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Standard: IEC 61558-1/1997 ) k9 [0 q: U# B( X2 N2 |A1/1998 * J8 v4 i8 l1 w& c) J. }: FSub clause: 15.3.2 7 _5 s# N4 y- U ?; [Sheet N°: 591/06% R* S- O3 M' M3 E0 A8 H
Page: 1 (1) 9 D3 @+ a" z( G+ P$ LSubject: Short circuit and overload- L1 O' A4 o) [0 I
protection6 k. z/ h0 r, K- v, C3 k7 H0 R
Key words:% [+ S- c- j* u' u3 N+ g
- Fuse current 3 c% f8 K+ Q/ P1 ]7 U- Overloading test 5 q# _, K' [ d. m- Overload current- w3 h1 W4 t& }! X& q
Meeting: 8 W7 r: `' O% K( s6 E S$ Z5 xDecision confirmed ! v2 Y Y& q& r7 K2 w' V4 tat 44th CTL meeting ! z& B) L' ~. kQuestion: During the overloading test on the transformer according to § 15.3.2 the 9 a8 o' z* |/ V( e- ltemperature of the windings and their resistance increase and consequently the 4 k0 Y v& _) i" H% Foverload current decreases. Has the fuse current be readjusted to the original ! P+ Q* v" I7 Eoverload current during the test or no adjustment has to be made? 2 Y+ @9 k4 E6 F' zDecision: The fuse current has to be kept constant during the test.5 o6 Y: x5 a7 R; A ?& t, R
6 k- V B" x! `$ Z! z- q7 I[attach]77263[/attach]) D" L/ e% h9 R$ E! w
DSH 591/06