NOYAFA Electronic specializing in testing instruments and cable testers for 16 years
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NOYAFA Electronic specializing in testing instruments and cable testers for 16 years
Author: Noyafa–Cable Tester Suppliers
Cables are often used to distribute electrical energy. Although cables are highly developed, sometimes cable systems fail. Power companies are often faced with the problem of locating the exact location of a fault in a distribution cable.
These failures often occur at the worst times and cause the greatest inconvenience to utility customers, who must quickly locate and isolate failures that restore power service. Available fault location methods use fault locators, hammers, radar, acoustic detectors or a combination of these. Cable fault locators are used to pinpoint faults in cables for quick repairs.
To reduce downtime and facilitate maintenance, cable fault locators are essential, they use the principle of pulse reflection technology to quickly locate the point of failure because they are very flexible and save time. Considering the growth of urban construction, subway, etc., the demand for the product is bound to increase. A faulty cable can damage the cable, affecting the resistance of the cable.
If allowed to persist, voltage breakdown may result. Equipment users must use the most efficient and effective method of targeting underground cable faults and require minimal training to use cable fault locating equipment. Manufacturers must design equipment with simple operating features to pinpoint cable faults quickly and accurately, thereby minimizing any external damage to the cable under test.
There are different types of cable faults and they must be classified first. To find a fault in a cable, you must first test the cable for a fault. Therefore, cable testing is usually performed first at the cable fault location.
During cable testing, flashovers are created at weak points in the cable, which can then be located. The actions required to determine the location of the fault can be broken down into individual steps. Fault Classification Insulation and resistance measurements provide information on fault characteristics.
The insulation test measures the insulation resistance between the conductor and the screen; by periodically measuring the resistance, the absorption properties of the insulating material can be derived. Cable identification In cable identification, faulty cables can be identified by means of fault-free cables that have been identified on site. After the cable fault is identified and located, the burner unit can be used to burn in the cable, in other words, convert it from a low resistance fault to a high impedance fault.
To meet the need for gentler methods of fault location, the industry has developed more sophisticated methods to reduce the stress on aging insulation systems. The general approach is to reduce the amount of thump required to locate the fault, while reducing the voltage required to perform the task.
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