Copeland 971-0329-11 Protector Relay

The Copeland 971-0329-11 Protector Relay is a critical compressor motor protection component designed for demanding refrigeration and air conditioning applications. Engineered as a high-reliability internal motor protector, this relay monitors winding temperatures to prevent catastrophic failure from over-current or thermal overload conditions. As an OEM Copeland replacement part, it ensures seamless integration with compatible Copeland hermetic compressors and Copelametic models. This protective motor relay utilizes a precise line-break mechanism to interrupt the contactor circuit, safeguarding the assembly from locked rotor conditions or phase loss. For service technicians and contractors, maintaining the integrity of the thermal protection system is non-negotiable for system longevity. The 971-0329-11 provides the exact response curves required to meet manufacturer specifications, ensuring the unit operates within safe electrical parameters without premature nuisance tripping.

• Direct OEM Compatibility: Ensures the line-break protection matches original factory specifications for 115V/230V applications.
• Thermal Overload Prevention: Critical for preventing compressor motor burnout during high-load or restricted airflow scenarios.
• Optimized Response Time: Engineered to detect winding heat spikes accurately, preventing damage before it reaches the stator.
• Durable Construction: Built to withstand the high-vibration environment typical of HVACR compressor housings.

• How do I test a Copeland 971-0329-11 protector relay? Use a multimeter to check for continuity across the terminals; an open circuit during cool-down indicates a failed protector that requires replacement.
• Can this relay be used on non-Copeland compressors? This part is specifically calibrated for Copeland motor protection curves; using it on other brands may compromise safety and performance.
• What causes this protector to trip frequently? Common issues include low refrigerant charge, failing start capacitors, or fouled condenser coils causing excessive motor heat.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.