GE CR324C660F Overload Relay NEMA 6.400 27 A 3-pole

GE CR324C660F Thermal Overload Relay

The GE CR324C660F is a three-pole thermal overload relay rated for a maximum current setting of 27 A. It is designed to protect motors by interrupting the circuit when excessive current is detected over time. The unit includes thermal units and features a 1NO/1NC auxiliary contact form for status signalling. It is built for separate mounting and carries CSA and UL Listed certifications.

Separate Mounting and NEMA Sizing

This relay uses a separately mounted style rather than direct contactor mounting, requiring panel space and wiring to the starter. It is compatible with NEMA Size 0, 00, and 1 applications and matches Series CR305 magnetic contactors. The fixed thermal protection type means trip characteristics are determined by the installed heater elements. No reset function is integrated, so external reset provisions must be arranged in the control circuit.

Upgrade from Direct-Mounted Overloads

The CR324C660F replaces direct-mounted overload blocks when panel layout demands physical separation from the contactor. The jump is worth it when vibration, heat, or accessibility rules out integral mounting. It does not suit applications needing electronic overload features such as phase-loss sensitivity or adjustable trip classes. Buyers who need automatic or remote reset capability should look elsewhere.