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Protective measure for replacing beeline pole side-phase post insulator in 20kV circuit in charged state

A pillar insulator, live replacement technology, used in overhead lines/cable equipment, insulators, circuits, etc., can solve the problems of small three-phase wire space distance, electric shock accidents, and dense facilities, and achieve good protection effects.

Inactive Publication Date: 2010-06-09
STATE GRID ELECTRIC POWER RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the space distance between the three-phase conductors of the 20kV line is small, and the facilities are dense. It is easy to touch the power facilities of different potentials within the range of human activities, which will cause electric shock accidents. Therefore, the current should be mainly protected

Method used

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Experimental program
Comparison scheme
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Embodiment Construction

[0023] The protective measures for replacing the side-phase post insulators of the straight poles with power on the 20kV line of the present invention will be described in detail below in conjunction with the embodiments.

[0024] The operation process of replacing the side-phase post insulators of the straight poles with power on the 20kV line is as follows:

[0025] (1) The staff first wear one of the insulating clothing, insulating shawl or insulating sleeve on the ground, as well as a complete set of insulating protective equipment such as insulating pants, insulating gloves, insulating shoes (boots) and insulating caps; The withstand voltage level is 30-40kV / 1-3min withstanding power frequency voltage, and 40-50kV power frequency breakdown voltage.

[0026] (2) The staff carry tools and take the insulated load-carrying arm car to enter the vicinity of the insulators of the side phase pillars of the straight pole that need to be replaced; the withstand voltage level of the...

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Abstract

The invention relates to a protective measure for replacing a beeline pole side-phase post insulator in a 20kV circuit in a charged state. When the beeline pole side-phase post insulator in the 20kV circuit is replaced in a charged state, the protective measures comprise the following working steps of: adopting the protective measures of a full set of insulation protection tools, an aerial lift device with an insulated bearing arm, an insulated shielding tool, and the like; shielding wires, the post insulator and a cross arm in sequence by the insulated shielding tool; detaching the insulated shielding tool of the post insulator that needs to be replaced; then replacing the post insulator, recovering the shielding to the post insulator after the replacement is finished; and finally detaching the insulated shielding tool according to the sequence of the cross arm, the post insulator and the wires. The invention ensures the safety of workers.

Description

technical field [0001] The invention relates to a protective measure for replacing a post insulator, in particular to a protective measure for replacing a straight pole side-phase post insulator while a 20kV line is live, and belongs to the technical field of live work. Background technique [0002] 20kV distribution lines belong to a new voltage level in my country, and have the characteristics of larger transmission capacity than 10kV distribution lines. In recent years, they have gradually begun to be used in some areas with developed economies and large demand for electricity in my country. The 20kV line belongs to the distribution line, and it also has the characteristics of many equipment, low insulation level, and directly facing the user. It is prone to failure under the influence of atmospheric overvoltage, pollution or other external factors. Once the 20kV line fails, it will directly affect the user's safety. production and life. [0003] The function of the insu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02G1/02H01B17/00
Inventor 胡毅王力农刘凯徐莹郑传广刘庭胡建勋肖宾
Owner STATE GRID ELECTRIC POWER RES INST