A seventy-five kVA transformer designated 4T1B steps down voltage from a 480/277V delta primary to a 208/120V wye secondary with a grounded neutral. The primary side connects to main lug only panel 4P1B rated at 200A. The secondary side connects to main lug only panel 2P1B rated at 225A.
PANEL 4P1B MLO 200A XX,XXX 75KVA XFMR 4T1B DELTA WYE 480/277V 208/120V XX,XXX XX,XXX PANEL 2P1B MLO 225A XX,XXX 125 225
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