Thermal overload relay for MC130a-150a series contactor, current 110-150A MT-150 110-150A

Thermal overload relay for contactor – protection of motors and circuits

The MT-150 thermal overload relay, designed to work with MC-130a and MC-150a series contactors, is a reliable safety element protecting electrical circuits and motors from the effects of overloads. This device, based on bimetallic technology, protects against damage resulting from long-term overloads, phase failures and motor starting problems. The MT-150 relay is compatible with LS contactors, providing precise and effective protection in various industrial and commercial applications.

Construction and application

The MT-150 thermal overload relay is a three-phase device designed for direct mounting on the contactor or separately using a dedicated UZ-63L mounting base. Its main task is to monitor the current flowing through the circuit and automatically switch off in the event of exceeding the permissible value. This ensures that motors and other devices connected to the protected circuit are protected against overheating and potential damage. The device finds wide application in motor control systems, pumps, fans and other devices requiring protection against overloads.

Key features and benefits

• Wide adjustment range: The MT-150 relay offers a current adjustment range from 110A to 150A, allowing it to be adapted to different loads and applications.
• Compatibility with LS contactors: Designed to work with MC-130a and MC-150a series contactors, which guarantees optimal operation of the protection system.
• Durable construction: Made of high-quality materials, ensures reliable operation in harsh industrial conditions.
• Bimetallic technology: The use of bimetal ensures a precise reaction to current changes and a quick switch-off of the circuit in the event of an overload.
• Easy installation: The possibility of direct mounting on the contactor or on a dedicated UZ-63L base facilitates installation and servicing.
• Protection against phase failures: The relay also reacts to the absence of one of the phases, which further increases the safety of the installation.
• Compliance with standards: The device meets the requirements of IEC 60529 standards, which confirms its safety and reliability.

The MT-150 relay is intended for use with MC-130a and MC-150a contactors and offers a current adjustment range from 110A to 150A.

It is important to select the thermal overload relay correctly to the characteristics of the load and the parameters of the contactor, in order to ensure optimal protection of the electrical installation. A properly selected relay not only protects devices from damage, but also extends their lifespan and minimizes the risk of downtime.