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|
|  DSH 386" B+ E: ~ S' B& V/ _" ]6 G! b
/ m9 L: d8 W/ v$ Z. F' b: x | Overload of Transformers1 D6 m& I1 M' L' L; p3 Q& w
| 5.4.3 (5.3.3) and App. C11 D N% A4 V7 h, T- f! Q
| 60950(ed.2) & 60950(ed.3)
# `: X' M3 X9 {! Y& _; R! {* r [ |
! ^. U6 H7 |0 T, v
Standard:1 M) I" O" o9 e3 K- F
IEC60950, 2nd (3rd) edition
' L2 ?' G0 Q' U8 z9 E2 N) k0 OSub clause:
, A+ o; L! u( `, Y5.4.3(5.3.3) and App. C1" Y6 s/ g6 d2 }, l' H
Sheet n. 386, Y& v5 m7 N0 \2 K
Page 1 (1)
7 `: _, m5 K0 ?# T! |' h* hSubject:
6 P' H1 B) m: y8 z% O1 [1 zOverload of Transformers1 e3 H; J( _& R( r' K
Key words:' w* O* M5 ]6 e
-Transformers9 g0 h3 t: M& o2 w4 m s. R5 d
-Overload
* f+ _2 P# p1 P g+ T& }: G5 fDecision confirmed
% U8 D# U. F) q2 ~1 Aat CTL 38th meeting
2 Q6 ^8 a/ |/ x- b( fQuestion:$ s" v) Q3 [; D2 Z( I. ~0 u
How do you perform the overload test on a transformer used in a switched mode power4 e% U$ n+ |$ A0 i* C& `
supply? Do you agree with the following procedure?
( h5 e& B* A0 r. _7 Y. bA power supply output-circuit shall be loaded with the worst normal load while overloading
9 N* s$ u5 _5 a- p) Q: xthat secondary winding which supplies the output-circuit.
% U4 V- q' q* c( N" iDecision:
$ y, _2 R0 r" ]2 q+ W# rThe load condition at the output of the switched mode power supply which causes the8 C6 a9 f4 X( J! o0 m2 w4 R
greatest heating effect shall be used. The load is not likely to be a short circuit* S0 t) F' A# z
% @; @! ?" X0 u( w e6 z" q
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