RA225J-H REX 225KVA 600-480V AUTO TRANSFORMER

An autotransformer like the Rex RA225J-H shares a common winding between primary and secondary, making it more compact and efficient than a two-winding isolation transformer at the same KVA rating. However, it does not provide galvanic isolation between the 600V and 480V circuits. If electrical isolation is required for safety or code compliance in your application, a separate isolation transformer would be needed instead.

Yes — autotransformers are generally bidirectional. The Rex RA225J-H can be used to step down from 600V to 480V or step up from 480V to 600V, provided the load and wiring are configured correctly for the intended direction. Always verify the connection diagram on the unit's nameplate and consult a licensed electrician to ensure proper installation per Canadian Electrical Code requirements.

Northern Breaker Group specializes in sourcing obsolete and hard-to-find electrical equipment across Canada. If the Rex RA225J-H is no longer in regular production, our teams in Calgary, Edmonton, and Vancouver can work to locate new-old-stock or suitable equivalent units. Contact us with your application details and we'll do our best to get you what you need.