Cutler-Hammer C320MSR1D Undervoltage Release Module

The Cutler-Hammer C320MSR1D Undervoltage Release Module is a high-voltage control accessory designed for 550–600V systems. It provides undervoltage protection by holding a contactor coil energized and releasing it when the sensed voltage falls outside the specified range, helping to prevent unsafe motor startups and other electrical faults in control panels. The module is identified by model C320MSR1D within the Cutler-Hammer lineup and is intended for integration with compatible switchgear and motor control equipment that requires undervoltage protection in its control circuit. Verified operating range is 550–600V, aligning with industrial installations that use elevated voltage levels. Use this module as part of a protection scheme in enclosures or electrical panels where ensuring control circuit reliability during voltage fluctuations is important, and ensure proper installation with the appropriate Cutler-Hammer components and adherence to applicable electrical codes and safety practices.