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
Shenzhen cable fault detection can be effectively detected by the sound measurement method The so-called sound measurement method is to search according to the sound of the faulty cable discharge. This method is more effective for the flashover discharge of the high-voltage cable core wire to the insulation layer. The equipment used in this method is the DC withstand voltage test. Shenzhen cable fault detection can be effectively detected by the acoustic measurement method. The so-called acoustic measurement method is to search according to the sound of the faulty cable discharge. This method is more effective for the flashover discharge of the high-voltage cable core wire to the insulation layer. The equipment used in this method is a DC withstand voltage tester.
The circuit wiring is shown in Figure 1, where SYB is the high-voltage test transformer, C is the high-voltage capacitor, ZL is the high-voltage rectifier silicon stack, R is the current limiting resistor, Q is the discharge ball gap, and L is the cable core wire. When the capacitor C is charged to a certain voltage value, the ball gap discharges the faulty core wire of the cable, and the cable core wire discharges to the insulation layer at the fault.“nourish, nourish”The sound of spark discharge can be directly searched by hearing for the laying cable. If it is a buried cable, first determine and indicate the direction of the cable. Find. When searching, keep the pickup close to the ground and move slowly along the cable“nourish, nourish”When the discharge sound is the largest, this is the fault point.
Be sure to pay attention to safety when using this method, and special personnel should be set up to monitor the end of the test equipment and the end of the cable.
Copyright © 2022 SHENZHEN NOYAFA ELECTRONIC CO.,LIMITED - www.noyafa.net All Rights Reserved.