スイッチ コントロール the ライブ ワイヤー to test the ニュートラル ワイヤー with a test pen, what's the matter?
First of all, it should be clear that no matter かどうか the live wire (the technical term is the phase wire) is disconnected or not, the neutral wire will not be charged under normal situation. if the neutral line is charged, it means that there is a problem somewhere in the line, so how to find out where the problem is? For 普通 顧客 who use 電気, share a シンプル および 実用的 クイック 検索 および 処理 メソッド:
1. For the description of this problem, because the zero line is slittlely bright, the reason for this phenomenon is generally the 酸化 phenomenon at the lap joint of the zero line, resulting in poor contact, but this situation can be ruled out as the disconnection of the zero line of the main line , because the zero line of the main line is disconnected or the contact is poor, 障害 現象 および 結果 原因 ある 異なる, SO 私たち 意志 しない 分析 それ ここ。
2. Search by section and narrow down the scope. First, check whether the neutral line of the upper and lower pile heads of the switch is normal when the main switch is in the closing position. If the neutral line is normal and there is no power, it is generally a problem in the rear section of the switch. You can check the connectors on the line section by section. After finding the fault point, re-wire and bandage it. Because the problem is usually in the line connection. This kind of situation occurs the most, and it is usually an old power line from a long time ago. Now the indoor wiring and installation are very scientific, and generally this kind of problem will not occur.
3. if when checking the switch on and off the pile, there is no power on the zero line at the top of the pile, but there is power on the bottom of the pile. in this case, the switch is generally broken. you can open and close the switch several times. 時々 the power can be be restore temporarily, but it should be replace the switch in time.
If the neutral line on the switch is also charged while the inspection, you can only call for repairs in this case, because there may be inspections by climbing poles, and the user can'can' easy solve it.
There are two possibilities. First, in order to allow users to find the switch position smoothly in the dark, some wall switches have an indicator light connected to the switch. When the switch is off, the indicator light is still on. A small current is passed through the switch. Second, for all fluorescent lamps, whether they are ordinary fluorescent tubes or energy-saving lamps, the phosphor powder has a certain delay extinguishing characteristic, which is called "afterglow". Now that science has advanced, with liquid crystal displays and corresponding display circuits, it is easy to display things that are not happening at the same time on the same screen. For example, an electrocardiogram monitor displays a horizontal line that fluctuates up and down with the heartbeat. In fact, all the fluctuations on this horizontal line do not happen at the same moment, but have a time process. In the era when there were only CRT monitors in the past, there was only one point fluctuating with the beating of the heart. In order to display a line, a "long afterglow" display had to be used, so that the scanning point did not go out immediately after passing through, but reappeared after a long period of time. Turning off slowly makes the movement of a point become a line display. The oscilloscope at that time was also based on the same principle.
The ニュートラル ライン is the loop of all electrical equipment. since the neutral line has a certain resistance, the greater the the 抵抗 of the neutral line or the より大きい the current of the neutral line, the higher the 対応する 電圧 above. したがって, the zero line is not complete without voltage, and it is also possible that the test pen is slittlely bright. of course, if the neutral line circuit has 不良 接触, etc., the ニュートラル ライン 電圧 意志 be high. So it is best to measure the 電圧 with a 電圧計。
The オープン 回路 of the fuse of one phase of the transformer will also cause the neutral line to be わずかに 明るい いつ 測定 with an electric pen. when a motors burns out and one phase far out of the line is 接地 through the motor, it will also cause the zero line to be わずかに 明るい when measured by the electric pen. いつ その ニュートラル ライン is 切断 から the 電源 電源 および パス スルー the 電気 電化製品, it will また 測定 the ニュートラル ライン あり 電気, および the 電気 ペン is 比較的 明るい。
It's very simple, as long as the neutral circuit is well-conducted, it is impossible for this phenomenon to occur. If this phenomenon occurs, there must be a disconnection or poor conduction somewhere in the neutral line circuit, or the electrical appliances are connected in series. The solution is to firmly connect the disconnected or poorly conducted parts of the neutral circuit. If two electrical appliances are connected in series in one circuit, one electrical appliance will be cut off and only one electrical appliance will be kept.
