high-resistance
Key words:
The circuit fault tester is equipped with an industrial-grade 10.1-inch touchscreen all-in-one computer and features a simple operation software interface to achieve human-machine interactive testing. It utilizes industrial-grade integrated circuits and components, with a built-in high-capacity lithium-ion battery, ensuring stable reliability and convenient use. This circuit fault tester is a specialized instrument for measuring and analyzing the status and fault distance of power cables. By integrating modern electronic technology with computer technology, it realizes functions such as signal filtering, acquisition, data processing, graphical display, and graphical analysis to complete tests including cable velocity measurement, cable length testing, and cable fault distance measurement. This device is applicable to various power cables (of different cross-sections and dielectric materials), high-frequency coaxial cables, street lamp cables, and underground wires. It can test low-resistance, short-circuit, open-circuit, and broken-wire faults, as well as high-resistance leakage faults and high-resistance flashover faults. Its technical parameters comply with the requirements of the following standards: GB/T 18268.1 Requirements for the Interference Immunity of Test Equipment for Industrial Premises, DL/T 849.1-2019 General Technical Conditions for Specialized Testers for Electrical Equipment Part 1: Cable Fault Flash Detectors, and JJF 1042-2020 Calibration Specification for Circuit Fault Testers.
The cable fault location device uses the principles of vibration sound pickup and electromagnetic induction to accurately locate the cable fault point. The high-voltage pulse generator triggers flashover discharge at the fault point, and the generated vibration waves, sound waves and electromagnetic waves are picked up by a special probe, amplified and processed by the instrument, and output through audio-visual signals, ultimately achieving accurate positioning of the fault point within the rough measurement range directly above the cable. The device is suitable for power cables, high-frequency coaxial cables, street light cables and underground wires of different cross-sections and media. It can detect low-resistance, short-circuit, open-circuit and broken wire faults, as well as high-resistance leakage and high-resistance flashover faults. The technical parameters meet the "DL∕T 849.2 General Technical Conditions for Special Testers for Power Equipment Part 2: Cable Fault Location Device" standard.
The cable fault location instrument locates the fault point based on the principle of vibration pickup and electromagnetic induction: the high-voltage pulse triggers the flashover of the fault point, and the vibration/sound wave/electromagnetic wave generated is picked up by a special probe, amplified and processed by the instrument, and displayed. The tester completes the precise positioning within the rough measurement range directly above the cable through audio-visual judgment. It is suitable for low-resistance, short-circuit, open-circuit and high-resistance leakage and high-resistance flashover faults of power cables, high-frequency coaxial cables, street light cables, and underground wires with different cross-sections/media. The technical parameters meet the anti-interference requirements of GB/T 18268.1 and the acoustic and magnetic location standard of DL/T 849.2-2019.
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