The detection of partial discharge detector is relatively fast, has strong anti-interference ability, and is also very convenient to carry. It can be used in many occasions and can also be used in conjunction with a variety of equipment. When using it, follow The regulations are in progress, and today I will give you a detailed introduction to the method of measuring the switch cabinet by the partial discharge detector.

1. Ultrasonic detection method. Since the partial discharge phenomenon has diversified characteristics, when it discharges, it will have electromagnetic wave signals and sound waves will also appear, so that the energy of partial discharge will be transmitted to the surrounding in the form of sound waves. At this time, the acoustic pulse can be detected by the partial discharge detector, and it can also reflect the situation of the partial discharge. When discharging inside the switchgear, sound waves will be generated. Its frequency spectrum is very wide, and some of it can be heard by everyone’s ears, and the sound waves above this frequency need to rely on partial discharge detectors. Come to receive.

2. Detection method of ground wave. When the part of the switchgear insulated to the ground is partially released, there will be some capacitive discharge electricity between the high-voltage dotted conductor metal shells. This electricity is very small and lasts for a long time. It is relatively short, and the discharge point is also inside the switchgear, so the voltage pulse generated by the electromagnetic wave will propagate on the inner surface of the metal shell, and it will be shielded by its shell. If the shielding layer is continuous Otherwise, the discharge signal cannot be detected externally. In fact, the shielding layer is still discontinuous in some parts, because these parts may be damaged. When it is not continuous, it will be detected by the partial discharge detector.

It can be seen that when using a partial discharge detector to measure switch cabinets, there are usually two methods, one is the ultrasonic detection method, and the other is the ground wave detection method. Their working principles are actually relatively simple. Everyone is operating At the time, just follow the instructions in the instructions.