|
|
|  PDSH 1022, ?) n, P" m( g3 G" p9 _
3 r* ^+ l; x n" C; c/ I& Q
| Short circuit and overload protection
' E: F- I! q% |. _0 F/ M; N | 15.3.2$ v; K' P9 b7 Z- }1 x
| 61558-1(ed.1);am1 & 61558-1(ed.2);am1+ C& k1 {% J; w! \) E) f: `
|
( ~; Q, u+ m7 u) x# @) Z/ f0 s' }
Standard(s):
" t" D$ \* b, [2 V7 s8 CIEC 61558-15 W4 C! |5 J0 l0 z7 L! O
All editions$ p/ n2 A5 \" B% o! d
Subclause(s):* }: e" u9 f) C) X# z7 G; @6 x2 k
15.3.2& o. \5 k1 [5 p$ F
No. Year
# x; O3 c9 g7 E' f2 m& n# yPDSH
# F5 G3 T& u1 m0 K$ e: F1 f1022 2010
' {. P$ a1 s$ T1 f4 kCategory: SAFE Developed by: ETF5, e0 \7 P, c: L* ?9 ?
OSM/LUM) ?- n3 O% m' v" r7 l2 _" `5 x7 x$ U4 y
Subject:
5 Z0 I1 }# e1 f& D# f# E4 b/ cShort circuit and overload
+ a+ M+ G, c; N0 Xprotection7 J; {# M3 V4 M
Key words:
- I1 E7 c# K/ e9 J) Y- Fuse current
; w) W6 j0 l" I3 f0 Q7 V* r- Overloading test& h+ I+ s. F9 K ^
- Overload current
5 [" s$ K, B6 d* d4 ^$ G/ C" i0 gTo be approved at the 49th
5 B U; }6 O3 E. v+ g" wCTL Plenary Meeting, in 20124 r9 x. ~+ K5 Q- g
Question:
: m5 [/ [7 O$ TDuring the overloading test on the transformer according to § 15.3.2 the temperature of the windings and
7 F- ^+ B* J4 }their resistance increase and consequently the overload current decreases. Has the fuse current be4 e0 C8 G, W4 ]! F J
readjusted to the original overload current during the test or no adjustment has to be made?$ A& r; N2 K ^% V, \
Decision:
/ ]- f1 |3 i. D( ~# k, i1 i' `The fuse current has to be kept constant during the test.2 {1 ^+ X" R8 Y' _, t I3 n. t
$ L/ t- C7 S" T: i5 m8 D, N: \2 X
|
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
|
/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 15:15
提升卡
置顶卡
沉默卡
喧嚣卡
变色卡
抢沙发
千斤顶
显身卡