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：
. X! [: d5 K8 C
& t: N8 O' s/ M5 O! A9 L; B, E: z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。

& X4 d0 U: ^  i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.
If the outer enclosure or its sealing means have been damaged during the impact test, they
, H& k" \- |/ D: Lare made ineffective.
The appliance is then immersed in water containing approximately 1 % NaCl and having a
. [1 z& T  y2 u7 Y3 v3 Qtemperature of 20 °C ± 5 °C. The highest point of the appliance is located 150 mm below the
surface of the solution.
4 b1 F' ]. n2 n+ B' W8 u+ B1 s* tAfter 30 s, the leakage current is measured, as specified in 13.2, between any pole of the
! T6 V+ ?, h* }, f5 y$ k+ W% jsupply and a rectangular stainless steel electrode, having dimensions approximately
250 mm x 50 mm, placed in the solution.
) X$ @$ V% M9 f1 `$ UThe leakage current shall not exceed 3 mA.
' F+ ~" K9 V2 P+ p& w
测试的时候它的漏电流是0.05A，依据标准判定应该是OK的。

2 @  V% @& U8 l1 J3 J9 p+ W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？
! A1 m6 @& D3 n' k# ^个人感觉应该测不锈钢电极与地之间....
! j6 q& M; L0 B  O
欢迎各位讨论

kuiyin01

其实测的应该就是any pole of the supply and accessible parts.
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
250 mm x 50 mm, placed in the solution