Vacuum drop-out-type switch

Abstract

The invention discloses a vacuum drop-out-type switch. A drop-out action mechanism of the vacuum drop-out-type switch comprises a support frame, a first hinge base, a second hinge base, a crank arm, afirst permanent magnet action mechanism and a base. The first hinge base, the second hinge base and the first permanent magnet action mechanism are mounted on the support frame. A first connection plate is mounted on the first hinge base. One end of the first connection plate is hinged with the first hinge base, and the other end of the first connection plate is hinged with the upper portion of the base. A second connection plate is mounted on the second hinge base. One end of the second connection plate is hinged with the second hinge base, and the other end of the second connection plate ishinged with the middle of the crank arm. One end of the crank arm is hinged with a driving rod of the first permanent magnet action mechanism. The other end of the crank arm is connected with the lower portion of the base. The lower end of a tube of a vacuum switch component is fixedly connected with the base. A main connection terminal is arranged at the top end of the tube. An outgoing-line terminal is arranged in the middle or on the lower portion of the tube. A vacuum envelope, an insulating body and a second permanent magnet action mechanism are arranged in the tube from top to bottom. The vacuum drop-out-type switch has the advantages that power restoration can be realized in case of transient faults, a separating brake can drop out in case of non-transient faults, accident points are easy to judge, and remote closing operation can be realized.

Description

technical field [0001] The invention discloses a vacuum drop switch, which belongs to the field of transmission line protection devices. Background technique [0002] At present, the short-circuit tripping of the line is performed by manual inspection. After the fault is eliminated, it also needs to be closed manually. Instantaneous, because the passage of high current will burn out foreign objects or shoot down birds, so that the short-circuit fault caused by the above reasons will disappear immediately. In this case, there will be no problem as long as the switch is reclosed. It is not a permanent fault, but the traditional fuse drop The switch must be replaced by the staff on site, and the power supply can be restored by manual closing. Due to the dense network of power transmission and distribution lines in our country, it is very labor-intensive and time-consuming to inspect and inspect the line when the line fails. It is even more difficult to maintain and close the l...

AI Technical Summary

Problems solved by technology

[0002] At present, the short-circuit tripping of the line is performed by manual inspection. After the fault is eliminated, it also needs to be closed manually. Instantaneous, because the passage of high current will burn out foreign objects or shoot down birds, so that the short-circuit fault caused by the above reasons will disappear immediately. In this case, there will be no problem as long as the switch is reclosed. It is not a permanent fault, but the traditional fuse drop The switch must be replaced by the staff on site, and the power supply can be restored by manual closing. Due to the dense network of power transmission and distribution lines in our country, it is very labor-intensive and time-consuming to inspect and inspect the line when the line fails. It is even more difficult to maintain and close the lines erected in high mountains or in uninhabited areas; it leads to delays in restoring power supply, high labor costs, and it is difficult to find the accident point

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