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7.8.2 Minimum spacings on printed wiring boards and for board-mounted components shall be not less; J5 m1 m, t1 _$ ^: ]
than those shown in Table 7.5 between:
9 H' R! @- r ]% J6 y5 `" ha) Uninsulated live parts of opposite polarity,$ S. i3 p; o4 G' C
b) Uninsulated live parts and a grounded dead-metal part, and& l1 U; n r& D) ^& y3 T6 e+ i
c) Uninsulated live parts and an accessible dead-metal part.3 n( f& b' K- l
, g0 @. R1 J U( J( c
7.8.2 里面说的是不同极性距离，但是在table 7.5里面根本没有啊; P) |- ^6 S3 o; _8 ~1 u5 @" a9 f
table 7.5 里面的这些是什么意思
' A" ^4 \7 U: B0 `2 J# I( E9 v. N6 _Live parts reliably positioned AND/ c2 j( ^7 B& \- V0 X% S
insulator with CTI ³ 600 (PLC = 0)b; i.e.:
+ G- a. B& z3 J3 l/ Badjacent PWB traces, lead pins of
# j) h: |( D- ]/ K! I8 rsemiconductors to their mounting, etc.
! ~* \* r9 r1 [
9 W9 ]1 @ p7 I8 A+ T7 k4 \+ I; K; z4 KLive parts reliably positioned AND. @/ G! c5 I: ~* F: j
insulator with CTI ³ 100 (PLC £ 4)c; i.e.:
; b# s g$ E# S6 t- l$ zadjacent PWB traces, lead pins of
1 e( d. W: M+ l1 isemiconductors to their mounting, etc.
$ o4 r5 ]- B* c6 ^! o$ \! E |
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发表于 2015-11-12 11:27
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