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* I* X+ Q0 U' R+ @6 O' X2 i0 |6 p* }& x" V3 q* u
| Mains Transformers
G+ X0 ^' P1 V, J, j6 C | 14.7+ g* c. W7 F- S7 k( ~. V0 _
| 61010-1(ed.1);am1;am2% m j& z& r" r9 H8 S: o* z) C
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! ~+ Y( j+ M y, n$ [: XStandard:" A5 q: `) H2 f* O% U5 h M
IEC 61010-
& r8 O! Z8 F6 Z1:1990+A1:1992+A2:1995) O5 r1 G/ S# v% n- B
Sub clause:% J! o* H1 Z) |# P
14.7
0 B- H$ j9 `, E: }, q/ I5 jSheet n. 314
1 _1 \. P* }! r9 b; qPage 1(1)1 ~3 _9 q; V" }. k0 b; n" w
Subject:
. P& [( u2 t8 G6 HMains transformers
0 e9 k' T* A- s: {Key words:, B0 k" d O! A. U
- Isolation
) Q+ L% N& q7 ` t- Transformer, {# m% J4 k" e3 |: e
Decision taken by% v" X) p0 F }) e
ETF3 and confirmed
7 E. i* |0 y3 P2 q% ~7 Lby CTL at its 38th
6 n6 G: A1 u- ?% l0 G! |; n( Kmeeting, in Toronto
( _& O* f& E8 ^; @ kQuestion:0 b9 _ J4 b0 o$ z
What isolation and loading requirements are applied to auto transformers?* v4 ?# h" A; z# l( ~ F( U8 {6 _
Decision
7 L. Z! _$ r V, uTests for loading are applied when applicable as for isolation transformers. No isolation- p% n7 G- x- H! h9 z9 m4 C
requirements are applied between voltage outlets, however, care must be taken to ensure that# }( E1 c' d2 T
circuits separated by voltages are suitably isolated form one another to prevent short circuit2 Z/ Y1 @; X% Q1 J7 J$ O3 `8 |
of the intervening winding.
& L# e+ a6 G5 R5 oExplanation
! h z+ ~1 _3 T. \1 I# f' C4 zAuto transformers are subject to overheating tests in the same way as isolating transformers,
4 |+ \+ A8 s0 C H+ }9 lhowever, they are not designed to provide isolation and these requirements are, therefore, not4 {" n% |3 E# O' D- G
applicable as there is direct connection between circuits.; f1 W) Q5 Y* F# S8 C- W6 z; P1 ?
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发表于 2012-9-19 14:40
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