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 locator price Multi-function cable fault precise locator principle Cable fault locator price malfunction, etc. The maximum test range can reach 20 kilometers, the operation is simple, and the fixed point is accurate. It is the most commonly used testing equipment to find cable faults. The principle of the multi-function cable fault precise location instrument is as follows: The signal transmission method unties all the grounding of the zero line and the ground line of the low-voltage cable, and the direct output of the transmitter is connected between the fault phase and the ground.
The signal flows from the transmitter through the faulty phase, at the ground fault point, to the ground, and back to the transmitter. The fixed-point method is similar to the broken-line fault fixed-point method. Keep the receiver perpendicular to the cable and use the peak value method. Start from the near end of the transmitter and gradually move to the far end for detection. The signal is strong before the fault point, and the signal is weakened after the fault point.
The point where the signal starts to weaken is the fault point location. The signal has no pitch change before and after the fault point. The induction method uses the inductive method to locate the fault, and there is a precondition - the size of the fault resistance.
The smaller the fault resistance is, the better it is to find the fault point, and it is not suitable for this method if it is too large. Low-frequency detection method The lower the low frequency, the more obvious the change of the cable fault point, and the easier it is to identify. Step voltage method For phase-to-ground faults, the step voltage method is the most suitable.
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