As main contactor and as special versions with up to 6 poles as rotor short-circuit contactors. Versions available for rotor current up to 3800A and rotor voltage up to 4200V.
As main contactor, Y contactor and D contactor for motors up to 1300kW. A resistor is connected into circuit during the transition from star to delta, thus the motor speed will be basically the same and minimize the current peaks.
As main contactor, transformer contactor and star contactor for motors up to 1000kW.
Alternator field discharge (or field circuit breakers) are used to control the field winding of synchronous machines or exciter machines. In case of disturbances, the contactors ensure a definite disconnection from the supply source and the subsequent discharge of the energy stored in the machine magnetic circuit via a discharge resistor. The contactors are normally configured with
Shunt and series motors up to 5000A and 15000VDC.