SSC JE Electrical Engineering 23 Jan 2018 Evening Paper

Question : 123 of 200

Marks: +1, -0

A 3-phase star connected system is supplied by a line voltage of 440 V. The value of phase current is 50 A. What is the power (in kW) consumed by the system, if the current lags the voltage by 45 degrees ?

8.95
24
26.94
47

Validate

Solution:

Power consume P

= √3\V_\L\I_\L\cos\ϕ

Line current and phase current are equal in star connection

=√3\V_\L\I_\P\cos\ϕ

=√3×440×50×\cos45°

= 26.94 kW

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