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【技巧】怎么测量低电压?

更新时间:2017-08-17 11:26:52

A customer is claiming that his tool doesn’t bring the performance shown in the specs: UNIMAT doesn’t reach the maximum set temperature /  UNIPLAN doesn’t weld with full speed / TRIAC doesn’t reach temperature / and so on

有很多客户抱怨机器走的慢,温度达不到最大值!

In most of these cases “low voltage” is the reason. It can be caused by:

多数情况是由于供电压太低导致:

 Bad power supply (weak generator, low voltage supply) 发电机电压低

 Bad extension cable (too thin, too long, half broken cables) 电源延长线不合适

 Bad junctions (old sockets, old plugs, bad fixation of cable to plug, wrong plugs, no plugs, …) 劣质的插头

 Too many power tools on one power source  多台设备在一个电源下同时使用


怎样测量?


1.正确的方式


电压正确测量方式.jpg


Always measure as close as possible to the tool with a two way adaptor while the machine is heating! 

在设备正常加热的情况下测量电压!靠近设备的地方测量!

Double plug right before the tool, while it is heating up.

If you measure the voltage just before the tool on load, you can see what voltage the tool gets while working.


2.不正确的方式


电压测量不正确方式1.jpg


Don’t measure directly at the power supply! 不要测量电源插头处

If low voltage is displayed, you know there is a problem

If the right voltage is displayed, you don’t know whether the power supply at the machine is okay or not.


电压测量不正确方式2.jpg


Don’t measure directly after at the end of the extension cord!

不要直接测量连接线的尾端!

If low voltage is displayed, you know there is a problem.

If the right voltage is displayed, you don’t know whether the power supply  is OK. This can only be tested when the power is under load.


电压测量不正确方式3.jpg


Don’t measure with double plug just before the tool without switching it on! 不要在机器不工作的情况下测量!

If low voltage is displayed, you know there is a problem.

If the right voltage is displayed, you don’t know whether the power supply it is OK. Only measure while machine is heating.

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