For controlling electric drives and motors, our contactors are a classic product with a decades-old operating principle interpreted in an up-to-date and future-driven way – generalists for controlling motors. In combination with SIRIUS 3RC7 intelligent link modules, our contactors are now even more versatile.
SIRIUS contactors portfolio
Power contactors for switching motors
Switching of electric drives or motors: a classic product with a decades-old functional principle interpreted in a modern and future-oriented way: these are our contactors, a generalist for switching motors.
Whether switching normal motors or high-efficiency motors (IE3), whether reversing or star-delta starting from the smallest to the largest power range, whether classic screwing or connecting using spring-cage technology or direct digital control. Our motor contactors can do all this and much more. No drive is too small or no motor start-up too heavy.
Contactors with certified F-PLC input
SIRIUS contactors with certified F-PLC input are available for your application for triggering from failsafe controllers, standard controllers and safety switchgear from 18.5kW up to and including 250kW.
The fail-safe inputs make it possible to achieve SIL 2 (IEC 62061) or PL c (ISO 13849-1) with only one contactor. SIL 3 or PL e can be achieved by using two contactors in series.
The Safety Evaluation integrated in the TIA Selection Tool (TST) helps you to evaluate your machine quickly and safely, taking into account its safety functions (evaluation according to IEC 62061 and ISO 13849-1).
Contactors can not only switch motors
We also have specialists for other switching tasks, developed for your special needs.
Contactor relays and miniature contactors
Auxiliary contactors for control and auxiliary circuits.
Contactor combinations
Star-delta combinations
Star-delta combinations are the reliable solution for the staged startup of asynchronous machines. The starting current is reduced by one third compared to a delta startup. The required ramp-up time up to the rated speed in star startup can be set via a timing relay.
Reversing contactor assemblies
For safe and reliable changes in the direction of rotation of asynchronous motors, the pre-assembled SIRIUS reversing combinations from 3 kW to 55 kW (self-assembly kit from 3 kW to 250 kW) are available. They consist of two contactors of the same rating with an NC contact from 3 kW to 7.5 kW or an NO contact and an NC contact from 5.5 kW to 55 kW in the basic unit.
Rugged and reliable
SIRIUS 3RT contactors Thanks to their extreme ruggedness and outstanding contact reliability, our contactors switch supremely and reliably. In addition, they enable compact control cabinets with high packing density. With integrated ranges of accessories for sizes S00 to S3 as well as S6 to S12, individual function expansions can be implemented with no great effort. In sizes S00 to S3, the contactors even have the auxiliary switches integrated into the enclosure.
Reliable switching and protection of large currents
SIRIUS 3RT contactors up to 2,650 A – the perfect combination for wind turbines or converters.
Efficient wiring of switchgear
Which connection technology do you use for your switchgear? Have you already tried out spring-cage technology? Now compare conventional screw technology with modern spring-cage technology. We will show you how to connect and install your switchgear quickly and without errors.