标题: UL 508C Ground fuse 解释 [打印本页] 作者: canhai2002 时间: 2011-10-22 17:03 标题: UL 508C Ground fuse 解释 45.4 Ground fuse i" ^( ]' y0 w9 N% q3 b
The ground fuse shall be connected between the enclosure and earth ground, with the main input ground connection removed./ w# w: h; }. D4 M
The ground fuse shall be connected between the enclosure and the main input power terminal judged least at risk of arcing to earth ground, with the main input ground connection removed. For 3-phase drives, the main input power terminal judged least at risk of arcing to earth ground is the L2 terminal. / ?- h" y$ s$ F$ G% O7 J7 M. g5 V& }9 Z; Q6 L/ N. O# v9 I
最近有在研究UL508C，本身英文不好，对其中的部分意思理解不了，还请大家帮帮忙～. l, e' ~' f1 x, T' n. Q$ E4 |4 F5 g% X
1.main input ground connection removed是如何理解的) H6 y( H- x8 k% R
2.提到的L2 terminal是指输入L1,L2,L3中的L2吗？作者: chenmin9 时间: 2011-10-22 20:40
main input ground connection removed: "main input" 的 "ground connection(中线)"除掉.作者: canhai2002 时间: 2011-10-24 17:26
这是不是指电源端与输入端的中线不接？作者: canhai2002 时间: 2011-10-25 21:23
有没有了解的DX帮忙解释一下啊作者: junpi 时间: 2011-11-4 00:31
1.main input ground connection removed是如何理解的; T6 ^ k$ u2 k& }5 o5 O: P
将设备的主接地导体移除，就是说设备地线不接 ' u' d, O& N1 ?2.提到的L2 terminal是指输入L1,L2,L3中的L2吗？ * ]0 C# j2 v! A, G. J+ S H0 I指三相中的L2相作者: canhai2002 时间: 2011-11-5 11:53
8 {# [& z+ G+ a# Q- f那请问For 3-phase drives, the main input power terminal judged least at risk of arcing to earth ground is the L2 terminal.这句话怎么理解啊？谢谢作者: junpi 时间: 2011-11-5 21:52
对于三相设备，最不容易对地产生电弧的是L2相