Scan Lab System Electrical Machines Laboratory - Terco

Scan Lab System 

Electrical Machines 

Laboratory

TERCO SCAN LAB SYSTEM 

For more than 40 years Terco has developed and sold electrical machines for technical education, 

and our systems are installed in schools all over the world. 

During the development of the Scan Lab System, we have put together all our expertise and 

experience and built the most complete system on the market. 

Scan Lab is completely modular, and the various modules can be bought separately and 

integrated as the demand arises. This enhances the use of Scan Lab and makes it flexible and 

economical. 

All the electrical machines as well as the power electronics have been chosen to take industrial 

standards into consideration. Terco Scan Lab is accurate. Too small electrical machines give 

unrealistic measuring values. We have carefully considered this by optimizing the winding data of 

the machines and by choosing an effect of approx. 400 W. The losses in percent for this size of 

machines, are not especially high compared with the total power. 

SAFETY 

All electric wiring is galvanically isolated and protected in case of wrong doing. The banana 

terminals are of safety type. 

SERVICE 

Terco have manufactured thousands of electrical machine systems for training purposes since 

the early sixties, systems, which have been delivered to countries all over the world. Most of the 

systems are still in operation. In spite of this fact it is not very often we have to carry out service 

or repair. However, should the need occur, our well trained service personnel will always be there 

to support you. 

QUALITY CONTROL 

All equipment is carefully checked and after approval provided with TERCO's well known quality 

mark, a sign of safety and security for our customers. 

TRAINING COURSES 

Terco organises training courses for most of the equipment both in house or at the customer's 

own site. Most of our courses are especially designed to teach you how to handle the equipment 

in the most efficient way. These courses are often a very good investment. 

DOCUMENTATION 

Every shipment includes comprehensive documentation including course literature and a teacher 

guide and manual.

Scan Lab System – Electrical Machines Laboratory 

Contents 

Page 

Terco Scan Lab System 2 

Brakes & Torque-measurements 4–5 

Test Machines 6–8 

Power Supplies 9 

Load Units 10 

Phasing Instruments 11 

Accessories 12–13 

Switch Panels 13 

Laboratory Flexes and Flex Stand 13 

Electrical Measuring Instruments 14–17 

Power Electronics and Drives 18–21 

Transformers 21 

Measuring and Data Acquisition with PC 22–23 

Equipment Lists 24–25 

Sectioned Motors 26 

Experiment Manuals 27 

Compact Drive 28–29 

Terco Electrical Machine Systems 30–31 

Laboratory Lay-out 32 

Electrical Power Distribution System 33 

Guarantee & Terms 34 

Terco reserves the right to make changes in the design and modifications or improvements of the products 

at any time without incurring any obligations. 

3


Brakes & Torque-measurements 

The measurement of the torque is vital when studying electrical machines. Specially important is to have high accuracy 

from zero revolutions to the top speed. Terco has developed two completely new measuring systems. One is an electric 

brake together with a DC-machine for simpler measurements, and one is a more advanced system with possibility of 

monitoring and control with PC. 

SM 2641 

SM 2643 

SM 

2613 

SM 

2613 

MV 1052 

SM 2640 

MV 1052 Torque Measuring Unit 

MV 1052 is a modern torque meter based on the latest computer technology. It comprises an opto electronic transducer 

and an electronic control and display unit. The transducer consists of a torsion shaft. The torsion is measured optically 

and is converted into torque. The speed is also measured and with a very high accuracy. The torquemeter works down to 

a relatively low speed. Torque, power and speed can be read easily on the display of the control units digital instruments. 

From the control unit the field windings of the test motors can be controlled via a potentiometer on the front, or by remote 

control. On the backpanel, there are outputs for plotter and computer. 

Technical Data 

Torque 

Max mech load 

Shaftpower 

Speed 

Brake control 

Output for plotter/PC 

Output for plotter/PC 

Speed 

Speed 

Torque 

Torque 

Shaftpower 

Shaftpower 

Power supply 

Shaft height 

Power supply 

0-10 Nm 

25 Nm 

2 kW 

120-4000 rpm 

Manually via pot. on front panel 

0-195 V DC, 2 A 

Remote with PC through 

5 V terminal 

at 2000 rpm 

5 V at 2000 rpm 

at 10 Nm 

5 V at 10 Nm 

at kW 

5 V at 2 kW 

220-240 V, 1-phase, 50-60 Hz 

100 mm 

220-240 V, 1-phase, 50-60 Hz 

Dimensions 

Accuracy 

Transducer Torque ≤ 300 2% x 200 x 150 mm 

Weight Power ≤ 4 2% kg 

Control Speed unit 

≤ 250 1% x 340 x 150 mm 

Weight 

5 kg 

Dimensions 

Transducer 

300 x 200 x 150 mm 

Weight 

4 kg 

Control unit 

250 x 340 x 150 mm 

Weight 

5 kg 

The same equipment is also available for our Classic 1 kW Electrical Machines with shaft height 162 mm. 

It is then called MV 1051. 

4


SM 2641 

SM 2643 

SM 2612 

SM 2640 

SM 2671 

SM 2671 Brake Control Unit 

The SM 2671 Brake Control Unit is designed to operate with one Terco DC-Machine + one Terco DC-Tacho Generator 

(e.g. SM 2641 + SM 2612). The Control Unit is trimmed against the chosen machine and tacho generator to make it 

possible to calculate the air gap torque in the DC-machine. With a tacho signal also speed and shaft power is calculated. 

The result is displayed by three LCD-instruments. 

Braking force is controlled by a potentiometer on the front. 

To facilitate full braking force at high, medium, low speeds and close to standstill, the braking resistor can be configurated 

by two jumpers placed in the front plate. The braking resistors are cooled by a built-in fan. 

SM 2671 can also be trimmed to already existing DC-machine and tachometer generator. 

Technical specifications 

Factory trimmings 

Against specified DC-machine and tacho 

Braking Power 

Max 1500 W 30 min. 

Speed indication 

0-4000 rpm 

Torque indication 

0-12 Nm 

Power indication 

0-2000 W 

Accuracy speed 0.5 % 

Accuracy Nm and W 

5 % or better 

Machine connections 

Four 4 mm safety terminals 

Tacho connections 

Two 4 mm terminals 

Size W x D x H 

480 x 330 x 210 mm (inclined front) 

Power supply 

220-240 V, 1-phase, 50-60 Hz 

Weight approx. 

9 kg 

Other input voltages available on request. 

5


Rotating machines – Motors & Generators 

The size of the machines is carefully chosen to optimise price and performance. In our opinion 400 watt machines are 

ideal. If the machines are smaller the performance of the machines will not be representative. The losses in percent are 

still not especially high compared with the total power. 

All machines have shaft height of 100 mm, and are provided with clutch, terminalbox with mimic diagram, 4 mm safety 

terminals and a baseplate enabling stepless fastening on the machine bed. 

Temperature safety class: vary between B to F (130-155°C). 

Machines running as generators and motors 

SM 2641 DC Machine with separate excitation winding 

This DC machine has an open shunt winding, enabling SM 2641 to be 

connected either for shunt excitation or for separate excitation, both as 

motor and generator. 

SM 2641 also has interpoles which improves the characteristics of the 

machine. It is ideal to use together with DC-converters. 


Power 

Armature voltage 

Armature current 

Excitation 

Temperature class 

Dimension 

Weight 

400 W at 1500 rpm/Max 3000 rpm 

0-300 V DC 

3.5 A DC 

190 V / 0.2 A 

F (155°C) 

400 x 250 x 200 mm 

17 kg 

SM 2643 DC Compound Machine 

This machine has a shunt and a series winding, and can be connected 

as shunt, series and compound motor or generator. It also has 

interpoles which improves the performance of the machine. 


Power: 

Motor 

Generator 

Rotor 

Excitation 


Dimension 

Weight 

400 W at 1500 rpm 

400 W at 1800 rpm 

160 V 3.7 A DC 

190 V 0.2 A DC 

F (155°C) 

400 x 250 x 200 mm 

16 kg 

SM 2646 DC Series Motor 

400 W att 2200 rpm, 3.7 A. 

Same design as SM 2643 above. 

SM 2649 Flywheel 

This is used in retardation tests for determining total friction losses, iron 

losses and short circuit losses at different excitation levels. The Flywheel 

is dynamically balanced and has a protective casing. 


Dimensions 

Weight 

1150 x 200 x 70 mm 

10 kg 

6


SM 2645 Slipring Synchronous/Asynchronous Machine 

This is a universal slip ring 3-phase AC machine which can run as a 

slip ring asynchronous motor, synchronous motor and synchronous 

generator. When running in synchronous mode the rotor will be excitated 

to 60 V / 3.5 A DC. During max. 30 min this can be increased to 5.5 A to 

show important parameters. 


Power 

500 W 

Speed 

1400 rpm / 50 Hz 

1700 rpm / 60 Hz 

Cos phi 0.8 

Stator voltage 

3 x 230 V AC 

Stator current 

2.3 A 

Rotor data 

3 x 230 V AC, 2.3 A (nom) 

Rotor excitation 

60 V DC, 5.5 A (max) 


F (155°C) 

Dimension 

400 x 250 x 200 mm 

Weight 

15 kg 

Machines operated mainly as motors 

SM 2644 Induction Motor Squirrel Cage 

This is a normal 3 phase squirrel cage asynchronous motor with 4 poles. 

With this motor not only the normal testing can be done, it is also suitable 

to use together with a frequency converter. 


Power 

370 W 

Speed 

1400 rpm / 50 Hz 

1700 rpm / 60 Hz 

Cos phi 0.7 

Voltage 

230 V / 400 V 

Current 

2.1 / 1.2 A 

Dimension 

270 x 230 x 200 mm 

Weight 

7 kg 

SM 2647 Reluctance Motor 

400 W at 1500 rpm. Same design as 2644 above. 

SM 2648 Universal Motor 

This motor is very useful. It can be connected both to AC and DC power. 

The rotor is, via brushes and commutators, connected in series with the 

field winding. 


Power 

370 W DC, 250 W AC 

Speed 

1500 rpm / 50 Hz 

Voltage 

230 V AC / DC 

Current 

2.5 A DC, 3.9 A AC 

Dimension 

300 x 250 x 200 mm 

Weight 

14 kg 

SM 2640 Machine Bed 

The machine bed is designed to house three 

machine modules in the SM 2600 module 

group. The bed is equipped with rubber feet 

and handles. 


Dimensions 1150 x 200 x 70 mm 

Weight 10 kg 

7


SM 2683 Dahlander Motor 

In this motor the windings are arranged in such a way that by using different 

connections the motor can run at two different speeds. Change of speed can 

be done with contactors or by a camswitch (SM 2694). 


Power 450 / 300 W 

Speed 1400 / 2700 rpm / 50 Hz 

1650 / 3200 rpm / 60 Hz 

Voltage D / YY 230 V 3-ph., 50-60 Hz 

Current 

Dimension 

Weight 

2.1 / 1.6 A 

300 x 230 x 200 mm 

9 kg 

SM 2684 1-Phase Induction Motor with Start 

and Run Capacitor 

This motor is equipped with two capacitors. The start capacitor is disconnected 

at halfspeed, but allows for a higher start torque, whilst the run 

capacitor is continuously connected and gives the motor good working 

torque. 


Power 370 W 

Speed 1400 rpm / 50Hz 

1670 rpm / 60 Hz 

Voltage 230 V 1-phase, 50-60 Hz 

Current 

Dimension 

Weight 

2.9 A 

300 x 290 x 200 mm 

10 kg 

SM 2685 1-Phase Induction Motor with Start Capacitor 

This motor is equipped with operating winding and start winding. For higher 

start torque the influence of the start winding is improved by use of a 

capacitor which is disconnected through a centrifugal switch when working 

speed has been reached. 


Power 370 W 

Speed 1400 rpm / 50 Hz 

1670 rpm / 60 Hz 


Current 

Dimension 

Weight 

4.4 A 

300 x 290 x 200 mm 

10 kg 

SM 2686 Split - Phase Motor 

A single phase motor having 2 windings. The start winding is disconnected 

by means of a centrifugal switch when the motor has reached a fraction of 

full speed. 


Power 250 W 

Speed 1400 rpm / 50 Hz 

1700 rpm / 60 Hz 


Current 

Dimension 

Weight 

3.1 A 

300 x 250 x 200 mm 

13 kg 

SM 2688 Two Speed Induction Motor Squirrel Cage 

This motor unlike SM 2683 has 2 separate windings for high and low speed. 


Power 350 / 300 W 

Speed 1400 / 900 rpm / 50 Hz 

1700 / 1100 rpm / 60 Hz 


Current 

Dimension 

Weight 

2.4/2.3 A 

300 x 230 x 200 mm 

9 kg 

8


Power Supplies 

Power supply is essential for all excercises with electrical machines. The Scan Lab power supply is designed in such 

a way that it can be used whenever power is needed within the school. 

The Power Panel is made as a seperate module which increases the flexiblility of Scan Lab. 

SM 2631 Power Supply Unit 

Comprises one isolated 3-phase main transformer and 

one variac transformer. The unit is mobil and connected 

through a multipole cable to Terminal Unit SM 2635. 

The voltage is varied by a knob on top of the unit. The 

starter is controlled from the Terminal Unit. Different AC 

and DC voltages are available from the Terminal Unit 

SM 2635 (see below). 


Primary supply 

(changeable) 

Primary fuses 

Output connector 

Connection 

Dimensions 

Weight 

3 x 400 V, 50-60 Hz 

3 x 230 V, 50-60 Hz 

3 x 4 A slow 

16-pole, 16 A 

European connector 16 A 

350 x 300 x 650 mm 

50 kg 

Note: The Power Supply Unit SM 2631 and the 

Terminal Unit SM 2635 are part of each other and do 

not work separately. 

SM 2635 Terminal Unit 

The Terminal Unit is connected to the Power Supply Unit 

SM 2631 by a multilead power receptacle. Since all heavy 

and bulky equipment, which normally goes together with 

a multifunction power supply, is placed in the Power 

Supply Unit, the Terminal Unit, which is quite light, can 

easily be placed on the laboratory table, beside, below or 

on top of other equipment close to the experimental units. 

The unit includes also a combined AC/DC machine starter. 


Fixed 3-phase voltage 

Variable 3-phase voltage 

Variable DC-voltage 

Fixed DC-voltage 

3 x 230 V with neutral, 

4 A, F fuses 

3 x 0-230 V with neutral, 

4 A, F fuses 

0-300 V 

6 A, F indirectly fused 

190 V 

2 A, F fuse 

Electronically controlled (phase) 

DC-voltage: 

0-190 V, 2 A, F fuse 

Electronically controlled (PWM) DC-voltage for excitation of 

AC-machine SM 2645 operating as synchronous machine: 

Output DC 

0-60 V, 5 A 

Fusing 

6 A, FF 

R-starter group 

3 steps + direct for DC/AC 

slipring machines 

Dimension 

490 x 135 x 340 mm 

Weight 

10 kg 

9


Load Units 

The loads are suitable to use with the Scan Lab System and other lab. experiments where these type of loads fit in. 

SM 2676 Load Resistor Module 

Load resistor SM 2676 contains 6 separate continuously variable resistors 

with individual terminals. To be used for variable 3-phase , 1-phase or 

DC loads. 


Resistance 

Rated current 

Max. cont. load 

Dimension 

Weight 

6 x 0-100 ohm 

6 x 1.8 A 

1.9 kW 

450 x 280 x 280 mm 

15 kg 

SM 2672 Capacitive Load Module 

This is a 3-phase capacitive load variable in 6 steps. 

The unit can be used both for three and single phase. 


Rated power 

2.7 kVAr 

Capacitance 3 x 48 µF 

0 + 6 steps 

Voltage 

250 V / phase AC 

Dimension 

250 x 340 x 150 mm 

Weight 

3.5 kg 

SM 2674 Inductive Load Module 

This is a 3-phase inductive load variable in 6 steps. The unit can be used 

both for three and single phase operation. 


Rated power 

Inductance 

Voltage 

Dimension 

Weight 

0.9 kVar 

0.2-1.5 H / phase 

0 + 6 steps 

140 V / phase 

250 x 340 x 150 mm 

14 kg 

SM 2637 VAr Controller 

This unit is designed to be used together with Terco synchronous 

machines rating 1-2 kVAr when these are used as VAr compensating 

units or run as motors / generators with voltage stabilising ability. 

Specifications 

Voltage feedback from controlled 

network 

Field winding controlled voltage 

Field winding controlled current 

Supply voltage (1-phase) 

Dim W x H x D 

Weight (approx.) 

3-ph 220-400 V 

0-170 V DC 

0-3 A (max) DC 

220-240 V AC 50 / 60 Hz 

250 x 340 x 150 mm 

7 kg 

10


Phasing Instruments 

SM 2670 Synchronizing Device 

The equipment includes 1 zero voltmeter, 1 circuit breaker, 3 signal 

lamps and terminal bolts. 

With SM 2670 it is an easy matter to synchronise synchronous machines 

to networks or to an other alternator. 

General Data 

Zero Voltmeter 

2 x 140 V 

Circuit Breaker 

16 A 500 V 

Synch. Lamps 

130 V with resistor 

Supply Voltage 

220-240 / 127-140 V, 50-60 Hz 

Dimensions 

315 x 240 x 90 mm 

Weight 

3 kg 

Other voltages can be supplied on request. 

MV 1909 Synchronizing Unit 

The unit includes 1 dual voltmeter, 1 dual frequency meter and a 

synchroscope. To switch the synchronised supplies together, load switch 

SM 2690 is required. 

General Data MV 1909-235 MV 1909-236 

Dual Voltmeter 2 x 250 V 2 x 250 V 

Dual Frequency Meter 44-56 Hz 54-66 Hz 

Synchroscope 

Supply Voltage 220-240 V / 220-240 V / 

127-140 V 127-140 V 

Dimensions 

350 x 140 x 160 mm 

Weight 

6.5 kg 

Phase Cop 2 Phase Sequence Indicator 

Tester for determining the direction of rotation or phase sequence in 

3-phase systems. 

- 3 LEDs indicate whether or not the 3-phase conductors are live 

- Very large voltage and frequency range 

- Simple operation 

- Rugged design 

- Permanently connected cables with contact-protected connector plugs, 

three plug-on test probes and one plug-on alligator clip 

General Data 

Voltage range 

Frequency 

Dimensions 

Weight 

90-660 V 

45-1000 Hz 

70 x 105 x 40 mm 

0.3 kg 

MV 1417 Terminal board with short-circuit buttons 

Combined terminal and protector board for instruments. Current coils of 

ammeters and wattmeters connected to the board through a normally 

short-circuited contact which is opened during measurement. Opening of 

the contacts for phase R, S, T is done with a robust push-button for each 

phase. Reading of the instrument can be done only when the button is 

pressed, which is of great advantage in the event of wrongly terminated 

instruments. The terminal board is 4-pole with six terminals, two jacks 

and three push-buttons marked R, S, T. 

Dimensions 

245 x 195 x 50 mm 

Weight 

1.5 kg 

11


Accessories 

SM 2636 AC & DC Starter 

This unit is a universal starter and can be used together with Scan Lab 

Systems DC machines, and also with SM 2645 which is a AC slip-ring 

motor. 


Dimensions 

Weight 

350 x 255 x 150 mm 

4 kg 

SM 2638 Shunt Rheostat DC 

To control field regulation of DC-machine SM 2641 and SM 2643. 


Max current 

Dimensions 

Weight 

0.3 A 

140 x 140 x 150 mm 

1 kg 

SM 2639 Shunt Rheostat 

To control rotor excitation of the slipring AC machine 

SM 2545 when this machine operates as a synchronous machine. 


Dimensions 

Weight 

215 x 190 x 230 mm 

7.5 kg 

SM 2612 Tachometergenerator 


DC tacho 

14 V / 1000 rpm 

Dimensions 

95 x 195 x 150 mm 

Weight 

1 kg 

SM 2613 Protective cover 

The same as SM 2612 but without tacho. 

SM 2625 Revolution Counter 

The instrument is enclosed in an universal case equipped with 

connecting terminals. 

SM 2625 is intended for use together with SM 2612 tachometer 

generator including protective cover. 

General Data 

Measuring range 

0-4000 rpm 

Data 

1000 rpm at 14 V 

Size of instrument 

144 x 144 mm 

Accuracy 1.5 % 

Dimensions 

195 x 165 x 165 mm 

Weight 

2 kg 

12


SM 2690 Load Switch 3-Phase 


Max. voltage 

500 V AC / 250 V DC 

Max. current 

16 A 

Dimensions 

95 x 200 x 80 mm 

Weight 

1 kg 

SM 2691 Reversing Switch 3-Phase 


Max. voltage 

500 V AC 

Max. current 

16 A 

Dimensions 

95 x 200 x 80 mm 

Weight 

1 kg 

SM 2692 Y / D Switch 


Max. voltage 

Max. current 

Dimensions 

Weight 

500 V AC 

16 A 

95 x 200 x 80 mm 

1 kg 

SM 2693 Selector Switch 3-phase 


Max voltage 

500 V AC / 250 V DC 

Max current 

16 A 

Dimensions 

95 x 200 x 80 mm 

Weight 

1 kg 

SM 2694 Dahlander Switch 


Max. voltage 

Max. current 

Dimensions 

Weight 

500 V AC 

16 A 

95 x 200 x 80 mm 

1 kg 

MV 1904 Flex Stand 

for up to 200 cables. For suspension of laboratory flexes. 

The stand has 12 slots between parallel tubes with space 

for 10-15 laboratory flexes in each slot. Flexes of length 

200 cm are suspended in a separate position above the 

stand. This rigid stand has a heavy steel plate pedestal. 


Height 1170 mm 

Weight 9 kg 

SM 2679 Set of experiments cables 

Safety leads with 2 covered spring plugs of 4 mm 

diameter, with stiff protection sockets covering the 

plugs, and 4 mm diameter axial bushings moulded 

with Polypropylen, fixed to 1.5 mm 2 copper thread, 

PVC isolateds, outer diameter 4 mm. 

Standard set SM 2679 

Length Black Red Yellow or White 

25 cm 4 4 4 

50 cm 4 4 4 

100 cm 6 6 6 

200 cm 2 2 4 

13


Electrical Measuring Instruments 

Terco Instruments are panel-type 96 x 96 mm, mounted in durable painted sheet metal enclosures having plastic feet. 

The instruments have a 90˚ scale and are produced for temperatures between -20 and +50˚C. 

Ammeters can take ten times the rated current for short duration and voltmeters twice the nominal voltage for a short 

period. Test voltage -2 kV, AC. All instruments comply with IEC recommendations. 

MV 1924 Ammeter 

This ammeter is a moving coil instrument with zero in the centre of the scale. It is 

used e.g. for determining the slip in slip-ring asynchronous machines. MV 1924 is 

connected in the rotor circuit in one of the leads between the motor and the rotor 

starter. By this means it is possible to determine the frequency and instantaneous 

value of the rotor current. The slip can then be calculated. 

General Data 


20-0-20 A (centre zero scale) 

Accuracy 1.5 

Scale length 

85 mm 

Dimensions 

220 x 117 x 90 mm 

Weight 

1.1 kg 


Moving iron instrument. 

Measuring ranges 

Accuracy class 

Dimensions 

Weight 




Accuracy class 

Dimensions 

Weight 

AC / DC 0-1-2 A 

2.5 

220 x 117 x 90 mm 

1.1 kg 

AC / DC 0-6-12 A 

2.5 

220 x 117 x 90 mm 

1.1 kg 

MV 1926 Voltmeter 



AC / DC 0-50-250-500 V 

Accuracy class 2.5 

Dimensions 

220 x 117 x 90 mm 

Weight 

1.3 kg 

MV 1974 Voltmeter 

Voltmeter, moving coil 


0-±300 V with centre zero scale. 


Dimensions 

220 x 117 x 125 mm 

Weight 

2 kg 

14


MV 1927 Wattmeter, single-phase 

Voltage ranges 

50-250-500 V 

Rated current 

1 A 

Supply voltage 

180-260 V AC 


Dimensions 

220 x 117 x 125 mm 

Weight 

2 kg 

MV 1928 Wattmeter, single-phase 

Voltage ranges 

50-250-500 V 

Rated current 

5 A 

Supply voltage 

180-260 V AC 


Dimensions 

220 x 117 x 125 mm 

Weight 

2 kg 

MV 1929 Power Factor Meter 

Three-phase instrument, symmetric load. 


cap. 0.5 ... 1 ... 0.5 ind. 

Current range 

0-5 A 

Voltage range 

220 V ± 20 % 3-phase 

Frequency range 

40-65 Hz 


Dimensions 

220 x 117 x 125 mm 

Weight 

2 kg 

MV 1976 Power Factor Meter 

Three-phase instrument, symmetric load. 


cap. 0.5 ... 1 ... 0.5 ind. 

Current range 

0-5 A 

Voltage range 

380 V ± 20 % 3-phase 

Frequency range 

40-65 Hz 


Dimensions 

220 x 117 x 125 mm 

Weight 

2 kg 

MV 1930 Frequency Meter 


46-54 Hz 


Dimensions 

220 x 117 x 90 mm 

Weight 

1.2 kg 

MV 1938 Frequency Meter 


56-64 Hz 


Dimensions 

220 x 117 x 90 mm 

Weight 

1.2 kg 

MV 1931 Current Transformer 

Primary 20-10-5 A / Sec. 1 A 


Dimensions 

220 x 117 x 135 mm 

Weight 

6 kg 

15


SM 2627 Universal Meter 

With this useful unit voltage, current and power with difficult waveforms 

can be measured individually with instantaneous value, TRMS value 

or average value on the display or through terminals. Signal values and 

signal terminals are galvanically isolated. The unit includes multiplexer 

with two channels to make it possible to study voltage, current and 

power on the same time on the display and also by an oscilloscope. 

The digital instrument shows all values in percent (0-199.9 %). 


Voltage 

20, 50, 100, 500 V, AC / DC 

Current 

1, 2, 5, 10 A, AC / DC 

Power 

20 steps 50-2000 W 

Instrument LCD 3 1 /2 digit 0-199.9 % 

Power supply 

230 V AC, 50-60 Hz 

Dimensions 

250 x 340 x 150 mm 

Weight 

2 kg 

SM 2628 3-phase/1-phase Measuring Unit, 

Voltage / Current / Power 

This unit is designed to be used together with Terco electrical machines 

rating 0.4-2 kVA. 

The instrument functions can be used also for DC-quantities. 


Voltage with selector switch LL or L neutral 

or DC-voltage 

Current selector switch IL1, IL2 or IL3 

Wattmeter for 1-ph or 3-ph (2-wattmeterm.) 

Wattmeter for DC 

Supply voltage (1-phase) 

Dimensions 

Weight 

1-phase/3-phase, 

127-400 V 

0-6 A 

0-4000 W (max) 

0-2000 W (max) 

220-240 V AC, 50-60 Hz 

250 x 340 x 150 mm 

6 kg 

SM 2629 Instrument Unit 

This unit is designed to be used together with the Terco Data 

Acquisition Unit SM 2607. Normally the three measuring groups U1, I1, 

P1, U2, I2, P2 and U3, I3, P3 are displayed on the PC-monitor. Here the 

indications are displayed on LCD-instruments by selector switches for 

unit and range. To be used when no PC is available. 


Selector switches for U1, U2, U3, I1, I2, I3, 

P1, P2 and P3 

Measuring ranges will be changed automatically via SM 2607 settings. 

Voltage range 

30-100-300 V 

Current range 

1-3-10 A 

Power range (indicated 0-199 %) 

6 scale combinations 

f.s.d. 30-3000 W 

Supply voltage via multi-lead cable from SM 2607 

Dimensions 

250 x 340 x 150 mm 

Weight 

6 kg 

16


MV 4212 Vector Visualizer Unit 

This unit is used together with an 

oscilloscope to show the Park vector 

of voltage, current, and stator flux. 

The resultant graphs show added 

information on the theoretical and 

actual function of the power supply 

converter which can be used for 

analysis, fault tracing, and for 

educational training. The supply voltage 

and current, can be studied as a 

function of time in conjunction with 

vector display. After setting the resistive 

loss compensation, the signal at the 

T-output is proportional to the electrical 

torque supplied. This gives unique 

information about the load torque which 

is not available in normal installations. 


Input voltage 

Max phase current 

Outputs 

Max output voltages 

Output impedance 

3 x 0-415 V RMS without neutral 

max ±500 V within linear range 

±1000 V top value. 

10 A ptp resp. 50 A ptp 

X and Y components to either 

U-, flux- or I-vector 

Time function U, and I 

Torque 

±10 V within linear range 

50 ohm 

Synch. pulse 

TTL level 

Bandwidth 

DC - 100 kHz 

RI-comp 0-10 % 

Power supply 

220-240 V, 50 / 60 Hz 

Dimensions 

350 x 120 x 300 mm 

Weight 

4 kg 

MV 1971 Diffprobe 

The Terco Diffprobe is used when readings are taken from 

an oscilloscope, and to effectively isolate the testobject from 

the oscilloscope. With the diffprobe it is also possible to 

readoff part voltages which are at different potentials. 


Max output voltage from 

the probe 


x10 

x100 

Power 

Frequency 

Impedance in 

Impedans out 

Offset voltage 

Dimensions 

Weight 

15 V ptp 

Input voltages up to 120 V ptp 

Input voltages up to 1200 V ptp 

Two 9 V batteries 

DC - 1 MHz 

1 Mohm 

500 ohm 

Max 5 mV 

120 x 65 x 40 mm 

250 g incl. batteries 

17


Power Electronics & Drives 

Terco has developed a complete system for learning Power Electronics suitable for Scan Lab. 

The system includes modules which can be integrated independently into Scan Lab or other similar systems. A lot of care 

has been taken to make the modules as easy to use and understand as possible. 

SM 2678 Basic AC/DC Control Module 

The Basic AC/DC Control is designed to be the first module 

linking the power source to a load using SCRs to control - 

without feed-back - the AC- or DC-voltage in order to study 

the corresponding phenomena caused by phase control 

together with separate or mixed R-, L- or C-loads. 


Component blocks included: 

- Diode 

- Diode bridge 

- Triac (including diac) 

- Control potentiometer 

- Resistive load bank 

- Capacitive load bank 

- Inductive load bank 

- Overvoltage protections 

- Automatic free-wheeling devices 

Power supply 

220-240 V 1-phase AC, 50-60 Hz 

Dimension 

250 x 340 x 150 mm 

Weight 

4 kg 

To study the signals the SM 2678 is normally connected 

to the measuring module SM 2607. If this module is not 

available SM 2678 should be supplied from an isolating 

transformer 230 V, > 100 VA which will make it possible to 

use a standard 2-channel oscilloscope instead. 

SM 2658 PWM DC-Machine Control Module 

The unit is designed using MOSFET technology and shows 

how to optimize: 

- Speed 

- Control 

- Efficiency 

on a DC-machine during dynamic conditions. The control 

parameters - frequency, current and pulse width - can be 

controlled manually, from a function generator or from a PC. 

Parameters are selected by individual switches. Signal 

terminals (0-10 V DC) are galvanically isolated from power 

circuits. 


Function principal 1-quadrant 

Max current 

6 A 

Terminal for excitation 190 V / 2A 

Duty cycle 0-100 % 

Frequency 

200-13000 Hz 

Current limit 0-100 % 

Loads 

R/L active and passive 

Control signal 

0-10 V 

Power supply 

220-240 V 1-phase AC, 50-60 Hz 

3 x 230 V 3-phase AC, 50-60 Hz 

Dimension 

250 x 340 x 150 mm 

Weight 

6 kg 

18


SM 2651 1 Q DC-Control Module 

The Scan Lab Rectifier Module operates in armature voltage 

or tacho feedback mode as well as in open loop mode. It is 

partly self adapting, and for this reason optimum stability can 

be adjusted with the aid of only one potentiometer on the 

front. 


Principle of operation 

Output voltage 

Output current 

Excitation 

Feedback 

Input voltage (supply) 

1-Q self adapting 

0-170 V DC 

6 A 

190 V 2A 

Tacho generator or 

armature voltage 

220-240 V 1-ph. AC, 50-60 Hz 

Parameters 

- Speed 

- Current limit 

- Stability (Gain) 

- RI compensation 

- Ramp up and down (Time) 

- Speed max and min 

Dimensions 

250 x 340 x 150 mm 

Weight 

4 kg 

SM 2652 4 Q DC-Control Module 

Scan Lab 4 Q DC-Control Module is a 

rectifier that operates in open loop, 

armature voltage feedback, tacho feedback 

or torque feedback mode. The 

rectifier includes overload and low speed 

relays as well as a disconnectible 

smoothing inductance. The unit has both 

subcycle and delayed overload protection. 

Operation modes 

- Armature voltage feedback with forward 

and reverse selection. 

- Ramped input or tacho feedback with 

bi-directional control (joystick) from the 

speed control potentiometer, with direct 

input of reference signal (no ramp). 



Output Voltage 

Output current 

Excitation 

Feedback 

Input voltage (supply) 

4-Q double full bridges 

0-170 V 

6A 

190 V 2A 

Tacho generator or 

armature voltage 

220-240 V 1-ph. AC, 

50-60 Hz 

Parameters 

- Speed 



- RI compensation 

- Ramp up and down (Time) 

- Speed max and min 

Dimensions 

440 x 340 x 135 mm 

Weight 

7 kg 

19


SM 2661 AC-Control Module 

This Scan Lab AC Control Module is a PWM flux vector 

type frequency control, controlled by a microprocessor. 

All power components are based on MOSFET technique. 

Operating characteristics as well as braking method are 

internally programmable. 


Principle of operation PWM-flux vector 

Output voltage 

3 x 0-300 V AC, 0-100 Hz 

Output power 

400-750 W 

DC-link over voltage Blocking of inverter bridge 

Braking chopper Optional (SM 2668) 

Input voltage (supply) 3 x 220-240 V AC, 50-60 Hz 

Parameters 

- Speed 


- Start voltage boost 

- Ramp up/down 

- Speed max / min. 

Dimensions 

Weight 

250 x 340 x 150 mm 

6 kg 

SM 2668 Brake Chopper Module 

The Scan Lab Brake Chopper Module is used together 

with the AC-Control Module SM 2661 to provide a semi 

4 Q mode of operation for induction motors. It is suitable 

for testing both generators and motors in clockwise or 

anti clockwise direction. Together with SM 2652 DC- 

Control Module it is possible to mechanically synchronize 

a DC-machine with an AC-machine and investigate the 

full mechanical and electrical characteristics of both 

machines, operating as motors as well as generators. 


Brake voltage 

(from SM 2661) 

Control voltage 

Mains supply voltage 

Size of test machine 

Dimension 

Weight 

300-380 V DC 

0-5 V DC 

220-240 V 1-phase AC, 

50-60 Hz 

Max 500 W 

250 x 340 x 150 mm 

4 kg 

20


SM 2593 Softstarter 

By use of Softstarter SM 2593 current peaks can be avoided when starting AC-machines. This unit can also be used 

together with Compact Drive SM 2500. 



Voltage 

Max motor power 

Elliptical torque control 

through antiparallell triacs 

3 x 230 V AC, 50-60 Hz 

2 kW 

Starting torque 0-50 % 

Starting ramp 

0.5-5.0 sek. 

Dimensions 

150 x 200 x 100 mm 

Weight 

2 kg 

SM 2675 Diode Module 

The diode module comprises nine power diodes, arranges in the blocks D1, D2 and D3, and one fast switch diode D4 

with suitable connections and jumpers to make it possible to study: 

1. Single diode operation 

2. Two way transformers rectifier 

3. Single phase bridge 

4. Three way three pulse transformer rectifier 

5. Three phase bridge 

6. Six way six pulse transformers rectifier 

7. Free-wheeling diode for PWM DC-converters 

8. Voltage multiplier 


Dimensions 

Weight 

250 x 340 x 150 mm 

4 kg 

Transformers 

SM 2680 1-Phase Transformer 

Suitable as stand alone exercise unit or to be used together with Scan 

Lab System. 


Ratio 

Current 

Power 

P O 

Dimensions 

Weight 

230/2 x 115 V 

2A / winding 

460 VA 

23 W 

165 x 145 x 205 mm 

8 kg 

SM 2681 3-Phase Transformer 

Suitable as stand alone exercise unit or to be used together with Scan 

Lab System. 


Ratio 

3 x 133 / 6 x 115 V 

Connection forms 

Y/Y 230/200 V, Y/D 230/230 V, D/D 133/230 V 

Y/Y 230/200 V, D/Y 133/200 V, Y/Z 230/230 V 

Power 

800 VA 

P O 

27 W 

Current: 

2 A / winding 

Dimensions: 

225 x 140 x 235 mm 

Weight: 

14 kg 

21


Measuring and Data Acquisition with PC 


The increased The increased use use and and availability of of computers in in the the schools made it it natural to adopt our Classic Scan Lab System to to 

this this environment. Terco Terco has has developed equipment and and software for measuring, control and acquisition of of important 

parameters. 

SM 2607 Measuring, Data Processing & Control Unit 

SM2607 consists of two main blocks: the measuring module and the data processing unit together with the PC-interface. 

They are built into a sturdy steel enclosure on which the experiment connections are easily made on the front panel. 

Connections to a PC or other instrument groups are made from the rear. 

SM The 2607 measuring Measuring, module Data consists Processing of three complete & Control measuring Unit groups, each one with voltage and current inputs together 

with electronics for analogue calculating of mean values and RMS values together with power expressed as W or VAr. 

SM 2607 The six consists inputs (3xvoltage of two main and blocks: 3xcurrent) the measuring are galvanically module isolated and the from data the signal processing circuits unit by together a 1.5 kV isolating with the barrier PC-interface. 

They The are analogue built into measuring a sturdy steel channels enclosure processes on which AC, DC the or experiment mixed quantities. connections are easily made on the front panel. 

Connections to a PC or other instrument groups are made from the rear. 

If not operating together with a PC the measuring module can be 

The measuring used together module with an consists external of instrument three complete box (SM2629, measuring optional) groups, each one with voltage and current inputs together 

with where electronics three for LCD analogue instruments calculating plus selector of mean switches values are and used RMS to values together with power expressed as W or VAr. 

The six perform inputs the (3 readouts x voltage in and percents 3 x current) are galvanically isolated from the signal circuits by a 1.5 kV isolating barrier. 

The analogue (0-199,9%). measuring channels processes AC, DC or mixed quantities. 

In this case connections are performed by a multiple lead cable 

If not operating together with a PC the measuring module can be used together with an external instrument box (SM 2629, 

together with a multiple contact placed in the rear plate of the 

optional) where three LCD instruments plus selector switches are used to perform the readouts in percents (0-199.9 %). 

SM2607. The cable is included in the code number SM2629. 

In this case connections are performed by a multiple lead cable together with a multiple contact placed in the rear plate of 

the SM 2607. The cable is included in the code number SM 2629. 

Technical specifications for the measuring module 

Technical Analogue specifications inputs: for the measuring modulenumber of channels 

Voltage, ranges 30 V, 100 V, 300 V 3 

Analogue inputs: 

AC or DC or mixed number of channels 

Voltage, Current, ranges ranges 30 1 A, V, 3100 A, 10 V, 300 A V 3 3 

PC-monitor : Measurements initiated. 

AC or or DC or mixed 

Current, ranges 1 A, 3 A, 10 A 3 

Analogue outputs: AC or DC or mixed 

Voltage mean value +/- 10 V, buffered 3 

Analogue Voltage outputs: RMS value +/- 10 V, buffered 3 

Voltage Voltage, mean immediate value value ± +/- 10 10 V, V buffered 3 3 

Voltage Current RMS mean value value ± +/- 10 10 V, V, buffered 3 3 

Voltage, Current immediate RMS value value ± +/- 10 10 V V, buffered 3 3 

Current Current, mean immediate value value ± +/- 10 10 V, V buffered 3 3 

Current Power RMS W/VAr value ± +/- 10 10 V, V, buffered 3 3 

Current, 

Output 

immediate 

impedance 

value ± 

< 

10 

10 

V 

kohm 

3 

Power W/VAr ± 10 V, 3 

Accuracy 1 % 

Output impedance 

< 10 kohm 

Frequency response 

within the accuracy 20 kHz 

Accuracy 1 % 

Voltage input impedance > 1Mohm 

Frequency 

Current 

response 

input impedance 0,1-1 ohm 

Programming mode 

within the accuracy 20 kHz 

Voltage input impedance > 1 Mohm 

Current input impedance 0.1-1 ohm 

PC-monitor: Measurements initiated. 

22


Technical specifications for the data acquisition module 

Technical specifications for the data acquisition module 

Analogue Analogue internal internal inputs: inputs: 

number number of channels of channels 

Corresponding 

Corresponding 

to 

to 

all 

all 

output 

output 

channels 

channels 21 

21 

from 

from 

the 

the 

measuring 

measuring 

module 

module 

above 

above 

Analogue external in- and outputs: 

Analogue external in- and outputs: 

Frequency* 0-10 V 1 

Frequency* 0-10 V 1 

Torque* ± 10 V 1 

Torque* ± 10 V 1 

Speed* ± 10 V 1 

Speed* ± 10 V 1 

Shaft 

Shaft 

power* 

power* 

± 10 

± 10 

V 

V 1 

1 

(* or 

(* or 

any 

any 

feedback 

feedback 

signal) 

signal) 

Aux. Aux. Inputs Inputs ± 10 ± 10 V V 3 3 

Analogue Analogue outputs (control) ± 10 ± 10 V V 1 1 

Output Output impedance 

< 10 < 10 kohm kohm 

Program mode including formulas 

PC-monitor: An experiment being set up. 

Power inputs are connected by safety terminals. 

Power Outputs inputs are are constituted connected by 4 by or safety 2 mm terminals. pin connectors for buffered signals 

and are by constituted BNC connectors by 4 or for 2 immediate pin connectors values. for buffered signals and by BNC connectors for immediate values. 

Communication between the the SM SM2607 and the PC is is performed by by a a standard type parallel port. 

Outputs 

No standard extra sub Serial units port have (RS to 232). be installed in the PC. 

The No data extra acquisition sub units have module to be in installed the SM 2607 in the is PC. based on a MAXIM microprocessor. The unit is tailored to suit Terco 

modules The data like acquisition MV 1052 module (Torque in Meter the SM2607 System) is but based can on also a Motorola be used microprocessor. 

inputs and outputs The unit have is tailored standard to suit signal Terco levels. 

with other objects via BNC, 2 mm and 4 mm terminals. 

All 

modules like MV1051 (Torque Meter System) but can also be used with 

Power other supply objects via BNC, 2 mm and 220-240 4 mm terminals. V 1-phase AC, 50-60 Hz 

All inputs and outputs have standard signal levels. 

Dimensions 

490 x 200 x 350 mm 

Weight 

Power supply 

7.5 

230 

kg 

V AC, 50-60 Hz 

Dimensions 

490 x 200 x 350 mm 

Weight 

7.5 kg 

SM 2609 Data Collecting Software 

Measured and calculated values 

SM 

To be 

2609 

used 

Data 

together 

Collecting 

with SM2607 

Software 

and a PC for collecting and valuating 

of experimental values. Data processing 

To can be be used done together simultaneously with SM with 2607 feedback and a PC control for collecting of, for example, and valuation of experimental values. Data processing 

can torque be done or speed simultaneously or for any controlled with feedback situation. control of for example torque or speed or for any controlled situation. 

The The characteristics of a machine can automatically be be collected 

through programmed control and data processing. 

The through software programmed is designed control to let and the data user processing. define the 

experiment The software setup is designed by himself. to let Together user with define an the amount exper-oiment 

setup experiments by himself. tailor Together made with for an the amount Terco Electrical of 

standard 

Machine standard Laboratory. experiments, tailor made for the Terco Electrical 

There Machines are the Lab. following Following program program modules modules available: are available: 

A. Table generator. 

A. B. Table Data generator. acquisition defined by the Table generator. 

B. C. Data On-line acquisition readouts defined (instruments) by the of Table values generator. defined 

C. On-line by the Table readouts generator. (instruments) of values defined 

D. by Print-out. the Table generator. 

D. E. Print-out. File processing: save/load table format, table, graph. 

E. F. File Export: processing: Export of save/load tables and/or table graphs format, for table, other graph. 

F. Export: program Export processing. of tables and/or graphs for other 

program processing. 

SM 2609 comprises 3.5˝ discs and manual. 

SM No 2609 computer comprises cards are 3.5˝ necessary. discs and manual. 

No computer cards are necessary. 

Print out of results 

23


Equipment Lists 

Torque Meter Set, Digital (MV 1052) 

MV 1052 Torque, Speed and Power Meter (Digital) 

SM 2641 

SM 2613 

DC Machine, sep. Shunt Winding (2) 

Shaft Protective Cover (2 pcs) 


SM 2643 DC-Machine, Compound, Shunt, Series 

SM 2644 Asynchronous Machine, Squirrel-Cage 

SM 2645 Asynchronous Machine, Slip Ring/ 

Synchronous Machine 

SM 2672 Capacitive Load Bank, 3-phase and 1-phase 

SM 2674 Inductive Load Bank, 3-phase and 1-phase 

SM 2676 Resistive Load Bank, 3-phase, 1-phase 

and DC 

SM 2631 Power Supply Module 

SM 2635 Terminal Board for SM 2631 

SM 2670 Synchronizing Module 

SM 2690 Load Switch 

SM 2691 Reversing Switch 

SM 2692 Star / Delta Switch 

SM 2679 Set of Experiment Leads, Safety type 


Brake Set (SM 2671) 

SM 2671 Brake Control Unit 

SM 2641 

SM 2612 

DC Machine, sep. Shunt Winding (2) 

DC-Tachometergenerator with Cover 


SM 2643 DC-Machine, Compound, Shunt, Series 

SM 2644 Asynchronous Machine, Squirrel-Cage 

SM 2645 Asynchronous Machine, Slip Ring/ 

Synchronous Machine 

SM 2672 Capacitive Load Bank, 3-phase and 1-phase 

SM 2674 Inductive Load Bank, 3-phase and 1-phase 

SM 2676 Resistive Load Bank, 3-phase, 1-phase 

and DC 

SM 2631 Power Supply Module 

SM 2635 Terminal Board for SM 2631 

SM 2670 Synchronizing Module 

SM 2690 

SM 2691 

Load Switch 

Reversing Switch 

SM 2692 Star / Delta Switch 

SM 2679 Set of Experiment Leads, Safety Type 


24


Additional Test Machines 

SM 2648 

SM 2683 

SM 2694 

SM 2684 

SM 2685 

SM 2686 

SM 2688 

SM 2649 

Universal Motor 

Induction Motor Dahlander 

Dahlander Switch 

Induction Motor Cap. Start & Run 

Induction Motor Capacitor Start 

Induction Motor Split Phase 

Asynchronous Machine, 2 sep windings 

Flywheel 

Transformers 

SM 2680 

SM 2681 

Single-Phase Transformer 460 VA 

Three-Phase Transformer 800 VA 

Instruments, analogue 

MV 1922 Ammeter, Moving Iron Instrument 

0-1-2 A, AC/DC 

MV 1923 Ammeter, Moving Iron Instrument 

0-6-12 A, AC/DC 

MV 1924 Ammeter 20-0-20 A 

MV 1926 Voltmeter 0-50-250-500 V, AC/DC 

MV 1928 Wattmeter 5 A 50-250-500 V, 1-phase (2 pcs) 

MV 1929 Power Factor Meter 3-phase 230 V 

(alternatively MV 1976, 3-phase, 400 V) 

MV 1930 Frequency Meter, 46-54 Hz 

(alternatively MV 1938, 60 Hz) 

Phase Cop 2 Phase Sequence Indicator 

Instruments, digital 

SM 2627 Universal Measuring Unit 

SM 2628 Measuring Unit 3-phase/1-phase/DC (U, I, P) 


SM 2607 

SM 2609 

SM 2629 

Measuring, Data Processing & 

Control Unit 

Data Collecting Software 

The reading of ”instruments” will be 

at the PC-monitor. If a PC is not used, 

the values can be read on SM 2629. 

Instrument Unit U, I, P 

Power Electronics 

SM 2678 

SM 2658 

SM 2651 

SM 2652 

SM 2661 

SM 2668 

SM 2675 

SM 2593 

Basic AC / DC Control Module 

MOSFET - PWM Module 

Rectifier Module 1 Q 

4-Q Converter 

Frequency Control Module 

Semi Four Quadrant Unit 

Diode Module 

Softstarter 

25


Sectioned Motors 

Sectioned Motors and Transformer 

MV The 1006-C machines DC are Machine sectioned about 90˚ allowing all the main components to be 

This demonstrated machine is cut-away clearly and to in show an educational commutator, way. brushes, rotor, stator, 

windings, 

Please 

ball-bearings. 

note : It is not possible to do any practical experiments with the machines 

The machine 

and 

is 

transformer. 

sectioned about 90˚ allowing all the main components to 

be demonstrated clearly and in an educational way. 

Please note : It is not possible to do any practical experiments with this 

machine. MV 1006-C DC Machine 

Rated This power machine is cut-away to show 1.0 commutator, kW brushes, rotor, stator, windings, 

ball-bearings. 

Dimensions 

465 x 300 x 310 mm 

Shaft Rated height power 1.0 kW 162 mm 

Weight Dimensions 465 x 300 x 310 40 mm kg 

Shaft height 162 mm 

MV1006-C 

Weight 40 kg 

MV 1008-C Synchronous Machine 

This machine is cut-away to show slip-rings, brushes, rotor, stator, 

windings, poles, ball-bearings etc. 

MV 1008-C Synchronous Machine 

The machine is sectioned about 90˚ allowing all the main components to 

be demonstrated 

This machine 

clearly 

is cut-away 

and in 

to 

an 

show 

educational 

slip-rings, 

way. 

brushes, rotor, stator, windings, 

poles, ball-bearings etc. 

Please note: It is not possible to do any practical experiments with this 

Rated power 

1.0 kW 

machine. 

Dimensions 

465 x 300 x 310 mm 

Rated Shaft power height 

1.0 kW 162 mm 

Dimensions 

465 x 300 x 310 mm 

Weight 

35 kg 

Shaft height 

162 mm 

Weight 

35 kg 

MV 1007-C Induction Motor Slip-Ring 

MV1008-C 

MV This 1007-C motor is Induction cut-away to Motor show slip-rings, Slip-Ring brushes, rotor, stator, windings, 

This 

poles, 

motor 

fan, 

is cut-away 

ball-bearings, 

to show 

etc. 

slip-rings, brushes, rotor, stator, 

windings, Rated power poles, fan, ball-bearings, etc. 1.1 The kW motor is sectioned about 

90˚ Dimensions allowing all the main parts to be demonstrated 440 x 300 x 350 clearly mm and in an 

educational Shaft height way. 

162 mm 

Please Weight note: It is not possible to do any 37 kg practical experiments with this 

machine. 

Rated power 

1.1 kW 

Dimensions 

MV 1009-C Induction 

440 

Motor 

x 300 

Squirrel 

x 350 mm 

Cage 

Shaft This height motor is cut-away to show 162 rotor, mm stator, windings, poles, fan, 

ball-bearings, etc. 

Weight 

37 kg 

Rated power 

1.1 kW 

Dimensions 

355 x 300 x 310 mm 

MV1009-C 

Shaft height 

162 mm 

Weight 

15 kg 

MV 1009-C Induction Motor Squirrel Cage 

This motor is cut-away to show rotor, stator, windings, poles, fan, 

ball-bearings, MV 1915-C etc. The Three-phase motor is sectioned Transformer 

about 90˚ allowing all the main 

parts This to be transformer demonstrated is cut-away clearly to and show in an the educational windings, coils, way. terminals, insulation, 

Please iron note core : etc. It is not possible to do any practical experiments with this 

machine. Rated power 

2 kVA 

Rated 

Dimensions 

power 

1.1 kW 

300 x 190 x 345 mm 

Dimensions Weight 

355 x 27300 kg x 310 mm 

Shaft 

Other 

height 

electrical machines and 

162 

transformers 

mm 

than those above can be cutaway 

on request. 

15 kg 

Weight 

MV1915-C 

Other electrical machines than those above can be cut-away on request 

26


Experiment Manuals and Teachware 

The equipment listed in this brochure is designed especially for educational purposes. The motors, generators, load units 

and power supply units are interchangeable so that in addition to the listed experiments it is also possible to demonstrate 

installation wiring requirements, meter connections, motor symptoms during overload and many other important 

conditions necessary in different syllabi. 

A brief synopsis of experimental coverage is given below. 

Examples of Experiment Manuals. 

Introduction to Scan Lab System 

Measurements and Electrotechnical Definitions 

Power Supply 

Load Units 

Electrical Machines and Brake Control 

Basic Theory of Electrical Machines 

DC-machines 

AC-machines 

Experiment Manual, Scan Lab System, Part 1 

DC-generator 

DC-motor 

Synchronous Motor and Generator 

Squirrel Cage Induction Motor 

Induction Machine as Generator 

Slip-ring Induction Motor 

Experiment Manual, Scan Lab System, Part 2 

Universal Motor 

Dahlander Motor 

Two Speed Squirrel Cage Induction Motor 

Split-phase Induction Motor 

Single-phase Induction Motor 

Instructors Guide to Scan Lab System 

Practical Function Control 

Electrical Machines - Part 1 

Electrical Machines - Part 2 

The foundation block on the modular system can be different Torque Measuring Systems: 

1. Torque and Power Meter MV 1052 together with prime mover or brake unit SM 2641. 

2. Brake Control Unit SM 2671 together with prime mover or brake unit SM 2641. 

3. DC-Machine SM 2641 (alt. SM 2643) for more simplified experiments on motor / generators. 

The above systems can be coupled to the Terco test machines on the Terco Machine Bed SM 2640. 

27


Compact Drive 

A compact teaching system for electrical machines and speed regulation 

Compact Drive 

With this equipment it is possible 

to study typical industrial cases 

concerning motor drives of industrial 

design: 

SM 2552 SM 2561 

- AC machine with and without 

frequency converter 

- DC Machine with 4-Q Converter 

In case you would like to extend 

the use of Compact Drive to more 

advanced experiments, Compact 

Drive can be upgraded with products 

from our Scan-Lab Series. 

The frame SM 7801 is built up on a 

mobile cart with lock-up wheels. 

On the bottom we have placed the 

machine bed with the AC- and DCmachines. 

On the upper panel we 

have placed all the electronic 

equipment such as converters. 

Measuring equipment can be placed 

on a removable shelf. 

The equipment is to be connected to 

single-phase 230 V AC, 50-60 Hz. 

An electrical distribution box with 

sockets for feeding of converters and 

measuring system is included. 

SM 2501 

SM 2641 

SM 

2612 

SM 7801 

SM 2644 

SM 2540 

28


The Compact Drive includes the following equipment: 

SM 7801 Mobile frame 

In gray enamelled steel with lock up wheels. 

Dimension 

980 x 610 x 1620 mm 

Weight 

35 kg 


Dimension 

870 x 300 x 120 mm 

Weight 

5 kg 

SM 2501 Measuring Unit 

Specially designed for Compact Drive. This unit is measuring 

torque, speed and shaftpower. 

Dimension 

350 x 260 x 145 mm 

Weight 

4 kg 

SM 2644 Induction Motor Squirrel Cage 

This is a standard 3 phase squirrel cage asynchronous 

motor with 4 poles. With this motor not only the normal 

testning can be done but it is also suitable for use together 

with a frequency converter. 

Technical Data. See page 7. 

SM 2641 DC Machine with separate 

excitation winding 

This DC machine has an open shunt winding, enabling 

SM 2641 to be connected either for shunt excitation or for 

separate excitation, both as motor and generator. SM 2641 

also has interpoles which improves the characteristics of 

the machine. It is ideal to use together with DC-converters. 


SM 2593 Softstarter 

By use of Softstarter SM 2593 current peaks can be avoided. 


SM 2579 Flex set 

Laboratory flexes with safety plugs. 

Length Black Red Yellow 

550 cm 2 2 3 

100 cm 4 4 3 

SM 2612 Tachometergenerator 


DC tacho 

14 V / 1000 rpm 

Dimension 

95 x 195 x 150 mm 

Weight 

1 kg 

SM 2552 4-Q DC Control Module 

This Unit is a rectifier thats operates in open loop, armature 

voltage feedback, tacho feedback or torque feedback 

mode. The rectifier includes overload and low speed relays 

as well as a disconnectible smoothing inductance. The unit 

has both sub-cycle and delayed overload protection. 

Operation modes: 

- Armature voltage feedback with forward and reverse 

selection. 

- Ramped input or tacho feedback with bi-directional 

control (joystick) from the speed control potentiometer, 

with direct input of reference signal (no ramp). 

Technical data 

Principle of operation 4-Q double full bridges 

Output voltage 0-170 V 

Output current 6 A 

Excitation 

190 V / 2 A 

Feedback 

Tacho generator or armature 

voltage 

Input voltage (supply) 220-240 V 1-phase AC, 50-60 Hz 

Parameters 

- Speed 



- RI-comp. 

- Ramp up/down (Time) 

- Speed max/min 

Dimensions: 

250 x 160 x 420 mm 

Weight: 

6 kg 

SM 2561 AC Control Module 

The AC Control is a PWM flux vector type frequency control, 

controlled by a microprocessor. All power components are 

based on MOSFET technique. Operation characteristics as 

well as braking method are internally programmable. 


Principle of operation PWM-flux vector 

Output voltage 3 x 0-300 V, 0-100 Hz 

Output power 370 W 

DC-link over voltage Blocking of inverter bridge 

Braking chopper Included 

Input voltage (supply) 220-240 V 1-phase AC, 50-60 Hz 

Parameters 

- Speed 


- Start voltage boost 

- Ramp up/down 

- Speed max/min 

Dimensions: 

250 x 140 x 420 mm 

Weight: 

5 kg 

Presentation of System and Equipment 

Exercise: AC-Machine, SM 2644 

Exercise: The Frequency Converter and the AC-machine 

Exercise: DC-machine, SM 2641 

Exercise: The Rectifier and the DC-machine 

Compact Drive Manual 

Exercise: Mechanically Synchronised Units General Theory 

Theory - The Asynchronous Machine 

Theory - The Frequency Converter 

Theory - The DC-Machine 

Theory - The Rectifier 

29


TERCO Electrical Machine Systems 

Classic Electrical Machine System 

Classic Electrical Machine System 

The Classic System is completely modular. The test motors 

and generators have a power of approximately 1 kW. 

This size of machine is such that: 

1. Standard instruments can be used. 

2. Safety precautions can be observed easily. 

3. It is possible to interchange the machines without 

using a crane or hoist. 

4. Prices are competitive. 

Due to the top quality and robust construction of Terco 

products, they are able to withstand the rough handling by 

new, inexperienced students. 

With Terco Classic Machines it is possible to produce 

characteristics which are typical for machines of ratings 

6-8 kW, as our machines have more iron and copper than 

normal. 

Compare the weight of our test machines with others. 

30


Scan Lab 

System 

Scan Lab is completely 

modular, and the various 

modules can be bought 

separately and integrated as 

the demand arises. This enhances 

the use of Scan Lab 

and makes it flexible and 

economical. 

All the electrical machines as 

well as the power electronics 

have been chosen to take 

uniquely industrial standard 

into consideration. 

Terco Scan Lab is very 

accurate. Very small electrical 

machines give unrealistic 

measuring values. We have 

carefully 

considered this by optimising 

the winding data of the 

machines and by choosing an 

effect of approx 400 W. 

Compact Drive 

A compact teaching system for electrical machines 

and speed regulation. 

With this equipment it is possible to study typical 

industrial cases concerning motor drives: 

- AC machine with and without frequency converter 

- DC machine with 4 Q converter 

In case you would like to extend the use of 

Compact Drive to more advanced experiments, 

Compact Drive can be upgraded with products from 

our Scan Lab Series. 

Please request separate leaflet for any 

of the Machine Systems. 

31


Laboratory Layout 

The layout is most important when designing a functional laboratory. It is of great importance that equipment and furniture 

are taken into account early in the planning stage. A standard solution for planning a laboratory for 16 students can be 

seen below. If the space of the laboratory has been determined already, the standard solution may not be applicable. 

Our engineers will be pleased to advise on any individual requirements. 

See also our brochure ”Power Distribution System and Furniture for Laboratories”. 

➐ 

➎ 

➐ 

TF 1251 

TF 1253 

➏ 

TF 1252 

➊ 

➌ 

➊ 

➌ 

➐ 

➊ 

➌ 

➍ 

➋ 

➌ 

➍ 

➊ Three Torque Meter Benches complete with accessories such as motors, loads, power supplies, switches, flex stands 

with flexes. 

➋ One Eddy Current Brake Bench or other type of brake complete with all accessories. 

➌ Four benches for experiments where the motor bench is not necessary and for theoretical follow-up of the 

experiments. 

➍ Cabinets for instruments, tools and accessories. 

➎ Teacher desk. 

➏ Machine jack. 

➐ Terco Safety Power Distribution System with key-operated central, transformer, student-panels and emergency stops. 

32


Power Distribution System increases Safety in School Laboratories 

Terco´s Power Distribution System consists of a distribution board which is installed near the classroom. Each circuit is 

protected by a MCB, making energising and isolating a simple process for the teacher. There is also a protection device 

which breaks the voltage in the event of accidental disturbance in any phase. An emergency stop is placed in a prominent 

position in the classroom and will break all supplies when operated. 

Voltage system in the lab: 400/230 V 3-ph and 230 V 1-ph 

Incoming voltage 400/230 V 3-ph 

TF 1251 Distribution Panel 

The distribution panel is manufactured in varnished sheet metal and 

used for separate distribution of power to each lab. group (student 

panel). It contains one main switch, eleven 3-pole 16 A MCB (miniature 

circuit breakers), one ELCB (earth leakage circuit breaker), 

one indicator lamp and lockable ON-key. The distribution panel 

breaks the supply voltage when a current > 30 mA fl ows in the protection 

lead. 

TF 1251 is wired for connection of outgoing groups to each MCB. 

The incomming wires to be connected to the main switch. 

Dimensions: 480 x 330 x 60 mm 

Weight: 10 kg 

TF 1253 Transformer 

10 kVA intermittent 

The transformer is air cooled and enclosed in sheet metal 

for placement on the fl oor. 

Main voltage: 3-ph 380-415 V +/-5% 50-60 Hz 

Connection : D/Y-0 

Secondary: 3-ph 380-415 / 220-240 V 50-60 Hz 


Weight: 85 kg 

TF 1229 Contactor with Thermal Protection 

Enclosed in a plastic cover 

Current: 16-24 A 

For transformer TF 1226 and TF 1253 


Weight: 1 kg 

TF 1211 Emergency Stop 

Dimensions excluding the sign: 70 x 70 x 70 mm 

Weight: 0.2 kg 

Emergency sign in English enclosed 

Other Power Distrubution Voltages are available in our programme. 

Please see our brochure ”Power Distribution System and Furniture 

for Laboratories”. 

33


Example of an Electrical Machines Laboratory 

TERCO has delivered equipment to more than 65 different countries 

throughout the world. 

Guarantee & Terms 

All overseas deliveries are dispatched in special, made to order wooden crates, extremely sturdy and damage 

resistant. 

The guarantee is valid for 12 months from delivery and covers repair or exchange of parts, defective due to faulty 

design or workmanship at our factory. Detailed conditions of guarantee are specified in our Terms of Guarantee. 

Spare parts for 2-5 years of normal operation can be offered on request. 

Regular after-sales service is performed by the worldwide network of Terco representatives, along with the advice 

and support of our engineers. 

Commissioning and training is normally offered separately. Special training can be arranged on request either in 

Sweden or on site. 

Terco reserves the right to make changes in the design and modifications or improvements of the products at any time 

without incurring any obligations. 

34

Cross Reference List 

Type 

Code 

Page 

Page 

MV 1006-C 26 

MV 1007-C 26 

MV 1008-C 26 

MV 1009-C 26 

MV 1052 4 

MV 1417 11 

MV 1904 13 

MV 1909 11 

MV 1922 1915-C 16 14 

MV 1923 1922 14 

MV 1924 1923 14 

MV 1926 1924 14 

MV 1927 1926 14 15 

MV 1928 1927 15 

MV 1929 1928 15 

MV 1930 1929 15 

MV 1931 1930 15 

MV 1938 1931 15 

MV 1971 1938 15 17 

MV 1974 1971 17 14 

MV 1976 1974 14 15 

MV 4212 1976 15 17 

Phase MV 4212 Cop 2 17 11 

SM Phase 2501 Cop 2 29 11 

SM 2540 2501 29 

SM 2551 2540 29 

SM 2561 2551 29 

SM 2579 2561 29 

Type 

Page 

SM 

Code 

2593 

Page 

21 

SM 

SM 

2607 

2579 29 

22 

SM 

SM 

2609 

2593 21 

23 

SM 

SM 

2612 

2607 22 

12 

SM 

SM 

2613 

2609 23 

12 

SM 

SM 

2625 

2612 12 

12 

SM 

SM 

2627 

2613 12 

16 

SM 

SM 

2628 

2625 12 

16 

SM 

SM 

2629 

2627 16 

16 

SM 

SM 

2631 

2628 16 

9 

SM 

SM 

2635 

2629 16 

9 

SM 

SM 

2636 

2631 

12 

9 

SM 

SM 

2637 

2635 

10 

9 

SM 

SM 

2638 

2636 12 

12 

SM 

SM 

2639 

2637 10 

12 

SM 

SM 

2640 

2638 12 

7 

SM 

SM 

2641 

2639 12 

6 

SM 

SM 

2643 

2640 7 

6 

SM 

SM 

2644 

2641 6 

7 

SM 

SM 

2645 

2643 6 

7 

SM 2644 

SM 2646 

7 

6 

SM 2645 

SM 2647 

7 

SM 2646 

SM 2648 

6 

7 

SM 2647 

SM 2649 

7 

6 

SM 2648 

SM 2651 

7 

19 

SM 2649 

SM 2652 

6 

19 

SM 2651 

SM 2658 

19 

18 

SM 2652 

SM 2661 

19 

20 

SM 2658 

Type 

18 

Page 

SM 2668 20 

SM 

Code 

2670 

Page 

11 

SM 

SM 

2671 

2661 20 

5 

SM 

SM 

2672 

2668 20 

10 

SM 

SM 

2674 

2670 11 

10 

SM 

SM 

2675 

2671 

21 

5 

SM 

SM 

2676 

2672 10 

10 

SM 

SM 

2678 

2674 10 

18 

SM 

SM 

2679 

2675 21 

13 

SM 

SM 

2680 

2676 10 

21 

SM 

SM 

2681 

2678 18 

21 

SM 

SM 

2683 

2679 13 

8 

SM 

SM 

2684 

2680 21 

8 

SM 

SM 

2685 

2681 21 

8 

SM 

SM 

2686 

2683 8 

SM 

SM 

2688 

2684 8 

SM 

SM 

2690 

2685 

13 

8 

SM 

SM 

2691 

2686 

13 

8 

SM 

SM 

2692 

2688 

13 

8 

SM 

SM 

2693 

2690 13 

13 

SM 

SM 

2694 

2691 13 

13 

SM 2692 

SM 7801 

13 

29 

SM 2693 

TF 1211 

13 

33 

SM 2694 

TF 1229 

13 

33 

SM 7801 

TF 1251 

29 

33 

TF 1211 

TF 1252 

33 

33 

TF 1229 

TF 1253 

33 

33 

TF 1251 33 

TF 1252 33 

TF 1253 33

Terco Headoffice 

Terco headoffice and factory outside Stockholm, Sweden. 

TERCO AB • P.O. Box 5014 • SE-14105 HUDDINGE – STOCKHOLM • SWEDEN 

Telephone: +46 8 506 855 00 • Telefax +46 8 506 855 01 • http://www.terco.se • e-mail export@terco.se 

2005.09/3.000/ Östertälje Tryckeri AB, Södertälje

Scan Lab System Electrical Machines Laboratory - Terco

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?