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|  PDSH 1022
- i0 a* m9 c) t4 l
% g! t0 U4 d% ]7 s | Short circuit and overload protection
/ F- X+ Q% f6 Q% V+ q4 p | 15.3.2
$ O( h6 C9 x8 z2 ^6 I* E# [ | 61558-1(ed.1);am1 & 61558-1(ed.2);am1/ a" e; ?3 W* C. R* R
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8 A$ l7 f$ c0 M/ }; w( u+ |4 |
Standard(s):( e& r8 h$ J7 g* B6 f
IEC 61558-1
) e2 P; C. M( rAll editions
# w- S2 D1 ~& `Subclause(s):2 N5 F' n* l1 Q# l) G3 q1 J! W
15.3.2! ]" ]" `2 K4 Q( |( v( ?
No. Year
# F& r/ {# L" O( P" ?9 V6 u; RPDSH# h" S" c( }/ ~
1022 2010
+ \/ M. W+ U, ?% XCategory: SAFE Developed by: ETF5
- t2 ?+ {! m( I; x3 n: IOSM/LUM
( F; ^% u* W# _- CSubject:( C* H2 g, F1 \' U! o
Short circuit and overload" }8 s( i* @: _& F
protection, K$ P2 I; n+ U( T& p1 W) s
Key words:# Y2 V9 ?6 y" Z" @# [
- Fuse current$ X& A0 y1 w. N& R- [# `/ {
- Overloading test
. L& w9 y' h5 v/ z y* F/ @: U8 G- Overload current% d6 R$ ^# {! n" O6 n0 t
To be approved at the 49th
6 }7 s" n3 M2 n" c8 jCTL Plenary Meeting, in 2012
) ]* |6 Q4 ~( _5 ?- zQuestion:
5 ~ [* w. T1 R& N5 k. eDuring the overloading test on the transformer according to § 15.3.2 the temperature of the windings and
. T: B+ Y7 ^* k; Y5 g" Q5 t6 ~their resistance increase and consequently the overload current decreases. Has the fuse current be
- f6 C: X5 f# z6 Dreadjusted to the original overload current during the test or no adjustment has to be made?
8 c t9 r) `$ o/ [5 o: rDecision:7 s* C0 c9 ]7 }4 x
The fuse current has to be kept constant during the test.- b ^$ v) P ^; i) L2 W
5 I# I7 J, @: n3 W% e0 I |
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