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6 b" M; N0 q1 i! t+ j3 O- c
Standard:
% Q& e- M, ]8 ?+ {6 RIEC60950, 2nd (3rd) edition
, ~' ]/ n- n6 S0 O4 X' t- U8 rSub clause:" p) V9 |" f& o+ S; ^
5.4.3(5.3.3) and App. C1
) E: ~( a7 r( m* W6 L( R( ISheet n. 3867 F& H9 v+ J. c
Page 1 (1)3 o$ ^6 L: i; l$ T/ c
Subject:5 ` Y4 H6 u1 s1 B, W
Overload of Transformers# b* n7 J8 A# T' C: x# D/ w
Key words:5 P$ ?# R% s. F4 f
-Transformers! e* K' v8 P9 [" G, z
-Overload
% h( w/ i( z% r R" ~Decision confirmed
: r* G5 w) e/ w7 Uat CTL 38th meeting
& D8 |. L; w! ~! I% GQuestion:+ o, l5 Q; Y, T* a8 f3 S7 ^: C" f' E
How do you perform the overload test on a transformer used in a switched mode power# O @5 \0 h, Y- w" e4 E6 H
supply? Do you agree with the following procedure?: {/ g6 ~( q# X/ ?
A power supply output-circuit shall be loaded with the worst normal load while overloading( q% x7 |6 @ D; e
that secondary winding which supplies the output-circuit." g! \" Z* y* a' M8 S9 ]1 Z
Decision:: ^- A/ z5 J. ]0 Q/ ^8 H
The load condition at the output of the switched mode power supply which causes the% {; y1 r% d. Z9 ~: W& S
greatest heating effect shall be used. The load is not likely to be a short circuit) |4 W1 \1 Z0 n/ a' N5 w
8 \3 x& f4 D' j4 ^$ K1 E; g
7 O( A. }8 I, q) V |
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发表于 2012-11-6 17:20
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