|
|
这是标准条款，也不是Y电容都是保护阻抗的，要跨接可接触安全和危险部件间的3 l" b: H7 n9 T- u
protective impedance) {2 x. Y+ h- k+ W7 T
impedance connected between live parts and accessible conductive parts of class II
+ N. i! |' R" p i3 K4 Kconstructions so that the current, in normal use and under likely fault conditions in the
O9 p# }$ b4 M. Lappliance, is limited to a safe value2 a3 w& K" z1 l" Q
, Q e+ H6 |, p( \$ }' [
22.42 Protective impedance shall consist of at least two separate components. If any one
& z. i' V. F% ^# _of the components is short-circuited or open-circuited, the values specified in 8.1.4 shall not
) k2 k, S5 Y* P; _/ Q8 q% l0 abe exceeded.
* ]# W6 }0 @# C" B- JComponent impedances shall be unlikely to change significantly during the lifetime of the5 y: r: n* j8 ~# V0 l
appliance./ E4 ?5 E j- {
Compliance is checked by inspection and by measurement and if necessary, for resistors and) k5 K1 N E1 v6 O+ D
capacitors by the following tests.# H: u2 @3 \$ G$ y3 P
Resistors are checked by the test of 14.1 a) in IEC 60065 and capacitors are checked by the
1 H" J9 B5 f- v) M$ k' Mtests for class Y capacitors in IEC 60384-14 appropriate to the rated voltage of the
1 J% z n+ _" Y C/ \appliance. |
|
[复制链接]
/1 
|关于安规|小黑屋|安规QQ群|Archiver|手机版|安规网
( 粤ICP13023453-10 ) 
窥视卡
雷达卡
发表于 2012-11-5 17:58
显身卡
