NOYAFA Electronic specializing in testing instruments and cable testers for 16 years
Language
NOYAFA Electronic specializing in testing instruments and cable testers for 16 years
Author: Noyafa–CCTV Tester
What are the applications of high-voltage flashover measurement? High-resistance faults of power cables (high-resistance faults: faults where the DC resistance of the fault point is greater than the characteristic impedance of the cable are high-resistance faults) almost account for more than 90% of the total fault rate. What is the scope of application of high pressure flashover measurement before burn-through treatment? High-resistance faults of power cables (high-resistance faults: faults where the DC resistance of the fault point is greater than the characteristic impedance of the cable are high-resistance faults) almost account for more than 90% of the total fault rate. without“burn through”Before the treatment, most of the faults are not suitable for testing by the low-voltage pulse method or the bridge method, which often brings many difficulties to the on-site electrical engineering technicians in troubleshooting.
Although some high-resistance faults utilize AC or DC“burn through”The equipment can make the fault point heat and carbonize due to the passing of the current, so that the resistance value becomes lower, which is suitable for low-voltage pulse or bridge measurement. However, a lot of practice has proved that not all high-resistance faults can be used“burn through”Method of firing low-resistance failure. Some connectors fail to burn for a long time without wearing them, and some resistances even burn higher and higher.
In order to solve such a problem, the high-voltage flashover measurement method must be adopted.
Copyright © 2022 SHENZHEN NOYAFA ELECTRONIC CO.,LIMITED - www.noyafa.net All Rights Reserved.