Decoupling Of Early Break Arcing Contact Block For Capacitor Switching

Abstract

The present invention relates to a decoupling/isolating system for early break arcing contact block in capacitor switching contactors. The system comprises housing (1) which includes plural cover assemblies comprising side, rear and front covers (2, 12). The side cover assembly (12) comprises decoupling means so as to de-latch the front cover assembly from rear cover assembly for coil replacement. Front cover assembly comprises arc interruption means, fixed contact assembly means for the main, a mobile assembly means carrying the bridge assembly means for the main contactor and moving magnet assembly means. Arc interruption means are placed in slotted rib provided in each pole of front cover of the contactor. The bridge assembly means (6) along with the mobile assembly means (8) are secured and guided in the front cover. The bridge assembly means comprises mechanically coupled bridge-I and bridge-II and rest in a predetermined position by a co-operating means. A top block (13) located on the bridge means (6) in a manner that top block (13) along with bridge-II is operatively interlocked with main bridge assembly of basic contactor comprising main contact and arcing contact having resistor means connected to it in a manner to be isolated from the circuit for reducing the over travel of the arcing contact thereby dampening the inrush current hence quenching the arc.

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