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|  PDSH 1022
- v" n8 J& y& A) Y, {: e& y
/ F' X. `7 u# o4 @+ d/ D' p | Short circuit and overload protection. w) I" `4 Y( ^6 a/ e2 A: T$ Y
| 15.3.2
9 @& f; B" I; C$ w& |# I2 U | 61558-1(ed.1);am1 & 61558-1(ed.2);am1& |+ ?' o# p3 _$ e0 j! U
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Standard(s):
( \4 r' X: i; \IEC 61558-1
0 N6 ] K0 C5 S0 Y& pAll editions& l2 m5 [) j0 ]% m ]. ^' M
Subclause(s):
3 Z: n$ e+ O7 [& w. X' w- \4 t15.3.2
4 T7 O7 ?6 [ o6 N J3 ~No. Year) l# T- V$ g2 E6 k
PDSH
! d5 V3 x. f6 u# ~6 `: ]1022 2010
# b% p* L6 j% W0 ?2 q* yCategory: SAFE Developed by: ETF5
+ n0 @0 B' J/ a# t5 ROSM/LUM% Y; l* V+ Q$ X; D3 D
Subject:" K- I6 @) y1 |! q
Short circuit and overload
3 v. u- k- U1 _+ @# R5 Zprotection3 {# c6 @8 m9 j: p; |) q( D
Key words:
! V, v( d: w! q- Fuse current
6 |$ U! W2 _" N# r: i- Overloading test {2 U& Z& {0 n F+ V
- Overload current n4 }6 f9 p, C& ? d$ G( ?8 a
To be approved at the 49th
* D a7 p4 L. jCTL Plenary Meeting, in 2012: @7 a7 ~* t( V$ r: f# N
Question:
- A6 @* k+ A+ p# d+ a2 i3 VDuring the overloading test on the transformer according to § 15.3.2 the temperature of the windings and
0 T- p+ }4 J9 R8 F" |6 t9 H; j9 H# ]their resistance increase and consequently the overload current decreases. Has the fuse current be
l! S% o3 v9 A% O7 |readjusted to the original overload current during the test or no adjustment has to be made?/ f3 R: E% \; ^0 y2 S) f/ `9 O
Decision:
1 ?) t% p {6 q, |$ H( eThe fuse current has to be kept constant during the test./ `) @1 _# o& j7 G9 c+ O& n
! Z+ R- P! m& W* Z+ C
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发表于 2012-11-8 15:15
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