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Switch device

A switchgear and grounding switch technology, applied in electrical switches, substations/switchgear boards/panels/desks, electrical components, etc., can solve the problem that the grounding switch cannot be closed, simplify the wiring method and reduce the footprint area, the effect of improving the service life

Active Publication Date: 2014-11-12
STATE GRID CORP OF CHINA +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is to provide a switchgear to ensure that the earthing switch cannot be closed when the circuit breaker is closed

Method used

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Embodiment Construction

[0021] Embodiment 1 of the present invention, such as Figure 1-9 Shown: switchgear, support 31, the top of support 31 is equipped with isolating circuit breaker 25 and earthing switch. In order to reduce the footprint of the switchgear, the present invention assembles the grounding switch on the beam 32 of the isolating circuit breaker. In order to prevent the grounding switch from closing when the isolating circuit breaker is closed, the present invention designs a locking device between the isolating circuit breaker and the grounding switch.

[0022] The grounding switch includes three mechanically linked grounding knife bars 11, the roots of which are hinged on the beam 32, and the grounding knife bars 11 can swing up and down 90 degrees in the vertical plane. This design cleverly assembles the static contact 14 of the grounding switch on the lower connection terminal 14 of the isolating circuit breaker 25, and assembles the moving contact 15 of the grounding switch on th...

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PUM

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Abstract

The invention relates to the technical field of high voltage electrical equipment, in particular to a switch device. The switch device comprises an isolation circuit breaker, and a grounding switch is assembled on a cross beam of the isolation circuit breaker. The grounding switch comprises three mechanical linkage grounding cutter bars which can swing and rotate up and down in a vertical plane. The root portions of the grounding cutter bars are hinged to the cross beam, and the grounding switch further comprises movable contacts assembled on the tip portions of the grounding cutter bars and fixed contacts mounted on a lower wiring terminal of the isolation circuit breaker. The cross beam is provided with an isolation circuit breaker spindle which is arranged to be close to and parallel to a cutter bar rotating shaft of one grounding switch, and a locking device used for preventing the grounding switch from being switched on when the isolation circuit is switched on is arranged between the cutter bar rotating shaft of the grounding switch and the isolation circuit breaker spindle. The switch device can guarantee that the grounding switch can not be switched on when the circuit breaker is switched on, and greatly improve the safety and the service performance of the switch device.

Description

technical field [0001] The invention relates to the technical field of high-voltage electrical equipment, in particular to switchgear. Background technique [0002] In the international standard IEC 62271-108, the definition and use requirements are given for the isolating circuit breaker with a voltage level of 72.5kV and above, and a clear definition is given for the isolating circuit-breaker (Disconnecting circuit-breaker): DCB has an isolating switch Functional circuit breaker, when the contact is in the opening position, this circuit breaker can realize the function of isolating switch. Isolating circuit breakers include circuit breakers, isolating switches, transformers and other devices. In the existing switchgear, the grounding switch is usually arranged under the isolating circuit breaker. The switchgear occupies a large space, and the installation performance of the switchgear is low, and it cannot ensure that the grounding switch is opened when the isolating swit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02B1/04H01H9/26
Inventor 马永旭王占杰钟建英孙玉洲仝永刚夏立国杨葆鑫
Owner STATE GRID CORP OF CHINA