|
|
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
! W4 ^; i8 C+ J4 u$ u: F+ p& Q4 A. Jprotective impedance2 j. p) I ~) C1 N( o% k
impedance connected between live parts and accessible conductive parts of class II
0 r4 [! J, j! L8 D$ K3 w( cconstructions so that the current, in normal use and under likely fault conditions in the% o; r! o* Z$ J3 E
appliance, is limited to a safe value
' J8 N& u1 ]% }. ?8 X+ v8 G* F9 y
22.42 Protective impedance shall consist of at least two separate components. If any one
2 K) ^' e2 Z6 xof the components is short-circuited or open-circuited, the values specified in 8.1.4 shall not% h1 q) Y8 A3 w6 V0 j- g# s
be exceeded.( M# S) }+ Y; Z; N9 L' k
Component impedances shall be unlikely to change significantly during the lifetime of the* Q5 s0 H+ M3 |% V
appliance.
4 ^3 G0 F: P8 _( x: D: ~Compliance is checked by inspection and by measurement and if necessary, for resistors and
) o6 V" q/ ~# Tcapacitors by the following tests.1 N) c P: n$ |: z [
Resistors are checked by the test of 14.1 a) in IEC 60065 and capacitors are checked by the9 d( W# f5 j8 w# L8 G& p& H6 F
tests for class Y capacitors in IEC 60384-14 appropriate to the rated voltage of the
1 Q0 z- u- E2 m! fappliance. |
|
[复制链接]
|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
