Overload of Transformers ; C' a' \( s7 A8 {7 G& k9 T; H2 M8 D9 \
5.4.3 (5.3.3) and App. C13 l2 q5 O" n' ^8 m; ]/ T% | }
60950(ed.2) & 60950(ed.3)+ O9 o; ~: V9 e' S) r8 K/ F" M
6 t- B( n& V+ P. u3 G1 U/ AStandard:6 ^& H. y4 H9 H W% y: b6 ]% R
IEC60950, 2nd (3rd) edition 3 b5 w: T4 x' w4 G0 pSub clause:* o4 _: {3 U, ^0 v9 `/ V1 c1 I f# d3 a) C
5.4.3(5.3.3) and App. C1 ( X' B8 [. K0 g+ k5 JSheet n. 386/ p& n5 w, g4 e, v. Q6 ~
Page 1 (1): c5 \" a: _ L* s8 b9 ]" p( G$ d9 V
Subject: `$ n2 J: t5 F4 ^Overload of Transformers( v1 W# e x- p% u
Key words:. T# i( j3 ]* E% \
-Transformers% [% `8 `7 N; l8 g, k1 N
-Overload $ E6 Z$ i# b7 u$ jDecision confirmed- X7 v! e+ X: ?6 @) _
at CTL 38th meeting2 u {" B* R( e1 U$ S6 w+ K# s
Question:+ J. r3 h( V; m. d Y$ F; Z0 Y1 w; i1 ?
How do you perform the overload test on a transformer used in a switched mode power ) X4 {$ k( j3 ]4 `$ bsupply? Do you agree with the following procedure?) e( R6 p) E9 w, _! G" |
A power supply output-circuit shall be loaded with the worst normal load while overloading0 q' l2 I. D9 z& N) T
that secondary winding which supplies the output-circuit. ' m: V* N3 W& H$ }Decision: r' {/ s9 z3 N/ i! \! P* g. m4 nThe load condition at the output of the switched mode power supply which causes the& m: h' i+ ]! |" U
greatest heating effect shall be used. The load is not likely to be a short circuit6 b& J/ d2 u- e5 e
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[attach]77173[/attach]5 _( j" N/ _# E. ]. W h0 `
DSH 386