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发表于 2011-6-9 16:05
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仔细看Annex C 中的C.1 overload test, 9 E# a7 J7 ~1 ^0 m7 d; ^
C.1 Overload test% s- }, F' p6 r5 ~* C$ T
If the tests in this clause are conducted under simulated conditions on the bench, these. b' [# M9 W7 D: E! H _0 o6 t; T
conditions shall include any protection device that would protect the transformer in the
# `% v" Y: I M) ]' V. \0 f& Ycomplete equipment.
: q2 @7 c. p0 \1 k5 l$ G# N6 nTransformers for switch mode power supply units are tested in the complete power supply unit$ f+ N. f+ f; k; X% G
or in the complete equipment. Test loads are applied to the output of the power supply unit.* c2 B# [% S# @6 `, R
A linear transformer or a ferro-resonant transformer has each secondary winding loaded in! @( J9 X. p/ s. \
turn, with any other secondaries loaded between zero and their specified maxima to result in
9 `( z z* m9 Z2 Pthe maximum heating effect.
z' k# o' E; B: b9 ?* U8 tThe output of a switch mode power supply unit is loaded to result in the maximum heating2 ]! L: ~+ I; {
effect in the transformer.
2 f! |3 d- s# Y( t# z1 jNOTE For examples of loading to give the maximum heating effect, see Annex X.- |/ ^) m, v. F y. ^; ?
Where an overload cannot occur or is unlikely to create a hazard, the above tests are not$ B5 r$ ]' R7 k1 m9 y2 I* N$ i( {
made.
0 D. E5 r2 d# u, K) z* i7 H5 q( i最后这句话：Where an overload cannot occur or is unlikely to create a hazard, the above tests are not made.3 J) G3 Y+ u6 {9 q: x+ o
我觉得可以作为不用做过载的依据。 |
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发表于 2011-6-9 15:56
