bandylb18
Member
E/I inspector on oil truck unloading station. Concern: service 21.6kv to 480v 3ph. 4w to main disconnect; 480v 3ph 4W to transfer switch; 480v 3ph 3w to MCC. Transfer switch will have emergency power supplied by portable emergency generator. Concern: transfer switch has one neutral buss shared by normal and emergency power. If emergency gen. is hooked up to transfer switch in emergency mode will an imbalanced load from the system be felt back at the service transformer through the common neutral in an emergency power situation? Would this be a problem for repair/maintenance person working in the transformer during emergency generating condition?