TF42-1.7 Thermal overload relay 1SAZ721201R1028

Motor protection with thermal overload relay TF42-1.7

Thermal overload relay TF42-1.7 is an economical and reliable device designed to protect motor circuits against overload and phase failure. It provides a quick response in case of a fault, minimizing the risk of damage to connected devices. It is a key element of electrical installation protection, especially in industrial and commercial applications.

This model, with a current setting range of 1.3…1.7 A, is dedicated to cooperation with AF09 - AF38 series contactors, offering comprehensive motor protection with appropriate power. The device's construction allows for easy direct mounting, and additional functions, such as automatic or manual reset, increase flexibility of use.

Functionality and application

The TF42-1.7 relay is characterized by a tripping class of 10, which means precise and fast reaction to current changes. It has a built-in normally open (NO) and normally closed (NC) auxiliary contact, which allows integration with control systems and alarm signaling. Thanks to temperature compensation, it ensures stable operation in various environmental conditions. The device is equipped with a reset button, making it easier to restore operation after tripping.

Application:

• Electric motor protection
• Industrial installations
• Motor control systems
• Applications requiring reliable protection against overload and phase failure

Characteristics and benefits

• Wide current setting range: 1.3…1.7 A – allows adaptation to different motor loads.
• Automatic or manual reset: increases flexibility of use and adaptation to the specifics of the application.
• Built-in auxiliary contacts: enable integration with control systems and alarm signaling – information about tripping is transmitted to the superior system.
• Temperature compensation: ensures stable operation in various environmental conditions – regardless of the ambient temperature, the relay's operating characteristics remain constant.
• Direct mounting: simplifies installation and reduces mounting costs – no need for additional mounting elements.
• Tripping class 10: ensures a quick and precise response to overloads – minimizes the duration of the overload and reduces the risk of motor damage.
• Resistance to environmental conditions: Operation at temperatures from -25…+60°C and resistance to shocks and vibrations ensure reliable operation even in harsh industrial conditions.
• Compliance with standards: Meets the requirements of IEC/EN 60947-1, IEC/EN 60947-4-1 and IEC/EN 60947-5-1 standards, which guarantees the safety and reliability of the device.

The TF42-1.7 relay is a solid solution for professionals looking for reliable protection of electric motors, as well as for end-users who value safety and long-term operation of electrical installations.