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|  DSH 386- w4 a& F& n2 {5 M6 C
, a5 u R. c# a& |3 _4 u
| Overload of Transformers ^" r4 \: e W
| 5.4.3 (5.3.3) and App. C1
6 m. L1 L6 O5 ~6 b! K | 60950(ed.2) & 60950(ed.3)8 n1 q2 S1 C% J F, T
|
6 e+ a# N: |& q7 r7 q+ M% g: {
Standard:
# b) e" d% N" w1 A1 @, DIEC60950, 2nd (3rd) edition1 F& \% y: B) ^: D, D! y* Z! _/ i( O
Sub clause:
0 @5 _9 }( ]4 S& u9 F: d5.4.3(5.3.3) and App. C10 s0 U/ X$ R+ n2 g3 N# \
Sheet n. 386. v C; @" O( F# [/ q
Page 1 (1)
6 p$ w4 Z; n6 B3 D0 [+ a& q3 @Subject:
: P6 i, i* c5 R5 u* {Overload of Transformers
% H" W; e6 m; c1 I/ G% VKey words:
d! H' w$ u9 h/ }7 n-Transformers
, o& L! R, z' r8 Z-Overload
w9 g/ P% I" _: t; oDecision confirmed
' s, x8 g( { Q+ Q- O" L% H- Mat CTL 38th meeting: d$ X _9 Q1 I% K8 j v: R
Question:" F' U) ^- ^1 ` g. ~$ E
How do you perform the overload test on a transformer used in a switched mode power
1 o& T2 x. P% G, {/ w7 dsupply? Do you agree with the following procedure?
! Z7 G3 w# S# B8 R; `A power supply output-circuit shall be loaded with the worst normal load while overloading! M5 ^( u7 | e& s6 |" {) [
that secondary winding which supplies the output-circuit.$ [9 f+ k8 Y s- X" k
Decision:' I3 S5 X! n j* n6 G9 K6 p
The load condition at the output of the switched mode power supply which causes the
" X! O2 x8 m2 L3 d/ ~greatest heating effect shall be used. The load is not likely to be a short circuit
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发表于 2012-11-6 17:20
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