On-line monitoring grounding wire lead-out structure of high-voltage sleeve

A high-voltage bushing and lead-out structure technology, which is applied in the field of nuclear power, can solve problems such as the inability to install bushing grounding current measurement components, and achieve the effects of ensuring electrical connection and sealing performance, good electrical connection and sealing performance, and reliable online insulation monitoring

Inactive Publication Date: 2010-05-19
GUANGDONG NUCLEAR POWER JOINT VENTURE +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a high-voltage bushing on-line monitoring grounding wire lead-out structure, aiming to solve the problem that the bushing grounding current measuring element cannot be installed when the grounding wire at the end screen of the bushing is led out

Method used

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  • On-line monitoring grounding wire lead-out structure of high-voltage sleeve
  • On-line monitoring grounding wire lead-out structure of high-voltage sleeve
  • On-line monitoring grounding wire lead-out structure of high-voltage sleeve

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Embodiment 1

[0031] See figure 1 , the existing high-voltage bushing end screen structure of the main transformer includes a high-voltage bushing 2 and a terminal 5, the terminal 5 can be a cylindrical or flat pin-shaped structure, the lower end is fixed on the bushing 2, and the upper end passes through the high-voltage bushing 2 The center hole protrudes outward, and there is a copper column 3 with a tapered end on the upper end. A spring 4 is arranged under the copper column 3, which is placed on the lower end of the terminal 5. A cap 1 is screwed on the sleeve 7. Through the cap 1 The cover can isolate the terminal 5 from the outside world.

[0032] see figure 2 According to the above-mentioned existing final screen structure, an outer casing 11 is designed to replace the above-mentioned cap 1. The outer casing 11 contains a hollow cavity, and the hollow cavity structure can be gradually reduced in diameter from bottom to top. Small stepped inner cylindrical structure (the cavity in...

Embodiment 2

[0040] See image 3 , another existing main transformer high-voltage bushing end screen structure includes a high-voltage bushing 2' and a terminal 5'. The terminal 5' can be a cylindrical or flat pin-shaped structure, and the lower end is fixed on the high-voltage bushing 2 ', the terminal 5' can be isolated from the outside world through the cover of the cap 1'.

[0041] see Figure 4 According to the above-mentioned existing final screen structure, the second embodiment of the present invention designs a jacket 21 to replace the above-mentioned cap 1'. The diameter size should match the size of the inner hole of the high-voltage bushing 2', and its outer surface is processed with external threads, which can be spirally connected with the high-voltage bushing 2'; in the hollow cavity of the jacket 21, a conductive rod 22 is also arranged, placed in the jacket In the upper part of the cavity in 21, one end (bottom) of the conductive rod 22 is provided with a central hole, a...

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Abstract

The invention provides an on-line monitoring grounding wire lead-out structure of a high-voltage sleeve, comprising a high-voltage sleeve and a connecting terminal. The structure is characterized by also comprising a jacket the bottom end of which is connected with the high-voltage sleeve, wherein the jacket comprises a cavity, and the cavity is internally provided with a conducting rod; one end of the conducting rod is connected with the connecting terminal, while the other end extends out of the jacket and is connected with a connecting element; and an insulating filler block is arranged between the jacket and the conducting rod. In the invention, the newly designed jacket is used for replacing an original cap, and other separated and insulated parts are matched with the jacket, thus the structure can be directly arranged on the existing high-voltage sleeve tap structure without changing other relational structures. The structure not only reliably achieves the on-line insulated monitoring of the high-voltage sleeve, but also saves the processing and mounting cost, is quite convenient to use and can guarantee good electric connection and sealing property.

Description

technical field [0001] The invention belongs to electric equipment in the technical field of nuclear power, and in particular relates to a design of a lead-out structure of a ground wire lead-out terminal of a test terminal of a high-voltage bushing of a main transformer. Background technique [0002] The high voltage bushing of the main transformer is the main component of the power equipment in the nuclear power field. Due to some problems in manufacturing and operation, the fault of the high voltage bushing of the main transformer has become one of the common faults of the main transformer, and the fault of the high voltage bushing has certain Gradual and sudden. [0003] In order to detect the defects of high-voltage bushings in time during the operation of the main transformer and avoid the occurrence of bursting accidents of high-voltage bushings, it is necessary to add a set of online insulation monitoring devices for high-voltage bushings to continuously monitor them...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01R4/64H01B17/58
Inventor 李江
Owner GUANGDONG NUCLEAR POWER JOINT VENTURE
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