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 Tester Manufacturer
Do you know what is a cable fault detection waveform? Cable fault detection waveform analysis, the ideal cable fault detection waveform is similar to the cable waveform measured by the low voltage pulse method. The starting point (inflection point) of the waveform varies widely, and the waveform is horizontal. However, after knowing what a cable fault detection waveform is, the ideal cable fault detection waveform is similar to the cable waveform measured by the low voltage pulse method.
The starting point (inflection point) of the waveform varies widely, and the waveform is horizontal. However, in a practical application of the flash method, the waveform will vary with cable fault type, stress level, capacitance, measurement circuit composition and wave attenuation. Direct flash waveform.
In practical work, the flashover cable fault is measured by the direct flashover method, that is, the DC high voltage flashover method. During the test, the instrument gradually raises the fault point through the DC high voltage circuit. When the applied voltage rises to a certain value, the fault point is broken down, and a sudden voltage is generated, and a voltage wave of opposite polarity is generated.
to propagate along the cable to the test end, thereby reflecting back and forth between the test points. Test terminal and fault point until loss decreases, flashing waveform. Almost any faulty cable can be measured by the flicker method (i.e. shock high voltage flashover method), but the waveform varies greatly depending on the pressure level, the size of the capacitor, the method of taking the wave, the nature.
and the location of the cable fault. Currently, the inductive flickering method is commonly used, which can make the fault point and discharge at a relatively low voltage, and the waveform is easy to read. The measured normal fault waveform, the special cable fault analysis can observe the waveform using the energy storage oscilloscope, which is very intuitive, and can clearly show whether the fault point is broken down, which is conducive to analysis and judgment.
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