Knife switches are electric

The knife switch of ABB OT 100E3 is the hand-operated electric switching device intended for inclusion, shutdown and switching of electric chains - or under loading (at voltage up to 220 in on a direct current and to 380 in on variable), or in lack of current. Knife switches of ABB OT 100E3 differ in a characteristic form of mobile contacts - nozhevidny, or "cutting". On number of contacts knife switches of ABB subdivide into one - two - three and multi-polar. For increase of the limit disconnected current powerful knife switches of ABB are supplied with dugogasitelny chambers. At short circuit of a unipolar knife switch of ABB the contact knife under the influence of the handle turns around an axis and "gets the idea" of the motionless springing contact rack.