|
|
|  DSH 589/06
; }& z. w* u& ~* U9 |/ t
6 V% r) n7 Z, Y$ ^0 i4 U | Heat and fire protection. s2 c. v+ k, n1 t$ Z5 A; N) q* q% c
| 3.1.9.1, 3.1.11, 15.3, 15.5, 27.3* b3 ]: M2 e) @
| 61558-1(ed.1);am1' [3 z, e, f7 Q& w; K+ ?) U% a6 ?; z
|
0 j; v0 C, `9 ^9 A. h% m$ aStandard: IEC 61558-1/1997
' R) r E1 S$ Z4 P, ]" i9 bA1/1998( W$ m- U1 X- ~
Sub clause: 3.1.9.10 U6 e( ~9 O2 n: R: D q
3.1.11
6 w- \0 C8 O: D# x# d1 G15.3 – 15.5 – 27.3- _+ H4 w' Z0 }. [! B+ k) H
Sheet N°: 589/06
6 j$ a7 [; ^ \+ {6 L- V2 sPage: 1 (1)
4 i' R+ m- K' U; @2 x+ mSubject: Heat and fire protection
; {1 C: Q( T$ a7 UKey words:
5 e$ a* S. R* l3 e! ?- Non-inherently short7 O9 c( ~ I8 B+ ^5 q
circuit- p/ _6 ]6 G, I1 Y5 p5 F
- Proof transformer! n9 o! H& z7 D* j: |( L! W
- Fail-safe transform.! B6 A! C* p- p6 d0 k6 z' I
Meeting:
4 o& U4 ?: G% x" a' j# ADecision confirmed
; \6 T V' v+ O3 P# p( `2 h* M, qat 44th CTL meeting
& c& q* X3 J. |5 s) d! E! N' `Question: Can a small built-in transformer with integrated thermal cut-out (not
2 a5 w7 F# F. T( Nreplaceable) be considered as non-inherently short circuit proof transformer
2 s# |+ E, H! |4 g(3.1.9.1) and as fail-safe transformer (3.1.11)? If so, can the overload test be4 x6 c- Y. j) Q) ^6 P$ F9 m
done according to 15.3 and 15.5? Both tests are to be performed on separate7 h/ Q) w( F( U) j5 p
models.
( m9 d& \% o% JDecision: Yes, such transformers can be considered as fail-safe transformers if a thermal
s; W* \6 [3 Llink is used in the input circuit. It doesn’t matter whether the input circuit is/ T( g: b [, ]
interrupted by the transformer itself or by a built-in thermal link that is not U! l5 N/ Q$ Q
replaceable.0 g: f- r7 u5 X+ J
3 T& k9 q" ?% q% e$ b1 _( {
0 B. k' | h" s9 C3 o E" c! f. X: [
2 _, i5 Y7 M' {6 G
0 @& P; \" r+ R |
本帖子中包含更多资源
您需要 登录 才可以下载或查看，没有帐号？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 2012-11-8 15:11
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