Electrical · E-J5Q76

Mechanical Power Transformer and Panel Board Schematic

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A 45KVA mechanical power transformer steps down 480V to 208Y/120V three-phase four-wire power with an impedance of 3.5%. The transformer feeds a 225A, three-phase, four-wire mechanical power panel board rated at 10KAIC with a 150A three-pole breaker. A grounding conductor consisting of one number six American Wire Gauge wire runs inside a three-quarter-inch conduit to the transformer ground. Circuit connections are marked with reference tags 003C and 003J.

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