Description
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.
Objectives
- 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.
Topics
- 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 0.3 |
| 1 | 733 91 | Three-phase transformer 1.0 |
| 1 | 733 97 | Single-phase transformer 0.3 |
| 1 | 733 93 | Scott transformer |
| 1 | 733 98 | AC toroidal core transformer 0.3 |
| 1 | 733 99 | AC autotransformer 0.3 |
| 1 | 67-142-230 | Switched three-phase Resistive Load |
| 1 | 67-142-120 | Switched 3 Phase 120V |
Manuals:
| 1 | 727 100 | Power Analyser CASSY |
| 1 | 727 100NA | Power Analyser CASSY 120V/60HZ |
| 1 | 524 220 | CASSY Lab 2 |
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 Measurements |
| 2 | 727 10 | RMS meter |
Alternative option to 72710
| 2 | 531 282 | Multimeter Metrahit Pro |
Replacement for FEEDBACK 60-070-CI2 Conventional Instruments II
| 1 | 531 15 | Wattmeter C.A 405, single/three- phase |
| 1 | 725 442DG | Three-phase voltage supply 400 V/2.5 A |
| 1 | 60-105-230 | Universal Power Supply – 230V |
| 1 | 60-105-120 | Universal Power Supply – 120V |
| 1 | 726 287 | Panel Frame FB T150, three level |
| 2 | 500 59 | Safety bridging plugs, black, set of 10 |
| 1 | 500 591 | Safety bridging plugs, yellow/green, set of 10 |
| 1 | 500 855 | Safety connecting leads, 32 A, Set 34 |
| 1 | 500 856 | Safety connecting leads, 32 A, yellow/green, set of 5 |
Additionally recommended: PC with Windows 7/8/10
Articles marked with * are not essential, we do however recommend them to carry out the experiment.