thermal overload relay

A Thermal Overload Relay (TOR) is an essential protective device used to safeguard electric motors and circuits from damage caused by prolonged overcurrent or overheating. It operates on the principle of bimetallic thermal expansion, automatically disconnecting the motor when the current exceeds the preset limit for a specific duration.

Designed for use with AC contactors, thermal overload relays provide accurate, automatic protection against overloads while allowing short-duration startup currents to pass without tripping. These relays are adjustable, resettable, and highly reliable, making them ideal for industrial, commercial, and automation applications.

Thermal overload relays are widely used in motor starters, control panels, and power distribution systems to ensure safe, continuous, and efficient operation of electrical equipment.

Key Features:

• Bimetallic thermal sensing mechanism for precise overload detection

• Manual and automatic reset options

• Adjustable current setting range for flexible protection

• Trip indicator for easy fault identification

• Compact, DIN-rail or direct contactor mounting

• High repeat accuracy and reliability

• Conforms to IEC/EN 60947-4-1 standards

• Compatible with various contactor models (e.g., Chint NC1, NC2, NXC series)