AC transformer, 0.3

AC transformer, 0.3
AC transformer, 0.3

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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 a power analyser as a measuring device

This individual equipment set is used to investigate AC transformers. The AC transformer (single-phase transformer) is a standard module which can be used for many applications across the whole of electrical engineering. This transformer is suitable for the investigations of the equivalent circuit diagram with short-circuit, open-circuit and load test.


With the single-phase transformer, especially the equivalent circuit can be calculated with the Power Analyser.The hysteresis of the transformer iron is examined in an experiment and compared with the iron losses from the no-load test.

All functions of the Power Analyser CASSY can be operated quickly and directly via the display, the rotary wheel and the buttons on the unit. All settings and measurement results can be saved on the unit and quickly called up again later or simply downloaded.

In addition, the Power Analyser CASSY is fully controllable in real time via RJ45 Ethernet, W-LAN and USB-C interfaces.

These interfaces can be used by the following software:

  • CASSY Lab 2 for drives and energy systems,
  • MATLAB® and LabVIEW ™
  • Lab Docs Editor Advanced

The following integrated servers are available in the Power Analyser CASSY for the local media connection of at least four end devices simultaneously.

For more details, see product data 727110 or 727111 Power Analyser CASSY.

The individual equipment is equally suitable for student experiments in the laboratory with low voltage (230 / 400 V three-phase current) and - with a mobile trainer - for teacher demonstration in the classroom. The experiments are carried out according to the manual.

The target group is made up of commercial apprentices and students of electrical machine construction. The course offers experiments at an intermediate level and also allows for the necessary insight into machine behaviour for scientific interpretation at undergraduate level. The media connection makes the experiments suitable for demonstration in the classroom or a lecture hall.

In the following configurations there are further extended experiments with transformers:

  • E2.2.1.1 Three-phase transformer
  • E2.2.1.2 Scott transformer
  • E2.2.1.4 AC toroidal core transformer
  • E2.2.1.5 AC auto-transformer


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

Main components:

Components of equipment sets

1 73397  8  1-phase transformer, 0.3 LD
1 773360 Controllable resistive load, 0.3 LD
1 773362 Controllable capacitive load, 0.3 LD
1 773364 Controllable inductive load LD
1 775220DE  4  LIT-print: Transformers 1.0, German LD
1 775220EN  4  * LIT-print: Transformers 1.0 LD
1 727111 Power Analyser CASSY Plus LD
1 524222 * CASSY Lab 2 for Drives and Power Systems LD
Power supply:
1 72685  8  Adjustable transformer 0...260 V LD
1 72609  4  Panel frame T130, two-level LD
2 50059  8  Safety bridging plugs, black, set of 10 LD
1 500591  4  Safety bridging plugs, yellow/green, set of 10 LD
1 500855  4  Safety experiment cables, 32 A, set of 34 LD
1 500856  4  Safety experiment cables, 32 A, yellow/green, set of 5 LD
Additionally recommended:
PC with Windows 7/8/10

Articles marked with * are not essential, we do however recommend them to carry out the experiment.

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