Thermal overload relay for MC9b-40a series contactor, current 12-18A MT-32 12-18A

Thermal overload relay for contactor – protection of motors and installations

The MT-32 thermal overload relay, designed to work with MC9b-40a series contactors, is a key element in protecting electric motors from overload. This device monitors the current flowing through the motor and, if the permissible value is exceeded, shuts it down, protecting it from damage. This is particularly important in industrial and workshop applications where failures can lead to downtime and costly repairs.

Construction and application

The MT-32 relay is designed to operate with currents in the range of 12-18A. Its construction, based on the bimetallic principle, allows for precise detection of temperature increases caused by overload. This ensures reliable protection of both the motor and the entire electrical installation. The application of this type of thermal overload relays is wide – from simple home applications to advanced control systems in industry. Fast reaction to overload minimizes the risk of overheating the motor windings and extends its life.

Advantages and benefits

• Motor protection: protects the motor from damage caused by overload, which translates into reduced repair costs and downtime.
• Compatibility: dedicated to MC9b-40a series contactors, ensuring easy installation and trouble-free cooperation.
• Precision of operation: bimetallic construction guarantees accurate detection of temperature increase and fast reaction to overload.
• Extended lifespan: overload protection translates into a longer lifespan of the motor and other elements of the electrical installation.
• Simple installation: intuitive design makes installation and configuration of the thermal overload relay easier.
• Release class 10: ensures fast tripping in case of overload, minimizing the motor's exposure to the harmful effects of high temperature.
• Reliability: high-quality components ensure stable operation of the device in various environmental conditions.

Let us remember that proper selection of the thermal overload relay to the load is crucial to ensure effective motor protection. The motor power, rated current and operating conditions of the electrical installation must be taken into account.