Centralized high-voltage cable sheath protection box

A high-voltage cable and protection box technology, applied in the direction of measuring electricity, measuring electrical variables, measuring current/voltage, etc., can solve problems such as burning of cable lines, difficult protective layer protectors, personal safety threats to operation and maintenance personnel, etc.

Pending Publication Date: 2021-07-30
CHINA RAILWAY SIYUAN SURVEY & DESIGN GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This inspection method is difficult to find the fault of the sheath protector in time; if the faulty sheath protector cannot be found and replaced in time, the cable line

Method used

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  • Centralized high-voltage cable sheath protection box
  • Centralized high-voltage cable sheath protection box
  • Centralized high-voltage cable sheath protection box

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Embodiment Construction

[0024] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application.

[0025] In the following introduction, the terms "first" and "second" are only used for the purpose of description, and should not be understood as indicating or implying relative importance. The following description provides multiple embodiments of the present invention, and different embodiments can be replaced or combined in combination, so the present invention can also be considered to include all possible combinations of the same and / or different embodiments described. Thus, if one embodiment contains features A, B, C, and another embodiment contains features B, D, then the invention should also be considered to include all other possible combinations containing one or more of A, B, C, D Although this embodiment may not be clearly written in the following content.

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Abstract

The invention discloses a centralized high-voltage cable sheath protection box, which comprises a box body, a sheath protector, a current sensor, a state display device, a temperature and humidity controller, a heater, a data acquisition and processing unit, a clock module, a power supply module and a monitoring host. The sheath protector is used for overvoltage protection of a metal shielding layer and an armor layer of the high-voltage cable; the total current of the sheath protector under continuous operation voltage is composed of capacitive current and resistive current, and the sheath protector is used for judging the state of equipment by monitoring whether the resistive current is increased or not under normal operation voltage. The problem of property loss or personal safety caused by the fact that the fault of the sheath protector is not found in time through manual inspection in the prior art is solved, and the safety and stability of the railway traction power supply system are improved.

Description

technical field [0001] The present application relates to the technical field of railway traction power supply systems, in particular to a centralized high-voltage cable sheath protection box. Background technique [0002] At present, when the high-voltage cable sheath in the railway traction power supply system adopts single-ended grounding, the metal shielding layer and armored layer of the non-grounded end are usually grounded through the sheath protector to achieve overvoltage protection. The installation of the sheath protector mainly adopts a decentralized arrangement, and there are various installation methods, such as installation at the bottom of the switch cabinet, installation brackets along the wall in the cable interlayer or installation brackets on the cable brackets, etc. [0003] Sheath protectors generally use zinc oxide varistors or zinc oxide valves as protective components. During long-term operation, the insulation performance is gradually reduced due to...

Claims

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Application Information

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IPC IPC(8): G01R19/00G01R31/00G01D21/02
CPCG01R19/00G01R31/00G01D21/02
Inventor 李进军黄维吕文利高黎明王林张雷汪自成黄军
Owner CHINA RAILWAY SIYUAN SURVEY & DESIGN GRP
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