SSC JE Electrical Engineering 22 Jan 2018 Evening Paper

Question : 140 of 200

Marks: +1, -0

What is the apparent power of a 3-phase star connected system having phase voltage of 254.05 V and line current of 10 A and the phase difference between the voltage and current is 45 degrees?

5.4 kW
5.4 kVA
7.62 kW
7.62 kVA

Validate

Solution:

Given data,

I_L

= 10 A
Vph = 254.05 V
and ϕ = 45°
Now apparent power

= 3 × V_\ph × I_\L

= 3 × 254.05 × 10
∴ S = 7.62 KVA

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