5 Minutes to know troubleshoot methods for photovoltaic cables

Everyone should know that there will inevitably be safety failures in the use of solar photovoltaic cables . From an objective point of view, the cost of cables is not low. If the cable is replaced directly, the cost is relatively high. So when a cable fails, the first solution is to fix the point of failure, so how do we find the point of failure before it is repaired? Below, Jianzhenda Cable will introduce you to three methods of locating cable faults. Let's take a look together.

After the photovoltaic cable fails, the general troubleshooting steps are as follows:

1. Determine the nature of the fault of the photovoltaic cable

According to the phenomenon when the solar fault occurs and some simple tests, the nature of the fault can be preliminarily judged. Whether the conductor resistance of the faulty photovoltaic cable is high or low, the line must be checked first, and the flashover or closed fault should be tested. Open circuit, or a mixture of them, single-phase, two-phase or three-phase photovoltaic cable failure. For example, when a photovoltaic cable in use fails, if there is still a ground signal, it may be a single-phase ground fault; if the relay protection overcurrent trips, it may be a two-phase or three-phase short circuit, or a short circuit and a ground fault. To judge whether the fault nature of the photovoltaic cable can be quickly determined, it is necessary to measure its insulation resistance and conduct a continuity test.

2. Check the wiring of photovoltaic cables

For incomplete drawings or unknown photovoltaic cable paths, the audio induction detection method and the pulsed magnetic field method can be used to find out the laying path and buried depth of the faulty photovoltaic cables, and perform precise measurements at fixed points. The audio induction detection method is to pass the audio signal current through the wire. The path is determined based on the strength of the audio signal received by the receiver in the receive coil.

3. Accurate fault point measurement point

The precise position of the fault point of the photovoltaic solar cable is determined by the pulse discharge acoustic measurement method, the audio frequency induction method and the acousto-magnetic synchronous detection method. The induction method is suitable for metal ground faults and phase-to-phase short-circuit faults.

All in all, if there are different faults in the use of photovoltaic cables, you can use the above steps to gradually check. This method is very simple. If it is more complicated, you can hire a more professional electrician. Inspection and repair.

Well, the above is the introduction of " 5 minutes to know the troubleshooting methods for photovoltaic cables ", I hope it can help everyone! It is recommended to continue to pay attention to JZD Cable to learn more about photovoltaic cable information.