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第20章有下面两段话
# j M; w ?" ]: _7 jResistors and inductors are not connected in parallel except, if an air-core inductor is used, a
' y8 R# w8 u1 y) oresistor taking approximately 1 % of the current through the inductor is connected in parallel
" ~& \. p1 Y, T$ b& j, ]2 d0 ?0 `$ j4 ]$ Mwith it.
0 l' V( P8 s: z) h$ [Iron-cored inductors may be used, provided the current has a substantially sine-wave form.2 I# k* w3 w. d( o; l* V1 M
For the test on three-pole accessories, three-core inductors are used.
; g& T! r, S& [2 m' E$ n7 P/ r问题1:如何理解上面这段话?
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Accessible metal parts, metal supports and any metal frame supporting the base of flush-type+ R3 \2 Q( M) K- ]
socket-outlets are connected through the selector switch C; for two-pole accessories, to one
9 j9 S( w- X5 a7 }of the poles of the supply for half the number of strokes, and to the other pole for the8 V6 ~' c" d$ h! s' o
remainder;
3 l0 m* g% m* Z* b' u问题2:如何理解上面这段话?
; \# [; I7 z) j. z" {& y5 S8 u2 t5 |! f
# d3 C: _" N$ e, U$ E& X' L `+ n2 v; J `/ e: x& m
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