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How can calculate ups battery back up time?
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su-kam inverter company saying in a restive load backup time will be battery ah*battery v*80%/total load.(20% is battery
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I have 4 DG set with 1500KVA rating. system breakers are 11KV & alternator are 415 Volts. Between alternator & breaker one stepup transformer used. i want to Know what is max. resistance for body earthing & 415 & 11KV V Neuteal earthing. my fault current is 14 times for 2 sec.
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