Products

There are two versions of overload relays: thermal overload relays using bimetals and electronic overload relays using current transformers.

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.

SIRIUS 3RB electronic overload relays

The SIRIUS 3RB electronic overload relays ensure real commercial added value: in the main circuit, the 3RB30 electronic overload relays for standard applications are responsible for current-dependent overload protection of electrical loads (e.g. motors). Due to the wide current setting ranges and various tripping characteristics, complete series of motors are covered with just a few types. The 3RB31 version offers enhanced functions, such as an integrated, electrical remote reset or ground fault detection to name but a few.