TF42-3.1 Thermal overload relay 1SAZ721201R1033

Motor Protection with Thermal Relay TF42-3.1

Thermal relay TF42-3.1 is a reliable device used to protect electric motors from overload. It provides effective protection for circuits in electrical installations, reacting to temperature increases caused by excessive load. It is a key element ensuring long-term and safe operation of motors in various industrial and domestic applications.

Construction and Application

The TF42-3.1 relay is designed to work with AF09 - AF38 series contactors. Its main task is to monitor the current flowing through the motor and trigger in case of exceeding the set threshold. This prevents overheating of the motor windings, which could lead to its damage or even fire. The current setting range in this model is from 2.3 to 3.1 A, allowing it to be adapted to a wide spectrum of motors with different power. Mounting is direct, which simplifies integration with the existing installation.

Functionality and Benefits

• Automatic reset: After the working conditions stabilize, the relay automatically returns to the ready state, allowing the motor to be restarted without manual intervention.
• Status indication: It has one normally open and one normally closed auxiliary contact and one changeover contact, which allows remote monitoring of the device status and integration with control systems.
• Safety: Release class 10 ensures a quick and precise response to overloads, minimizing the risk of damage to the protected circuit.
• Easy installation: Direct mounting method simplifies installation and reduces the time required to start up the system.
• Reset button: Allows manual resetting of the relay in emergency situations or after removing the cause of the overload.
• Versatility: The relay is compatible with a wide range of operating voltages up to 690 V, which increases its flexibility of application.
• Screw connections: Ensure a secure and durable connection of the power supply cables.

Technical specifications

The TF42-3.1 relay is characterized by high reliability and durability, making it an ideal solution for both professional installers and end-users looking for effective protection of their electric motors. The use of high-quality materials guarantees a long service life even in difficult working conditions.