|
|
|  DSH 591/06
! |% s; I: `. H- n" J9 R
/ I2 ]; w6 a) x8 d% ] | Short circuit and overload protection0 t: t. O I/ r9 y( u
| 15.3.2" K; ~( U! L- Z& ^8 p5 Y s$ e$ C
| 61558-1(ed.1);am1
& T: D5 s# Y8 w6 n) ~ |
. Z% D/ L1 |" i3 a- e% b3 F
Standard: IEC 61558-1/1997
, ?) {* ^7 m; E+ `4 h4 wA1/1998
9 s3 w: o' A: j) K, e2 ^, cSub clause: 15.3.2
4 m9 d) ~1 O1 {0 |$ dSheet N°: 591/06
/ [' N% j! v2 APage: 1 (1)
$ ~! w( [0 H! a# sSubject: Short circuit and overload
0 H" z. w) s1 f/ qprotection
* @- j# e( l; v' r: t& kKey words:" @5 l" X& [2 d4 \- w7 b7 P6 W
- Fuse current2 f, B# G: \8 ?! Y, H+ D
- Overloading test
/ C0 ^. z- @# y3 @" b" L- Overload current, I) a# i6 [, [6 H% z$ b7 U
Meeting:8 p) J3 I5 f8 I- Z( A6 k
Decision confirmed
& W9 i( r. R$ ~/ X9 Oat 44th CTL meeting4 s: q: M* ]# }' M6 }
Question: During the overloading test on the transformer according to § 15.3.2 the
% u# t1 T7 P2 S$ i: Ptemperature of the windings and their resistance increase and consequently the
) C# o$ P4 v2 [7 u/ K$ a( P% @overload current decreases. Has the fuse current be readjusted to the original
2 F9 [' H l7 _1 b- toverload current during the test or no adjustment has to be made?
: { P* d) h# [* a( ~1 h& H; C. Y9 HDecision: The fuse current has to be kept constant during the test.
, K4 x, C) C( {+ B( K$ x# C* A2 x% U) g* y+ h) ?) i5 ?
% q, D* h' z6 }
|
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
|
/1 
|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 15:07
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