Thermal overload relay for MC75a-100a series contactor MT current 63-85A MT-95 63-85A

Thermal overload relay for MC series contactors

The MT-95 63-85A thermal overload relay is a reliable device designed to protect electric motors from overload and other abnormalities in the circuit. It provides comprehensive protection by reacting to overloads, phase failure, long start-up times, and rotor problems. It is compatible with MC-75a, MC-85 and MC-100a series contactors, making it a universal solution in many electrical installations.

Construction and application

The MT-95 relay is a bimetallic overload relay designed to operate in alternating current circuits. The possibility of mounting directly on the contactor or separately with a dedicated UZ-63L base provides installation flexibility. It has screw terminals for the main circuit and built-in auxiliary contacts – one normally open (NO) and one normally closed (NC) – which facilitates integration with the control system. The device is particularly useful in industrial applications where motor protection is critical to continuity of operation and safety.

Key features and benefits

• Wide adjustment range: Current adjustment in the range of 63-85A allows for precise matching to the characteristics of the protected motor.
• Versatility: Compatibility with popular MC series contactors simplifies selection and integration into existing installations.
• Protection against various failures: Protects against overload, phase failure and long start-ups, minimizing the risk of motor damage.
• Built-in auxiliary contacts: Allow easy connection to control and alarm signaling systems.
• Ambient temperature compensation: Ensures stable operation in various temperature conditions (-5°C to 60°C).
• Durable construction: Made of high-quality materials guarantees the reliability and long life of the device.
• Phase asymmetry protection: Additional protection against the effects of uneven phase loading.

The MT-95 relay is a solid solution for professionals who value reliability and precision in electric motor protection. Its versatility and ease of installation make it ideal for both new installations and modernization of existing systems.