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高压瓷片电容常见的漏电原因有哪些?
作者:红宝电容 来源:本站原创 日期:2020-07-16 09:40 浏览

  高压瓷片电容在使用过程中如果使用不当或者是其他的外在因素的影响,都是会出现故障或者是损坏。高压瓷片电容常见的漏电原因有哪些?

  High voltage ceramic capacitor in the use process if improper use or other external factors, are likely to failure or damage. What are the common leakage causes of high voltage ceramic capacitor?

  高压瓷片电容在正常情况下应是高绝缘的,绝缘值高达1.0E+9欧姆,多种因素会导致瓷片电容的绝缘下降造成漏电现象。总结有以下两点原因:

  Under normal conditions, high voltage ceramic capacitor should be highly insulated with insulation value as high as 1.0e + 9ohm. Many factors may cause the insulation of ceramic capacitor to drop and cause leakage. There are two reasons for this

  首先是表面脏污引起的表面绝缘下降,这类漏电电流不十分大,一般是微安级别,热风吹一吹绝缘值会上升。

  First of all, the surface insulation is reduced due to the surface dirt. This leakage current is not very large, which is generally micro ampere level. The insulation value will rise when the hot air blows.

  其次内部裂纹,有焊接引起的裂纹和瓷片电容制造不良自带裂纹。这类裂纹引起的漏电电流会不断升高,严重时会引起局部爆炸起火。

  Secondly, there are internal cracks, cracks caused by welding and cracks brought by poor manufacturing of ceramic capacitor. The leakage current caused by this kind of crack will increase continuously, and will cause local explosion and fire in serious cases.

高压瓷片电容漏电原因分析.jpg

  电容一旦动过烙铁或升温,都会恢复正常,许多工程师都往往错误的分析为焊锡膏问题,很多人第一次遇到也没有分析正确,第二次才准确分析,把样品剖开显微镜观察,确实是电容有问题了。

  Once the capacitor is moved by the soldering iron or heated, it will return to normal. Many engineers often mistakenly analyze the problem as solder paste. Many people do not analyze it correctly for the first time, and then analyze it accurately after the second time. When the sample is dissected and observed by microscope, it is indeed that there is something wrong with the capacitor.

  对于高压瓷片电容漏电从可靠性角度说,是属于典型的低应力失效,多层陶瓷电容、继电器、涤纶电容都有这些问题。如果供电不干净导致,比如直流电压异常,即使电容的额定电压是50V、25V的也会漏电,但是在1~10V之间的这种电容最为严重,它在这种直流电压异常的情况下工作一定时间后,就会漏电,而且随时间增长越来越多,越来越严重。

  From the reliability point of view, the leakage of high-voltage ceramic capacitor is a typical low stress failure. Multilayer ceramic capacitor, relay and polyester capacitor all have these problems. If the power supply is not clean, such as abnormal DC voltage, even if the rated voltage of the capacitor is 50V or 25V, it will leak, but the capacitor between 1 ~ 10V is the most serious. After working for a certain period of time under the condition of abnormal DC voltage, the leakage will be more and more serious with time.

  如果想要避免这样的情况出现,就要选择正规厂家的知名品牌的电容。山东红宝电子有限公司主要经营各种类型的电容元器件,包括:电解电容、高压瓷片电容、薄膜电容、超级电容、贴片电容等等,是韩国三和电容的特约代理商。

  If you want to avoid such a situation, you should choose the capacitor of well-known brand of regular manufacturer. Shandong Hongbao Electronic Co., Ltd. mainly deals in various types of capacitor components, including electrolytic capacitor, high voltage ceramic capacitor, thin film capacitor, super capacitor, chip capacitor and so on.


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