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switchgear

A switchgear and grounding switch technology, which is applied to electric switches, substations/switchgear boards/panels/desks, electrical components, etc., can solve problems such as the grounding switch cannot be closed, and achieve simplified wiring methods and reduced land occupation area, the effect of simplifying the design

Active Publication Date: 2016-10-19
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 switchgear. The switchgear includes an isolating circuit breaker, and the beam of the isolating circuit breaker is equipped with a grounding switch. The grounding switch includes three mechanically linked grounding knife bars that can swing up and down in the vertical plane. The root of the grounding knife bar is hinged on the beam. The grounding switch also includes a moving contact assembled on the tip of the grounding knife rod and a static contact installed on the lower terminal of the isolating circuit breaker. The shaft of the rod is arranged close to parallel, and a locking device for preventing the closing of the grounding switch when the isolating circuit breaker is closed is provided between the shaft of the grounding switch cutter bar and the main shaft of the isolating circuit breaker. The invention can ensure that the grounding switch cannot be closed when the circuit breaker is closed, and greatly improves the safe use performance of the switchgear.

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 Patents(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