|
|
楼主 |
发表于 2011-6-9 16:05
|
显示全部楼层
仔细看Annex C 中的C.1 overload test, $ r8 p: O. v3 w u2 r
C.1 Overload test1 h, A4 K* J" q( H- E
If the tests in this clause are conducted under simulated conditions on the bench, these. r, ~5 ? _8 R' `0 B$ M7 a2 ]+ f
conditions shall include any protection device that would protect the transformer in the
/ d( f J' N0 G& n% e8 Acomplete equipment.% F8 u* N5 h& U& M
Transformers for switch mode power supply units are tested in the complete power supply unit2 F) z# |/ C( x4 M, f5 P- u' z
or in the complete equipment. Test loads are applied to the output of the power supply unit.
( w [3 m/ x% c1 p% xA linear transformer or a ferro-resonant transformer has each secondary winding loaded in% w# b+ y* u# k! M
turn, with any other secondaries loaded between zero and their specified maxima to result in- M; N$ c+ [/ _1 M- }
the maximum heating effect.* p" m" J9 G: |( C
The output of a switch mode power supply unit is loaded to result in the maximum heating2 ?! X* d5 o# x) f
effect in the transformer.. |" L" l' H# h4 `/ F
NOTE For examples of loading to give the maximum heating effect, see Annex X.; L" A2 _8 @5 W; m4 e% G' i
Where an overload cannot occur or is unlikely to create a hazard, the above tests are not1 a+ x, [& g: O# g2 ]
made.
# H: I8 h' A2 x$ R& h8 e, z9 g最后这句话：Where an overload cannot occur or is unlikely to create a hazard, the above tests are not made.
) q: g9 e$ |( ]我觉得可以作为不用做过载的依据。 |
|
|关于安规|小黑屋|安规QQ群|Archiver|手机版|安规网
( 粤ICP13023453-10 )
窥视卡
雷达卡
显身卡
发表于 2011-6-9 15:56