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|
|  DSH 386/ J6 C2 l! J- `/ I. {* s9 }
4 t* E1 G! ]4 ?
| Overload of Transformers
% z* ^' ^/ g. |2 t) Z% g | 5.4.3 (5.3.3) and App. C1$ w1 e3 z1 {/ s+ l' M
| 60950(ed.2) & 60950(ed.3)
4 e0 l' L( G9 z |
" L: @: x. F& {0 J9 O7 t% A3 }Standard: f) \8 @; I" ~7 m0 a, w8 {
IEC60950, 2nd (3rd) edition1 G$ s7 r2 r0 _4 C
Sub clause:. {3 i( Z7 u4 l) S5 N9 k( v* B# Z
5.4.3(5.3.3) and App. C1% @+ D1 E2 j9 u/ p6 ~) `8 }
Sheet n. 386
r9 @4 N% Z% F q2 B! ]4 d0 I: xPage 1 (1)9 F# R+ e. A% j- d. J$ M( E
Subject:
7 v& o O" A3 ?; ]Overload of Transformers4 b" s/ D0 z ^) M
Key words:
( ]6 V! t! \9 [# [- _ H-Transformers1 {& @! D- `* o# k( M/ @1 E
-Overload; o7 Q# k$ J" [$ d
Decision confirmed
. E" N ~3 F0 G- l5 sat CTL 38th meeting
2 ~* R: t" T# f! Q/ T$ ]Question:
' D1 j/ s! N# `6 g0 n3 lHow do you perform the overload test on a transformer used in a switched mode power) v1 ^9 G% A+ ^, r" ^& [" l
supply? Do you agree with the following procedure?
5 T" U4 ]9 M1 m& c3 xA power supply output-circuit shall be loaded with the worst normal load while overloading
( [3 W9 z3 H$ @7 C( [3 ^) C' h# h4 vthat secondary winding which supplies the output-circuit.( x1 O. `, N- o" l( ?
Decision:- y4 C9 P) c- g% _. j+ Q e7 P) C
The load condition at the output of the switched mode power supply which causes the
( L8 U6 i2 G# I2 zgreatest heating effect shall be used. The load is not likely to be a short circuit
1 |8 F4 Z; b% ^$ g% ^! ]3 T
( [/ I1 X1 b) s
& x8 i9 w6 {5 k |
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发表于 2012-11-6 17:20
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