|
|
7.8.2 Minimum spacings on printed wiring boards and for board-mounted components shall be not less9 b) J7 {+ L1 }7 f( i0 V( z3 o
than those shown in Table 7.5 between:
: Y5 b6 _9 d, ~) g6 ^1 Na) Uninsulated live parts of opposite polarity,
% y9 \7 B& h) A" ?$ o/ Ub) Uninsulated live parts and a grounded dead-metal part, and
`+ P9 E: j: Z" Bc) Uninsulated live parts and an accessible dead-metal part.
/ D& \9 S$ C* J5 G" i' s
) ?1 @5 @0 }6 ^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
0 D1 d8 T( G7 htable 7.5 里面的这些是什么意思9 Q! l( b+ Z4 D& S; A, g- u
Live parts reliably positioned AND5 a' v4 k% a# X& O' M m
insulator with CTI ³ 600 (PLC = 0)b; i.e.:' f8 O( H. A2 K- ^
adjacent PWB traces, lead pins of+ R& r5 i2 |& j ~3 m
semiconductors to their mounting, etc.# d% I3 y9 e( M- [' K8 f/ n( t k
/ p- u8 K5 |" b( T% ~& G
Live parts reliably positioned AND9 A9 O5 j6 p: @
insulator with CTI ³ 100 (PLC £ 4)c; i.e.:
* V" i% d( J3 M- Dadjacent PWB traces, lead pins of/ J& I3 ?. y) I; o% v
semiconductors to their mounting, etc.
, L- N9 Y' e3 m1 a |
|
/1 
|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 2015-11-12 11:27
提升卡
置顶卡
沉默卡
喧嚣卡
变色卡
抢沙发
千斤顶
显身卡