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4.7.2.1中有这么一段话
, F, a" i1 [$ ], y! D! kParts requiring a fire enclosure
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-component in primary circuits 是一次电路中所有的元件吗?还是一些特别的元件?单个元件也需要防火外壳吗?还是全部元件由一个防火外壳来保护?/ T6 h0 j: k. h- A* k* u$ a: v! _
-conmpoment in secondary circuits supplied by power sources that exceed the limits specified in 2.5 二次电路中所有的元件吗?单个元件也需要防火外壳吗?还是全部元件由一个防火外壳来保护?
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4.7.1中有这么一段话
0 s* n/ M, x. U4 _for equipment or a portion of equipment,there are two alternative methods of providing protection against ignition and spead of flame that could affect materials,wirlng,wound components and electronic components such as integrated cicuits, transistors, thyristors,diodes,resistors and capacitors
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请问这句话当中是否是说这些wirlng,wound components and electronic components such as integrated cicuits, transistors, thyristors,diodes,resistors and capacitors需要提供防火外壳?是指整机外壳来提供保护吗?还是其他的防火外壳? |
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