标题: clause 27.3 [打印本页] 作者: 小猫咪 时间: 2015-8-24 19:53 标题: clause 27.3 本帖最后由 小猫咪 于 2015-8-25 11:01 编辑 6 s* U, Q, T' [9 F 0 C% e! w9 Q5 T7 o5 F[attach]91957[/attach]# q7 s5 ^! b7 m C7 ]# w: p. T, N
27.3 If a detachable part having an earth connection is plugged into another part of the) C5 z* O* Z* W8 F6 z- v
appliance, the earth connection shall be made before the current-carrying connections are5 _6 l" ?0 A% O5 B4 |
established. The current-carrying connections shall be separated before the earth connection4 }) w' s$ q! F% P
when removing the part. % B) O5 x+ B( b/ K' f& F% |For appliances with supply cords, the arrangement of the terminals, or the length of the& O/ S9 o4 Z9 ?" ^, c2 B
conductors between the cord anchorage and the terminals, shall be such that the currentcarrying' y& ^7 }) H6 c0 y" x( q) g
conductors become taut before the earthing conductor if the cord slips out of the cord ) F# o% x2 M9 T! J. v9 V. g6 sanchorage.! K. z! |5 m2 q4 N3 M& r! ?
大家是怎么理解这两段内容的呢? ; g$ ]- h- j% }$ b, Q" T+ c/ w针对第一段是可拆卸的,就是类似于无绳熨斗累的,接地端子最后分离。" K6 K, `9 _& N1 }8 q
第二段, 是说载流导线要在接地导线之前被拉紧。 2 ?5 q# |+ U' j$ O& N; m问,如果是载流导线已经接到一个插片式的端子上了,是否要跳过这个端子去考虑?; M7 C9 O( T, F$ e+ D+ X% q% d+ G
如图,途中所有的连接处都是插片式的。- b: z1 X) x- R/ { 作者: tzsn 时间: 2015-8-24 21:37
不太明白你说的跳过这个端子考虑是什么意思,能否描述得具体点,最好有个图作者: plmijb 时间: 2015-8-25 08:09
简单点说,第二点,地线要比L/N 线长些,(相对于固定点),L/N 线拉紧后,地线还未拉紧。作者: ylgc123 时间: 2015-8-25 08:43
精简的讲:①针对一个可拆卸的部件,接地要先通后断。②地线要比其他线长。作者: 热爱学习 时间: 2015-8-25 09:10