Main Switchboard Feeding a 225 kVA Transformer and 208 V Distribution Panel

A one-line from a 480Y/277 V, 1,000 A main switchboard through a 350 A primary breaker, a 225 kVA delta-wye transformer (270.6 A primary, 624.5 A secondary) and an 800 A secondary breaker to a 208Y/120 V distribution panel and lighting panels.