联系我们
联系我们 库存

什么是共模电压?

All too often customers find their relays failing early in their life times that is often caused by the existence of common mode voltages.  Common mode voltages usually arise from line voltages in the area or nearby a given circuit.  If there is stray capacitance in the line it can become charged to the peak of the line voltage.  If the line voltage is 240 VRMS this translates to potential peaks as high as 400 volts.  Switching this voltage even though the stray capacitance is only, say, in the order of 50 picofarads, it will cause metal transfer on the contacts.  This will eventually cause early life failures.  Better grounding can eliminate common mode voltages.  Reducing the stray capacitance will help.  Also, adding some resistance in series with the contacts will reduce the inrush.  Keep in mind all the damage occurs in the first 50 nanosecond upon contact closure.

文章分类

订阅我们的电子邮件

We Will Use The Email Address You Provide To Send You Marketing And Promotional Materials.

关注我们

领导层聚焦

Video
表格下载
Products compare