Vacuum loading switch

Abstract

The invention is concerned with a kind of vacuum load switch for high voltage fixed type switchboard, relating to upside wire of switch, insulated switch, insulated knife frame, vacuum interrupter, downside move contactor, downside wire frame, united terminal, cable leading line plank, insulated knife insulated perch assemblage, interrupter insulated perch assemblage, operation frame and grounding equipment. The insulated switch connects with vacuum interrupter, the insulated knife insulated perch assemblage and interrupter insulated perch assemblage connect with operation frame, and the insulated knife frame, vacuum interrupter and downside wire frame are closed together. The hinge end of insulated switch has contact spring that connects with insulated switch and insulated knife frame. The move end of vacuum interrupter has contact spring that connects with downside move contactor and downside wire frame. This invention has large insulated strength and modularization level, and the simple using is fit for production on scaled.

Description

technical field [0001] The invention relates to a high-voltage fixed switch cabinet, in particular to a vacuum load switch. Background technique [0002] The existing vacuum load switch, such as the ZN28-12 vacuum circuit breaker used in China, has exposed live parts, so it is greatly affected by the environment, has a high failure rate, and has low reliability. For this reason, the Chinese patent document CN1420514 discloses a vacuum automatic load switch on an integrated fully insulated pole, in which the operating mechanism, the isolation knife switch and the vacuum interrupter are all fixed in a sealed box filled with zero-gauge pressure SF6 gas. In order to prevent moisture intrusion and improve its reliability. However, SF6 gas is a greenhouse gas, and its greenhouse effect is 2500 times that of carbon dioxide, which has a great impact on the environment and does not meet environmental protection requirements. In addition, the existing vacuum load switch adopts soft ...

AI Technical Summary

Problems solved by technology

However, SF6 gas is a greenhouse gas, and its greenhouse effect is 2500 times that of carbon dioxide, which has a greater impact on the environment and does not meet environmental protection requirements.

In addition, the existing vacuum load switch adopts soft connection at the moving end of the vacuum interrupter and the connection end of the isolation knife switch. Since the soft connection is charged, the user can only add an insulating partition to separate the bus room and the cable room. The protection level of the switch cabinet is reduced, which brings inconvenience to the user; at the same time, due to the small installation space of the pole of the load switch, the guide gap of the moving end of the vacuum interrupter is also very small, and the vacuum interrupter's gap is small when fastening the soft connection. The bellows cannot bear force, so it is very difficult to assemble

Images