一点鱼缸加热器的探讨

我不是灰太狼

广东安规检测
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现在手头有个案子，是鱼缸用的加热器，产品见下图：

, `' v. b4 \/ ]8 f里面是发热丝，外面是玻璃外壳，2插（默认II类）。标准是IEC/EN 60335-2-55。
% X, \0 z2 E) _
请看21.103. Class II appliances for use in water are supplied at rated voltage and operated
under normal operation until steady conditions are established.
) E- A% L' M+ Q' eIf the outer enclosure or its sealing means have been damaged during the impact test, they
+ P, r/ }/ e7 s& {/ ]$ c0 B/ `3 `are made ineffective.
The appliance is then immersed in water containing approximately 1 % NaCl and having a
temperature of 20 °C ± 5 °C. The highest point of the appliance is located 150 mm below the
surface of the solution.
* f% ?4 ~: N8 @0 _# \After 30 s, the leakage current is measured, as specified in 13.2, between any pole of the
; j5 o# y% ?' e% K# ksupply and a rectangular stainless steel electrode, having dimensions approximately
: V6 x, E6 Z$ e7 [/ u; h5 O250 mm x 50 mm, placed in the solution.
+ L# @. ^+ `: N- H0 K( p' l: {% d* s4 |The leakage current shall not exceed 3 mA.

$ `$ |: Q/ [$ O测试的时候它的漏电流是0.05A，依据标准判定应该是OK的。
% R+ i! P( O) W4 D& |4 [
  [5 ~& ^- {  C( \6 s6 r- o4 P6 `1 U但是有点疑问，为什么测电源电极与不锈钢电极呢？目的是什么？
' K; _5 H; T/ |4 t- ^9 X个人感觉应该测不锈钢电极与地之间....
3 b# [8 ?% d/ I3 t: z
' C( \/ |$ g& `0 O欢迎各位讨论

kuiyin01

其实测的应该就是any pole of the supply and accessible parts.
  I$ |, C: _, s8 J2 {* j: V这个不锈钢电极的作用就像打高压时的metal foil 的作用一样a rectangular stainless steel electrode, having dimensions approximately
, X* E+ b' L. ^% l250 mm x 50 mm, placed in the solution