I have 30KW Motor Starter Panel, System voltage is 480V, So i have to convert vo

I have 30KW Motor Starter Panel, System voltage is 480V, So i have to convert voltage 480 to 220V to give the contactor coil. How i can select control transformer, Which rating transformer i can use this panel, what is the procedure, please tell me.

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I have 30KW Motor Starter Panel, System voltage is 480V, So i have to convert voltage 480 to 220V to..

Answer / santhosh(adityabirla group)

u know ur motor kw and supply voltage, first u have to
calculate ur full load amps,

KVA 480V
30 36A
45 54A
75 90A

now u have to select ur rated KVA trafo

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I have 30KW Motor Starter Panel, System voltage is 480V, So i have to convert voltage 480 to 220V to..

Answer / santhosh(adityabirla group)

transformer selection calculation

A=KVA*1000/V*1.732
ex: ur amps:36
volts :480
calculate ur KVA

Ans:29.92
selact :30KVA

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