标题: IEC 60884-1:2002+A1:2006 clause 20的疑问 [打印本页] 作者: ljh809809 时间: 2015-10-23 14:18 标题: IEC 60884-1:2002+A1:2006 clause 20的疑问 第20章有下面两段话 + D \1 V: f6 W- W; O" q% Q$ z0 sResistors and inductors are not connected in parallel except, if an air-core inductor is used, a , S6 @1 X9 H- I4 @5 b- j1 jresistor taking approximately 1 % of the current through the inductor is connected in parallel9 b u! ^9 t) M% ~4 o/ w2 ~
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Iron-cored inductors may be used, provided the current has a substantially sine-wave form., V' l( t) r8 i* l* w! Z5 l+ |
For the test on three-pole accessories, three-core inductors are used. 1 u" L3 K6 t* U( M- M, k/ m* G问题1：如何理解上面这段话？. C r; E' D' p* ~
% o4 B" r% ?% v' O9 t DAccessible metal parts, metal supports and any metal frame supporting the base of flush-type- L. s$ A0 r& X5 s. n
socket-outlets are connected through the selector switch C; for two-pole accessories, to one " C( @9 b5 U/ r/ K" T1 Mof the poles of the supply for half the number of strokes, and to the other pole for the 7 t3 O9 t2 u' p2 u/ qremainder; : W v% X- y8 c3 v W. B$ K4 s$ p问题2：如何理解上面这段话？ 3 O1 T# ?% s, H3 e' D1 g' Q3 J; U- J$ L' |3 ~
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