众所周知,只要凭借测电笔,观察其氖泡是否发亮,即可得知被测物体是否带电。多年来,小小的测电笔已成为人们安全操作的必备用品。然而,若问被测物体带电电压的数值,或者隔着低压线路的绝缘层判断哪条是零线,哪一条是相线,精确测出导线中的断点位置。仅凭这支测电笔就无能为力了 As we all know, as long as by virtue of measuring pen, observe whether its neon bulb is lit, you can get the measured object is charged. Over the years, a small test pencil has become an essential part of the safe operation of people. However, if the value of the charged voltage of the object to be measured or the insulation of the low-voltage line is used to determine which one is the zero line and which one is the phase line, the position of the breakpoint in the wire is accurately detected. Only this measuring pencil can do nothing