Summary:
Cable Fault Locator is a device used to detect and identify faults in power lines. It can accurately determine the location and type of faults by measuring parameters such as current, voltage, and resistance in the cable. This article will introduce the basic principle and working mode of the live cable identification device.
Working principle:
The live cable identification instrument mainly adopts two measurement methods, namely current method and voltage method. The current method refers to determining the fault location by measuring the current in the cable, while the voltage method determines the fault location by measuring the voltage change at the cable terminal. Both of these methods can be performed in a charged state, greatly improving the efficiency of detection.
The principle of the current method is based on Ohm's law, which states that current is inversely proportional to resistance. When a cable malfunctions, the resistance value of the cable will change, and the current will also change accordingly. By measuring the current values before and after the fault, the change in cable resistance can be calculated to determine the location of the fault.
The principle of voltage method is based on the variation of voltage at both ends of the cable. When a cable malfunctions, the voltage at both ends of the cable will change, and this change can be measured. By measuring the voltage values before and after the fault, the impedance of the damaged part of the cable can be calculated to determine the location of the fault.
Working mode:
The working mode of the live cable identification device mainly consists of three steps: signal injection, signal reception, and signal processing. Below, we will provide a detailed introduction to the specific operations of these three steps.
Signal injection:
Firstly, it is necessary to connect a generator and a receiver at both ends of the cable. The generator will inject a certain signal current or voltage, while the receiver will receive the signal current or voltage and return it to the live cable identification device.
Signal reception:
Next, it is necessary to scan and detect information such as signal strength and frequency changes on the cable. This process requires the use of special probes and measuring instruments. By observing changes in the signal, the fault point in the cable can be identified, and the type and location of the fault can be determined.
Signal processing:
Finally, it is necessary to process and analyze the received signal. This process requires specialized software and algorithms that can accurately locate fault points and output reports based on signal characteristics and frequency analysis results.
Conclusion
The live cable identification device is a reliable and efficient detection device that can accurately detect and identify cable faults through the measurement methods of current and voltage, and provide detailed fault reports. In power production and maintenance, live cable identification devices will play an increasingly important role.
ZC-701E power on cable identifier, also known as cable identifier, multi-functional cable identifier and intelligent cable identifier, is designed for power cable engineers and cable workers to solve the technical problems of cable identification. The user can accurately identify one of the target cables from multiple cables through the instrument, so as to avoid serious accidents caused by missawing off live cables. Cable identification starts from the operation of both ends of the cable. It must ensure that the double numbers of both ends of the cable are correct. The instrument design adopts PSK technology and precise algorithm. The product also has the functions of live cable identification, power-off cable identification, AC current test and AC voltage test. It is composed of transmitter, transmitting current clamp, receiver, receiving flexible current clamp, etc. during the identification of live cable, 10 cables can be pre calibrated(sampling) at the transmitting side, and then received at the far end(other side) for identification, which greatly saves the engineering personnel's round-trip operation time and improves the work efficiency.
Kvtester Electronics Technology Co.,Ltd. is a high-tech enterprise specializing in power testing, testing, research and development, production, and sales of testing equipment. It has been engaged in the electrical testing industry for many years, and its products are of high quality. We welcome customers to come and purchase. Service hotline: 0086-27-81778799, to learn more, visit the official website: www.kvtester.com
