Schneider Electric LRD3365 Thermal Overload Relay 80-104A

The Schneider Electric LRD3365 thermal overload relay is a robust protective device engineered to safeguard electric motors from damage caused by overloads or phase failures. Designed for industrial electrical systems, this component provides precise monitoring and reliable disconnection capabilities to ensure the longevity and safe operation of connected machinery. With its adjustable current range and high-quality construction, it serves as a critical link in maintaining stable performance within demanding electrical environments.

Advantages

This thermal overload relay offers exceptional reliability by providing consistent protection against thermal stress and electrical faults. Its adjustable current setting allows for precise calibration to match the specific requirements of the motor, ensuring optimal protection without nuisance tripping. The device is built to withstand the rigors of industrial use, offering a durable solution that integrates seamlessly into existing motor control circuits while maintaining high safety standards for equipment and personnel.

Suitable for

• Industrial motor control systems
• Protection against motor overload
• Phase failure detection
• Electrical panels and automation cabinets

This relay may not be suitable for applications requiring protection against short-circuit currents, as it is designed specifically for thermal overload protection. It should be used in conjunction with appropriate short-circuit protection devices like circuit breakers or fuses to ensure comprehensive system safety.

Key specifications

• Adjustable current range: 80-104 A
• Coil voltage rating: 690 V
• Weight: 510 g
• Colour: Multicolour

How to use

The relay is typically mounted directly onto a compatible contactor or installed on a DIN rail within an electrical enclosure. Once installed, the current range should be adjusted using the integrated dial to match the full-load current rating of the motor being protected. Ensure that all electrical connections are tightened to the manufacturer's specified torque settings to prevent overheating at the terminals. After installation, perform a test to verify that the relay functions correctly under the intended load conditions.

What to consider before purchase

• Verify that the motor's full-load current falls within the 80-104 A range
• Ensure the system voltage is compatible with the 690 V rating
• Check for physical space availability in the electrical cabinet
• Confirm compatibility with the specific contactor model being used

Usage recommendations

Regularly inspect the relay for signs of wear or thermal damage and verify that the settings remain calibrated according to the motor's operational requirements.