A circuit breaker and gas-insulated switchgear using the same

A technology of circuit breaker and insulating frame, which is applied in the field of power distribution, can solve the problem of not reducing the influence of the higher potential at the tip of the motor exposed in the arc extinguishing chamber, and is conducive to miniaturized design, avoiding the influence of insulation performance, and improving electrical The effect of insulating properties

Active Publication Date: 2021-08-06
HENAN PINGGAO GENERAL ELECTRIC CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a circuit breaker to solve the technical problem in the prior art that the installation of cold-shrinkable insulators on the insulating main shaft of the circuit breaker cannot reduce the influence of the high potential at the tip of the exposed motor in the arc extinguishing chamber; at the same time, the present invention also provides A gas insulated switchgear using a circuit breaker

Method used

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  • A circuit breaker and gas-insulated switchgear using the same
  • A circuit breaker and gas-insulated switchgear using the same
  • A circuit breaker and gas-insulated switchgear using the same

Examples

Experimental program
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Effect test

Embodiment 1

[0082] Such as Figure 7 As shown, the circuit breaker 100 in this embodiment can be as Figure 7As shown, the circuit breaker 100 is installed in the gas box 400 of the gas insulated switchgear such as the ring network cabinet, and the circuit breaker 100 is driven by the operating mechanism 101 installed outside the gas box 400 to realize the opening and closing operation. The external lead wire row of the arc chamber is conductively connected to the corresponding incoming line bushing 300 through the incoming line branch row 200. When the wiring bushing 300 is used as an external terminal and electrically connected to the external cable, the ring main unit is connected to the power grid to realize the ring main unit. The normal operation of the network cabinet.

[0083] In this embodiment, in order to meet the requirements of environmental protection, the air tank 400 is filled with an environment-friendly gas, specifically dry air or nitrogen, etc., as long as it meets th...

Embodiment 2

[0114] The main difference between it and Embodiment 1 is that in Embodiment 1, the main shaft supporting frame is a conductive part, so the supporting connection part on the main shaft supporting frame is arranged in the shielding cover. In this embodiment, the main shaft supporting frame is As for the insulator, if the support strength is satisfied, the support connection part on the main shaft support frame can be designed as a support shaft passing through the shielding cover, and the support shaft can be clamped and assembled with the corresponding clamping hole on the insulating side plate.

[0115] In addition, when the main shaft support frame is an insulating part, other conductive connection methods need to be provided to realize the conductive connection between the movable conductive rod and the shielding cover, for example, a conductive soft connection structure is provided between the shielding cover and the movable conductive rod to ensure conductive connection. ...

Embodiment 3

[0117] It differs from Embodiment 1 mainly in that: in Embodiment 1, heat dissipation through holes are provided on the shield without affecting the uniform electric field. In this embodiment, if the applied voltage of the circuit breaker is low, the When the heat is not large, the heat dissipation via holes can also be omitted.

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Abstract

The present invention relates to the technical field of electric power distribution, in particular to a circuit breaker and a gas insulated switchgear using the circuit breaker. The circuit breaker is provided with a shielding cover for the exposed conductive part of the arc extinguishing chamber, and the shielding cover is fixed on the main shaft support frame. above, so that the space between the shielding case and the insulating frame and between the shielding case and the arc extinguishing chamber shell are evenly spaced, and the shielding case is conductively connected with the exposed conductive part of the arc extinguishing chamber, and is set on the Outside the exposed conductive part of the arc extinguishing chamber, the shielding cover has a smooth outer surface for uniform electric field; the shielding cover is provided with a spindle hole for the gap of the insulating spindle to pass through; the shielding cover is also provided with a lead row perforation hole . When in use, the shielding cover is used to shield the internal electric field and even out the external electric field to effectively reduce the influence of the higher potential at the tip of the exposed conductive part.

Description

technical field [0001] The invention relates to the technical field of power distribution, in particular to a circuit breaker and a gas insulated switchgear using the circuit breaker. Background technique [0002] SF 6 Gas is an excellent electrical gas, but also a greenhouse gas. At present, some countries have begun to control SF 6 A carbon tax is imposed on the use of domestic and foreign SF 6 The use of gas will be more and more restricted, therefore, for gas-insulated fully enclosed ring network cabinets, go to SF 6 Globalization has important significance for environmental protection and has become the direction of development. Considering environmental protection issues, more and more ring main units use environment-friendly gases (such as dry air, nitrogen, etc.), such as the environment-friendly gas-insulated ring main unit disclosed in the utility model patent with the authorized announcement number CN206135290U. Circuit breaker, the circuit breaker includes th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01H71/02
CPCH01H71/0221
Inventor 赵辉王焕许海超卓会丹沈景贵高正付张海张梦柯王强刘永豪高胜豪侯宾宾张建民
Owner HENAN PINGGAO GENERAL ELECTRIC CO LTD
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