The Schneider Electric LRD33 is a thermal magnetic overload relay designed for robust protection of AC circuits and three-phase motors. This relay is engineered to safeguard against common motor faults including overloads, phase failures, extended starting durations, and prolonged stalling conditions. Its application is critical in ensuring the longevity and operational integrity of motor-driven equipment across various industrial settings.

Technical details

• Series: LRD Thermal Overload Relay
• Adjustable Current Range: 17 to 104 AMPS. This wide range allows for precise calibration to match the specific full-load amperage (FLA) of the protected motor, ensuring optimal protection without nuisance tripping.
• Phase Loss Protection: Integrated phase loss detection provides immediate shutdown upon sensing a phase imbalance or loss, preventing motor damage from unbalanced voltage conditions.
• Thermal Reset: Features a manual or automatic reset function, allowing for quick restoration of power after a fault condition has been cleared.
• Mounting: Designed for direct mounting onto compatible Schneider Electric contactors, facilitating a compact and integrated motor control solution.
• Trip Class: Typically configurable to Class 10, 20, or 30, providing flexibility for different motor starting characteristics and load profiles. Buyers should verify the specific trip class configuration for their application.
• Control Circuit Voltage: Compatible with standard control circuit voltages; specific voltage requirements should be confirmed against the manufacturer's datasheet.

Applications & compatibility

The LRD33 is commonly deployed in motor control centers (MCCs) and individual motor starter assemblies for applications such as conveyor systems, pumps, fans, and processing machinery. It is designed to work seamlessly with compatible Schneider Electric contactors, forming a complete motor protection solution for industrial automation and manufacturing environments.

Available from Industrial Automation Co as new, refurbished, or surplus stock, backed by a 2-year warranty with same-day shipping on in-stock items. Request a quote for the Schneider Electric LRD33 or contact our technical team for cross-reference assistance with compatible thermal overload relay components.