End shield current sampling device suitable for insulated online monitoring system of high-voltage capacitor bushing

A monitoring system, a technology for high-voltage capacitors, used in measuring devices, measuring current/voltage, measuring electrical variables, etc.

Inactive Publication Date: 2011-04-27
杨丽琳
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be seen that the grounding reliability of the conventional end-screen current sampling device is much lower than that of the metal cover of the bushing manufacturer

Method used

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  • End shield current sampling device suitable for insulated online monitoring system of high-voltage capacitor bushing
  • End shield current sampling device suitable for insulated online monitoring system of high-voltage capacitor bushing
  • End shield current sampling device suitable for insulated online monitoring system of high-voltage capacitor bushing

Examples

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Embodiment Construction

[0016] Such as image 3 As shown, the current transformer 7 is first installed in the metal casing 3 of the current transformer, and the secondary terminal is led out from the lead hole 8 and sealed, and sealing materials such as epoxy resin and rubber can be used. The bottom end of the metal rod 11 is threaded, and the metal rod 11 can be fixed by the insulating fixing plate 9 and the positioning bolt 10 . During on-site installation, first install the copper spring clip 5 on the end screen 2, and remove the positioning bolt 10 before rotating the metal casing 3, so that the copper spring clip 5, the metal lead wire 6, and the metal rod 11 will not follow along with each other. Rotate with the rotation of the metal shell 3, install the positioning bolt 10 after the metal shell 3 is fastened, to fix the metal rod 11. Finally install the metal cover 4.

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PUM

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Abstract

The invention relates to an end shield current sampling device suitable for an insulated online monitoring system of a high-voltage capacitor bushing and aims to solve the problem of low grounding reliability of the conventional sampling device. The sampling device comprises a spring clamp 5, a metal lead wire 6, a metal rod 11, a current transformer 7, a metal shell 3 of the current transformer 7, a metal cover 4 and a spring clamp 12, wherein in the grounding route of an end shield, an end shield 2, the metal spring clamp 5, the metal lead wire 6, the metal rod 11, the metal spring clamp 12, the metal cover 4, the metal shell 3 of the current transformer 7 and an end shield shell 1 are connected in turn; and in the entire route, spring pressure welding, tin soldering and threaded connection modes are adopted and contact is reliable. The entire device has small size, short grounding route and high end shield grounding reliability.

Description

technical field [0001] The invention relates to an on-line monitoring system for the insulation of a high-voltage capacitor bushing, in particular to an end-screen current sampling device of the system. Background technique [0002] With the development of on-line monitoring technology for power equipment insulation, the on-line monitoring system for capacitor bushing insulation is widely used in high-voltage power equipment. The monitoring system needs to sample the current of the bushing end shield, and the poor grounding of the bushing end shield will cause the bushing to explode. Therefore, the grounding reliability of the sampling device determines the reliability and promotion prospects of the bushing insulation on-line monitoring system. [0003] Bushing manufacturers use metal covers for grounding, such as figure 1 As shown, the end screen 2 is connected to the metal cover 4 through the metal spring clip 12, and the metal cover 4 is connected to the end screen shel...

Claims

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Application Information

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IPC IPC(8): G01R19/00G01R31/12
Inventor 杨丽琳
Owner 杨丽琳
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