Category:power

Question:
AC220V light as a signal, why not give the signal (AC220V) has always been a non-bright light like? Dim the light. I think it is electric induction, but were followed zero line, the nearest ground wire, are unable to destroy. Is there any good way?

Answer:
light years filled with inert gas. Not connected to the circuit when there will be capacitive current flows. Inert gas is highly excited luminescence.

Such as regular See the electric neon bulb inside the pen. When you hold it under high-voltage lines, it will light.
electronic test pencil. as long as close to the firing line, it will light. You can also explain the presence of capacitive currents.

this LED indicator light is used to indicate the strength of the circuit state. not based on the availability of light to indicate circuit status.

Answer:
you are using a gas emitting the signal can there be such a phenomenon, if the signal on the zero line removed, or such a situation, that is, in itself signal the lights to sit leakage.

Answer:
for only like a light-emitting diode indicator.

Answer:
switch in series with the indicator is not a good insulator

Chinese:指示灯为什么似亮非亮？

类别: 电力

问题:
AC220V指示灯作为信号灯，为什么在没有给信号（AC220V)的情况一直似亮非亮？朦朦胧胧的亮。我认为是感应电，但是再接零线，就近接地线，都灭不了。请问有什么好办法?

回答:
指示灯里充有惰性气体.电路没接通时也会有容性电流流过.惰性气体是极易激发发光的.

比如常见的电笔内的氖灯泡.当你在高压线下拿着它时,它就会发光.
电子式测电笔.只要靠近火线,就会发光.也可以说明容性电流的存在.

这种指示灯只是用发光强弱来指示电路状态的.并不是根据发光有无来指示电路状态.

回答:
您使用的是气体发光的信号灯才会有这种现象,如果把信号灯上的零线去掉,还是这种情况,那就是信号灯的灯坐本身漏电.

回答:
换只发光二极管的指示灯就好了.

回答:
与指示灯相串联的开关绝缘不太好