Secondary cable identification method and device based on asymmetric phase signals
A technology of secondary cables and phase signals, applied in the directions of measuring devices, frequency measuring devices, measuring electricity, etc., can solve the problems of missing drawings, increased difficulty in checking, accidents, etc., and achieves convenient and fast wire tracing, saving personnel and time. , the effect of improving work efficiency
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[0041] The technical solution of the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0042] like figure 1 Shown, the present invention comprises the following steps:
[0043] Step 1: Add a side current transformer to the cable to be found, and generate an induced current on the cable to be found by applying the side current transformer, which is not equal to the frequency of the power frequency and the harmonic frequency of the power frequency, and make the current in the cycle positive and negative phase waveforms asymmetrical;
[0044] This technical solution adopts the law of electromagnetic induction, which is also called Faraday's law of electromagnetic induction. The phenomenon of electromagnetic induction refers to the phenomenon of induced electromotive force due to the change of magnetic flux. For example, when a part of the conductor of the closed circuit cuts the magnetic induction line in the magnetic fi...
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