|
|
|  DSH 589/06: Z0 d4 ~& H; V9 R; k- t5 F
, V/ A2 l6 U, C
| Heat and fire protection
, R/ v m8 D# s& R( `( t6 ]4 | | 3.1.9.1, 3.1.11, 15.3, 15.5, 27.31 S# `6 T' g, M# O4 ^: ~
| 61558-1(ed.1);am1: ]. h+ l% s4 y* s* w5 S F: @: N
|
0 v( S& U) q. [ s; _" i4 iStandard: IEC 61558-1/1997
3 s- [* y$ l$ u" A6 W! V, cA1/1998
: j. f/ Z! e+ I( e1 uSub clause: 3.1.9.1
3 L! c o( W7 a3.1.11* }5 R. f3 n) Y6 ]
15.3 – 15.5 – 27.3& ? c1 p# n5 N3 ]
Sheet N°: 589/061 t; w: S, w$ U2 Y
Page: 1 (1)
2 _0 [7 t1 ]) xSubject: Heat and fire protection
4 S' @+ \! T3 T" ~0 Q4 w7 Y4 u5 VKey words:
& N$ C' y. [+ {/ I. H1 B6 w- Non-inherently short- R7 C; r" O" ? r9 k
circuit
7 y( D) u8 {3 }: }- Proof transformer- ?! S' H. f5 Z5 v1 _
- Fail-safe transform.' k7 Q$ L; Q5 A" g! ^. U
Meeting:
5 t. P) r6 t. fDecision confirmed* q" e) V7 D' s$ f& E* w
at 44th CTL meeting2 b: W) U z: P5 ^# h. w8 }; L) N
Question: Can a small built-in transformer with integrated thermal cut-out (not
9 j. p' [# J9 c/ a d2 o- s- \2 c& y7 Wreplaceable) be considered as non-inherently short circuit proof transformer3 R" v, S2 F+ T; j2 `% b
(3.1.9.1) and as fail-safe transformer (3.1.11)? If so, can the overload test be
; @& l7 t' T4 Z% s( adone according to 15.3 and 15.5? Both tests are to be performed on separate
" w6 o1 d; F2 `7 R' d7 Imodels.
7 P- l8 h( D% R9 J- PDecision: Yes, such transformers can be considered as fail-safe transformers if a thermal- ~5 H: j% f/ v" z0 U
link is used in the input circuit. It doesn’t matter whether the input circuit is5 [* {* ]+ I6 u4 o, g- Q; @$ `/ a# r& S
interrupted by the transformer itself or by a built-in thermal link that is not" ^" H5 }" l$ x T+ b( Q; d
replaceable.* ^( A O) t" Y$ U0 J% u
0 w+ N" ~( Q7 e% k' ^
) Y; t3 I3 l+ \0 `& W
; H1 C- n; K! y7 \3 B" ~! ~$ ]& B/ z; ^: s
|
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
|
|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
提升卡
置顶卡
沉默卡
喧嚣卡
变色卡
抢沙发
千斤顶
显身卡
