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|
|  DSH 386
- l( Y3 L0 f( `) E. [* X; f) V' [# @/ u5 M6 b/ V
| Overload of Transformers" R0 ?3 N. L( k6 K( Z
| 5.4.3 (5.3.3) and App. C1
5 Y; @3 _1 u t1 B" z6 d8 [8 D( u, m N | 60950(ed.2) & 60950(ed.3)
4 C$ q5 X5 p0 E) ?0 k, n+ N9 d) A8 m |
9 z( x8 b" E4 }
Standard: E8 d) B6 W2 p" s$ N
IEC60950, 2nd (3rd) edition
- o7 H/ \8 f+ w" S3 qSub clause:% v% ~+ {. d2 {0 n6 S+ [7 m
5.4.3(5.3.3) and App. C1
: C/ @* j, d. I$ h8 e4 L) r2 cSheet n. 3867 D" r: h& |% _ J! E; S, p
Page 1 (1)3 h3 P5 }. q% Y6 H
Subject:4 v8 R" w, _ m* I+ R/ R1 m5 H
Overload of Transformers3 h, |/ H2 U$ l, _
Key words:
3 _& ?+ H: q+ j, G+ I" c6 `-Transformers
: V: C. k9 F3 e ]# J" K3 J$ p-Overload4 A9 s6 c; P% Q9 c9 B5 u+ M% Q, B
Decision confirmed4 B- J7 E: T; W
at CTL 38th meeting) K" x; _, H" H% S
Question:. q/ @' D8 g6 C3 s# Q2 |6 i* n
How do you perform the overload test on a transformer used in a switched mode power/ S: P3 ?; I4 B5 d. U2 h
supply? Do you agree with the following procedure?
1 g! w- v) O7 |% X* H/ D. lA power supply output-circuit shall be loaded with the worst normal load while overloading
. A1 j# e' n8 U; B3 x2 b8 e- z( Nthat secondary winding which supplies the output-circuit.
3 G2 ?7 }; r8 y1 X. LDecision:
: v. m6 L6 @/ F% z' MThe load condition at the output of the switched mode power supply which causes the
9 l3 B' U' z. ]3 P5 r+ Y6 pgreatest heating effect shall be used. The load is not likely to be a short circuit7 j' H+ y- ]9 J" ?
% I+ W' ^* w5 ^
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