In a existing hospital, multiple 3-pole, 3-wire transfer switches (no neutral wires pulled to the transfer switches) fed from a paralleling switchgear that has (3) 2000kw generators...there is no bond at the generator or the paralleling switchgear...so this is not a separtely derived system..
These 3-pole, 3-wire transfer switches are feeding multiple MCC for the hospital equipment loads...I have been trying to figure out how the fault current will be cleared in case there is a fault while the genrators are running..there is no effective fault current path with 3-pole, 3-wire transfer switches... Do I miss something here? Thanks.
These 3-pole, 3-wire transfer switches are feeding multiple MCC for the hospital equipment loads...I have been trying to figure out how the fault current will be cleared in case there is a fault while the genrators are running..there is no effective fault current path with 3-pole, 3-wire transfer switches... Do I miss something here? Thanks.