Thermal overload relay, TeSys K, 0.36-0.54A, class 10 LR2K0304

Motor protection with TeSys K thermal overload relays

The TeSys K series LR2K0304 thermal overload relay is a reliable protective device designed to protect electric motors from overload. This device, manufactured by Schneider Electric, provides effective protection in industrial and commercial applications. Designed to work with TeSys contactors, it offers easy installation and integration into control systems.

Functionality and application

The LR2K0304 relay is ideal for protecting three-phase motors with a power of up to 0.12 kW at 400V. Its current setting range (0.36...0.54A) allows for precise adjustment to the load characteristics. Built-in auxiliary contacts (1NO+1NC) enable device status signaling and remote control of auxiliary circuits. In addition, the relay has automatic and manual reset functions, which increase its flexibility.

The use of this type of relay is crucial wherever protection of motors against damage caused by overload or phase failure is required. This makes it possible to minimize downtime and repair costs.

Characteristics and construction

The LR2K0304 relay is characterized by a solid construction and high reliability. Direct mounting under the LC1K contactor (bottom terminals) simplifies installation and provides a compact solution. Screw connection of the main contacts guarantees secure and durable electrical connections. The housing with a transparent, sealable cover protects the internal elements from mechanical damage and unauthorized interference.

It is worth noting the built-in reset button, which allows for quick restoration of the device's operation after removing the cause of the trip, as well as a test slide switch allowing to simulate the trip in order to check the correct operation of the protection system. Additionally, the device has a flag indicator signaling the tripped state.