向大家请教UL1778一个问题

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在UL1778第5.2章节中有如下内容：
9 G1 Z2 L  U/ \3 D; N2 H5.2 Electric strength
* b# E- h: ?; `2 t! }Additional subclause:
2 d4 N* q: l- {  `' C5.2.101 Electric strength test
The terminals of across-the-line capacitors shall withstand without breakdown 1000 plus twice
! i9 y9 q" u& E. |: Z7 hrated a.c.voltage, or d.c. equivalent, applied for 1 minute.
An additional pulse current test is under consideration.
: [! r4 W+ `7 P& ]7 f$ b" a
3 e: P0 \! X, C) b3 r" I0 k1 h0 u8 w现在请问across-the-line capacitors 是什么电容？X电容？或者Y电容？还是都包括在里面？ 如果是电容，那应该只能打DC打不了AC，那标准就不应该写ACor DC.
7 ], y) R, B8 g$ c9 P% j; B请各位发表发表看法。

Liu

across-the-line capacitors 是指跨接在L和N之间的或者是L（N）和Grounding之间的电容，L&N之间是X电容，L（N）和Grounding之间是Y电容。

Liu

再给个UL条款可能更明确：
* |; g8 c/ o6 g8 S) ZA capacitor or EMI filter connected across the primary circuit shall comply with the requirements in the Standard for Capacitors and Suppressors for Radio- and Television-Type Appliances, UL 1414, or the Standard for Electromagnetic Interference Filters, UL 1283. A capacitor or EMI filter is determined to be across the primary circuit when, in a shorted condition, a current of greater than 1 ampere passes through it when the equipment is in a heated condition. The means used to limit the current to 1 ampere or less shall be a fixed impedance or a protec tive device rated 1 ampere or less.

papayaya

選用安規認證電容的話這個章節就直接跳過去了，簡單多了