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Middle- and high-voltage electrical switch disconnector

A high-voltage isolating switch, isolating switch technology, applied in high-voltage air circuit breakers, high-voltage/high-current switches, electrical switches, etc., can solve the problems of poor current disconnection performance and large current disconnection chambers

Active Publication Date: 2013-11-20
AREVA T&D
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Above 800A (and especially a value of 1250A) the cost of such a breaker is greater than that of other disconnector breakers
[0010] The current breaking chamber working in air is very large and its current breaking performance is better than being able to utilize SF 6 The current cut-off chambers obtained by the equipment are even worse

Method used

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  • Middle- and high-voltage electrical switch disconnector
  • Middle- and high-voltage electrical switch disconnector
  • Middle- and high-voltage electrical switch disconnector

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0040] refer to figure 1 , which primarily shows an insulating housing 14 with two fixed switching contacts 1 diametrically opposite each other on the housing wall and a movement mounted inside the housing for pivotal movement about an axis concentric with the housing 14 Switch contact 2. The moving contact 2 is rod-shaped, and its length is slightly smaller than the inner diameter of the insulating shell 14. The end 21 of the moving switch contact can be in contact with the end 17 of the contact 1 extending into the insulating shell 14.

[0041] The current input is represented by a first arrow 12 and applied to a first stationary contact 1 , while the output is represented by a second arrow 13 output from another stationary contact 1 diametrically opposite the first contact 1 .

[0042] According to the invention, the first element is made of polyoxymethylene (POM), preferably in the form of a homopolymer, and consists of a POM ring 11 placed around the end 17 of each fixed...

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Abstract

The disconnector has a tubular fixed contact (1), and a rotary movable contact (2) movable along a determined direction for assuring passage and interruption of electric current in respective current passage and interruption positions. One of fixed and movable contacts is established successively in a determined direction of displacement of the contact (2), a fixed polyoxymethylene homopolymer washer (11) and a protection band (15) i.e. fixed plate, that is made of PTFE, so that a new electric arc is initially confronted to the washer and to the band, during interruption of the current.

Description

technical field [0001] The invention relates to the field of medium-voltage and high-voltage power distribution, and in particular to switchgear consisting of disconnector circuit breakers for use in medium-voltage transmission lines. Background technique [0002] Currently, there are various disconnector circuit breakers on the market. They differ from each other in the way they break the current. [0003] The first isolating switch circuit breaker in sulfur hexafluoride (SF 6 ) where the interruption and breaking of the current flow occurs mostly simultaneously by mechanically separating the moving switch contacts from each other over a distance large enough to ensure breaking. Typically, the compartments in which these circuit breakers are installed have a small width, for example 375 millimeters (mm) wide for 24 kilovolts (kV). [0004] Another technique is to disconnect the current outdoors. Again, the interrupting and breaking functions of the current are simultane...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01H33/04H01H33/22
CPCH01H9/302
Inventor 丹尼尔·皮克科兹布鲁诺·科林迪迪埃·托马斯帕特里克·卡萨尔泰利克莱尔·克雷翁
Owner AREVA T&D