Contactor UA75-30-00-RA-80 1SBL411024R8000

Contactor UA75-30-00-RA-80 1SBL411024R8000 – ABB – 3471522305800: The 3-pole contactors UA75-30-00RA for capacitor switching can be used in systems where the peak current is well over 100 times the nominal effective current. The contactors are supplied complete with their damping resistors and must be used without additional inductors. Their electrical life is 250,000 operations at Ue < 500 V and 100,000 operations at 500 V <= Ue <= 690 V. The UA..RA contactors are equipped with a special front block that allows the serial insertion of 3 damping resistors in the circuit guaranteed to limit the peak current when the capacitor bank is energized. Their connection also ensures the pre-charging of the capacitors in order to limit the second current peak when the main poles are switched on. By using resistors, the highest current peak of the capacitor at turn-on can be damped, regardless of its magnitude. The UA...RA series 3-pole contactors are of block design., - Main poles: 3 main poles, - Control circuit: AC operated with laminated magnetic circuit