Principle of Cable Fault Tester

At present, the cable fault tester based on impulse flashover method used by the majority of users of power cable fault tester can easily roughly measure the distance of fault point with rangefinder when solving low resistance fault and dead ground fault of low-voltage cable (the distance test of such fault point does not need high-voltage discharge equipment, but uses low-voltage pulse method), However, the method of lighting fire, discharging and listening to sound is still used to locate the fault point. At the same time, the Pathfinder and fixed-point instrument of this kind of instrument are separated, which makes it impossible to synchronize the fixed-point when finding the path, and the fixed-point often deviates from the path. Moreover, due to the limitations of the principle, it is difficult to find the accurate path of the cable when finding the cable path, It is generally between 1-2 meters wide. Starting from practicability, hn-a10 series cable fault locator just makes up for the above defects. It can test the fault point location, buried depth and path synchronization of cable. The indication of fault, path and buried depth of the instrument is very intuitive, without technical analysis and completely independent of the operator's experience. It makes the originally tedious fault test work become a relaxed and interesting thing. Therefore, if the majority of impulse lightning cable tester users have another ht-tc cable fault locator and the original distance finder, they can form a set of perfect low-voltage cable fault tester. At the same time, the low resistance and open circuit faults of high-voltage cables can also be quickly fixed, and the work efficiency can be improved several times. In fact, the majority of power consuming enterprises and units rarely contact the maintenance of high-voltage cables in daily production, because the maintenance right of high-voltage cables is generally specially maintained by the prefecture and municipal power departments. The number of low-voltage cables is far greater than that of high-voltage cables. For enterprises, factories and mining units, residential areas, scientific research institutes, more developed towns and villages, colleges and universities, some small and medium-sized cities and county-level power supply bureaus, the solution of low-voltage cable faults is what they are most concerned about. In fact, what low-voltage cable users need is a tool tester with simple operation, convenient carrying, strong practicability, low price and suitable for field operation. Because the insulation strength of low-voltage cable is low, if the method of ignition and discharge is used to test the fault of low-voltage cable, we find that this method sometimes causes secondary fault. More seriously, after ignition and discharge, the service life of the cable will be reduced and the fault incidence will be increased, which will seriously affect the normal power supply and production.

Principle of Cable Fault Tester 1

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