Check for stolen or leaking electricity with a clamp-on ammeter
Clamp ammeter is a practical electrician's tool for measuring low-voltage lines*, high precision and good stability performance are its main features. Power staff can be used to detect low-voltage current, micro-current and check the equipment leakage, test the main line whether power theft. This article introduces the clamp-on ammeter to check power theft leakage detection
Check line internal and equipment with or without power leakage
In the main line with a clamp-on ammeter to measure the leakage current, and then the power equipment will be closed in turn, each closed with a clamp-on ammeter to detect changes in the line leakage current to find the leakage equipment. If all the electrical equipment has been closed, but the clamp-on ammeter shows that there is still leakage current, should be the existence of low-voltage line leakage, should be re-routed or leakage detection points
Determine which phase is leaking
In the distribution transformer, disconnect the neutral line on the contactor side of the low-voltage line, take out the fuse and install it in one of the phase lines, and use the clamp-on ammeter to measure the phase, and the measured current is the leakage current of the phase. Test other phase line leakage current in turn
Judge the location of the leakage
In the case of low-voltage line energisation, single-phase line and neutral line should be placed in the jaws of the clamp-on ammeter at the same time during the test, and the three-phase three-phase line and the neutral line should be placed in the jaws at the same time. If there is no leakage fault, then the load current flux of the phase and zero, clamp ammeter indication is also zero; such as leakage current, clamp ammeter can detect leakage current to.
