|
|
|  DSH 5063 Y4 b+ P% M8 x) }4 E
2 v' u9 m7 Y$ W' x/ V B | Creepage distances, clearances and distances through insulation" Z8 c E6 n9 Z" t w5 p
| 29.2
0 g, Q4 T' z8 w) ^1 [- ]6 G | 60335-1(ed.3)
- K1 G* ?2 X3 t+ V. m6 |. y2 u* S |
5 T& _# |" r/ \4 ]! q
Question:+ C# X8 M+ {4 d; R
What creepage and clearance distances apply across parts of same polarity when a cut out
3 X% {/ j: r- zoperates during clause 19?
1 U5 i2 v, n+ aRationale:% q6 l* C+ b# h) S- @0 `' b
See question.
/ x4 S+ v3 \ D4 ~) i+ xDecision:
& l/ Y9 ^, ?4 T' f# g. B4 dIn this situation the live parts of thermal cut out in the open position are considered as parts
2 U7 z0 p6 h# I; e6 Nof different polarity.
6 P" D8 Q4 {6 [/ d. c Y, N; eWhen measuring creepage and clearance, the distances should be checked according to the
( q6 @/ A+ G( k& H8 E& jcomponent standard. If the cut out does not operate for all the tests of all clauses, the
4 m" @+ z2 p; K8 W; C( vdistances are not measured because there is no open circuit and no parts of different polarity.
. Y" x0 b4 F6 U, T, @# ^/ K6 a9 G, w. t% |2 h6 _
/ c7 B& L3 ]7 @1 L0 c& L |
本帖子中包含更多资源
您需要 登录 才可以下载或查看，没有账号？注册安规
x
|
/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 2012-9-9 17:44
提升卡
置顶卡
沉默卡
喧嚣卡
变色卡
抢沙发
千斤顶
显身卡