BC45B-Q/Z REX 45KVA 208-600/347V 3PH TRANSFORMER

The BC45B-Q/Z delivers a 347V, 3-phase secondary output. In Canada, 347V is a standard voltage for commercial and industrial lighting systems — including fluorescent and LED fixtures — as well as certain motor and HVAC loads. It is derived from a 600V, 3-phase wye system and is widely used in Canadian electrical distribution to reduce current and wiring costs for large lighting installations.

Rex transformers, including the BC45B-Q/Z series, can become difficult to source as product lines are updated or discontinued. Northern Breaker Group specializes in obsolete and hard-to-find electrical equipment across our Calgary, Edmonton, and Vancouver locations. Contact us with your unit's nameplate details and we'll confirm stock availability or identify a compatible replacement.

Before installation, confirm that your supply voltage falls within the 208–600V primary range and that your connected load does not exceed 45 KVA (approximately 125A at 208V or 43A at 600V, 3-phase). You should also verify the enclosure rating suits your environment (indoor/outdoor, wet/dry), ensure adequate ventilation for a dry-type unit, and consult a licensed electrician to confirm compliance with the Canadian Electrical Code (CEC). Contact us if you need help matching the transformer to your specific application.