Engineering Board Exam Reviewer · Three-Phase Systems in Power Applications · medium
The 30 kW, 0.8 power factor lagging three-phase load above is supplied from a 480 V line. Find its total reactive power.
- 22.5 kvar
- 18 kvar
- 37.5 kvar
- 45 kvar
Answer
A. 22.5 kvar
Solution
S= P PF=30/0.8=37.5 kVA. Q=S =37.5(0.6)=22.5 kvar.
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