|
|
|  DSH 589/069 ~4 S. w g* K$ k) w
' E( @: y0 T4 f1 C9 l" }
| Heat and fire protection$ |) X$ y) a: C" j; n4 h+ z8 s
| 3.1.9.1, 3.1.11, 15.3, 15.5, 27.3
6 k/ Y6 ^! |! j9 I" q8 ^ | 61558-1(ed.1);am1. P X3 l1 [, {- r5 V2 O" Z
|
5 h* D3 z7 T& xStandard: IEC 61558-1/1997
' o; w6 U4 a: TA1/1998
, A9 _ x! ?# _8 X0 `- {Sub clause: 3.1.9.1
, F& g9 P$ l, Q; N, R( n: k3.1.114 f3 [: Y1 Y" C8 e$ p
15.3 – 15.5 – 27.3) L9 @( a* Y K- C+ e8 R
Sheet N°: 589/06, E, Q/ P1 u' x! e) r# D2 B
Page: 1 (1)
. h) j& i) ~' T- T& b2 sSubject: Heat and fire protection8 W" a! K! {. M% a+ i$ \
Key words:$ a' p: }: E g) C3 q& d. B
- Non-inherently short
/ @; a2 f2 w: z5 gcircuit
( z# ~1 Y- D1 U( v- Proof transformer [ A% _- N( u6 j
- Fail-safe transform.: ~: B' V4 C+ h& E/ n( [2 k
Meeting:! I& K9 c, H, {: B* @% d
Decision confirmed
) j4 v& p! B3 C' K% iat 44th CTL meeting
. N M8 U. C+ j @Question: Can a small built-in transformer with integrated thermal cut-out (not8 e" _, i) X; _" K' @4 v$ I9 s
replaceable) be considered as non-inherently short circuit proof transformer6 p: n; u) E1 {! l1 J) W
(3.1.9.1) and as fail-safe transformer (3.1.11)? If so, can the overload test be$ P- C7 w1 d5 |# I) ?+ {* I
done according to 15.3 and 15.5? Both tests are to be performed on separate
+ b# C' K1 F: }. |0 Z. F7 f2 smodels.; _# n$ F- L$ Z3 q6 ]" R) {1 A8 Y! q% `
Decision: Yes, such transformers can be considered as fail-safe transformers if a thermal
, h) R& F! }- n" clink is used in the input circuit. It doesn’t matter whether the input circuit is) O& o/ z5 @: \: b
interrupted by the transformer itself or by a built-in thermal link that is not
$ W5 ~% A# j9 [! L3 N' kreplaceable." u8 d+ w4 _# g: i. }
# Y: T( @& o1 S4 l5 n
1 v* L) d- w5 B6 Z" b' ~
: Y0 Q" o7 U- T6 j8 E3 g5 |" H- F& s% [/ k; n6 s' T& b
|
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