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–Noyafa Cable Tester
Which cable identification instrument is good? What are the test methods of the cable identification instrument? Cable Identifier (also known as Live Cable Identifier) is designed for power cable engineers and cable workers to solve cable identification technical problems. What are the test methods of which good cable identifiers can be used by the user from multiple cable identifiers through the instrument? The cable identification instrument (also known as the live cable identification instrument) is designed for power cable engineers and cable workers to solve the technical problems of cable identification. Users can accurately identify one of the target cables from multiple cables through the instrument, avoiding serious accidents caused by mistakenly pulling live cables.
Cable identification begins with manipulation of both ends of the cable. The two numbers on both ends of the cable must be correct. This product is only suitable for field identification of cut cables.
It is strictly forbidden to connect cable identification to running power cables. The instrument consists of transmitter, receiver, flexible current clamp and so on. Cable identification method: 1.
The so-called sound measurement method is to find out the sound according to the discharge condition of the faulty cable. The invention is effective for the flashover discharge of the insulating layer through the high-voltage cable core wire. The equipment used in this method is a DC withstand voltage testing machine.
It must be safe to use this method. The end of the test equipment and the end of the cable shall be monitored by a special person. 2.
The bridge method is to measure the DC resistance of the cable core with a double-arm bridge, and then accurately measure the actual length of the cable, and calculate the fault point according to the proportionality between the cable length and the resistance. The advantage of this method is that the cable core wire is directly short-circuited or the contact resistance fault of the short-circuit point is less than 1Ω, the judgment error is generally not greater than 3m, and the contact resistance of the fault point is greater than 1Ω. Reduce the resistance to 1 by increasing the voltage burnout methodΩBelow, and further measure according to this method.
3. In the operation of the cable using the capacitive current measurement method, there is capacitance between the cable core and the core and between the core and the ground. The capacitance is distributed evenly and the capacitance is linearly related to the length of the cable.
Based on this principle, the capacitive current measurement method is very accurate for the measurement of the broken core fault of the cable. 4. Zero potential method, that is, potential comparison method.
This method is suitable for short cable core ground faults. It is simple to measure and does not require sophisticated instruments and complex calculations. Which cable identification instrument is a good cable identification instrument and what are the test methods? Shenzhen Noyafa Electronic Technology Co., Ltd.
Copyright © 2022 SHENZHEN NOYAFA ELECTRONIC CO.,LIMITED - www.noyafa.net All Rights Reserved.