A switchgear and its voltage transformer with busbar support function

A technology for voltage transformers and switch cabinets, applied in the field of voltage transformers, can solve problems such as additional settings, and achieve the effects of reducing influence, good shielding, and simplifying the overall structure

Inactive Publication Date: 2019-01-18
STATE GRID CORP OF CHINA +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention provides a voltage transformer for a switchgear with a busbar support function to solve the problem that the voltage transformer in the prior art draws out secondary signals from the side and needs to be additionally provided with a shielding structure when it is directly installed in the switchgear technical problems; at the same time, the present invention also provides a switchgear using the above-mentioned voltage transformer

Method used

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  • A switchgear and its voltage transformer with busbar support function
  • A switchgear and its voltage transformer with busbar support function
  • A switchgear and its voltage transformer with busbar support function

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Embodiment Construction

[0022] Such as Figure 1 to Figure 3 As shown, an embodiment of a switch cabinet, the switch cabinet in this embodiment includes a cabinet body (not shown in the figure), the structure of the cabinet body is the same as that of the switch cabinet in the prior art, and will not be repeated here. A three-phase primary busbar 1 is provided in the cabinet, and a voltage transformer 2 with a busbar support function is respectively provided in the cabinet corresponding to each phase of the primary busbar. The specific fixed support of the voltage transformer 2 is set on the metal structure piece 4 on.

[0023] Specifically, the voltage transformer in this embodiment includes a hollow insulating support 23, which can be integrally casted with epoxy resin, and a busbar fixing fitting 21 is fixed on the top of the insulating support 23 to connect with the inside of the cabinet. The primary busbar 1 is conductively connected, and a signal output terminal 25 protrudes from the bottom of...

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Abstract

The invention relates to a switch cabinet and a voltage transformer thereof having a busbar support function. The voltage transformer comprises a hollow insulation pillar. The top end of the insulation pillar is fixedly provided with a busbar fixation fitting conductively and fixedly connected with a busbar; the bottom portion of the insulation pillar is provided with a bottom connection fitting for enabling the insulation pillar to be arranged on a metal structural piece in the switch cabinet; the bottom end of the insulation pillar is provided with a signal output end in clearance fit with an installation hole in the metal structural piece; and the insulation pillar is provided with a voltage divider for realizing voltage transmission between the busbar fixation fitting and the signal output end. The signal output end in the bottom of the voltage transformer is in clearance fit with the installation hole in the metal structural piece, and the metal structural piece can be utilized to carry out shielding protection on the signal output end, thereby ensuring good shielding, reducing influence of internal high voltage of the switch cabinet on signal transmission, and enabling the transformer output to be more precise and stable.

Description

technical field [0001] The invention relates to a switch cabinet and a voltage transformer with a bus bar supporting function. Background technique [0002] Usually, in order to realize the measurement of the busbar side voltage, the gas insulated switchgear usually installs a PT cabinet, and uses the voltage transformer in the PT cabinet to measure the busbar side voltage. In addition, special post insulators are usually set up to support the busbar. With the development of the power system towards large capacity, ultra-high voltage and ultra-high voltage, the requirements for miniaturization, intelligence and high reliability of power equipment are also getting higher and higher. Pillar insulators are installed in the existing switchgear to support the primary busbar, and a PT cabinet needs to be installed separately outside the switchgear, which requires a large installation space and does not meet the development requirements of the power system. [0003] In the Chines...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R19/00
Inventor 田志国赵成功袁亮颜语魏少鹏柴宏伟王晓丽范冬冬张贺朱明东张旭乐赵盼盼
Owner STATE GRID CORP OF CHINA
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