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Standard: IEC 61558-1/19975 A) |( G& C4 p5 Q2 U, W( B
A1/1998! p% t) |- P/ u6 F( o9 k
Sub clause: 15.3.25 J/ N* q2 G/ e+ N
Sheet N°: 591/067 V6 b n" H' ~8 S7 E
Page: 1 (1)5 j" ?0 v- i( \( q: R
Subject: Short circuit and overload
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Key words:
" a5 [9 d: {1 p% d9 H# F( z- Fuse current* k* [: ?" l2 I3 Y% a) o+ Z* Y
- Overloading test
3 [, b) \. ?- J! [$ f" X" S P- Overload current
5 R$ t# w+ h! ~9 A1 U6 l8 V5 RMeeting:
2 x( ]( W5 p& p. F* _" S6 HDecision confirmed3 o/ {: ]$ O( C7 z/ Z: ?6 m4 K
at 44th CTL meeting
( O" y+ d6 o; p3 s4 ?3 J! G7 O3 ?Question: During the overloading test on the transformer according to § 15.3.2 the9 O# _2 z8 a3 F0 d$ {
temperature of the windings and their resistance increase and consequently the) k; U2 Q( l6 e6 n9 E6 ?/ j
overload current decreases. Has the fuse current be readjusted to the original5 B4 Z6 ^2 u4 T
overload current during the test or no adjustment has to be made?
& ?, O4 O: D3 E# fDecision: The fuse current has to be kept constant during the test.
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