IN 500 KVA TRANSFORMER 11KV/415 VOLTS HOW TO CALCULATE THE HT CABLE SIZE AND L

IN 500 KVA TRANSFORMER 11KV/415 VOLTS HOW TO CALCULATE THE HT
CABLE SIZE AND LT CABLE SIZE FROM TRANSFORMER TO LT PANNEL.
AND HOW MANY MAINSWITCHES OR MCBS WITH RATING ARE TO BE
PROVIDED

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IN 500 KVA TRANSFORMER 11KV/415 VOLTS HOW TO CALCULATE THE HT CABLE SIZE AND LT CABLE SIZE FROM TR..

Answer / sudhakar g

First you have to caluclate the load of the T/F i.e
KW=KVA*p.f
KW=500*0.8=400KW
I=kw*1000/1.732*415v*0.8
I=696.74 A
Based on these we can choose the Cable size ....
suppose the LT AL cable of 3.5c x 400 sqmm will give 530 A
of polycab....if we go for two runs of 400sq.mm means it is
good and the breaker size we will go for 800A ACB bresker
means it is good....

I am taking Electrical desining classes in Bangalore...It
will be usefull for designing as well as site engineers
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Cable sizing, Lighting cal, panels, breaker
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IN 500 KVA TRANSFORMER 11KV/415 VOLTS HOW TO CALCULATE THE HT CABLE SIZE AND LT CABLE SIZE FROM TR..

Answer / brijesh kumar

kindly give full answer

Is This Answer Correct ?

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6 No

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