The advantage of installing fault recorder is that it is very convenient to read some basic information through the analysis and processing of fault recorder analysis software. The key information of the corresponding fault can be obtained from the automatically generated fault report, including: fault time, protection action, fault phase and type, fault current, fault location, reclosing action and so on. In this way, the fault situation can be accurately judged faster, which is conducive to the next step of accident treatment.

According to the fault recording graph, we can roughly judge what fault is, which is convenient for faster processing. After summary, the analysis points of single-phase grounding fault recording graph are obtained

When one phase current increases, one phase voltage decreases, and zero sequence current and zero sequence voltage appear.

When the current increases, the voltage decreases to the same phase.

The phase of zero sequence current is the same as that of fault phase current, and the phase of zero sequence voltage is opposite to that of fault phase voltage.

The fault phase voltage is about 80 degrees ahead of the fault phase current, and the zero sequence current is about 110 degrees ahead of the zero sequence voltage.

When there is a fault in the system, we mainly analyze the situation according to the key information of the fault recording graph, and the above are the key points of single-phase grounding fault. We can confirm whether there is a single-phase grounding fault according to these key information. This is only the graphic analysis of single-phase grounding fault. If you want to know more analysis methods, you can continue to pay attention to them, and they will be updated from time to time later.