|
|
|  DSH 513
% k! r: y1 Y; |/ W
. _" |4 r+ s' L& [, } | Overload protection of transformers and associated circuits4 D: t [& c6 g, x0 s& [
| 173 ?3 Q$ D6 q Z5 W7 H5 Z2 k0 f
| 60335-1(ed.3)
) g+ F4 L3 G5 G |
/ s7 J/ Y# K# Z: t2 d$ N% MQuestion:+ g9 F9 |# b% i% O
1) In case of transformer mounted on an appliance, shall the short-circuit on the secondary
3 P; ], D4 I9 L- ^& A2 @winding always be carried out, if the transformer is not in compliance with specific standard6 P- O! h6 L: g2 \% C
(e.g. IEC 60742)?/ D$ \: I6 E) v; X
2) If on the secondary winding a protection device like a fuse-link is connected, is it correct9 Y4 s# w2 k: ?# v
to introduce the short-circuit after the protection device?, {. }- ~4 [3 S
Rationale:
6 G4 h- j: ^' x, h1 F+ x8 wSee question.
% X, i; O) `- i& [ D! UDecision:+ i0 B4 w. l1 ]9 t5 {
1) No, the notes 1 and 2 of clause 17 have to be considered.
* t# L( J+ }: D. e3 `" _2) Yes, if between the winding and the protection device there is no possibility of a shortcircuit
2 s# C7 C. Q! K% g5 a* A2 y: Vto occur. Q4 W2 K& N' K3 N6 ]" X4 B- C
# T/ A# c3 v4 F9 E1 [8 ]0 H3 a7 }3 h- Q A, l& d2 |
|
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 2012-9-9 16:50
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