本帖最后由 luqing_sz 于 2012-2-7 13:39 编辑
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与大家一起讨论下灼热丝安规问题: 我们有个电饭煲,销往欧洲(适用IEC60335-1,IEC60335-2-15),且为无人照看的器具. 如图:支撑PCB板上的焊点(电流>0.2A)的支架是否需要做850度灼热丝,能否用30.2.3豁免掉?这个支架不用做30.2.3.1的850度灼热丝?欢迎各位讨论: IEC60335-1:2010,30.2.3条: Appliances that are operated while unattended are tested as specified in 30.2.3.1 and 30.2.3.2. However, the tests are not applicable to: – parts supporting welded connections and parts within a distance of 3 mm of these connections; – parts supporting connections in low-power circuits described in 19.11.1 and parts within a distance of 3 mm of these connections; – soldered connections on printed circuit boards and parts within a distance of 3 mm of these connections; – connections on small components on printed circuit boards, such as diodes, transistors, resistors, inductors, integrated circuits and capacitors not directly connected to the supply mains, and parts within a distance of 3 mm of these connections. NOTE Some applications of the term "within a distance of 3 mm" are shown in Figure O.5. 首先声明一下:以下邮件不带人身攻击,纯技术讨论: 以下是TUV SUD技术老大的回复,大家参考一下: 鲁清: 你好。 问题很好,虽然是一个老问题。 我的回答还需要小金工进一步阐述才好。 对你引用的章节,意见如下: a) 被测试的主体是什么,是焊点还是绝缘材料?显然,前者是错误的,我们要测试的充当绝缘的塑料件。而不是金属,无机物或其他……. b) Soldered connection是什么具体部件?请注意我说的是部件。从字面含义理解是由锡焊来实现的连接件,请注意connection不是一个一个点,而是“连接件”,我给它下一个定义便于你理解:它是在板子上通过锡焊连接内部或外部导线的一个连接件,PCB板子上面的接线/排线接插装置(需要的话,可以让小金工挂张部件图给你)。 c) 如果按照你理解的思路,我们会走到一个悖论的死胡同,那就是放掉了与测试要求与安全有着极紧密联系的材料的耐温阻燃要求,这是绝不可取的,也根本不是标准的原意。 d) 顺便说一句,为什么说是个好问题,因为这个问题会让很多对条款理解似是而非的人产生迷惑,我又为什么说它是个老问题,因为我进这个行业,我们家电就讨论过这个问题。3mm理解不难,我挂张小图, Kind regards XXX JIN TÜV XXX China EEC Department From: 鲁清 Sent: 2011年12月12日 15:19 To: Jin, Zhiqiang Subject: Re:RE: Re:RE: Re:Re: 测试问题 金工,你好! 小金工解决不了我的问题,只能亲自找你了 问题:与PCB板上的焊点接触的支架是否需要做850度灼热丝? POVOS的意见:不需做850度灼热丝.原因如下: 1.IEC60335-1:2010版很清晰的规定:30.2.3 Appliances that are operated while unattended are tested as specified in 30.2.3.1 and 30.2.3.2. However, the tests are not applicable to: – soldered connections on printed circuit boards and parts within a distance of 3 mm of these connections; NOTE Some applications of the term "within a distance of 3 mm" are shown in Figure O.5. ,你看一下Figure O.5图中,详细说明了哪些是3mm的部件. 期待你的回复! Best regards, Luqing No. 999, Husong Road, Songjiang, Shanghai 201613 P.R.China. |