The Method of Detecting Leakage Current of Indoor Hidden Lines with Clamp Ammeter
1. The clamp ammeter is a special tool for measuring AC current. Measuring current with a clamp ammeter cannot accurately distinguish electricity stealing behavior, because there are many and complicated means of stealing electricity.
2. Just take the case of "bypassing" the meter (such as changing the transformer ※※) to steal electricity as an example. There is no abnormality in the three-phase current, but the measurement data is low, which cannot be measured by using a clamp ammeter. A comprehensive approach will work.
3. The same is true for single-phase power supply lines, such as smart prepaid meters. Criminals can slow down the meter by changing the meter (the original standard *※), but it cannot be measured by clamp meters alone.
4. It is also very difficult to measure the leakage with a clamp meter, because the leakage current is very small (if the current is large, it is not a leakage, but a short circuit), and the measurement data has no reference.
The method of judging the user's internal circuit and equipment leakage by using a clamp ammeter
Use a clamp ammeter to measure the leakage current at the user's power inlet line, and at the same time put the user's electrical equipment and lamps into and out one by one, and check the leakage current changes by watching the clamp ammeter to find the leakage equipment and lamps .
If all the equipment and lamps are good, or the equipment with leakage has been withdrawn, but the clamp ammeter shows that the user still has leakage current, it may be that the low-voltage line of the user has leakage, and it should be dealt with according to the specific situation . For the leakage fault of the pre-buried and concealed pipeline, only the treatment method of changing the line or rewiring can be adopted. Home of Electrotechnical Technology
