3RU thermal overload relays

SIRIUS overload relays with screw-type, spring-loaded or ring cable lug connections reliably protect loads as well as other switching and protective devices in the respective load feeder against overload, phase asymmetry and phase failure. Thanks to ATEX certification, they can be used in many different applications and are even suitable for protecting motors designed for use in explosive environments. The overload relays can easily be used with the contactors of the SIRIUS module kit.

SIRIUS 3RU thermal overload relays
In the main circuit, the SIRIUS 3RU thermal overload relays are responsible for current-dependent overload protection of electrical loads (e.g. motors). The 3RU2 overload relays are available with spring-loaded, screw-type and ring cable lug connections - for a particularly flexible and cost-effective implementation.