Patent ID: 9208974
Filing Date: 2015-12-08
Classification: H01H

Abstract:
1. A disk type off-circuit tap changer, comprising: a switch base; and a rotation shaft, wherein an upper end of the rotation shaft is connected to an operation positioning mechanism, a lower end of the rotation shaft is connected to moving contacts, wherein the moving contacts fit with fixed contacts circumferentially arranged at a lower side of the switch base, and wherein the fixed contacts are directly embedded into the switch base to form an integrated body with the switch base, wherein the fixed contacts and the switch base are integrally formed through injection molding or compression molding; and wherein the moving contact is an upper-and-lower clip-type moving contact and comprises an insulating drive plate and upper-and-lower clip moving contact pieces, wherein a ternate slot is formed at the middle of the insulating drive plate and is connected to a lower end of the rotation shaft in an insertion manner, the upper-and-lower clip-type moving contact pieces fit with the fixed contacts circumferentially arranged at a lower side of the switch base, and each upper-and-lower clip moving contact piece has three moving contact terminals circumferentially arranged and nonconductive to each other, wherein the fixed contact is in a shape of a cylinder with a front end extending into an inner cavity of the switch base to form a contact terminal, and a rear end extending out of the switch base and being bent downwards to form a wiring end, wherein the cylindrical fixed contact is a hollow tube and is manufactured by using a copper tube material, wherein three sets of fixed contacts corresponding to the moving contacts are disposed, each set of fixed contacts comprises six fixed contacts, each upper-and-lower clip-type moving contact piece spans between two fixed contacts in each corresponding set, so as to perform translocation and transformation, thereby forming the three-phase disk type off-circuit tap changer.