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.
More about power contactors for switching motors
SIRIUS 3RT contactors, 3-pole, up to 250 kW
SIRIUS 3RT12 and 3TF6 vacuum contactors
SIRIUS 3RT25 contactors, 4-pole, 2 NO + 2 NC
Contactors can not only switch motors.
We also have specialists for other switching tasks, developed for your special needs.
SIRIUS 3RT.3 contactors, 4-pole, up to 525 A
SIRIUS 3RT.4 contactors for Non-inductive or slightly inductive loads (AC-1), 3-pole up to 2650 A
SIRIUS 3RT26 contactors for capacitive loads (AC-6b), 3-pole
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.
Contactor assemblies for star-delta (wye-delta) starting
Reversing contactor assemblies
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).
Power range 18.5 kW to 55 kW (screw type or spring type technology)
Power range 55 kW to 250 kW
Auxiliary contactors for control and auxiliary circuits.
SIRIUS 3RH2 contactor relays, 4- and 8-pole
3TG10 power relays/miniature contactors
