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
Question: DC high voltage flashover test method Answer: DC high voltage flashover test method (referred to as direct flash method) is used to measure flashover breakdown faults, that is, the resistance at the fault point is extremely high, and high voltage test equipment is used to raise the voltage to a certain value When a flashover breakdown occurs. Question: DC high voltage flashover test method Answer: DC high voltage flashover test method (referred to as direct flash method) is used to measure flashover breakdown faults, that is, the resistance at the fault point is extremely high, and high voltage test equipment is used to raise the voltage to a certain value When a flashover breakdown occurs. According to statistics, the cable faults that can be measured by the direct flash method account for about 20% of the total number of cable faults, and most of the cable faults in the preventive test belong to this type of fault.
The waveform obtained by the direct flash method is simple and easy to understand. However, after several flashover discharges at some fault points, the resistance of the fault point often decreases, so that the direct flash method can no longer be tested. Therefore, the opportunity to perform the direct flash test should be cherished in actual work.
Copyright © 2022 SHENZHEN NOYAFA ELECTRONIC CO.,LIMITED - www.noyafa.net All Rights Reserved.