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Standard: IEC 61558-1/1997
l6 a8 W8 }4 v- F- [A1/1998
s; x/ x6 F4 b1 t0 ^ wSub clause: 15.3.2" T0 j' [9 P) H) G
Sheet N°: 591/067 H; ~+ z* B7 h7 l
Page: 1 (1)
- Q% p1 ~, e Q1 x- _# qSubject: Short circuit and overload
" [- w7 {" R9 I) }protection
4 {* A4 d' V+ j, a8 cKey words:0 D+ r" u0 _ v' k$ W( t
- Fuse current
6 F1 |$ ~' f A2 {- Overloading test
- u K8 d- [/ N/ o- ?9 X- Overload current5 y- z- E0 ]/ n9 q9 ^
Meeting:# _8 N, P* @& w% k
Decision confirmed. e6 n2 x6 |3 _
at 44th CTL meeting
+ U [( Z, H" L' I& N1 nQuestion: During the overloading test on the transformer according to § 15.3.2 the$ d4 O A9 k2 N) B0 G9 h3 n4 Y
temperature of the windings and their resistance increase and consequently the
5 _6 C$ P1 P$ @/ G" |0 S Soverload current decreases. Has the fuse current be readjusted to the original+ l- T% [$ O2 m
overload current during the test or no adjustment has to be made?" ]: ^$ y# o2 [) ^
Decision: The fuse current has to be kept constant during the test.$ X0 r6 F7 i2 o/ G n
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