The TeSys LR9 series, including LR9D and LR9F models, are electronic thermal overload relays designed to provide reliable protection against overheating in motor circuits. Here are the key features:

1. Electronic Thermal Overload Relays: These relays are designed to protect motors from overheating by monitoring the motor current and tripping the circuit if it exceeds a preset threshold. Unlike traditional thermal overload relays, which use bimetallic strips, electronic relays offer greater precision and accuracy in detecting overloads.
2. Part of TeSys: As part of the TeSys product range, the TeSys LR9 relays benefit from Schneider Electric's expertise in motor control and protection. They are designed to meet high-quality standards and are suitable for use in a wide range of industrial applications.
3. Models LR9D and LR9F: The LR9 series includes two models: LR9D and LR9F. Both models offer electronic thermal overload protection, with LR9F specifically designed for use with the TeSys D contactors. These relays provide enhanced coordination and compatibility within motor control systems.
4. Wide Range of Protection: The TeSys LR9 relays offer protection for motors up to 315 kW, providing coverage for a wide range of motor sizes and applications. This versatility makes them suitable for use in various industrial environments.
5. Compact and Reliable: These relays feature a compact design, making them easy to install and integrate into motor control panels and electrical enclosures. They are also highly reliable, offering consistent performance and accurate tripping characteristics under varying operating conditions.

Overall, the TeSys LR9 series electronic thermal overload relays offer a reliable and efficient solution for motor protection against overheating. With their electronic design, wide range of protection, and compatibility with TeSys contactors, they provide an effective means of safeguarding motors in industrial applications.