Mob/Whatsapp/Wechat: +86-15123029636           E-mail: gold03@hy-industry.com
You are here: Home » FAQ » Cable Faults
 Add: 9F, Jintai Building, Nanping, Nan’an District, Chongqing, China
 Manager: Ms. Ivy Zhang
 Mobile: +86 15823877847
 Fax: +86-23-62940030
 Email:master@hy-industry.com Skype:ivyzhangzy@hoymail.com

Cable Faults

Views:4     Author:Alisa Chen     Publish Time: 2017-11-02      Origin:Site


Example of a cable fault:

Cable faults are damage to cables which effect a resistance in the cable. If allowed to persist, this can lead to a voltage breakdown. There are different 

types of cable faults, which must first be classified before they can be located. The insulation of the cable plays a significant role in this. While paper-

impregnated cables are particularly susceptible to external chemical and thermal influences, in high-voltage PE or XLPE cables the polyethylene 

insulation of the conductor is affected, leading to partial breakdowns and cracks that “eat away” the insulation.

03_副本.jpg

Screening faults:

A contact between conductor and screen generates a varying resistance.

Phase faults:
The contact between multiple conductors generates a varying resistance.

Sheath faults:

Sheath faults are damage of the cable sheath that allows the surroundings contact with the cable screen.


Faults due to moisture


Water penetrates into the cable sheath and contacts the conductors. Impedance changes at the fault location make measuring more difficult. The 


resistance usually lies in the low-ohmic range.


Disruptions

Combination of series and parallel resistances, usually in the form of a wire break. The voltage is interrupted, i.e. Ω=∞ .

09_副本.jpg


Cable testing:

To locate a fault in the cable, the cable must first be tested for faults. Cable testing is therefore usually performed first in cable fault location. During the 

cable test, flash-overs are generated at the weak points in the cable, which can then be localised


Gold Mechanical & Electrical Equipment

We're here to offer you professional, fast, comprehensive and high-quality services.
Our marketing network covers all countries worldwide and thus can provide high-quality pre-sale, in-sale and after-sale services for customers as soon as possible. 

Products

Quick Links

​Copyright © Chongqing Gold Mechanical&Electrical Equipment Co.,Ltd.  All Rights Reserved. Site Map  Supported by Leadong.com