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siemens circuit breakersCircuit Breakers

Whether in large buildings or on industrial sites, in power stations or waterworks, on ships or oil rigs, the Siemens circuit-breakers can perform all switching and protective functions in even the most complex of AC and DC networks. Designed to meet the most demanding requirements, they make a decisive contribution to the reliable protection of your energy supply in electrical installations.


siemens overload relaysOverload Relays

SIRIUS overload relays are available in a thermal version and also in a solid-state version for higher requirements. They have the function of providing current-dependent overload protection for loads (e.g.motors) in the main circuit as well as the other switching and protective devices in the load feeder.

SIRIUS overload relays can be used to configure compact load feeders and that quite simply and in a space-saving fashion. This is because the overload relays are optimally harmonised to the other components (contactors, soft starters etc.) of the modular SIRIUS system - electrically, mechanically and as far as the optical design is concerned.

The modular SIRIUS system also includes standard accessories, which are used independent of the size and which match the 3RU11 thermal overload relay and the 3RB10 solid-state overload relay. This significantly simplifies engineering and minimises stock inventory costs.