interface 

Wavelength 

820 Nm (infra-red) 

Type of connector 

ST 

Fiber type 

Multimode glass 

Fiber optic 

diameter (µm) 

Numerical 

aperture (NA) 

Max. attenuation 

(dBm/km) 

Min. optical power 

available (dBm) 

Max. length 

of fiber (m) 

50 / 125 0.2 2.7 5.6 700 

62.5 / 125 0.275 3.2 9.4 1800 

100 / 140 0.3 4 14.9 2800 

200 (HCS) 0.37 6 19.2 2600

Communication 

Description and characteristics 

DE51055 

Connection of the ACE949-2 

interface for 2-wire RS 485 networks 

Implementation of the Modbus network 

RS 485 network 

A set of adapted accessories is used for fast, dependable implementation of the 

communication network from both the electrical and environmental (electromagnetic 

compatibility) viewpoints. 

MT10712 

DE51056 

Connection of the ACE959 

interface for 4-wire RS 485 networks 

1 Network connection interface, to be supplied by 12 V DC or 24 V DC distributed 

power supply 

b ACE949-2 for 2-wire RS 485 networks 

b or ACE959 for 4-wire RS 485 networks. 

2 CCA612 cord for connection of the interface to the C port of the Sepam base 

unit. 

3 Interface for connection of the RS 485 network to the Modbus master, with 

distributed power supply to the ACE949-2 interfaces and polarization/termination of 

the communication link 

b ACE909-2, RS 232/2-wire RS 485 converter 

b or ACE919CA (110 V AC or 220 V AC) 2-wire RS 485/2-wire RS 485 interface 

b or ACE919CC (24 V DC or 48 V DC) 2-wire RS 485/2-wire RS 485 interface. 

4 Modbus network cable 

b for 2-wire RS 485 network: two shielded twisted pairs 

(1 RS 485 pair, 1 pair for power suuply) 

b for 4-wire RS 485 ntework: three shielded twisted pairs 

(2 RS 485 pairs, 1 pair for power supply) 

b with tinned copper braiding shielding, coverage: > 65% 

b characteristic impedance: 120 Ω 

b gauge: AWG 24 

b resistance per unit length: < 100 Ω/km 

b capacitance between conductors: < 60 pF/m 

b capacitance between conductor and shielding: < 100 pF/m 

b maximum length: 1300 m. 

Example of standard cable (for 2-wire RS 485 network): 

b supplier: BELDEN reference: 9842 

b supplier: FILOTEX reference: FMA-2PS. 

High-performance cable (for 2-wire RS 485 network): 

b supplier: FILECA reference: F2644-1 (cable distributed by Schneider Electric in 

60 m strands, reference CCR301). 

Fiber optic network 

Rx+, Rx-: Sepam receiving (eq IN+, IN-) 

Tx+, Tx-: Sepam transmitting (eq OUT+, OUT-) 

(1) Distributed power supply with separate wiring or included in 

the shielded cable (3 pairs). 

(2) Terminal block for connection of the distributed power 

supply module. 

DE50590 

Connection of the ACE937 fiber optic interface 

DE50274 

1 ACE937 fiber optic connection interface. 

2 CCA612 cord for connection of the interface to the C port of the Sepam base 

unit. 

3 

4 

Optical star. 

Fiber optic. 

31

Optional remote modules 

Description 

PE50243 

DSM303 remote advanced UMI module 

The DSM303 module provides the same functional features as the fixed advanced 

UMI. 

Associated with a Sepam with a basic UMI, it may be installed on the front panel of 

the cubicle in the most suitable operating location. 

b reduced depth of 30 mm 

b a single module for each Sepam with a basic UMI, to be connected by one of the 

CCA772 or CCA774 prefabricated cords (2 or 4 meters). This module may not be 

connected to Sepam units with integrated advanced UMIs. 

DSM303 remote advanced UMI module. 

MT11009 

MSA141 analog output module 

The MSA141 module converts Sepam measurements into analog signals. 

b selection of the measurement to be converted by parameter setting 

b 0-10 mA, 4-20 mA or 0-20 mA analog signal according to parameter setting 

b connection of the analog output to a screw-type connector: 

v 1 wire with cross-section 0.2 to 2.5 mm² (u AWG 24-12) 

v or 2 wires with cross-section 0.2 to 1 mm² (u AWG 24-16) 

b a single module for each Sepam base unit, to be connected to one of the CCA770, 

CCA772 or CCA774 prefabricated cords (0.6, 2 or 4 meters). 

MSA141 analog output module. 

MT11010 

MET148-2 temperature sensor module. 

MET148-2 temperature sensor module 

Temperature measurement (e.g. in transformer or motor windings) is utilized by the 

following protection functions: 

b thermal overload (to take into account the ambient temperature) 

b temperature monitoring. 

With the MET148-2 module, 8 temperature sensors may be connected. 

b type of temperature sensor Pt100, Ni100 or Ni120 according to parameter setting 

b 3-wire temperature sensors 

b connection of temperature sensors to screw-type connectors: 

v 1 wire with cross-section 0.2 to 2.5 mm² (u AWG 24-12) 

v or 2 wires with cross-section 0.2 to 1 mm² (u AWG 24-16) 

b a single module for each Sepam series 20 base unit, to be connected to one of the 

CCA770, CCA772 or CCA774 prefabricated cords (0.6, 2 or 4 meters) 

b 2 modules for each Sepam series 40 base unit, to be connected to one of the 

CCA770, CCA772 or CCA774 prefabricated cords (0.6, 2 or 4 meters). 

32

Optional remote modules 

Connections 

MT10713 

Connection of DSM303 

remote advanced UMI 

Connection of MSA141 

remote analog output 

DE50610 

Wiring of inter-module links 

Different module connection combinations are possible and the modules are 

connected by prefabricated cords which come in 3 different lengths: 

b CCA770 (L = 0.6 m) 

b CCA772 (L = 2 m) 

b CCA774 (L = 4 m). 

The modules are linked by cords which provide the power supply and act as 

functional links with the Sepam unit (D connector to Da connector Da, Dd to Da, ...). 

The DSM303 module may only be connected at the end of the link. 

DE51048 

Connection of the MET148-2 

8 temperature sensor inputs 

DE51049 

Maximum configuration 

Three modules at the most may be connected to the base unit in accordance with the 

order and maximum lengths of connections specified in the chart below: 

Base Cord Module 1 Cord Module 2 Cord Module 3 

series 20 CCA772 MSA141 CCA770 MET148-2 CCA774 DSM303 

series 40 CCA772 MSA141 CCA770 MET148-2 CCA774 DSM303 

series 40 CCA772 MSA141 CCA770 MET148-2 CCA772 MET148-2 

series 40 CCA772 MET148-2 CCA770 MET148-2 CCA774 DSM303 

33

Sensors 

LPCT type current sensors 

MT11003 

CLP1 LPCT sensors 

Low Power Current Transducers (LPCT) are voltage-output current sensors, 

compliant with the IEC 60044-8 standard. 

Merlin Gerin's range of LPCT sensors include the following models: CLP1, CLP2, 

CLP3, TLP160 and TLP190. The secondary winding of the sensors is pre-equipped 

with a shielded cable fitted with an RJ45 connector. 

LPCT sensors are connected to Sepam via a CCA670 interface connector, mounted 

on the rear panel of the Sepam base unit. The rated secondary voltage of the sensor 

is 22.5 mV. The rated primary current is selected from the following values: 25, 50, 

100, 125, 133, 200, 250, 320, 400, 500, 630, 666, 1000, 1600, 2000 and 3150 A. 

LPCT CLP1 sensor. 

DE50693 

ACE917 injection adapter 

The ACE917 adapter is used to test the protection chain with a standard injection 

box, when Sepam is connected to LPCT sensors. 

The ACE917 adapter is inserted between: 

b the standard injection box 

b the LPCT test plug: 

v integrated in the Sepam CCA670 connector 

v or transferred by means of the CCA613 accessory. 

The following are supplied with the ACE917 injection adapter: 

b 220 V AC power supply cord 

b 3-meter ACE917 / LPCT test plug on CCA670 or CCA613 connection cord. 

Accessory connection principle. 

CCA613 remote test plug 

The CCA613 test plug, panel-mounted on the front of the cubicle and fitted with a 3- 

meter cord, is used to transfer data from the integrated test plug to the CCA670 

interface connector on the rear panel of Sepam. 

MT11022 

MT11056 

MT11028 

67,5 

69 

44 

46 

Front view with cover lifted. Right side view. Cutout. 

34

Sensors 

Core balance CTs 

MT10315 

CSH120, CSH200 core balance CTs 

The specifically designed CSH120 and CSH200 core balance CTs are used for direct 

residual current measurement. The only difference between them is the diameter. 

Characteristics: 

b accurancy: ± 5% at 20°C 

b transformation ratio: 1/470 

b maximum permissible current: 20 kA - 1 s 

b operating temperature: - 25°C to +70°C 

b storage temperature: - 40°C to +85°C 

b drift in accuracy related to temperature: ± 1% 

b the wiring resistance should be < 4 Ω. 

CSH120 and CSH200 core balance CTs. 

MT11057 

Dimensions (mm) 

Weight 

(kg) 

A B D E F H J K L 

CSH120 120 164 44 190 76 40 166 62 35 0.6 

CSH200 200 256 46 274 120 60 257 104 37 1.4 

MT11058 

CSH30 interposing ring CT 

The CSH30 interposing ring CT is used as an interface when the residual current is 

measured using 1 A or 5 A current transformers. 

It should be installed near the Sepam input (L < 2 m). 

b weight: 0.12 kg 

b mounted on symmetrical DIN rail. 

MT10720 

ACE990 core balance CT interface 

The ACE990 interface is used to adapt measurements between a MV core balance 

CT with a ratio of 1/n (50 y n y 1500), and the Sepam residual current input. 



b mounted on symmetrical DIN rail 

b accuracy: 

v amplitude: ± 1% 

v phase: < 2° 

b maximum permissible current: 20 kA 1 s (on the primary winding of a 

MV core balance CT with a ratio of 1/50 that does not saturate) 

b operating temperature: -5°C to +55 °C. 

b storage temperature: -25 °C to +70 °C. 

35


Size and weight 

Base units 

DE50928 

DE50964 

b Weight of Sepam series 20: 

v 1.2 kg without options 

v 1.7 kg with options 

b Weight of Sepam series 40: 

v 1.4 kg without options 

v 1.9 kg with options 

Front view of Sepam. 

Side view of Sepam with advanced UMI and 

MES114, flush-mounted in front panel. 

Support frame: 1.5 mm to 3 mm thick. 

Clearance for Sepam assembly 

and wiring. 

(1) With basic UMI: 23 mm. 

DE50924 

DE50925 

Top view of Sepam with advanced UMI and 

MES114, flush-mounted in front panel. 

Support frame: 1.5 mm to 3 mm thick. 

Cut-out. 

Cutout accuracy must be complied with to ensure good 

Sepam mechanical withstand. 

AMT840 mounting plate 

DE50926 

"Terminal block" mounting with AMT840 plate 

Used to mount Sepam at the back of the compartment with access to the connectors 

on the rear panel. 

Mounting associated with the use of the remote advanced UMI (DSM303). 

DE51054 

AMT840 mounting plate. 

Top view of Sepam with MES114, flush-mounted in front panel. 

Mounting plate: 3 mm thick. 

36


Size and weight 

Accessories 

DSM303 module 

b Weight: 0.3 kg 

Cutout for panel-mounting (mounting plate thickness < 3 mm) 

Side view 

Cutout 

DE50692 

MT11063 

MT11064 

ACE949-2 module 



ACE959 module 



ACE937 module 



MT10725 

MT10726 

DE50685 

MET148-2 module 



MSA141 module 



MT10727 

MT10728 

(1) Depth with CCA77x connection cord: 70 mm. 

37


Electrical characteristics 

Analog inputs 

Current transformer input impedance < 0.001 Ω 

1 A or 5 A CT (with CCA630) consumption < 0.001 VA at 1 A 

1 A to 6250 A ratings < 0.025 VA at 5 A 

rated thermal withstand 

3 In 

1-second overload 

100 In 

Voltage transformer input impedance > 100 kΩ 

220 V to 250 kV ratings input voltage 100 to 230/√3 V 

rated thermal withstand 

230 V (1.7 Unp) 

1-second overload 

480 V (3.6 Unp) 

Temperature sensor input (MET148-2 module) 

Type of sensor Pt 100 Ni 100 / 120 

Isolation from earth none none 

Current injected in sensor 4 mA 4 mA 

Maximum distance between sensor and module 

1 km 

Logic inputs MES114 MES114E MES114F 

Voltage 24 to 250 V DC 110 to 125 V DC 110 V AC 220 to 250 V DC 220 to 240 V AC 

Range 19.2 to 275 V DC 88 to 150 V DC 88 to 132 V AC 176 to 275 V DC 176 to 264 V AC 

Frequency - - 47 to 63 Hz - 47 to 63 Hz 

Typical consumption 3 mA 3 mA 3 mA 3 mA 3 mA 

Typical switching threshold 14 V DC 82 V DC 58 V AC 154 V DC 120 V AC 

Input limit voltage At state 1 u 19 V DC u 88 V DC u 88 V AC u 176 V DC u 176 V AC 

At state 0 y 6 V DC y 75 V DC y 22 V AC y 137 V DC y 48 V AC 

Control output relays (O1, O2, O11 contacts) 

Voltage DC 24 / 48 V DC 127 V DC 220 V DC 

AC (47.5 to 63 Hz) - - - 100 to 240 V AC 

Rated current 8 A 8 A 8 A 8 A 

Breaking capacity resistive load 8 / 4 A 0.7 A 0.3 A 

L/R load < 20 ms 6 / 2 A 0.5 A 0.2 A 

L/R load < 40 ms 4 / 1 A 0.2 A 0.1 A 

resistive load - - - 8 A 

p.f. load > 0.3 - - - 5 A 

Making capacity 

< 15 A for 200 ms 

Indication output relays (O3, O4, O12, O13, O14 contacts) 

Voltage DC 24 / 48 V DC 127 V DC 220 V DC 

AC (47.5 to 63 Hz) - - - 100 to 240 V AC 

Rated current 2 A 2 A 2 A 2 A 

Breaking capacity L/R load < 20ms 2 / 1 A 0.5 A 0.15 A 

p.f. load > 0.3 - - - 1 A 

Power supply Sepam series 20 

range deactivated consumption (1) max. consumption (1) inrush current 

24 / 250 V DC -20% +10% 2 to 4.5 W 6 to 8 W < 10 A for 10 ms 

110 / 240 V AC -20% +10% 3 to 9 VA 9 to 15 VA < 15 A for 1 st half-period 

47.5 to 63 Hz 

brownout withstand 

10 ms 

Power supply Sepam series 40 

range deactivated consumption (1) max. consumption (1) inrush current 

24 / 250 V DC -20% +10% 3 to 6 W 7 to 11 W < 28 A 100 µs 

110 / 240 V AC -20% +10% 3 to 6 VA 9 to 25 VA < 28 A 100 µs 

47.5 to 63 Hz 

brownout withstand 

20 ms 

Analog output (MSA141 module) 

Current 

4 - 20 mA, 0 - 20 mA, 0 - 10 mA 

Load impedance 

< 600 Ω (wiring included) 

Accuracy 0.50% 

(1) According to configuration. 

38


Environmental characteristics 

Electromagnetic comptability IEC / EN standard Level / Class Value 

Emission tests 

Disturbing field emission EN 55022 / CISPR22 A 

Conducted disturbance emission EN 55022 / CISPR22 B 

Immunity tests – Radiated disturbances 

Immunity to radiated fields IEC 60255-22-3 / 61000-4-3 III 10 V/m 

Electrostatic discharge IEC 60255-22-2 / 61000-4-2 III 8 kV air 

6 kV contact 

Immunity tests – Conducted disturbances 

Immunity to conducted RF disturbances IEC 61000-4-6 III 10 V 

Fast transient bursts IEC 60255-22-4 / 61000-4-4 IV 

1 MHz damped oscillating wave IEC 60255-22-1 III 2.5 kV MC 

1 kV MD 

Impulse waves IEC 61000-4-5 III 

Voltage interruptions IEC 60255-11 series 20: 100 % 10 ms 

series 40: 100 % 20 ms 

Mechanical robustness IEC / EN standard Level / Class Value 

In operation 

Vibrations IEC 60255-21-1 2 1 Gn 

Shocks IEC 60255-21-2 2 10 Gn / 11 ms 

Earthquakes IEC 60255-21-3 2 

De-energised 

Vibrations IEC 60255-21-1 2 (1) 2 Gn 

Shocks IEC 60255-21-2 2 (1) 30 Gn / 11 ms 

Jolts IEC 60255-21-2 2 (1) 20 Gn / 16 ms 

Climatic withstand IEC / EN standard Level / Class Value 

In operation 

Exposure to cold IEC 60068-2-1 series 20: Ab 

series 40: Ad 

Exposure to dry heat IEC 60068-2-2 series 20: Bb 

series 40: Bd 

Continuous exposure to damp heat IEC 60068-2-3 Ca 10 days; 93 % RH; 40 °C 

Temperature variation with specified variation rate IEC 60068-2-14 Nb –25 °C à +70 °C 

5 °C/min 

Salt mist IEC 60068-2-52 Kb / 2 

Influence of corrosion IEC 60068-2-60 C 21 days; 75 % HR; 25 °C; 

0,5 ppm H 2 S; 1 ppm SO 2 

In storage (4) 

Exposure to cold IEC 60068-2-1 Ab -25 °C 

Exposure to dry heat IEC 60068-2-2 Bb +70 °C 

Continuous exposure to damp heat IEC 60068-2-3 Ca 56 days; 93 % RH; 40 °C 

Safety IEC / EN standard Level / Class Value 

Enclosure safety tests 

Front panel tightness IEC 60529 IP52 Other panels closed, except for 

rear panel IP20 

NEMA Type 12 

with gasket supplied 

Fire withstand IEC 60695-2-11 650 °C with glow wire 

Electrical safety tests 

Earth continuity IEC 61131-2 30 A 

1.2/50 µs impulse wave IEC 60255-5 5 kV (2) 

Power frequency dielectric withstand IEC 60255-5 2 kV 1 mn (3) 

Certification 

e Harmonized standard: EN 50263 European directives: 

b 89/336/EEC Electromagnetic Comptability (EMC) Directive 

v 92/31/EEC Amendment 


b 73/23/EEC Low Voltage Directive 


UL - UL508 - CSA C22.2 n° 14-95 File E212533 

CSA CSA C22.2 n° 14-95 / n° 94-M91 / n° 0.17-00 File 210625 

(1) Results given for intrinsic withstand, excluding support equipment 

(2) Except for communication: 3 kV in common mode and 1kV in differential mode 

(3) Except for communication: 1 kVrms 

(4) Sepam must be stored in its original packing. 

-25 °C 

+70 °C 

39

Order form 

Breakdown of base units into 

basic references 


and Sepam series 40 

A ready-to-use Sepam series 20 base unit can be broken down into: 

b hardware components: 

v 1 bare base unit 

v 1 20-pin connector 

v 1 current or voltage connector, according to the application 

b software components: 

v 1 application file 

v 1 working language file 

A ready-to-use Sepam series 40 base unit can be broken down into: 

b hardware components: 

v 1 bare base unit 

v 1 20-pin connector and 1 6-pin connector 

v 1 current connector 

b software components: 

v 1 application file 

v 1 working language file. 

DE51027 

Hardware components 

Base unit 

Basic UMI. 

DE51028 

Advanced UMI. 


With basic UMI S10UX 59603 

With advanced UMI S10UD 59607 


With basic UMI S10MX 59600 

With advanced UMI S10MD 59604 

Reference 

DE50963 

Connectors 

DE50962 

20-pin screw-type connector CCA620 59668 

20-pin ring lug connector CCA622 59669 

6-pin screw-type connector CCA626 59656 

6-pin ring lug connector CCA627 59657 

CCA620. 

CCA622. 

DE50958 

Current connectors and voltage connector 

DE50959 

DE50961 

1 A / 5 A CT current connector CCA630 59630 

LPCT lateral current connector CCA670 59631 

VT voltage connector CCT640 59632 

CCA630. CCA670. CCT640. 

Software components 

Application 

Working language 


Substation S20 59620 

Transformer T20 59621 

Motor M20 59622 

Busbar B21 59624 

B22 59625 


Substation S40 59680 

S41 59681 

S42 59682 

Transformer T40 59683 

T42 59684 

Motor M41 59685 

Generator G40 59686 


English / French 59610 

English / Spanish 59611 


English / French 59615 

English / Spanish 59616 

Reference 

41

Order form 

Order form 



Use the order form to order a complete Sepam with accessories. 

Indicate the requested quantities in the spaces 

Specify the requested characteristics by selecting the boxes that match your 

choice. 

DE51028 

DE51027 

DE51028 

DE51027 

Sepam series 20 base units 

With advanced User Machine Interface 

With basic User Machine Interface 


Sepam series 40 base units 

With advanced User Machine Interface 

With basic User Machine Interface 


Application Type Sensor 

Substation S20 1 A / 5 A LPCT 

Transformer T20 1 A / 5 A LPCT 

Motor M20 1 A / 5 A LPCT 

Busbar B21 VT 

B22 

VT 




Motor M20 1 A / 5 A LPCT 

Busbar B21 VT 

B22 

VT 

Working language English/French English/Spanish 

Type of connectors Screw-type Ring lugs 

Note: Each Sepam base unit is delivered with the necessary connectors, without any accessory. 



S41 1 A / 5 A LPCT 

S42 1 A / 5 A LPCT 


T42 1 A / 5 A LPCT 

Motor M41 1 A / 5 A LPCT 

Generator G40 1 A / 5 A LPCT 



S41 1 A / 5 A LPCT 

S42 1 A / 5 A LPCT 


T42 1 A / 5 A LPCT 

Motor M41 1 A / 5 A LPCT 

Generator G40 1 A / 5 A LPCT 

Working language English/French English/Spanish 

Type of connectors Screw-type Ring lugs 

Note: Each Sepam base unit is delivered with the necessary connectors, without any accessory. 

42

Order form 

Order form 



Manuals 

Mounting accessories 

Sepam series 20 manual PCRED301005 FR EN 

Sepam series 40 manual PCRED301006 FR EN 

Mounting plate AMT840 59670 

DE50942 

AMT840. 

DE50946 

Software tools 

PC setting and operating with CCA783 cord Kit SFT2841 59671 

and SFT2826 

PC connection cord CCA783 59664 

DE50944 

Input / output modules 

10 inputs + 4 outputs 24-250 V DC MES114 59646 

10 inputs + 4 outputs 110-125 V DC / V AC MES114E 59651 

10 inputs + 4 outputs 220-250 V DC / V AC MES114F 59652 

DE50947 

DE50950 

MES114. 

Remote modules and cords 

DE50948 

DE50949 

8 temperature sensor module MET148-2 59641 

Analog output module MSA141 59647 

Remote advanced UMI module DSM303 59608 

Remote module connection cord L = 0.6 m CCA770 59660 

Remote module connection cord L = 2 m CCA772 59661 

MSA141. MET148-2. DSM303. Remote module connection cord L = 4 m CCA774 59662 

Communication accessories 

Sepam communication interfaces 

2-wire RS 485 network interface 

ACE949-2 59642 

(without CCA612) 

4-wire RS 485 network interface 

ACE959 59643 

(without CCA612) 

ACE937. ACE949-2. ACE959. Fiber optic interface (without CCA612) ACE937 59644 

Sepam/network interface connection cord 

L = 3 m 

CCA612 59663 

Converters 

RS 485 / RS 232 converter ACE909-2 59648 

RS 485 / RS 485 interface (AC) ACE919CA 59649 

ACE909-2. RS 485 / RS 485 interface (DC) ACE919CC 59650 

DE50953 

DE50954 

DE50963 

Sensors 

DE50951 

DE50952 

Core balance CTs 

Residual current sensor Ø120 mm CSH120 59635 

Residual current sensor Ø200 mm CSH200 59636 

Interposing ring CT for residual current input CSH30 59634 

CSH200. Core balance CT interface ACE990 59672 

LPCT accessories 

LPCT injection adapter ACE917 59667 

Remote LPCT test plug CCA613 59666 

Spare connectors 

Sepam 

20-pin screw-type connector CCA620 59668 

20-pin ring lug connector CCA622 59669 

6-pin screw-type connector CCA626 59656 

6-pin ring lug connector CCA627 59657 

1A / 5A CT current connector CCA630 59630 

LPCT lateral current connector CCA670 59631 

CCA620. CCA622. CCA630. CCA670. CCT640. VT voltage connector CCT640 59632 

MES modules 

Connectors for 2 MES114 and 2 MES120 Kit 2640 59676 

DE50962 

DE50958 

DE50959 

DE50961 

43

44 

Notes

Schneider Electric Industries SAS 

Postal address: 

Electrical Distribution Communication 

F - 38050 Grenoble cedex 9 

France 

Tel : +33 (0)4 76 57 60 60 

http://www.schneider-electric.com 

http://www.sepamrelay.com 

ART.08535 

As standards, specifications and designs change from time to time, please ask for confirmation 

of the information given in this publication. 

This document has been printed 

on ecological paper. 

Design: Ameg 

Publication: Schneider Electric 

Printed: 

04-2004 

PCRED301004EN/3 © 2004 Schneider Electric - All rights reserved

Sepam series 20 Sepam series 40 - POWERLAB

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