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|  DSH 386& b9 W T" x. ^! {; h
" F' \1 a* f) \% W# N
| Overload of Transformers
\8 y) ^5 ~; |( W | 5.4.3 (5.3.3) and App. C1' A e$ c( H6 E
| 60950(ed.2) & 60950(ed.3)
6 \. M: E3 x9 ~% P& n! m! Q |
5 ]" c; F+ f* Z/ g" rStandard:. U: O' @" U9 ~- z$ f7 b' a
IEC60950, 2nd (3rd) edition; a1 U/ `3 T" D" F( T7 E
Sub clause:
% @* q1 S Z* R# ~, N" j1 ~3 U A: N5.4.3(5.3.3) and App. C1$ ~2 k; e0 J' e' W/ o
Sheet n. 386
5 H$ j- l4 X. ?! ^& \( e; T7 i5 k+ T2 dPage 1 (1)6 ?. V" f- g2 S
Subject:
0 c6 e" {( h. e6 K6 w; m, IOverload of Transformers
! N6 J& m+ r% [: t7 \) ?, YKey words:- y& { ?1 {2 ?' R
-Transformers
2 l+ v' E: U% v q1 F-Overload
2 m: I% q4 f- n$ BDecision confirmed
( t4 Z% H" H. i' q( ?+ x+ Yat CTL 38th meeting
6 t, B. E/ y% U( B1 Y, YQuestion:
( P% {* ~$ o2 c( `How do you perform the overload test on a transformer used in a switched mode power# p) J& B: e1 F
supply? Do you agree with the following procedure?; F: u1 ^0 ~6 o& N9 L! z, `' n
A power supply output-circuit shall be loaded with the worst normal load while overloading- G2 B4 n/ u q/ h" q
that secondary winding which supplies the output-circuit.1 ]" a* J9 O) P3 O7 d7 Y( t3 v
Decision:
* c( W; h. A0 `: U+ W! sThe load condition at the output of the switched mode power supply which causes the
" M8 y( X) Y7 Ugreatest heating effect shall be used. The load is not likely to be a short circuit- i3 P5 U" J% @: N
4 `& M" `5 I k( q7 M8 @' l. [* G- q2 R5 C/ N
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