BA225H-M/Z3 REX 225KVA 480-120/208V 3PH ISO TRANSFORMER

The BA225H-M/Z3 REX 225KVA ISO Transformer offers reliable power transformation for 480V to 120/208V applications. Designed for three-phase systems, this transformer ensures efficient energy distribution and enhances safety with its isolation capabilities. Ideal for commercial and industrial uses, it guarantees optimal performance and durability in demanding environments.

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SKU REXBA225HMZ3 Categories , ,
Specifications
BrandRex
Voltage480-120/208V
Frame / SeriesBA225H-M/Z3
Catalogue #REXBA225HMZ3
Sizing & Application

The Rex BA225H-M/Z3 is a 225 KVA, three-phase isolation transformer stepping down 480V primary to 120/208V secondary — a standard configuration for powering branch-circuit panelboards in commercial and industrial facilities. At 225 KVA, it is well-suited for medium-to-large electrical rooms, data centres, manufacturing floors, and multi-tenant commercial builds where a dedicated isolated secondary is required for safety or sensitive-load protection. The isolation design suppresses noise and provides a separately derived system, which is commonly required under Canadian Electrical Code (CEC) Section 26 for grounding of separately derived systems. Confirm your load calculations, available floor/wall space, and ventilation clearances with your engineer before specifying — contact our team and we'll help verify this unit meets your project requirements.

The 120/208V, three-phase secondary output is compatible with any standard 208Y/120V three-phase panelboard or distribution board rated for a separately derived system. At 225 KVA, the full-load secondary current is approximately 624A, so your downstream main breaker, lugs, and busbars must be sized accordingly. Send us your panelboard model and we'll help confirm the fit.

The BA225H-M/Z3 is designed for commercial and industrial indoor use. If your application involves outdoor installation, wash-down areas, or elevated ambient temperatures, please confirm the enclosure rating (NEMA type) and insulation class with our team before ordering, as special enclosures or ventilation provisions may be required under CEC rules.

Northern Breaker Group specialises in hard-to-find and obsolete electrical equipment across Canada. If the BA225H-M/Z3 is no longer in active production, we can assist with sourcing new-old-stock, factory reconditioned, or equivalent-rated replacement units. Contact our Calgary, Edmonton, or Vancouver counters or request a quote online and we'll track it down for you.

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