hijummy520 发表于 2007-8-23 09:22

請問關於漏電流問題

在EN 50178裡面有提到,工業產品的漏電流需小於30mA,想請教一下,如果說產品是屬於大馬力的情況下,漏電流很難不超過這個限值,想請問在EN 50178裡面是否有說明萬一超過限值時的處理方式?有提到說超過的話要加註警語嗎?那是在哪一個部份?謝謝~

kevin1946 发表于 2007-8-23 12:01

这是EN50178哪部分的要求啊?我只记得3.5mA ac,10mA dc的要求。如果超过了需要在用户手册中说明,并保证接地导体是截面积大于10mm^2的铜线。

hijummy520 发表于 2007-8-23 12:54

5.2.11.2 Compatibility with residual-current-operated protective devices in case of low
leakage current
A residual-current-operated protective device (RCD) with rated fault current Ifn ≤ 30 mA may
be used to provide protection in case of indirect contact and/or supplementary protection in
case of direct contact. It is presupposed that the leakage current of the EE(s) according to
5.2.11.1 is low enough not to unintentionally trigger the RCD connected in series.

這一段,想說哪裡有註明說超過30 mA就要在用戶手冊中說明?

hijummy520 发表于 2007-8-23 12:55

Where an EE has a continuous leakage current of more than 3,5 mA a.c. or 10 mA d.c. in
normal use, a fixed connection is required for protection; this shall be stated in the operating
manuals.

這裡有說明3,5 mA a.c. or 10 mA d.c.但是不知道這包不包含超過30mA的處理方式?

kevin1946 发表于 2007-8-23 14:08

引用第2楼hijummy520于2007-08-23 12:54发表的:
5.2.11.2 Compatibility with residual-current-operated protective devices in case of low
leakage current
A residual-current-operated protective device (RCD) with rated fault current Ifn ≤ 30 mA may
be used to provide protection in case of indirect contact and/or supplementary protection in
case of direct contact. It is presupposed that the leakage current of the EE(s) according to
.......

这里不是讲的漏电流的问题,是讲剩余电流(residual current ,不知台湾是否这样翻译),剩余电流是一种故障电流,是在发生故障时相线和中线的电流不同产生的矢量和。所以为了防止故障产生需要在设备上增加剩余电流保护装置(RCD),漏电流是一种正常的电流。以上的内容是讲,当漏电流很小的情况下,使用额定值小30mA的剩余电流保护器(RCD)也不会产生误动作。具体的翻译请上下文。

hijummy520 发表于 2007-8-23 14:11

這樣我就納悶了,那工業用的漏電流限制是多少呢?

kevin1946 发表于 2007-8-23 15:53

引用第5楼hijummy520于2007-08-23 14:11发表的:
這樣我就納悶了,那工業用的漏電流限制是多少呢?
3.5mA AC/10mA DC,如果超过了,需要满足5.2.11和5.3.2.1的要求!
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