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High-voltage insulation structure, cable terminal, bus, high-voltage bushing, and transformer bushing

A high-voltage insulation and insulation sleeve technology, which is applied in the fields of cable terminals, busbars, high-voltage bushings and transformer bushings, can solve problems such as multi-equipment, insulation medium leakage, explosion, etc., so as to improve production and installation efficiency and ensure insulation Strength and the effect of reducing manufacturing cost

Active Publication Date: 2017-03-01
北京天威瑞恒高压套管有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is very troublesome to fill the insulating medium when installing the insulating bushing on site, not only to ensure a clean environment, but also to use more equipment and more complicated processes
Moreover, the insulating medium may cause leakage after operation. If the oil leaks, it may cause a fire. If the SF6 gas leaks after operation, it may also cause environmental pollution or personnel poisoning, or even cause an explosion, threatening personal safety and equipment safety.

Method used

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  • High-voltage insulation structure, cable terminal, bus, high-voltage bushing, and transformer bushing
  • High-voltage insulation structure, cable terminal, bus, high-voltage bushing, and transformer bushing
  • High-voltage insulation structure, cable terminal, bus, high-voltage bushing, and transformer bushing

Examples

Experimental program
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Effect test

Embodiment 1

[0024] Such as figure 1 As shown, a capacitive cable terminal not filled with an insulating medium of the present invention includes a conductive rod 1, a stress sleeve 2, a capacitive insulating sleeve 5 with an upper flange 3 and a grounding flange 4, and a capacitive insulating sleeve 5 is tightly crimped with the stress sleeve 2, and the high-voltage equipotential screen 6 embedded in the inner surface of the capacitive insulating sleeve 5 and extending from the upper flange 3 to the top surface of the stress sleeve 2 and the conductive core 7 of the cable form a high-voltage equipotential warehouse 8. The electric field strength in the warehouse is zero. In addition to the high-voltage equipotential screen 6, a group of capacitive screens 9 that are insulated from each other are embedded in the insulating layer of the capacitive insulating sleeve. The outermost grounding screen 10 and the lower flange are The grounding flange 4 is connected, and along the outer surface of...

Embodiment 2

[0029] see figure 2 , the transformer bushing not filled with insulating medium of the present invention includes a conductive rod 1', a stress sleeve 2', an insulating sleeve 5' with an upper flange 3' and a grounding flange 4' at both ends; The conductive rod insulation layer 7' is covered on it, and the insulating sleeve 5 surrounds the conductive rod 1 and the conductive rod insulating layer 7' for insulation protection, forming a closed insulating space between the insulating sleeve 5' and the conductive rod 1' ;The upper flange 3' fixes one end of the insulating sleeve 5' to the conductive rod 1', the stress sleeve 2' is set on the other end of the conductive rod 1' corresponding to the grounding flange, and the other end of the insulating sleeve 5' The grounding flange 4' of the upper flange 4' is connected to the grounding part of the stress sleeve 2', and the insulating sleeve 5' contains the stress sleeve 2' and is tightly crimped with each other, forming a closed s...

Embodiment 3

[0036] Specifically as image 3 As shown, an insulated bus bar according to the third embodiment of the present invention, the tubular conductor 1" of the insulated bus bar is provided with an insulating sleeve 5", and a closed insulating space is formed between the tubular conductor 1" and the insulating sleeve 5". A high-voltage equipotential screen 6" is inlaid on the inner surface of the sleeve 5", and the tubular conductor 1" is electrically connected to the high-voltage equipotential screen 6", forming a gap between the high-voltage equipotential screen 6" and the insulating layer 7" without filling the insulating medium. The high-voltage equipotential chamber is 8", and the insulating layer of the insulating sleeve 5" is also embedded with a plurality of mutually insulated capacitive screens 9", and the outermost capacitive screen is used as a grounding screen 10" to connect to the grounding terminal 4'. Multiple capacitors The axial dimension of the screen 9' is shorte...

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Abstract

The invention discloses a high-voltage insulation structure, a cable terminal, bus, a high-voltage bushing, and a transformer bushing. The high-voltage insulation structure comprises an insulating bushing, and the insulating bushing sleeves a conductor. A closed insulating space is formed between the insulating bushing and the conductor, and the internal surface of the insulating bushing is provided with a high-voltage equipotential screen in an inset manner. The conductor is electrically connected with the high-voltage equipotential screen, and a high-voltage equipotential cabin without an insulating medium is formed between the high-voltage equipotential screen and the conductor. The high-voltage equipotential cabin enables a gap between the conductor and the insulating bushing not to be provided with the insulating medium. The structure greatly reduces the weight of a product under the conditions of guaranteeing the insulating intensity and the reliability of partial discharge quantity indexes and the performances, reduces the manufacturing cost, and improves the production and installation efficiency. The cable terminal, the bus, the high-voltage bushing and the transformer bushing are respectively provided with the above high-voltage insulation structure.

Description

technical field [0001] The invention relates to the field of high-voltage electrical appliances, and relates to an insulating structure of a medium-high voltage electrical connection device, in particular to a cable terminal, a bus bar, a high-voltage bushing and a transformer bushing adopting a high-voltage insulating structure. Background technique [0002] As we all know, in the outdoor, indoor, and GIS parts of the power system, in order to make the medium and high voltage circuits pass through obstacles (such as walls, floors, switchgear cabinets, transformers and circuit breaker housings, etc.), or to maintain A medium-high-voltage electrical connection device that needs to be used for the insulation of high-voltage circuits from grounded objects, such as transformer bushings, wall bushings, cable terminals, and insulating busbars. The medium and high voltage electrical connection device of the present invention refers to the general term of these transformer bushings,...

Claims

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Application Information

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IPC IPC(8): H01B17/58H01B17/42
Inventor 王欢王海珍
Owner 北京天威瑞恒高压套管有限公司
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