An induced voltage absorbing device and method thereof

A technology of induced voltage and absorption device, which is applied in the electrical field, can solve the problems of personal injury, equipment injury, high induced voltage, etc., and achieve the effect of simple operation and safe and convenient characteristic measurement process

Active Publication Date: 2018-09-28
CET AE POWER SHANDONG HIGH VOLTAGE SWITCHGEAR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the lines on both sides are live, if the grounding short-circuit board of the grounding switch is removed, there will be a high induced voltage here, and direct measurement will cause great harm to people and equipment

Method used

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  • An induced voltage absorbing device and method thereof
  • An induced voltage absorbing device and method thereof
  • An induced voltage absorbing device and method thereof

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Embodiment Construction

[0028] In order to better understand the technical solution of the present invention, the present invention will be further described below in conjunction with the accompanying drawings.

[0029] like figure 1 As shown, when repairing the circuit breaker, it is necessary to close the grounding switch on both sides of the circuit breaker, and at least one end of the grounding switch’s grounding short-circuit plate (the grounding switch can only be grounded through the grounding short-circuit plate, and removing the grounding short-circuit plate means that the grounding switch Floating instead of grounding, so there is a high induced voltage there) removed to get the on-off logic signal on both sides of the breaker.

[0030] figure 2 It is the specific connection diagram of the grounding switch and GIS. Because the wire carries high voltage, and the shell is a metal shell, and there is a gap between the wire and the grounding switch, there is a gap capacitance between the wir...

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PUM

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Abstract

The invention provides an induced voltage absorption device and a method thereof. The device comprises a shell and an induced voltage absorption circuit which is arranged in the internal part of the shell. The shell is a cuboid hollow sealed shell. The upper surface of the shell is provided with a high-voltage conductive wire connecting terminal Main, a switching feature instrument connecting terminal Osc and a grounding terminal E. The induced voltage absorption circuit is connected between the switching feature instrument connecting terminal Osc and the grounding terminal E. Both of the high-voltage conductive wire connecting terminal Main and the switching feature instrument connecting terminal Osc are a three-phase connecting terminal. The circuit structure of the induced voltage absorption circuit is that the switching feature instrument connecting terminal Osc is connected with the grounding terminal E through a three-phase switch SW and a resistor R1 in turn. Each phase of the connecting terminal of the switching feature instrument connecting terminal Osc is connected with the grounding terminal through a low-voltage capacitor. The capacitance value of the low-voltage capacitor is not less than 0.045 microfarad, and the low-voltage capacitance values on the three phases are equal. Induced voltage of a short circuit plate can be absorbed so that personal and equipment safety can be guaranteed.

Description

technical field [0001] The invention relates to the electrical field, in particular to an induced voltage absorbing device and a method thereof. Background technique [0002] Gas-insulated and enclosed metal switchgear (GIS for short) consists of circuit breakers, disconnectors, grounding switches, busbars, voltage transformers, current transformers and control and auxiliary circuits. Features, currently 550kV and below voltage level products are widely used, 1100kV GIS also has two lines that have been put into operation, and two lines are under construction. [0003] According to different substations, there are many wiring methods, among which, GIS of 550kV and above is generally 3 / 2 wiring method (that is, there are three circuit breakers for two lines, which is called a string, and the middle circuit breaker is shared by the two lines), and a string A typical wiring method such as figure 1 , where CB is a circuit breaker, DS is a disconnector, ES is an earthing switch...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02H9/04
Inventor 张霞天吕振舰张敬三李琴
Owner CET AE POWER SHANDONG HIGH VOLTAGE SWITCHGEAR
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