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Modularization vacuum switch

A vacuum switch, modular technology, applied in electrical switches, high-voltage/high-current switches, high-voltage air circuit breakers, etc., can solve the problem of re-ignition of the disconnected capacitor bank, and achieve the solution of re-ignition, long electrical life, and reduced production. cost effect

Inactive Publication Date: 2016-11-09
ZHENJIANG SHISHENG ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] By connecting equalizing capacitors in parallel in the arc extinguishing chamber, the purpose of making the partial pressure of the two vacuum interrupting chambers uniform can be achieved, solving the problem of re-ignition of the breaking capacitor bank, and greatly improving the safety of the vacuum switch

Method used

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Examples

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Embodiment 1

[0027] figure 1 is a sectional view of Embodiment 1 of the present invention, figure 2 It is a partially enlarged view of the current transformer module part of Embodiment 1 of the present invention, image 3 It is a schematic diagram of the disconnected state of Embodiment 1 of the present invention, Figure 4 It is a perspective view of a three-phase switch composed of a plurality of vacuum switches of Embodiment 1. In the figure, the meanings of each reference mark are as follows: 1. Top terminal; 2. Interrupter; 3. Voltage equalizing capacitor; 4. Insulating shell; 5. Flexible connection piece; Current transformer module; 8. Intermediate conductor; 9. Operating mechanism; 10. Switch base; 11. Insulation pull rod.

[0028] A modular vacuum switch, comprising two insulating shells 4, the outer of the insulating shell 4 is provided with sheds, the interior of the insulating shell 4 is provided with an arc extinguishing chamber 2, and the static end of the arc extinguishin...

Embodiment 2

[0038] Figure 5 It is a perspective view of a three-phase switch composed of a plurality of vacuum switches of Embodiment 2. In the figure, the reference signs that have appeared in the drawings used in Embodiment 1 still follow the definition of the reference signs in the above-mentioned embodiment.

[0039] The difference between this embodiment and Embodiment 1 is that the current transformer module provided on the intermediate conductor in Embodiment 1 is canceled in this embodiment.

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Abstract

The invention relates to a modularization vacuum switch which includes two insulating housings. The inside of each insulating housing is provided with an arc extinguish chamber. A static end of the arc extinguish chamber is provided with a top terminal, and a dynamic end of the arc extinguish chamber is connected to a flexible connecting sheet. The flexible connecting sheets inside the two insulating housings of each modularization vacuum switch are both in connection to an intermediate conductor. Each insulating housing and the corresponding arc extinguish chamber is provided with an equalizing capacitor therebetween, and the equalizing capacitor is in parallel connection to the arc extinguish chamber. The arc extinguish chambers are in parallel connection to the equalizing capacitors, such that the two vacuum arc extinguish chambers are equally pressure-divided, and the problem of on-off r-ignition of a capacitor bank, and the safety of a vacuum switch is substantially increased. The switch main body has long electrical service life, high reliability, and the modularization structure facilitates functional expansion and lowers production cost.

Description

technical field [0001] The invention belongs to the technical field of high-voltage or high-current switches with arc-extinguishing or arc-proof devices, and in particular relates to a modular vacuum switch. Background technique [0002] Vacuum interrupters are widely used in switchgear with a voltage level of 72.5kV and below because of their long service life, low maintenance and no pollution. There will be a large inrush current when the vacuum switch is connected to the capacitor bank, and there will be overvoltage or even re-ignition when the capacitor and reactor are cut, resulting in serious accidents. In power system substations, the switching of large-capacity capacitor banks and reactors has become a hidden danger affecting the stable operation of the power system. Contents of the invention [0003] The invention provides a modular vacuum switch for overcoming the technical problems in the prior art, and the modular vacuum switch improves the safety of use. [...

Claims

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Application Information

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IPC IPC(8): H01H33/66H01H33/662
CPCH01H33/6606H01H33/662
Inventor 金钊张宇星李猷民段建军
Owner ZHENJIANG SHISHENG ELECTRIC CO LTD
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