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标题: DSH 386 Overload of Transformers [打印本页]
作者: 小米    时间: 2012-11-6 17:20
标题: DSH 386 Overload of Transformers
DSH 386
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Overload of Transformers
6 b8 i, ~+ E8 Q1 Y. F1 v		5.4.3 (5.3.3) and App. C1# s9 w' ~: e# C2 L- j' d) Y
60950(ed.2) & 60950(ed.3)% N5 B1 b& E2 e' k4 u/ C

$ g* _' a' \# o; nStandard:9 y/ a2 U/ ]' T' S6 n% ^, W; q
IEC60950, 2nd (3rd) edition5 |; `5 b' n1 F0 J& ]* h
Sub clause:
  d, e" d8 t8 i# X. l5.4.3(5.3.3) and App. C1
( l5 o( G/ K1 l+ c4 j) r( v2 ZSheet n. 386
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Subject:1 a2 j$ ^6 ^4 @& U) `
Overload of Transformers2 j, i, r" d9 {7 n% l: n7 q
Key words:3 [4 B/ u& P8 @
-Transformers
; s% c" y, G# F$ h- j-Overload
4 y9 p% E0 _' `4 _, P0 c2 f8 eDecision confirmed+ m/ c( Y/ w/ f. D7 u
at CTL 38th meeting
! W% v, P6 s1 O4 L; M1 c( b0 J5 P& PQuestion:
( @9 l- k6 l3 w1 R8 a. vHow do you perform the overload test on a transformer used in a switched mode power
5 }5 G- @' l3 k' K1 y$ ]+ osupply? Do you agree with the following procedure?
9 z7 P* H) h' e( U& p8 F& mA power supply output-circuit shall be loaded with the worst normal load while overloading& q, e8 s& F) o/ ^
that secondary winding which supplies the output-circuit.
4 ]5 h+ \$ x; a/ W/ F- \, iDecision:
6 i1 Q( t' ~* Q2 _The load condition at the output of the switched mode power supply which causes the
5 W8 J  [8 m& S# `7 Fgreatest heating effect shall be used. The load is not likely to be a short circuit! q+ _9 B5 s, N  L3 T

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