|
仔细看Annex C 中的C.1 overload test, 3 v! F5 f7 A% r' g
C.1 Overload test& s8 `8 _" Z& z0 S6 D/ B
If the tests in this clause are conducted under simulated conditions on the bench, these
" C) r) m% j! v- H$ a v% @conditions shall include any protection device that would protect the transformer in the* d( j9 ?" }9 M& v5 ]5 X: m% p
complete equipment.
2 q* I; B+ p" g$ h5 W iTransformers for switch mode power supply units are tested in the complete power supply unit
2 E" n0 z- F1 [4 i: y tor in the complete equipment. Test loads are applied to the output of the power supply unit.
( H+ s8 @8 d" g9 AA linear transformer or a ferro-resonant transformer has each secondary winding loaded in
) L$ y" A% l, v/ z8 l; D( T7 @turn, with any other secondaries loaded between zero and their specified maxima to result in
( P: j' B1 t% L. ^) S/ [2 athe maximum heating effect.
% g2 y( q3 D* SThe output of a switch mode power supply unit is loaded to result in the maximum heating6 k+ @$ z$ b% `) q& u
effect in the transformer.
; }; K* f! e# J: d" {NOTE For examples of loading to give the maximum heating effect, see Annex X.
6 n5 ^/ O; A* u8 ~9 O+ MWhere an overload cannot occur or is unlikely to create a hazard, the above tests are not- m# U# \4 b: {. f
made.* q ], s X/ o" @5 \ W, k" H% P
最后这句话:Where an overload cannot occur or is unlikely to create a hazard, the above tests are not made.$ ?0 u [, v3 j" W+ g$ I5 @; P
我觉得可以作为不用做过载的依据。 |
|