Copeland 940-0001-61 Relay Kit

Ensure your compressor startup is precise and secure with the Copeland 940-0001-61 Relay Kit. This potential relay is a critical component for high-torque HVACR applications, specifically designed to handle the rigorous demands of single-phase compressor motor starting. Operating at a 420V coil voltage and 60Hz frequency, this kit features a 3-screw terminal configuration and a rugged panel mount design to simplify field installation and ensure stable electrical connections. A direct OEM replacement part, this relay utilizes calibrated pick-up and drop-out settings—specifically a 320V to 340V pick-up and a 60V to 121V drop-out—to accurately manage the transition between start and run windings. By integrating this HVAC start relay into your system, you effectively prevent motor overheating and protect internal components from voltage-induced stress, maintaining peak operational efficiency across residential and commercial refrigeration units. This high-spec EMERSON potential relay (3ARR3KC6D5) is built for technicians who require reliable switching and long-term compressor reliability.

Key Benefits

• Precision-calibrated 320/240V pick-up voltage ensures accurate capacitor cutout for consistent motor starts.
• Robust 3-screw terminal design provides secure wiring points to eliminate high-resistance connections and voltage drops.
• Optimized for 60Hz compressors with a high 420V coil rating, offering broad compatibility across various refrigeration platforms.
• Durable panel mount housing allows for secure attachment within the control box, minimizing vibration-induced wear.
• Prevents compressor motor overheating by isolating start capacitors immediately after reaching synchronous speeds.

Common Questions

How do I confirm if the 940-0001-61 is the correct relay for my compressor?
This relay is typically matched to specific Copeland compressor models. You should verify the cross-reference on your existing 3ARR3KC6D5 unit or check the compressor nameplate to ensure the pick-up and drop-out voltages match your system’s electrical requirements.

Can I use this potential relay with other brands besides Copeland?
While designed as a genuine Copeland component, this potential relay functions based on universal electromechanical principles. However, it is essential that the coil voltage (420V) and pick-up/drop-out ratings align perfectly with your motor's specifications to prevent winding damage.

What are the signs of a failing potential relay in a refrigeration system?
Common indicators include the compressor "short cycling," humming without starting, or tripping the circuit breaker upon startup. These issues often stem from the relay failing to engage the start capacitor or failing to disconnect it after the motor reaches speed.

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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.