Abstract: An arc splitter plate made of steel includes a pair of spaced parallel limbs which merge together at one end into a block forming a notch therebetween. Toward an end portion of the block remote from the notch is an insulated region which extends across a portion of a first face of the block, over a leading edge of the block, and onto a second face of the block. The insulated region is formed from an insulating means which is made from a tape including combined layers of an insulating material and an adhesive. The arc splitter plates are for use in arc chutes and more especially for use in cold cathode arc chutes.

Abstract: An arc chute for a circuit breaker includes a plurality of arc splitter plates 2, each plate having a pair of spaced parallel limbs 4,6 merging into a block portion. The arc chute also includes a pair of insulating barriers each containing a row of spaced channels arranged normally to a major longitudinal edge of the barrier, each channel encompassing one of the limbs 4,6 of each of the arc splitter plates. The insulating barriers may include a plurality of insulating members 12 each member having a protruding platform 28 and a stepped recess 17 such that two similar members may be engaged by superimposing one with the other with the protruding platform 28 of one engaging the stepped recess 17 of the other so as to provide a channel. The arc chute also includes a pair of arc conductors 32 which extend axially in register with respect to each other intermediate the barriers.