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Transparent GE overload relay, three-pole, NEMA 6.400 27 A

GE

GE CR324C660F Overload Relay NEMA 6.400 27 A 3-pole

SKU CH-8NBA-C8K9N

Thermal overload relay rated 27 A with 3 poles and 1NO/1NC auxiliary contacts for CR305 magnetic contactors

  • TypeNEMA
  • ColorTransparent
  • Thermal overload protection up to 27 A
  • Three-pole design for three-phase circuits
  • Fits NEMA size 0, 00, 1 contactors
  • Compatible with Series CR305 magnetic contactors
  • CSA and UL listed for safety compliance

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.

Highlights

  • Thermal overload protection up to 27 A
  • Three-pole design for three-phase circuits
  • Fits NEMA size 0, 00, 1 contactors
  • Compatible with Series CR305 magnetic contactors
  • CSA and UL listed for safety compliance

Specifications

BrandGE
ModelCR324C660F
TypeNEMA
ColorTransparent

Questions about this item

Should I choose the 6.400 NEMA rating or a different capacity for my CR305 contactor?

The 6.400 NEMA rating matches NEMA Size 0, 00, 1 and works with Series CR305 magnetic contactors; select it when your motor full-load current reaches 27 A.

What does the 27 A maximum current setting mean once the relay is installed?

It is the highest overload trip point the thermal units can be set to; the relay will open its 1NO/1NC auxiliary contacts if motor current exceeds that value.

How does the three-pole NEMA interface limit what I can protect?

Three poles protect all three phases of a motor circuit; the separately mounted relay connects to a CR305 contactor and provides thermal overload protection only.

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