Dual-gas chamber direct-current voltage divider

A technology of DC voltage divider and double air chamber, applied in the direction of voltage divider, etc., can solve problems such as the trouble of inspection personnel, and achieve the effect of improving the accuracy.

Active Publication Date: 2017-05-17
STATE GRID CORP OF CHINA +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the actual testing process, it is often found that there is a certain error between the equipment voltage calculated by the testing equipment and the actual equipment voltage. The existence of this error has caused great trouble to the testing personnel. How to eliminate this error has always been a problem.

Method used

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  • Dual-gas chamber direct-current voltage divider

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Embodiment Construction

[0017] In order to better describe the DC voltage divider of the present invention, the working principle of the existing DC voltage divider will be described below first.

[0018] Through long-term research and a large number of tests on the existing DC voltage divider, it is found that there are stains on the outside of the high-voltage arm housing and the stains contain a lot of water, or in rainy weather, or when the moisture in the outside atmosphere condenses In the case of exposure, etc., the insulating section of the high-voltage arm housing cannot play a good insulating role. Such as figure 1 As shown, the outside of the voltage divider, specifically the surface of the insulating material from V1 to B, will generate a parasitic resistance Rj in parallel with the high-voltage arm, and Rj will be incorporated into the high-voltage arm 2 of the voltage divider through point B, and the transformation ratio of the DC voltage divider On the becomes This will directly a...

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PUM

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Abstract

The present invention provides a dual-gas chamber direct-current voltage divider. The dual-gas chamber direct-current voltage divider comprises a high-voltage arm and a low-voltage arm connected in series through intermediate connecting conductors; the high-voltage arm is mounted in a cylindrical high-voltage arm housing having an insulating section; the upper end of the high-voltage arm is led out from the upper side of the insulating section; the intermediate connecting conductors extend out from the lower side of the insulating section; the lower end of the high-voltage arm housing is connected with a low-voltage arm housing which is used for sealing the low-voltage arm so as to isolate the low-voltage arm from the outside environment; two ends of the low-voltage arm are connected with voltage detecting conductors; the voltage detecting conductors extend out from the low-voltage arm housing; the intermediate connecting conductors are in insulating fit with the high-voltage arm housing and the low-voltage arm housing; and the voltage detecting conductors are in insulating fit the low-voltage arm housing. With the direct-current voltage divider of the invention adopted generation of parasitic resistance in parallel connection with the high-voltage arm can be avoided, and the accuracy of detection can be improved.

Description

technical field [0001] The invention relates to a double air chamber DC voltage divider. Background technique [0002] The DC voltage divider is mainly a resistance-capacitance DC voltage divider, which mainly includes a high-voltage arm and a low-voltage arm connected in series. The end of the high-voltage arm far away from the low-voltage arm is connected to the equipment, and the end of the low-voltage arm far away from the high-voltage arm is grounded. Through the high-voltage arm and The low-voltage arm divides the voltage of the equipment, and then detects the voltage on the low-voltage arm through the detection equipment, which can calculate the voltage of the equipment, reduces the requirements for the detection equipment, and makes the detection process safer. [0003] The high-voltage arm of the traditional DC voltage divider is installed in the cylindrical high-voltage arm shell, and the wires go out through the upper and lower ends of the cylindrical high-voltage...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R15/04
CPCG01R15/04
Inventor 田志国薛潇敏袁亮张贺步梦琼魏少鹏丁建超
Owner STATE GRID CORP OF CHINA
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