Portable insulation detector is really a good invention. It has compact structure and convenient operation. When you need to move, one person is enough, and the space occupied is relatively economical. More importantly, the test results are particularly accurate and the results are fast. It is really a good product. The work efficiency is also quite high. The device consists of a signal source host and a small current detection clamp meter, which can detect the grounding point of DC feed cable. The host generates a signal source and injects the low-frequency AC signal of 10V 15Hz into the DC positive and negative buses. When a feeder branch is grounded, there should be leakage current flowing through the feeder cable of the branch from the starting point of DC screen to the grounding point, and there should be no leakage current from the grounding point of the cable to the terminal of the load. The floor drain current is detected by a clamp meter, and measured section by section along the feeder cable from the starting point of DC screen to the end point of load. The position where the current starts to be zero is the grounding point. Functional features can quickly and accurately detect the grounding point of DC feed circuit branch cable. The wiring is simple, which is simpler for the system using microcomputer grounding instrument of Altun Company. It can adapt to two DC voltage levels of 220V and 1 10V, and has a wide detection range. The instrument is used independently and does not need to rely on any other equipment. When measuring the floor drain current, the clamp meter has no direction.
Insulation withstand voltage tester is also called electrical insulation strength tester or dielectric strength tester. A test of applying a specified AC or DC high voltage between the live part and the non-live part (usually the shell) of an electrical appliance to check the withstand voltage of the insulating material of the electrical appliance. In long-term operation, electrical appliances not only have to bear the specified working voltage, but also bear the short-term overvoltage caused by operation (the overvoltage value may be several times the rated working voltage value). Under the action of these voltages, the internal structure of electrical insulation materials will change. When the overvoltage intensity reaches a certain value, the insulation of materials will be broken down, electrical appliances will not work normally, and operators may get an electric shock, endangering personal safety.