Vacuum load switch

Abstract

The invention discloses a vacuum load switch for a high-voltage fixed switchgear, which includes an upper outlet of a knife switch, an isolation knife switch, an isolation knife seat, a vacuum interrupter, a lower movable contact, a lower outlet seat, a cable outlet plate, Isolation knife insulation pull rod assembly, arc extinguishing chamber insulation pull rod assembly, operating mechanism and grounding device, isolation knife switch is connected in series with vacuum interrupter, isolation knife insulation pull rod assembly and arc extinguishing chamber insulation pull rod assembly are all connected to the operating mechanism by transmission, isolation knife The seat, the vacuum interrupter and the lower outlet seat are solidly sealed together, and a fuse is connected in series between the lower outlet seat and the cable outlet plate. The invention integrates a vacuum load switch and a fuse, can effectively protect against lightning strikes and overcurrent, protects equipment, meets environmental protection requirements, and is convenient to assemble and use.

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 and fuse are separated, and the user can only connect it on the switch cabinet, which brings inconvenience to the user; the operating mechanism, isolation knife switch and vacuum interrupter in some vacuum load switches are fixed inside the In the sealed box of zero gauge pressure SF6 gas to prevent moisture intrusion and improve reliability, but 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 current Some vacuum load switches use soft connections at the moving end of the vacuum interrupter and the connection end of the isolation knife switch. Since the soft connection is electrified, the user can only add an insulating partition ...

AI Technical Summary

Problems solved by technology

[0002] The existing vacuum load switch and fuse are separated, and the user can only connect it on the switch cabinet, which brings inconvenience to the user; the operating mechanism, isolation knife switch and vacuum interrupter in some vacuum load switches are fixed inside the In the sealed box of zero gauge pressure SF6 gas to prevent moisture intrusion and improve reliability, but 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 current Some vacuum load switches use soft connections at the moving end of the vacuum interrupter and the connection end of the isolation knife switch. Since the soft connection is electrified, the user can only add an insulating partition to separate the busbar room from the cable room, reducing the load on the switch. The protection level of the cabinet 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 small, and the bellows of the vacuum interrupter are also very small when the soft connection is fastened. Cannot bear force, so it is difficult to assemble

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