向大家请教UL1778一个问题
在UL1778第5.2章节中有如下内容：5.2 Electric strength
Additional subclause:
5.2.101 Electric strength test
The terminals of across-the-line capacitors shall withstand without breakdown 1000 plus twice
rated a.c.voltage, or d.c. equivalent, applied for 1 minute.
An additional pulse current test is under consideration.
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.
请各位发表发表看法。 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。 再给个UL条款可能更明确：
A 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. 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
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