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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?

Answers were Sorted based on User's Feedback



why we are using large cross section cable at load side and small at other (11kv to trsfr)side of t..

Answer / nithi

For the same power transaction in a transformer((we know,
in trasformer the power is tranferred from one winding to
another winding through magnetic medium)) if the voltage
level is decreased,the current level increases which in
turn increase the cable size to supply the load with
minimum voltage drop& power losses.
THE CURRENT RATING OF THE LV WINDING IS HIGHER THAN
THE HV WINDING.
when the load increases, the current on both the
winding increses.But the amount of increasing current is
large in LV side compared to hv side.

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why we are using large cross section cable at load side and small at other (11kv to trsfr)side of t..

Answer / 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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