使用电器设备时,经常会碰到机壳带电的现象。所谓机壳带电,系指电器设备的金属外壳带有一定的电压。例如,用低压试电笔测量一些电视机、收音机的底板时,会闪闪发光,用手触及时,会有麻木的感觉;有的电子设备的金属外壳,也会使试电笔发光,用电压表测量,会有220伏的电压;还有的设 When using electrical equipment, often encounter the phenomenon of charged chassis. The so-called chassis charged, means the metal shell of electrical equipment with a certain voltage. For example, using a low-voltage test pencil to measure some television sets, radios floor, it will glitter, touched by hand, there will be numb feeling; some electronic equipment, metal case, will make the test pencil light, voltmeter measurements , There will be 220 volts of voltage; there are settings