The diagram details an electrical feeder circuit originating from bus E7 with an associated 1200 ampere frame and 300 ampere trip circuit breaker rated 52. Current transformers with a 200:5 ratio and three secondary connections feed into an SEL751 feeder protection relay. The relay incorporates instantaneous phase and ground overcurrent functions designated as 50P and 50G, alongside time-overcurrent functions designated as 51P and 51G. A control trip signal links the relay output directly to the circuit breaker device.
AP AP E7 3 1200AF 300AT 52 200:5 50P 50G 51P 51G SEL751 AP AP E7 3 1200AF 300AT 52 200:5 50P 50G 51P 51G SEL751
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