|
|
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4 O* K7 i* K5 [2 k0 `9 S' m" ]
protective impedance
# p" p G' @4 Z, F3 uimpedance connected between live parts and accessible conductive parts of class II
! B2 K8 s. e& T' z) U [( Iconstructions so that the current, in normal use and under likely fault conditions in the/ F1 D2 z# _; k
appliance, is limited to a safe value7 u- A# B4 d$ Y+ h: X$ G
& w. l3 o% d' v$ m22.42 Protective impedance shall consist of at least two separate components. If any one+ @( @. q5 w t
of the components is short-circuited or open-circuited, the values specified in 8.1.4 shall not
7 f: x( p! D) U7 n9 Y5 t8 N rbe exceeded.
, M5 m+ F/ h7 m/ V0 wComponent impedances shall be unlikely to change significantly during the lifetime of the0 }0 S9 q0 c6 l
appliance." n2 v3 t2 ^7 S6 @8 Y
Compliance is checked by inspection and by measurement and if necessary, for resistors and
% f% W: w+ X9 h- Q. v4 Q$ V2 Mcapacitors by the following tests.
( | J: o6 a+ t" JResistors are checked by the test of 14.1 a) in IEC 60065 and capacitors are checked by the
9 t6 M8 x. G* R0 _* l% ztests for class Y capacitors in IEC 60384-14 appropriate to the rated voltage of the# Z; o0 ?8 k4 T# R J
appliance. |
|