The detection of cable faults generally takes four steps: diagnosis, ranging, path finding, and pointing.
1. Diagnose the nature of the cable fault diagnosis, that is to determine the type and severity of the fault, so that the tester can prescribe the right medicine, select the appropriate cable fault location and fixed-point method.
Measure fault resistance with megohmmeter and multimeter to determine whether the cable fault is high or low impedance; whether it is flashover or closed fault; whether it is grounded, shorted, broken, or their mixture; whether it is single-phase, two-phase, or three-phase. Failure.
2. Ranging cable fault distance measurement, also called coarse measurement, uses the instrument to determine the fault distance at one end of the cable. The commonly used fault location methods on the site are the classical bridge method and the modern traveling wave method. Using Cable Fault Range Finder or Cable Fault Range Finder 3. Path Finding Cable Path Identifyer or CD-12/22 Cable Path Identifyer 4. Fault Fixed-Point Acoustic-Magnetic SynchroStats: Using Cable Fault Pointer, Using Discharged Electromagnetic The signal is synchronized and the sound signal is sampled digitally. The waveform of the sound at the moment of discharge is displayed on the LCD screen. The waveform can be continuously maintained for the operator to distinguish carefully, avoiding the shortcomings of the fleeting sound, and the actual discharge waveform and ambient noise. There are obvious differences, more importantly, the sound waveforms of multiple discharges are extremely similar. When the sound waveforms of multiple discharges are observed to be the same, it can be clearly determined that the discharge sound has been collected. Since the response range of acoustic measurement is generally very small, when the sound of discharge is heard, it is very close to the point of failure, generally it will not exceed 5m, even within 1-2m.
1. Diagnose the nature of the cable fault diagnosis, that is to determine the type and severity of the fault, so that the tester can prescribe the right medicine, select the appropriate cable fault location and fixed-point method.
Measure fault resistance with megohmmeter and multimeter to determine whether the cable fault is high or low impedance; whether it is flashover or closed fault; whether it is grounded, shorted, broken, or their mixture; whether it is single-phase, two-phase, or three-phase. Failure.
2. Ranging cable fault distance measurement, also called coarse measurement, uses the instrument to determine the fault distance at one end of the cable. The commonly used fault location methods on the site are the classical bridge method and the modern traveling wave method. Using Cable Fault Range Finder or Cable Fault Range Finder 3. Path Finding Cable Path Identifyer or CD-12/22 Cable Path Identifyer 4. Fault Fixed-Point Acoustic-Magnetic SynchroStats: Using Cable Fault Pointer, Using Discharged Electromagnetic The signal is synchronized and the sound signal is sampled digitally. The waveform of the sound at the moment of discharge is displayed on the LCD screen. The waveform can be continuously maintained for the operator to distinguish carefully, avoiding the shortcomings of the fleeting sound, and the actual discharge waveform and ambient noise. There are obvious differences, more importantly, the sound waveforms of multiple discharges are extremely similar. When the sound waveforms of multiple discharges are observed to be the same, it can be clearly determined that the discharge sound has been collected. Since the response range of acoustic measurement is generally very small, when the sound of discharge is heard, it is very close to the point of failure, generally it will not exceed 5m, even within 1-2m.
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