4EE09 ELECTERICAL MACHINES LAB-II

1  Separation of transformer core losses and to determine the hystersis and eddy current losses at

rated voltage and frequency.

2  To plot the O.C.C. & S.C.C. of an alternator and to determine its regulation by synchronous

impedance method.

3  To synchronize an alternator across the infinite bus (RSEB) & summarize the effects of variation

of excitation on load sharing.

4  To plot the V-curve for a synchronous motor for different values of loads.

5  To perform sumpner’s back-to-back test on 3 phase transformers, find its efficiency &

parameters for its equivalent circuits.

6  To perform the heat run test on a delta/delta connected 3-phase transformer and determine the

parameters for its equivalent circuit.

7  To perform no load and blocked rotor test on a 3 phase induction motor and to determine the

parameters of its equivalent circuits. Draw the circle diagram and compute the following (i)

Max. Torque (ii) Current (iii) slip (iv) p.f. (v) Efficiency.

8  To perform the load test on a 3-phase induction motor and determine its performance

characteristics (a) Speed vs load curve (b) p.f. vs load curve (c) Efficiency vs load curve  (d)

Speed vs torque curve

9  Determination of losses and efficiency of an alternator.

10  To find Xd and Xq of a salient pole synchronous machine by slip test.