Cutting device for electrified miniature bus

Abstract

The invention discloses a cutting device for an electrified miniature bus. The cutting device comprises a handle, a supporting frame, a fixed cutter and a movable cutter, wherein the top face of the supporting frame is fixed to the handle so that the supporting frame and the handle can be connected to form an L shape; the top face of the fixed cutter is fixedly mounted at one end of the bottom face of the supporting frame; the top face of the movable cutter is arranged at the other end of the bottom face of the supporting frame in a horizontally-moving mode, and a cutting mouth is formed by the left side face of the movable cutter and the right side face of the fixed cutter. A first insulating shell is wrapped on the outer surface of the handle and the outer surface of the supporting frame. A second insulating shell is wrapped on the left side face, the bottom face, the front face and the rear face of the fixed cutter. A third insulating shell is wrapped on the right side face, the bottom face, the front face and the rear face of the movable cutter. The cutting device has a good insulating property, dangerous points existing in secondary cutoff work of the miniature bus in the replacement process of a protective screen are reduced, power accidents are reduced, and meanwhile the working efficiency is improved.

Description

technical field [0001] The invention relates to a power maintenance tool, in particular to a live small busbar cutter. Background technique [0002] At present, for the protective screens with a voltage level of 10kV and above produced by domestic relay protection device manufacturers, the AC and DC power supplies and the secondary AC voltage required by the device must be connected from the small busbar on the top of each installation screen. The small busbars are mostly made of solid pure copper due to the requirements of the regulations, and the small busbars in the secondary installation project of the new substation are laid in the way of the whole connection, that is, although a row of protective screens are installed separately, the small busbars on the top of the screen But it is a whole, which causes that when the protective screen is replaced separately, it is necessary to cut off the live small busbar in operation before it can be withdrawn. Due to the narrow wor...

AI Technical Summary

Problems solved by technology

However, it is very dangerous to use cable cutters, because the jaws of the cable cutters are all made of metal materials. Opening the jaws can easily cause a short circuit between two adjacent small busbars or cause the small busbars to be grounded due to accidental contact with the top of the protective screen during cutting. Waiting for an accident

Relay protection personnel often use insulating tape to insulate the jaws before use. The single insulating tape often falls off due to excessive force of the cable clamp during the cutting process or breaks when it touches a sharp object. This requires personnel to cut off a The small busbar needs to be inspected once. If the insulation is damaged, it needs to be insulated again. The operation is cumbersome and the safety factor is low.

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