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|  DSH 591/06
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, G I" F7 s) g+ G1 E | Short circuit and overload protection
; I* X, B3 X" }2 o! k$ _- L) P' r | 15.3.2" m9 `% c+ P" u0 e% ~
| 61558-1(ed.1);am1
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Standard: IEC 61558-1/1997
/ d9 l" }* [4 `A1/1998
& K+ [4 n" a8 ` u$ MSub clause: 15.3.2$ D" @$ U+ m) a/ {1 O2 f6 O5 a
Sheet N°: 591/06
$ M% o3 L7 c9 g5 T( M3 U+ kPage: 1 (1)
6 { o9 a3 i; y0 ESubject: Short circuit and overload' q; u& u: N4 q8 }: `- u* q* ]; R* b; u
protection b8 n& u4 h3 O3 N
Key words:( w: d/ V5 h( i2 a3 S) ]% @
- Fuse current
. X/ j! N5 u+ _! j' l( @- Overloading test! U. b9 ]. x9 T, E
- Overload current" j- E' p; s3 M" A
Meeting:
4 p( q$ o- M$ @' A3 RDecision confirmed
$ \, W6 d& z( D' T" ^at 44th CTL meeting3 Y6 c# u0 o" W; [' j# [/ o2 q
Question: During the overloading test on the transformer according to § 15.3.2 the! J |& m, i4 [5 A
temperature of the windings and their resistance increase and consequently the
6 i& n4 S, B" r- d$ j- c6 }( Koverload current decreases. Has the fuse current be readjusted to the original2 \; Z' X; @' B* [' i* x
overload current during the test or no adjustment has to be made?% L2 t2 t6 }+ r
Decision: The fuse current has to be kept constant during the test.
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发表于 2012-11-8 15:07
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