|
|
第20章有下面两段话
8 B# S" _/ Q; ~' \8 n) QResistors and inductors are not connected in parallel except, if an air-core inductor is used, a
$ Y, [6 ^+ L( H |. F! Fresistor taking approximately 1 % of the current through the inductor is connected in parallel
5 d) q' a3 ^2 m/ G" Kwith it.
5 H: t$ Q3 p1 Z" [Iron-cored inductors may be used, provided the current has a substantially sine-wave form.
0 X3 e! o' y/ n) d: C9 U' G$ W9 QFor the test on three-pole accessories, three-core inductors are used.
! {6 J( h" k( G问题1：如何理解上面这段话？, f: G4 U' H1 x. s7 t; g
% I+ w& l+ j2 \3 \. r; ?
Accessible metal parts, metal supports and any metal frame supporting the base of flush-type
( f$ v8 o+ Q' I5 K8 j, |$ X7 [socket-outlets are connected through the selector switch C; for two-pole accessories, to one& b6 T- Z2 ? a n' }* K* D5 J& Y
of the poles of the supply for half the number of strokes, and to the other pole for the
% T; d2 x& z/ U/ bremainder;
2 b9 R$ j) l, @# R" Z# E问题2：如何理解上面这段话？: W q; L, G2 k; l
7 q! e4 S1 \9 r' _/ L5 {
% s; Z7 G' i5 ^
! Y: s7 M; H0 z" w6 J# u7 G2 l |
|
/2 
|关于安规|小黑屋|安规QQ群|Archiver|手机版|安规网
( 粤ICP13023453-10 ) 
窥视卡
雷达卡
发表于 2015-10-23 14:18
收藏
分享
好帖
鸡蛋
提升卡
置顶卡
沉默卡
喧嚣卡
变色卡
抢沙发
千斤顶
显身卡