Schneider Electric LR3D14 Thermal Iec Overload Relay

Product Description

The SCHNEIDER ELECTRIC LR3D14 is a thermal IEC overload relay rated for 7 to 10 amps at up to 690 VAC. It provides motor branch circuit protection by monitoring current draw and tripping when sustained overload conditions are detected. Classified as Trip Class 10A, it responds quickly enough to protect motors in standard industrial and commercial applications. Electricians and controls technicians install this relay as part of a motor starter assembly, typically mounted directly to a contactor. The compact form factor measures 3.5 inches tall, 2.9 inches wide, and 2.1 inches deep, making it well suited for panel and enclosure installations where space is limited.

The LR3D14 is designed for use in motor control applications requiring IEC-style overload protection. It is specified for use with LC1D09 through LC1D38 series contactors, covering a broad range of motor starter configurations in industrial machinery, HVAC equipment, pump controls, and conveyor systems. Its thermal sensing method makes it appropriate for applications with consistent load cycles where bimetal trip technology delivers reliable, repeatable protection.

Key Features

• Trip Class 10A thermal overload protection for fast response to sustained overcurrent
• Current range of 7 to 10 amps covers a wide band of motor sizes within a single relay
• Rated for 690 VAC, compatible with higher-voltage industrial distribution systems
• Thermal sensing method provides reliable, repeatable trip behavior under load
• Direct-mount design compatible with LC1D09 and LC1D38 series contactors
• Compact dimensions allow installation in tight enclosures and control panels

Compatibility

Designed for use with LC1D09 and LC1D38 series IEC contactors as stated by the manufacturer.

Installation Notes

Installation should be performed by a qualified electrician in accordance with NEC guidelines and applicable local codes. De-energize and lockout the circuit before mounting or wiring the relay. The LR3D14 is intended for direct contactor mounting; confirm mechanical alignment with the contactor before securing. Verify the motor full-load amperage and set the overload relay adjustment dial to the appropriate value within the 7 to 10 amp range before restoring power.