How much is the normal value of insulation resistance of electric hammer
Dielectric strength is tested by a withstand voltage tester, which clamps the path with one end of the chuck, clamps the ground wire with the other clamp, sets the time and voltage, and tests it. The above operation shall follow the essentials of safety operation, especially the dielectric strength test, and there is a certain risk.
Insulation resistance is measured by an insulated resistance meter, usually with 1 or 0.5 orders of accuracy, which is the most common. When measuring with chuck head. Another pathway, chuck clamp wire, rotate the handle by hand, turn to 60 per minute to 100 RPM speed, see pointer where the read value is the measured value of insulation resistance.
These indicators are required for personal safety. Standard value should be determined according to the standard environment. Generally, in normal temperature and humidity, it is necessary to withstand 1000V and last 1 minutes without breakdown. This dielectric strength is the minimum requirement stipulated by the national standard. As for insulation resistance, there are no definite rules, and generally can reach several megabytes.
