电气技师论文（Electrical engineer thesis）.doc

电气技师论文（Electrical engineer thesis） This paper is contributed by insect pest Doc documents may have a poor browsing experience at the WAP end. It is recommended that you choose TXT, or download the source file to the native view. Power cable fault analysis and detection method Persons involved: Power supply department of industrial head office, June 2010 Power cable fault analysis and detection method Power cable fault analysis and detection method Abstract: the power cable (hereinafter referred to as the cable) is buried in the ground, and it is very difficult to find it when it breaks down It will take hours, even days, to waste not only a lot of manpower and material resources, but also an immeasurable loss of power. How to accurately, quickly and economically search the cable failure has become the goal of the tester. Key words: cable fault insulation diagnosis, ranging, fixed point method Cable fault point in time, quickly find is to guarantee smooth power supply and ensure the reliability of the power supply of necessary means, but due to the concealment of the cable line, imperfect cable running data, and test equipment and the limitation of the detection level, make the cable fault is very difficult to find. Based on years of experience and reference, this paper summarizes the common fault and analysis of cables and the selection and application of the method. 1. Reasons for cable failure 1. A large proportion of cable failures caused by mechanical damage caused by mechanical damage. Some mechanical damage was mild, but it did not break down at the time, but it did not develop until several months or even years later. The main causes of cable mechanical damage are: 1.1.1 damage to the installation: accidentally touching the cable in the installation, the mechanical drawing force is too large and the cable is pulled, or the cable is overbent and the cable is damaged. 1.1.2 direct external forces damage 1.1.3 damage caused by natural phenomena: if land subsiden