Electrical · E-VV7Z3

Generator Ancillary Power Distribution Single Line Diagram

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An electrical distribution schematic shows a 75kVA transformer rated for 480V to 208/120V supplying downstream power panels. Power originates through a 400A main circuit breaker panel operating at 480V, 3-phase, 4-wire with 42 circuits, protected by a surge protective device and monitored by a meter. The step-down transformer feeds two 208V secondary panels, including a 225A main circuit breaker panel and a 225A main lug only panel, each configured for 3-phase, 4-wire service with 42 circuits. Circuit designations and conduit tags such as C150.3, C225.4, C400.4, and C2500.3 route the electrical connections across the system.

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