The Siemens Circuit breaker size S3 for system protection with approval circuit breaker UL 489, CSA C22.2 No.5-02 A-release 30 A N-release 390 A screw terminal Circuit breaker SIRIUS 3RV2 For system protection according to UL 489/CSA C22.2 No. 5 for the short-circuit protection of systems and loads in plants configured in accordance with UL. Thanks to their low heat loss, the compact and climate-resistant circuit breakers are optimized for use in load feeders, and also for IE3/IE4 motors, of course, and equally for the switching of direct current. Worldwide approvals (e.g. IEC and UL/CSA) and applications in hazardous areas (ATEX or IEC Ex) are a matter of course. Device versions are available for motor protection (also with overload relay function), plant protection, short-circuit protection of starter combinations, transformer protection, as main and EMERGENCY OFF switches and for use in IT networks.
Simple, efficient and always up to date - SIRIUS modular system The comprehensive range of accessories, such as auxiliary switches, auxiliary releases, signalling switches etc is standardized for all sizes
