BA112H-M/Z3 REX 112KVA 480-120/208V 3PH ISO TRANSFORMER

At 112 KVA with a 120/208V, 3-phase secondary, the full-load secondary current is approximately 311A (112,000 ÷ (208 × √3)). You would typically size the secondary overcurrent protection at or just above this value — commonly a 350A breaker or fused disconnect — subject to your engineer's load study and compliance with the Canadian Electrical Code (CEC). Contact our team for help sourcing a matching disconnect or breaker.

Rex BA112H-M/Z3 isolation transformers in this series are dry-type units, making them suitable for indoor industrial installation without the maintenance requirements of liquid-filled designs. Always verify the enclosure rating (e.g., NEMA 1 or NEMA 3R) on the nameplate to confirm whether the specific unit is rated for the environment — ventilated or non-ventilated — you intend to install it in. Reach out to our team if you need clarification on the nameplate data for your unit.

Rex transformers can be difficult to source as the product line has aged. Northern Breaker Group specialises in obsolete and hard-to-find electrical equipment and can assist with sourcing original Rex units or identifying a cross-reference equivalent from an active manufacturer (such as Hammond, Square D, or Eaton) that matches the 112 KVA, 480–120/208V, 3-phase specification. Send us your nameplate details and we'll find your best option.