Circuit breaker size S3 for motor protection Class 10 with overload relay function A-trip 75...93 A N-trip 1300 A screw connection increased switching capacity 100 kA SIRIUS 3RV2 circuit breakers for motor protection with overload relay function for safe disconnection in case of short circuits and protection of consumers and systems against overload, as well as for safely isolating the system from the power supply. The compact and climate-resistant circuit breakers are optimized for use in consumer branches due to their low heat dissipation, and are naturally suitable for IE3/IE4 motors as well as for switching direct current. Worldwide approvals (e.g., IEC and UL/CSA) and applications in explosion-hazardous environments (ATEX or IEC Ex) are standard. Device variants are available for motor protection (also with overload relay function), system protection, short-circuit protection of starter combinations, transformer protection, as main and emergency stop switches, and for use in IT networks. They come with screw or spring-loaded connections for quick, maintenance-free, and vibration-resistant connections, and optionally with built-in auxiliary switches. The comprehensive accessories, such as auxiliary switches, auxiliary trip devices, signaling switches, etc., are uniform for all sizes. The use of various energy supply options, such as the associated SIRIUS 3RV29 supply system, significantly reduces the main circuit wiring. The 3RV2 circuit breakers replace the proven 3RV1 series. Simple, efficient, always up to date - the SIRIUS system modular concept.