How much KVAr bank reqired for 630 KVA transformer on full load for maintain p

How much KVAr bank reqired for 630 KVA transformer on full
load for maintain power factor upto.99

Question Posted / karan

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How much KVAr bank reqired for 630 KVA transformer on full load for maintain power factor upto.99..

Capacitor calculation is depends on load. if 630 KVA transformer is loaded fully with load p.f.=1 then no compansation is required but if the same is fully loaded with load p.f. = 0.8 then, kvar required is calculated as below:
KVAR = KW ( tanǾ1-tanǾ2); Ǿ1=old p.f.angle, Ǿ2=new pf angle

= 504 ( 0.75 - 0.14) [ here, KW=504 because, 630 X 0.8 = 504]
= 307.44 KVAR
say, 300 KVAR bank is required at load end for compansation

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How much KVAr bank reqired for 630 KVA transformer on full load for maintain power factor upto.99..

Answer / engr junaid afrid

Simply says 630/2=315 kvar for your system.

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How much KVAr bank reqired for 630 KVA transformer on full load for maintain power factor upto.99..

Answer / mahendra singh

KVAR = KVA * sin@
KVAR = KVA * sqrt (1-cos@*cos@)
KVAR = 630* sqrt(1-.99*.99)
KVAR = 88.87

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How much KVAr bank reqired for 630 KVA transformer on full load for maintain power factor upto.99..

Answer / sanjay

generally kvar depends upon 33% of full load. please suggest if i m wrong.

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