Academics – Electro-Technology : 2019/MAR/03
Question
Q3) THREE identical coils are star-connected across a three-phase, 440 V, 60 Hz power supply and consume a total power of 3 kW at a power factor of 0.8 lagging.
(a) Determine the resistance and inductance of each coil. (8)
(b) Calculate the current in each line if one coil is:
(i) short- circuited; (5)
(ii) open-circuited. (3)
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