一点鱼缸加热器的探讨

我不是灰太狼

广东安规检测
有限公司提供：

小型摆管淋雨试验机

IPX5X6X7喷水试验机

1000L恒温恒湿箱

各种试验指现货

可程式恒温恒湿试验箱

水平垂直燃烧机

自动卷线器试验机

耐划痕试验机

各种灯头量规现货

灼热丝试验机现货

GB1002插头量规

IPX1-X7淋雨现货

IEC61347/UL935镇流器热试验箱

灯具防风罩

IK冲击试验机

UL498插头插座量规

VDE0620插头插座量规

稳定性试验台

家电温升测试角

针焰试验机现货

热电偶焊机现货

家电125mm试验指

E12灯头量规

无绳壶无绳电熨斗插拔寿命试验机

IEC60335试验指甲

现在手头有个案子，是鱼缸用的加热器，产品见下图：
4 Q3 c5 \" v4 X
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。

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.
& Y1 l* s; r0 N( \If the outer enclosure or its sealing means have been damaged during the impact test, they
9 w4 r( }7 c: H* C+ w3 e. Dare made ineffective.
The appliance is then immersed in water containing approximately 1 % NaCl and having a
3 p( O8 d! V+ D! F: Ytemperature of 20 °C ± 5 °C. The highest point of the appliance is located 150 mm below the
surface of the solution.
' @  T! `, V- J* f4 w3 H1 mAfter 30 s, the leakage current is measured, as specified in 13.2, between any pole of the
+ k# X; R# f3 S, B9 r) Psupply and a rectangular stainless steel electrode, having dimensions approximately
' Y7 J' b. Y9 `  @+ p# ^250 mm x 50 mm, placed in the solution.
4 r2 U1 `4 [( g3 _& C+ v6 `: kThe leakage current shall not exceed 3 mA.

6 r8 w7 j1 ?( d/ J测试的时候它的漏电流是0.05A，依据标准判定应该是OK的。

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？
1 ^' K5 e8 I- |6 S% g% B2 v& G个人感觉应该测不锈钢电极与地之间....
$ s; y# n" Y( P1 v) R! R& E- z: ~# W
欢迎各位讨论

kuiyin01

其实测的应该就是any pole of the supply and accessible parts.
0 g( A7 X% @1 }( A0 M. L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