Question

Three star-connected coils are drawing line current of 30A from a three phase supply. Also, total...

Three star-connected coils are drawing line current of 30A from a three phase supply. Also, total apparent and active powers of 25kVA and 11 kW respectively are absorbed by the coils. By assuming that the each coil is characterized by equal impedance, determine:

i. the line and phase voltages

ii. the total reactive power (1 mark) iii. the impedance of each coil.

c) If the coils in Q2(b) are suddenly reconfigured into delta connection,

calculate the new line currents and total active power.

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