Circuit breaker trip unit conversion kits for industrial switchgear.Power circuit breaker trip unit conversion kits to replace series overload trips, trip coils, thermal magnetic overcurrent releases, oil dashpots and older style elctronic trip devices A leading manufacturer of True RMS electronic trip devices and trip unit conversion kits for power circuit breakers. Reduces arc flash potential with the flip of a switch ! Utility Relay Company is a leading manufacturer of microcontroller based, true RMS solid state trip units for AC and DC power circuit breakers. The AC-PRO trip unit is design