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|  DSH 591/06
4 Q% C- A% U& z2 f2 s- A/ R0 H2 Y3 T& a( F- {
| Short circuit and overload protection
' q: _/ J9 F+ s' l2 M" X: K9 h | 15.3.2
9 V- P. h/ c8 ^+ l$ ~ | 61558-1(ed.1);am1
: [' l6 J7 j, U6 |! n5 ]8 v' J' I/ | |
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Standard: IEC 61558-1/1997
+ ~5 |! {/ n' t2 b" JA1/1998
' M6 E8 x( L9 z5 c5 b( NSub clause: 15.3.2 t S" w/ `, M& V0 ~) B( X
Sheet N°: 591/06
* u! _9 p, a- |) g' j1 F+ gPage: 1 (1)
* ]! K: z0 ?( _# T/ D6 U2 SSubject: Short circuit and overload" o) F1 r! U% N I+ [: \4 U
protection
; ?+ I/ C$ A7 c& C$ A5 YKey words:
4 F! i, d( g$ ~( K5 B- Fuse current8 }- c) l" d8 j
- Overloading test% i( S7 b: n5 g; a4 S* k; I% K
- Overload current
5 X) F. ]; r/ K- Y) p6 cMeeting:6 P1 W, X4 w- G. I2 Q7 J" ~
Decision confirmed
6 p% C" K$ [! j6 O; hat 44th CTL meeting
1 u9 p! m* b: s# R9 QQuestion: During the overloading test on the transformer according to § 15.3.2 the
& a8 z2 B! _ x% N& htemperature of the windings and their resistance increase and consequently the) _* h+ X% e' j
overload current decreases. Has the fuse current be readjusted to the original4 a# e3 B. @8 F4 K) y
overload current during the test or no adjustment has to be made?4 E: |: n6 l! ], h5 T
Decision: The fuse current has to be kept constant during the test.& g) [0 m& A k/ L. a) t
3 s Y+ ]0 [" K; L
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发表于 2012-11-8 15:07
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