|
|
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, . J6 i8 @5 V; q9 |* L) ]9 q
C.1 Overload test& ^3 c u/ o5 i' a5 j
If the tests in this clause are conducted under simulated conditions on the bench, these
, p1 E' l# @/ ]conditions shall include any protection device that would protect the transformer in the
& q0 F! h( Z" W$ F/ [# w* O2 `3 scomplete equipment.: r" Q; b% ]0 t4 x+ u
Transformers for switch mode power supply units are tested in the complete power supply unit
* |/ T5 A7 C6 d/ d' \! u; x Lor in the complete equipment. Test loads are applied to the output of the power supply unit.
7 U3 @, R; k* ` S; hA linear transformer or a ferro-resonant transformer has each secondary winding loaded in& N: }5 M$ W* s3 g( r/ I. X
turn, with any other secondaries loaded between zero and their specified maxima to result in
5 h" ^1 O w: a( }( f% @the maximum heating effect.
/ H% z( j# x t( aThe output of a switch mode power supply unit is loaded to result in the maximum heating
0 F- r) O; o/ y) e) I0 Z% N$ v2 heffect in the transformer.# l- G4 P, [( r! j, j0 y* J
NOTE For examples of loading to give the maximum heating effect, see Annex X.0 J+ D6 ]$ {% c) \3 ]. q* E4 w
Where an overload cannot occur or is unlikely to create a hazard, the above tests are not
$ N* ] v/ x; L0 B# c6 g% u9 o# rmade.
9 U" U! V& ]8 R7 a* T( O( k最后这句话：Where an overload cannot occur or is unlikely to create a hazard, the above tests are not made.9 r5 `$ o& |# ?6 g' t1 A G* P& V
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