在强电的地和弱电的地之间接

panhaojie

个电容，这个电容有什么要求吗？比如我在220V的中线和3.3V的电源地之间接个电容，有什么要求吗？我看到有电路上接个标识为VA4的黄色电容，它旁边的序号为：CV1那么它的具体值是多少呢？

anlishao

数字地和保护地连接的方法有好几种。
$ ]$ ?* H* A2 d7 ^用103/1KV的电容连接，用1M电阻连接，用电容加电阻连接。

3 C  j1 P+ v! Z, g* X  z6 H' m我只是看到过，具体为什么也不太清楚。

6940

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超級狗

Y 電容特性
This use of a Y-type capacitor requires that the capacitor have the following qualities:

• Very high breakdown voltage, so the capacitor case can end up being quite large.
• Larger capacitance value than the winding-to-winding capacitance of the transformer.
  

- \3 r5 ~- O: h9 ~+ [The capacitance value is not always very large, typically being only on the order of nF. The capacitance value represents a trade-off when we start to look at noise control versus safety, the latter of which relates to leakage current.

( R3 ^8 @4 I* v5 x) z圖示說明
The Y-type capacitor in this circuit (C13) bridges the primary and secondary grounds.



9 T! @; y. e( Q2 E4 M

bazhonglei

要求该电容失效是开路！Y电容！