NOYAFA Electronic specializing in testing instruments and cable testers for 16 years
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NOYAFA Electronic specializing in testing instruments and cable testers for 16 years
Author: Noyafa–Cable Length Tester
Cable fault test Cable fault test steps Cable fault test The detection of cable fault generally goes through four processes: diagnosis, distance measurement, route detection and fixed point. 1. Diagnosis Diagnosis of the nature of the cable fault, that is, to confirm the type and severity of the fault, so that the testers can prescribe the right medicine and choose the appropriate cable fault location and fixed point method. Use a megohmmeter and a multimeter to measure the fault resistance to confirm whether the cable fault is high resistance or low resistance; flashover or closed fault; grounding, short circuit, disconnection, or a combination of them; single-phase, two-phase , is still a three-phase fault.
2. Ranging Cable fault locating, also known as rough measurement, uses an instrument at one end of the cable to confirm the fault distance. The commonly used fault locating methods in the field include the classical bridge method and the modern traveling wave method. 3. L012 cable path identification instrument produced by our company is used to find the way. 4. The legal point of fault fixed-point acousto-magnetic synchronization: use the electromagnetic signal of discharge for synchronization, digitally sample the sound signal, and display the sound waveform at the moment of discharge on the LCD screen , the waveform can continue to persist for the operator to distinguish carefully, avoiding the shortcoming of the transient sound, and the actual discharge waveform is obviously different from the surrounding noise. More importantly, the sound waveform of repeated discharges is extremely similar. When the sound waveform of the discharge is the same, it can be clearly determined that the discharge sound has been collected. Since the response range of the acoustic measurement method is generally very small, when the discharge sound is heard, it is very close to the fault point, generally it will not exceed 5m, even within 1-2m. Cable fault test steps Cable fault test Shenzhen Noyafa Electronic Technology Co., Ltd. company.
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