Q. 41.A 3-phase, 10 kW, 400 V, 4-pole, 50Hz, star connected induction motor draws 20 A on full load. Its no load and blocked rotor test data are given below
No Load Test: 400 V 6 A 1002 W
Blocked Rotor Test : 90 V 15 A 762 W
Neglecting copper loss in no load test and core loss in blocked rotor test, estimate
motor’s full load efficiency
(A) 76%
(B) 81%
(C) 82.4%
(D) 85%
Answer:(B)
Explanation:
