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Cable fault tester how to judge high voltage and low voltage
The cable fault tester is used to test power failures. So how does it test high voltage and low pressure? What are the specific steps? Xiaobian Xiaobian to introduce everyone.
1, first determine whether the cable fault is high resistance or low resistance or grounding, according to this condition using different test methods. The secondary or tertiary pulse can be used to measure the fault distance. Compared with the traditional test method, the secondary and tertiary impulse method is advanced in that the complex waveform in the impact high-voltage flashover method is simplified to the simplest low-voltage pulse short circuit. Fault waveforms, so the interpretation is extremely simple, accurate fault distance calibration.
2. To find the path, add a signal to the cable, and then use the receiver to receive this signal. Walk along the path of the signal to determine the path of the cable.
3, according to the measured distance to accurately locate. When you heard the loudest sound from the headset of the spot meter, you found the location of the point of failure.