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热爱学习 发表于 2015-8-13 17:07
. C" Z z g/ ]; G/ _1 U9 j固体绝缘29.3的三条是选择性的,只要满足其中一条即可,厚度仅仅是其中一条,并非必须满足
3 n. H% s6 R1 |% H# X0 t/ l1 e/ D7 _而且第三条就 ... + A& ]8 f" t% c0 u5 {
22.33 条款2的问题可以归结于对于可接触的导电液体单层绝缘是否可靠的问题,很明显,标准是认为不可靠的,水和金属应该考虑为一体,因为金属是导电没有绝缘的,做绝缘的只是单层的陶瓷体,就算陶瓷体可以做为加强绝缘,也是单层的,也就是说这种结构是绝对不允许的,考虑陶瓷体开裂的问题,还是直接包三层绝缘胶带比较靠谱
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For class II construction, conductive liquids that are or may become accessible in normal S4 l8 r- ?" L3 v- ^3 f* m' ~; ~
use and conductive liquids that are in contact with unearthed accessible metal parts shall4 r; T/ U) q5 }) w( v. g; [0 W. V0 i
not be in direct contact with basic insulation or reinforced insulation unless the reinforced1 z! r ~0 j: P$ p r2 t
insulation consists of at least 3 layers. |
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