9T51B0109

The transformer has a temperature rise rating of 55°C.

Yes, the transformer is UL-listed.

Yes, the ABB 9T51B0109 Buck-Boost Transformer is manufactured in the USA.

Yes, when field-connected as an autotransformer, it complies with NEC Article 210-9, Exception 1.

Yes, the transformer includes primary fuse holders (2x) and secondary fuse clips (1x) for overcurrent protection.

The transformer supports a voltage adjustment range of 5-27%.

The primary and secondary support dual-voltage configurations, such as 120/240V. Specific combinations depend on field wiring.

Common applications include HVAC systems, lighting circuits, industrial machinery, and control panels requiring stable voltage.

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