|
|
|  DSH 513
) _2 z9 W6 w5 M$ {) A9 b6 c
' o$ j( ?3 [1 L" c/ n | Overload protection of transformers and associated circuits+ ]* S3 W$ k& d8 R4 t; a; W
| 17
( @, W" r& U' n5 i* ]0 Y! V) d" H6 D | 60335-1(ed.3)
4 Q9 k/ V1 d, X& u5 F4 Z( C |
6 _) N" r& \" X9 m) O" `
Question:
- G6 j6 e3 v0 g1 ~1) In case of transformer mounted on an appliance, shall the short-circuit on the secondary
3 |0 o5 u& I- n# owinding always be carried out, if the transformer is not in compliance with specific standard
4 D1 q4 z: u7 X1 h% W m- u(e.g. IEC 60742)?0 g5 s+ O& R7 q& _
2) If on the secondary winding a protection device like a fuse-link is connected, is it correct
- a6 Q! H; V4 H+ s& a8 _to introduce the short-circuit after the protection device? {2 c, D+ A k* a
Rationale:
/ A8 E H% d |2 O) a5 E0 aSee question.
! J; [7 i0 z7 gDecision:
0 S2 X/ O5 F5 l$ K4 T1) No, the notes 1 and 2 of clause 17 have to be considered.
. K! }& w0 _ s( A9 p& Q9 {8 g! x2) Yes, if between the winding and the protection device there is no possibility of a shortcircuit4 Q" F6 Y7 R- o1 o. R
to occur.1 d0 y. |9 V6 \4 m- m
6 W3 x9 {( S" ?( Z( f
( G. ^$ M/ n* m$ i7 B8 S. r: c
|
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 16:50
提升卡
置顶卡
沉默卡
喧嚣卡
变色卡
抢沙发
千斤顶
显身卡