BA300H-M/Z3 REX 300KVA 480-120/208V 3PH ISO TRANSFORMER

The BA300H-M/Z3 delivers a 120/208V three-phase, four-wire Wye output from a 480V primary. This secondary configuration supports both single-phase 120V branch circuits and three-phase 208V loads simultaneously, making it a common choice for industrial distribution panels and commercial mechanical rooms.

The 'ISO' designation indicates this is an isolation transformer — the primary and secondary windings are electrically separate with no direct conductive path between them. This provides important benefits including attenuation of electrical noise and transients, improved safety by establishing a separately derived system, and a new neutral-to-ground bond point on the secondary side as required by the Canadian Electrical Code (CEC) for separately derived systems.

Rex transformers, including the BA300H series, can be difficult to source through standard distribution channels. Northern Breaker Group specializes in hard-to-find and obsolete electrical equipment across Canada. Whether you need a direct replacement BA300H-M/Z3 or a compatible equivalent at 300 KVA / 480-120/208V 3-phase, contact our Calgary, Edmonton, or Vancouver counters for a quote and availability check.