Method for maintaining indoor busbar knife brake movable contact without power-off of high pressure busbar

Abstract

The invention relates to a method for repairing indoor bus knife switch moving contact of high tension bus without power failure. The technical proposal includes following steps: breaking high-voltage circuit-breaker to be repaired, pulling bus knife switch, checking whether the moving and static contact is cut off or not and without foreign body; assembling electrification repair dielectric isolation baffle based on pulling bus knife switch moving, static contact surrounding electric equipment condition, shouldering assembled electrification repair dielectric isolation baffle with the insulating rod to put and pull between the moving, static contacts of the bus knife switch, after completely effective separating the electrification part, performing repair of the bus knife switch moving, static contacts; after work to be repaired is completed, withdrawing the electrification repair dielectric isolation baffle with the insulating rod and restoring electric transmission. The invention has beneficial effects of reducing power failure scope, making time of bus power failure processing failure decline, ensuring power supply reliability, improving work efficiency greatly and realizing quick response and operation.

Description

1. Technical field: [0001] The invention relates to a method for overhauling the moving contact of the knife brake of the indoor busbar, in particular to a method for overhauling the moving contact of the knife gate of the indoor busbar for the high-voltage bus without power failure. 2. Background technology: [0002] At present, the indoor 6-10kV high-voltage switch switch often has faults such as deformation of the moving contact blade, heat generation, and pressure spring fatigue during use. At this time, the switch must be pulled out for maintenance. After the knife switch is opened, the opening distance between the dynamic and static contacts is only 20cm-35cm, the angle is 45°-60°, and since the static contact is directly connected to the side of the busbar, after the knife switch is opened, its The maximum distance between the moving contact and the side-phase busbar is only 40cm, and the maximum distance between the two sides and the live parts of the adjacent switch...

AI Technical Summary

Problems solved by technology

[0004] There are following problems in the above-mentioned method: the one, a group of knife switch failure power outage maintenance will make all power supply loops on this section bus stop power outage, expand the scope of accident power outage, prolong the power outage time of accident handling, cause national production and resident's life electricity consumption Second, the operation is cumbersome, which increases the workload of the shift operator, especially in the operation place where the main wiring of the substation is complex, which can easily cause potential safety hazards; the third is that the time for maintenance to wait for the bus power outage is too long, and the work efficiency is too low. Unable to achieve quick work

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