Patent ID: 8619396
Filing Date: 2013-12-31
Classification: H01H

Abstract:
1. An electrical switching apparatus for connecting or disconnecting a DC source from a load comprising: a first input terminal, a second input terminal, a first output terminal, a second output terminal, a fuse, a fuse disposition switch that is open when said fuse is open and is closed when said fuse is intact, a first contactor and a second contactor wherein each said contactor comprises; (a) a pair of normally open electrical contacts, (b) a first and a second terminal, each connected to a unique contact of said pair of normally open electrical contacts, and (c) a control coil that closes said pair of normally open electrical contacts when powered and wherein a circuit is formed with: (i) a unique common coupling of the first input terminal, the first terminal of the first contactor and a first fuse terminal, (ii) a unique common coupling of the second terminal of the first contactor, the first output terminal and the second terminal of the second contactor, (iii) a unique common coupling of a second fuse terminal and the first terminal of the second contactor, (iv) a unique common coupling of the second input terminal and the second output terminal, (v) a drive circuit “A” consisting of a series connected circuit of said fuse disposition switch and the control coil of said first contactor and (vi) a drive circuit “B” consisting of the control coil of said second contactor.