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Voltage check device for gas insulation apparatus

A technology of gas-insulated equipment and voltage detection, applied in the direction of measuring devices, switchgears, switchgear settings, etc., can solve problems such as overvoltage insulation, damage, and voltage increase, so as to avoid insulation damage, prevent overvoltage, reduce The effect of sharing the voltage

Inactive Publication Date: 2010-01-13
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Although the above-mentioned existing voltage detection device for gas-insulated equipment has taken corresponding suppression measures for the closed circuit including the second capacitor 10 and the photovoltage sensor 12, when the high-frequency surge voltage is applied to the bus 2, the intermediate electrode 3 The voltage shared by the low-voltage side becomes larger, and sometimes overvoltages are generated on various parts in the voltage detection device until the insulation is damaged

Method used

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  • Voltage check device for gas insulation apparatus
  • Voltage check device for gas insulation apparatus
  • Voltage check device for gas insulation apparatus

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Embodiment approach 2

[0061] In addition, in the above-mentioned first embodiment, the annular insulating layer 15 as the insulating supporting member is arranged in contact with the outer circumference of the intermediate electrode 3, but it may be as follows: Figure 9 , Figure 10 As shown, a supporting member for supporting the intermediate electrode 3 on the inner surface of the grounded metal container 1 is constituted. Figure 9 and Figure 10 It is a side cross-sectional view and a cross-sectional view showing the structure of a support member that supports the intermediate electrode 3 on the inner surface of the grounded metal container 1 according to Embodiment 2 of the present invention. In addition, the structure other than the support member shown in a drawing is the same as that of Embodiment 1 mentioned above.

[0062] Such as Figure 9 , Figure 10 As shown, the container-side annular support conductor 26a as the first annular support conductor, and the intermediate electrode-si...

Embodiment approach 3

[0067] Figure 11 It is a partial cross-sectional view showing the configuration of the voltage detection device of the gas insulated equipment according to the third embodiment, Figure 11 (a) represents a side sectional view, Figure 11 (b) means Figure 11 Cross-sectional view of line XI(b)-XI(b) in (a).

[0068] in addition, Figure 11 For the convenience of expression, only the low-voltage side of the intermediate electrode 3 is shown, and the illustration inside the outer box 11 is omitted, but the omitted parts are all related to figure 1 The above-mentioned Embodiment 1 shown above is the same.

[0069] As shown in the figure, the intermediate electrode 3 is supported on the inner surface of the grounded metal container 1 by an insulating support member 5 . The insulating support member 5 here is the same support as a conventional member. The connecting conductor 6 for extracting voltage is installed on the intermediate electrode 3, and the connecting conductor 6 ...

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Abstract

This invention posts a voltage detection device which can reduce the voltage shares ratio of the lower voltage of middle electrode in the voltage detection of air isolation device and prevent the overvoltage in order to avoid isolation attaint. The device is applied to the earth metal container 1 and the first capacitor which is composed with the middle electrode 3 coaxially cylindrical disposed, formed with the electrode which has specific distance with the generatrix 2, and the earth metal container 1 and the second capacitor 10 applied to voltage detection. By throwing the partial voltage between the mentioned first and second capacitor to the sensor 12 you can detect the voltage of generatrix 2. Further more, the ring sustained conductor 31 is placed in the outside circle of the middle electrode 3 by the dint of ring insulation 5 and in the inner surface of the earth metal container 1 by the sustained conductor joining component 31a, so it can falls the voltage between middle electrode 3 and earth metal container 1 and reduce the voltage shares ratio.

Description

technical field [0001] The present invention relates to a voltage detection device for gas-insulated equipment, and in particular to countermeasures against impulse voltage. Background technique [0002] Existing voltage detection devices for gas-insulated equipment are as follows. Figure 15 It is a cross-sectional view showing the configuration of a conventional voltage detection device. [0003] Such as Figure 15 As shown, a grounded metal container 1 as a conductive container having a conductive member constitutes a cylindrical casing of a gas insulated device such as a gas insulated switch. A bus bar 2 serving as a high-voltage conductor is arranged coaxially inside the grounded metal container 1 . The cylindrical intermediate electrode 3 and the grounded metal container 1 are arranged coaxially between the grounded metal container 1 and the bus bar 2, and are installed so as to be electrically insulated from the grounded metal container 1 and the bus bar 2, respectiv...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R15/06G01R19/00
CPCH02B13/0356
Inventor 宫下信井波洁堀之内雄作羽马洋之伊东启太石垣一三伊藤文雄
Owner MITSUBISHI ELECTRIC CORP
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