Westinghouse 2606D58G05 Undervoltage Release Unit

The Westinghouse 2606D58G05 Undervoltage Release Unit provides automatic breaker tripping on voltage loss for Westinghouse molded case circuit breakers, delivering fast protective action in heavy‑duty power distribution systems. This internal breaker accessory (Series U, part number 2606D58G05) is used in switchgear and industrial control panels to provide undervoltage protection in manufacturing, mining, and industrial power distribution environments. It is designed for replacement and retrofit projects within legacy Westinghouse protection systems and is compatible with MCCs and breaker assemblies used in industrial AC power systems. Common replacements include the Westinghouse 2606D58G19 Shunt Trip Unit, Eaton Series C Undervoltage Release, and Cutler-Hammer Breaker Undervoltage Module.