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
Question: Analysis of the cause of the cable failure of the cable fault tester Answer: The cable fault tester can test the cable accurately and remotely, but when the cable fault of the cable fault tester fails, you know what caused the problem : Analysis of the cause of the cable failure of the cable fault tester Answer: The cable fault tester can test the cable accurately and remotely, but when the cable fault of the cable fault tester fails, do you know what caused it? ? How to repair it? Let me introduce to you today. 1. The cable is damp. Water ingress or poor cable manufacturing due to unsealed structure or poor installation of junction box or terminal box, small holes or cracks in the metal sheath, or the metal sheath may be punctured by foreign objects or perforated by corrosion; 2. Insulation of cables material loss.
When the oil-impregnated paper insulated cable is laid, the trenches are uneven, or the outdoor head on the pole, due to the undulations and the great difference in height, the insulating oil at the high place flows to the lower place, which reduces the insulation performance of the cable at the high place, resulting in failure; 3 , Cable mechanical damage. Damage during installation, accidentally bump the cable during installation, pull the cable due to excessive mechanical traction, or damage the cable due to excessive bending of the cable or damage it directly by external force. The cable is damaged by direct external force or the vibration or impact load of the driving vehicle will cause the lead package of the underground cable to crack; there may also be damage caused by natural phenomena; 4. Poor design and manufacturing process and material defects. Insufficient design of waterproof and electric field distribution of intermediate joints and terminal heads, improper selection of materials, poor workmanship, and non-compliance with regulations will cause cable head failure.
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