ELECTRICAL MACHINE - I LAB SYLLABUS

List of experiments to be performed(minimum 10 experiments)
1. Determination of efficiency and voltage regulation of a Single Phase Transformer.
2. Parallel Operation of two Single Phase Transformer.
3. Study of three phase transformer connections.
4. Open & short ckt. Test of 3-phase transformer.
5. Back to back test on two single-phase transformers.
6. Measurement of armature and field winding resistance of D. C. Machine.
7. To study the reversal of D. C. Shunt Motor.
8. To perform Load Test on D. C. Shunt Generator.
9. To perform Swinburne’s Test on a D. C. Machine and find out efficiency at full
load.
10. Speed control of a D. C. Shunt Motor by (a) Varying field current with armature
voltage kept constant. (b) Varying armature voltage with field current kept
constant.
11. To find Magnetization or Open Circuit Characteristics of a D. C. Machine.
12. Polarity Test on transformer.
13. To find ratio of series to shunt field turns of DC machine.
14. Electrical breaking of DC motor.
15. 3-phase to 2-phase conversion by Scott connection.

Apparatus Required: -
1. Single phase Transformer
2. Auto Transformer
3. Resistive Load
4. Ammeters, Voltmeters, Wattmeter
5. DPMCB, Tachometer,
6. Starter
7. DC shunt motor, DC generator
8. DC source
9. Field regulator, Rheostat

Reference book:
1. Electrical Machines, Bimbhra, Khanna Pbs.