REX – REX 10KVA 208-400/231V 3PH NEMA 2 TRANSFORMER

This indicates the transformer has a primary voltage range of 208V to 400V (three-phase) and delivers a 231V secondary output. This dual primary range allows flexibility when connecting to different supply voltages, such as a 208V North American three-phase service or a 400V European/international supply, while providing a consistent 231V output for your connected equipment.

A NEMA 2 enclosure is rated for indoor use and provides protection against falling dirt and light dripping or splashing water from above. It is appropriate for mechanical rooms, plant floors, and similar indoor industrial locations. It is NOT suitable for outdoor installations, washdown areas, or locations with heavy moisture exposure — a NEMA 3R or NEMA 4 enclosure would be required for those conditions. If you're unsure about your environment's requirements, contact our team for guidance.

For three-phase loads, you can estimate your KVA requirement by multiplying the load current (amps) by the voltage (V) by √3 (1.732), then dividing by 1,000. As a general rule, size the transformer at least 25% above your calculated load to allow for startup surges and future expansion. For motor-heavy applications, additional derating may be necessary. Our specialists can help you verify that this 10 KVA unit is the right size — just send us your load details.