FEEDBACK Thyristor and DC Motor Control Transformers

SKU: E2.2.7.4 Categories: , Tag:


Trainer for operations of Power Electronics Circuits and Motor Drives using a DC Shunt Motor

  • Uncontrolled and Control Rectification
  • Half Controlled Rectification – 1ph & 3ph
  • AC Control – 1ph & 3ph
  • Single Half and Full Wave Motor Control
  • Closed Loop System
  • Four Quadrant Control
  • Power Inversion

E2.2.7.4  Transformers

Replacement for FEEDBACK 60-070-TFM-230  Single & Three Phase Transformers

The experiments are carried out using transformers on training panels in panel frames.


  • Protective measures and electrical safety
  • Set-up of power generation systems according to circuit diagrams
  • Use of commercial measuring instruments, hand-held multimeters, oscilloscopes, measuring interfaces

Transformers are magnetically coupled systems used for transforming AC voltages or matching impedance. Transformers can therefore be used primarily for measurement or generation of electric power. These practical exercises study exclusively transformers used in energy generation. Transformer power ratings can range from a few mVA up to several MVA. The size and design also have an important effect on the transformer ratings. Transformers are regarded as electrical machines even though they contain no moving parts. The windings of three-phase transformers can be connected in a variety of circuit configurations.

Students carry out the experiments as specified in the printed manual. Hand-held multimeters are used to measure the characteristics of the transformers. Display of current or voltage against time is particularly interesting for three-phase equipment, although it is not essential. If this aspect is not required, then it is possible to dispense with the oscilloscope, isolating amplifier etc. or Sensor-CASSY. In this case multimeters are sufficient for measuring RMS values.

The target group is made up of commercial apprentices and students of power engineering. The course offers experiments at an intermediate level for vocational colleges and undergraduate level.

The complete equipment set allows for experiments on all the most important types of transformer in the 300 W rating class.


  • Voltage equation and equivalent circuit
  • Measurement without load, with load and with a short circuit
  • Determination of self-inductance, magnetic coupling and leakage
  • Losses, changes in voltage and efficiency

Main components:

1 733 90 Three-phase transformer 0.3LD
1 733 91 Three-phase transformer 1.0LD
1 733 97 Single-phase transformer 0.3LD
1 733 93 Scott transformerLD
1 733 98 AC toroidal core transformer 0.3LD
1 733 99 AC autotransformer 0.3LD
1 67-142-230 Switched three-phase Resistive LoadFB
1 67-142-120 Switched 3 Phase 120VFB


1 727 100 Power Analyser CASSYLD
1 727 100NA Power Analyser CASSY  120V/60HZLD
1 524 220 CASSY Lab 2LD

Conventional measuring instruments:

Alternative option to CASSY measuring instruments above

Replacement for FEEDBACK 60-070-CI1 Conventional Instruments I

1 68-100 Electronic Single & 3 Phase MeasurementsFB
2 727 10 RMS meterLD

Alternative option to 72710

2 531 282 Multimeter Metrahit ProLD

Replacement for FEEDBACK 60-070-CI2 Conventional Instruments II

1 531 15 Wattmeter C.A 405, single/three- phaseLD


Power supply:
1 725 442DG Three-phase voltage supply 400 V/2.5 ALD
1 60-105-230 Universal Power Supply – 230VFB
1 60-105-120 Universal Power Supply – 120VFB
1 726 287 Panel Frame FB T150, three levelLD
2 500 59 Safety bridging plugs, black, set of 10LD
1 500 591 Safety bridging plugs, yellow/green, set of 10LD
1 500 855 Safety connecting leads, 32 A, Set 34LD
1 500 856 Safety connecting leads, 32 A, yellow/green, set of 5LD

Additionally recommended: PC with Windows 7/8/10
Articles marked with * are not essential, we do however recommend them to carry out the experiment.