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8 s( k+ Z. p8 G0 o
Resistors and inductors are not connected in parallel except, if an air-core inductor is used, a% @, V3 s" h# c
resistor taking approximately 1 % of the current through the inductor is connected in parallel ! c5 P8 H" L8 @/ U$ Qwith it.( }$ C- `2 ~3 D4 ^
Iron-cored inductors may be used, provided the current has a substantially sine-wave form.& b2 Z$ Q+ y3 L' T
For the test on three-pole accessories, three-core inductors are used.3 s6 c5 f5 o+ W/ G' V! ?( g
问题1：如何理解上面这段话？ ) K4 t. H' C7 p3 Q4 f, d# s: h: h6 E- q/ u: i; c
Accessible metal parts, metal supports and any metal frame supporting the base of flush-type; ~* N; ^# G* V" A
socket-outlets are connected through the selector switch C; for two-pole accessories, to one. D( v" \& n9 _7 D- c0 }2 U2 o
of the poles of the supply for half the number of strokes, and to the other pole for the$ l7 W" J2 n& t# D: F
remainder;9 x& n2 X7 ^& ?
问题2：如何理解上面这段话？5 ]& n( Y9 h) S; S3 T