Ground Fault

Ground fault. It can also be checked from the transformer, and then grounded to the distribution box. The grounded should be grounded, and the normal phase line should be excluded from the grounding fault. It can be measured with an insulation meter or a shaker when the power is cut off. For segmented measurement, try to measure only the power supply and distribution lines such as cables, wires, circuit breakers, switches, etc., if it is difficult to segment the NA, unplug the fuse of the weak current equipment and the sensing device.

The key to grounding is that the grounding resistance should be low and the contact area should be large. The former can ensure that the grounding point has a zero potential as low as possible close to the ground potential. This can prevent the lightning from the grounding line after lightning strikes. "Reverse string" back to the possibility of entering the power supply circuit. The latter can ensure that there is enough capacity to provide a fault current channel, including lightning or short-circuit faults, etc. Because the actual construction process has always been based on contemporary technology and technology in theory. Changes and changes, so whether this grounding method works, whether it is good or not, depends on how the new standard specifications are stipulated.