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 Manufacturer
Why does the cable fault tester fail? A cable fault tester is a cable fault detection instrument. It can test cable high impedance flashover fault, high and low resistance grounding, short circuit and cable breakage, poor contact and other faults. Why do cable fault testers fail if equipped with reasonable laws? A cable fault tester is a cable fault detection instrument.
It can test cable high impedance flashover fault, high and low resistance grounding, short circuit and cable breakage, poor contact and other faults. If equipped with a reasonable legal point, the location of the point of failure can be pinpointed. It is especially suitable for testing power and communication cables of various types and voltages.
Cable fault testers can test cables from long distances, but when a faulty cable causes it, do you know what caused it? 1. The cable is wet. Because the structure of the junction box or the junction box is not sealed or poorly installed, the water inlet or the cable is poorly manufactured, the metal sheath has small holes or cracks, and the metal sheath can be pierced or corroded by foreign objects; 2. The cable insulation is lost. When laying the oil-impregnated paper insulated cable, the unevenness of the groove is not uniform, or the outdoor pressure head on the rod is not as good as the insulating oil due to the difference between the corrugation, height and low voltage, so the insulation performance of the cable is reduced at higher places .
cause failure; 3. The cable is mechanically damaged. Damage during installation, accidental damage to the cable during installation, excessive mechanical traction, over-tightening of the cable, excessive bending of the cable, damage to the cable or direct damage to the cable, the cable structure in the cable path or the cable near the cable is directly externally damaged Or the vibration or shock load of the moving vehicle may cause the lead seal of the underground cable to break; or it may be caused by natural phenomena; 4. The cable fault tester is poorly designed and manufactured, and the material is defective. The waterproofing and electric field distribution of the intermediate joint and terminal head are not well designed.
According to regulations, improper material selection, poor workmanship and manufacturing failure can lead to cable head failure.
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