System
A major advantage of alternating and three-phase current compared to direct current is that it is possible to generate electrical energy economically in large power plants, transmit it at high voltage over long distances with low losses and then make it available to the consumer at a level that suits him or her. This is achieved by using transformers.
With this equipment set, a three-winding transformer consisting of three individual poles with different switching options of the primary side and variable secondary voltage is examined. The third winding (tertiary winding) is provided as a so-called triangular balancing winding for the case of an unbalanced load.
Learning objectives
-
Behaviour of a three-phase transformer under short circuit, no-load and load (RLC)
-
Calculation of the equivalent circuit of a transformer from measurements
-
Behaviour under unbalanced load and influence of the balancing winding
- Demonstration of an autotransformer
Through measurements and calculations, the learner should understand and determine the behaviour and characteristics of a transformer.
Target groups
Pupils in vocational training in power engineering. Training in the field of power plant technology in industry. Students in general electrical engineering and power engineering. Levels up to a bachelor's degree.
Knowledge of three-phase or alternating current technology is a prerequisite.
Topics
- Behaviour during no-load operation
- Behaviour during short circuit
- Behaviour during load operation
- Behaviour under unbalanced load
- Determination of the zero impedance
- Demonstration of an autotransformer
| 1 | 745 50 8 | Three-Phase Transformer TL380KV  |
| 1 | 773 361 | Controllable resistive load, 1.0 |
| 1 | 773 363 | Controllable capacitive load, 1.0 |
| 1 | 773 364 | Controllable inductive load |
Alternative:
(not included in the total price) | 1 | 733 11 4 | Capacitive load 1.0 |
Manuals: | 1 | 565 091 4 | LIT-print: Three-Phase Transformer, German |
| 1 | 775 370EN 4 | LIT-print: Three-Phase Transformer |
Measuring instruments, with digital measurement CASSY: | 1 | 727 111 | Power Analyser CASSY Plus |
| 1 | 524 222 | * CASSY Lab 2 for Drives and Power Systems |
Alternativ option to measuring instruments above:
Measuring instruments, with digital measurement CASSY and oscilloscope operation:
| 1 | 575 302 | Oscilloscope 30 MHz, digital, PT1265 |
| 2 | 575 231 8 | Probe 100 MHz, 1:1 / 10:1 |
Power supply: | 1 | 725 442DG | Three-phase voltage 400 V/2.5 A |
| 1 | 726 256 8 | Panel frame VT160, three-level |
| 2 | 500 59 8 | Safety bridging plugs, black, set of 10 |
| 1 | 500 591 4 | Safety bridging plugs, yellow/green, set of 10 |
| 1 | 500 592 8 | Safety bridging plugs with tap, black, set of 10 |
| 1 | 500 851 4 | Safety experiment cables, 32 A, set of 32 |
| 1 | 500 852 8 | Safety connecting leads, 32 A, yellow/green, set of 10 |
| 4 | 500 641 8 | Safety experiment cable, 100 cm, red |
| 4 | 500 642 4 | Safety experiment cable, 100 cm, blue |
| 2 | 500 647 4 | Safety connection lead 100 cm brown |
| 2 | 500 6481 4 | Safety connection lead 100 cm grey |
| 6 | 500 614 4 | Safety experiment cable, 25 cm, black |
| 6 | 500 624 4 | Safety experiment cable, 50 cm, black |
Additionally recommended:
PC with Windows 7/8/10
Articles marked with * are not essential, we do however recommend them to carry out the experiment.
