Answer / arvind

yes there is an answer fir that, the answer is

KVAR=KW(inv(tan(PF2)-(inv(tan(PF1)))
where tana is desired power factor and tanb is your current
pf.
now to calaulate your a and b parameter we use this formula
power factor =cosa and power factor=cosb
i.e., inv(cos)=power factor
put this in above equation uyou will get your KVAR RATING
but you should the KW of the load.

Answer / madhu

this is also calculated from power triangle. i.e.,
KVAR=KW/COS(@).

415v 14kw so can u tell me how i can measure the cable size.then size of the earth also

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