Thermal overload relay for MC500a-800a series contactor, current 400-600A MT-800 400-600A

Thermal overload relay for MT series contactors

The MT-800 400-600A thermal overload relay is a protective device designed to work with MC-500a - 800a contactors. Its main task is to protect electric motors and circuits against overloads, phase failures, and the effects of long-term starts or rotor lock-up. Thanks to its bimetallic construction, this device provides reliable operation in demanding industrial conditions.

Characteristics and application

The MT-800 relay finds application in various applications, from simple devices to advanced control systems. It is ideal for protecting motors used in:

• Material processing, packaging and weaving machines
• Crane systems and material transport systems
• Fans and small conveyors
• Packaging machines

The possibility of direct mounting on the contactor or using a dedicated UZ-63L base provides installation flexibility and adaptation to specific needs. This relay is particularly valued for its precision and reliability, which translates to minimizing the risk of failures and downtime in production.

Advantages and structural features

• Wide adjustment range: The MT-800 relay allows setting the tripping current in the range of 400-600A, enabling adaptation to different loads.
• High resistance to interference: Thanks to the use of high-quality materials and a solid construction, the relay is resistant to external conditions such as temperature and humidity.
• Compliance with standards: The device meets the requirements of IEC 60529 standard, guaranteeing its safety and reliability.
• Easy installation: Direct or base UZ-63L mounting facilitates installation and servicing.
• Three-pole construction: Provides comprehensive protection for three-phase asynchronous motors.
• Impulse voltage: Withstands an impulse voltage of 6kV, increasing its resistance to overvoltages in the power supply network.
• For contactors: Compatible with MC-500a, MC-630a and MC-800a contactors.