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why we are using large cross section cable at load side and small at other (11kv to trsfr)side of transformer?
when the load increses current at both side increases,right?
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Answer Posted / dileep
conductor size will be depends upon of the current carrying capacity. wen i m talking about transformers,transformer voltage, current changing device but constant power(KVA) device.so if it is a step down transformer ,current will flow through the secondary is greater than primary to ensure thAt maintain const power on both sides thats why LV conductors are more size compared to HV.if it is a step up transformer vice_versa
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