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The ABB 9T51B0104 buck-boost transformers are small, single phase, dry type distribution transformers designed and shipped as insulating/isolating transformers. They have a dual voltage primary and a dual voltage secondary. These transformers can be connected for a wide range of voltage combinations. They comply with NEC Article 210-9, Exception 1, when field connected as an autotransformer.
These transformers feature an encapsulated core and coil in a NEMA 3R non-ventilated weatherproof enclosure. Suitable for appliance, lighting, and power loads from electrical distribution systems.
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