Thermal overload relay for MC9b-40a series contactor, current 0.4-0.63A MT-32 4-6A

Motor and Circuit Protection – Reliable Thermal Overload Relay MT-32

The MT-32 thermal overload relay is a key element in protecting electric motors and circuits from overload. Designed to work with MC9b-40a series contactors (Metasol), it provides effective protection and long-term reliability. This device finds wide application in industrial installations, construction, and automation systems.

Construction and Application

The MT-32 relay is characterized by its simple construction and ease of mounting – it can be mounted directly under the contactor or using a dedicated UZ-32S base. Its main task is to monitor the current flowing through the circuit and disconnect the power supply if the set threshold is exceeded, thus protecting the motor from damage. This minimizes downtime and costs associated with repairs. The MT-32 model with a setting range of 4-6A is particularly useful in applications requiring protection for motors with power adapted to this current range.

Functionality and Benefits

• Wide adjustment range: The ability to precisely set the tripping threshold allows you to adapt the relay to specific application needs.
• Integrated auxiliary contacts: Equipped with NO+NC contacts, it facilitates integration with control systems and alarm signaling.
• Manual and automatic reset: Allows flexible adaptation to installation requirements – manual reset after removing the cause of the overload or automatic reset after the motor cools down.
• Tripping indicator: Quick identification of the relay status – visual information about tripping facilitates fault diagnosis.
• Durable construction: Ensures reliable operation even in harsh industrial conditions, resistance to vibration and temperature changes (-5…60°C).
• Compatibility: Adapted to work with LS Metasol series contactors: MC-9b, MC-12b, MC-18b, MC-22b, MC-32a and MC-40a.
• Easy mounting: Direct mounting or on a dedicated UZ-32S base ensures convenient installation.

Thanks to these features, the MT-32 thermal overload relay is a reliable solution for professionals involved in electrical installations and for users looking for effective protection of their equipment.