Thermal overload relay for MC185a-225a series contactor MT 120-185A MT-225 120-185A

Motor and Circuit Protection – Thermal Relay MT-225

The MT-225 thermal relay is a reliable protective element designed to work with MC-185a and MC-225a series contactors. Its main task is to protect electric motors and circuits from the effects of overloads, short circuits, phase asymmetry, and long-term starts. This device, based on bimetallic technology, provides effective and precise protection, minimizing the risk of damage and downtime in the operation of the installation.

Construction and Application

The MT-225 relay is characterized by the possibility of mounting both directly under the contactor and independently using a dedicated mounting base UZ-63L. This flexible solution allows adaptation to specific installation conditions and available space. This relay finds application in a wide range of industrial and commercial applications where reliable protection of electric motors with a rated current in the range of 120-185A is required. Thanks to this, it works well in power supply systems for pumps, fans, conveyors, and other devices using induction motors.

Functionality and Benefits

• Wide adjustment range: The MT-225 relay offers a current setting range from 120A to 185A, allowing precise adjustment to the characteristics of the protected circuit.
• Flexible mounting: The possibility of direct or UZ-63L base mounting facilitates installation in various configurations.
• High reliability: The bimetallic construction ensures stable and long-lasting operation of the device, guaranteeing effective protection against overloads.
• Status indication: It has built-in auxiliary contacts (1 NO and 1 NC), which allow remote monitoring of the relay status and integration with control systems.
• Protection against phase asymmetry: Protects motors against the negative effects of uneven phase loading.
• Protection against long starting times: Prevents damage to the motor caused by excessive starting time or its blocking.
• Manufacturer of a renowned brand: The device comes from LSIS (ANIRO LSIS), which is recognized in the electrical industry for the high quality of its products.

Thanks to these features, the MT-225 thermal relay is a solid and effective solution for ensuring the safety and reliability of electrical installations powering electric motors.