|
|
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,
! o7 @ k* E% L: T3 dC.1 Overload test2 Q, ]5 ~ O" ?+ [1 O
If the tests in this clause are conducted under simulated conditions on the bench, these
% m# Q8 p" O* ^3 tconditions shall include any protection device that would protect the transformer in the
0 _) F. ~; T( }. n& @: \6 n" i# e( U: n. Fcomplete equipment.- J( j/ ~, j6 ^
Transformers for switch mode power supply units are tested in the complete power supply unit2 G2 ?; F s) Y# \: ]4 }
or in the complete equipment. Test loads are applied to the output of the power supply unit.
4 W! W9 O9 L8 U3 |$ k% |6 qA linear transformer or a ferro-resonant transformer has each secondary winding loaded in
7 I* a( E* k Y, _1 Cturn, with any other secondaries loaded between zero and their specified maxima to result in
* F: k1 F: ^3 Y" |! c3 ? zthe maximum heating effect.
N6 o( W0 U9 k* P8 mThe output of a switch mode power supply unit is loaded to result in the maximum heating
' U6 x, {' y1 V: |effect in the transformer.
$ h4 |* b' ?1 S( TNOTE For examples of loading to give the maximum heating effect, see Annex X.
- w3 {( `. w5 rWhere an overload cannot occur or is unlikely to create a hazard, the above tests are not
2 r# A% R: z( cmade.: c2 L3 ?8 ~6 a
最后这句话：Where an overload cannot occur or is unlikely to create a hazard, the above tests are not made.4 D) Y6 W) p$ ~ X
我觉得可以作为不用做过载的依据。 |
|
/1 
|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
