Ampteks Products


AC-Pro Retrofit Kits

Utility Relay Company is a leading manufacturer of the micro controller based AC-Pro, true RMS solid state trip units for  power circuit breakers. Utility Relay Company’s focus is providing high quality, reliable and versatile trip units for low voltage circuit breakers.


AC-Pro trip unit retrofit conversion kits replace legacy electromechanical series overload trip devices, thermal magnetic overcurrent releases, and older style electronic trip devices to provide greater accuracy, reliability, functionality and provides life extension of older circuit breakers at a fraction of the cost of a new circuit breaker and without modifying the switchgear.


We have been installing AC-Pro retrofit kits since the beginning, that is more than 25 years. There are more than 7000 kits available and more in development so please contact us for further information

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