Voltage transformer protection switch, size S00 3 A, N-trigger 20 A, 1W with horizontally mounted auxiliary switch, SIRIUS 3RV1 circuit breaker for distance protection for use in conjunction with voltage transformers. The compact and climate-resistant circuit breakers are optimized for use in consumer branches due to their low heat dissipation, and are of course suitable for IE3/IE4 motors. Global approvals and applications in explosion-hazardous environments are standard. The voltage transformer protection switches are available with three different rated currents. Optional side auxiliary switches are available as accessories. Simple, efficient, always up-to-date - the SIRIUS system modular concept.