hahdhaw 发表于 2012-4-21 08:13

Y1Y2 X1 电容在做IEC60384-14， 已经UL认证的时候，都已经做过live part to case 的electric strength 的测试，而且电压是2000Vac ,针对Y1 做到4000Vac 。

abu013 发表于 2012-4-21 19:27

学习了，谢谢

cshuaiqiu 发表于 2012-7-5 13:49

liuyingcai 发表于 2012-11-12 23:10

学习了许多。:)

Aslan 发表于 2012-11-28 15:05

学习ing

1345141993 发表于 2012-12-17 18:13

准确的说，Y1电容只能连接在工作电压低于Y1电容标称电压的双重绝缘或加强绝缘之间，Y2电容只能连接在工作电压低于Y2电容标称电压的基本绝缘之间。

silvermin 发表于 2013-1-7 14:00

老师说的很对，不过A1里面对这块作了适度修正，写得更合理了，主要还是要根据两端的工作电压来判定。
When fitting Y capacitors across barriers, the dielectric strength requirement must be
considered. For example, for voltages in the range of 212 V peak to 354 V peak, two MEANS
OF PATIENT PROTECTION are required to be tested at 4 000 V a.c. This would then require the
use of Y1 capacitors. Two Y2 capacitors in series would not withstand this voltage as they are
rated at 1 500 V a.c. each. For voltages below 212 V peak, two Y2 capacitors would suffice as
the dielectric strength requirement is 3 000 V a.c.

A Y capacitor (Y1 or Y2 only) complying with IEC 60384-14 is considered equivalent to one
MEANS OF PATIENT PROTECTION. Where two capacitors are used in series, they shall be
identical in type (either both Y1 or both Y2) and shall have the same NOMINAL capacitance.
The capacitor(s) shall meet the dielectric strength for the type of protection for which they are
being used (i.e. one or two MEANS OF PATIENT PROTECTION).

Where the working voltage across a barrier forming a MEANS OF PATIENT PROTECTION is less
than 42,4 V peak a.c. or 60 V d.c., a single Y1 capacitor is acceptable for two MEANS OF
PATIENT PROTECTION.
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