SIRIUS overload relays are available in thermal and solid-state versions. The can be directly mounted to SIRIUS 3RT contactors and 3RA reversing contactors or separately mounted in the control panel.

3RU1 thermal and 3RB20/21 solid-state versions provide current-dependent overload protection of motor loads.

The modular 3RB22/3RB23 solid-state overload relays offer a higher level of functionality and protection. These devices not only protect your loads as a function of the current, but also as a function of the temperature when a PTC thermistor sensor is connected. The PTC sensor directly measures the temperature of the motor windings which is then evaluated by the relay.

Our SIMOCODE pro motor management system is the optimum choice when your application calls for even more extensive control functions. These include user-friendly diagnostic capabilities and high-performance communications with PROFIBUS DP.

3RU11 - Thermal Overload Relays

3RB20 / 21 - Solid State Overload Relays for Standard Applications

3RB22 / 23 - Solid State Overload Relays for High Feature Applications

3UF7* - SIMOCODE pro Motor Management and Control Devices