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sir,
why alternator output is connected to delta side in to
generating transformer? any reasion?
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Answer Posted / laxmikanta sasmal
COZ ALTERNATOR ARE GENERALLY STAR CONNECTED WHEREAS THREE LEADS ARE SHORTED AND OTHER THREE LEADS ARE OUT,THEN CONNECTED TO DELTA/DELTA OR DELTA/STAR CONNECTED TRANSFORMER'S DELTA END.DELTA CONNECTION WINDING IS MANDATORY AT ALTERNATOR OUTPUT SIDE.BECOZ IN SAME VOLTAGE LEVEL TWO STAR POINT IS NOT ALLOWED.IT WILL CAUSE OF HUGE AMOUNT CIRCULATING CURRENT FLOWING IN UNINTENDED PATH AT THE TIME OF FAULT/UNBALANCE AND MALFUNCTIONING OF PROTECTION RELAYS
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