1.

Calculate the compensator rating required for sin(Φ)=.8.(a) 0.9 P.U(b) 0.8 P.U(c) 0.7 P.U(d) 0.2 P.UI had been asked this question in final exam.Asked question is from Motors Rating and Heating topic in section Rating and Heating of Motors of Electric Drives

Answer»

Correct choice is (b) 0.8 P.U

To explain I would say: The compensator RATING can be CALCULATED using the relation QP.U=√1-cos^2(∅)=sin(∅)=.8. This per unit value VAR compensator is required to IMPROVE the power factor of the system.



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