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+ B' Y8 v3 r4 x* O
. M0 c$ X7 A' P# i: ?( Y | Mains Transformers9 s( ?( _) g4 `
| 14.7
9 k* ^7 W0 F/ A2 B | 61010-1(ed.1);am1;am2
) I: e" Z" D( Y5 ?2 g+ G! n |
+ `" o8 O; j+ B* {+ D9 P2 v( l: A
- j$ Q$ {. _ K: M5 N7 jStandard:
( j# z" c. D6 VIEC 61010-6 z. v2 s, U8 w; L. I# g: }4 t
1:1990+A1:1992+A2:1995) E u6 O( c) F8 i, s7 r
Sub clause:& y$ p' ?6 g0 {, c
14.79 l8 b" X6 _- A7 _) s0 j7 M# G/ k
Sheet n. 3143 F0 t. V) B ?/ q9 r( {" b% W/ O
Page 1(1)6 }0 u9 P" [, o( v+ Z
Subject:
0 t1 b; s# o' Z* F9 `5 e1 pMains transformers0 {. m8 i7 c$ g1 u8 |, D
Key words:
7 w% Y; H& f( U4 i* n% N( d8 ~- Isolation
/ D% B5 g1 r# W8 p; T- Transformer
. K4 r( S; J& \ ~Decision taken by
+ X: h+ [3 L/ eETF3 and confirmed$ j* g0 q6 M- Z6 e
by CTL at its 38th
; p4 s. K! |/ {& \9 ^; hmeeting, in Toronto% r1 L" X) U# t/ Z
Question:
; G, t% u. n6 @: SWhat isolation and loading requirements are applied to auto transformers?, P$ j$ x1 O/ M4 z: n- ~3 Z2 R z
Decision
8 `2 c+ \; j) \- t; K* nTests for loading are applied when applicable as for isolation transformers. No isolation
# y, O& p5 G* _, j' j9 }8 lrequirements are applied between voltage outlets, however, care must be taken to ensure that6 S& {! a7 U% v6 a% y
circuits separated by voltages are suitably isolated form one another to prevent short circuit8 Z$ H4 E# ], C+ J. a( N8 p
of the intervening winding.# b* w- W$ g5 b G
Explanation
' e. J/ f. |9 P* D$ t3 {+ RAuto transformers are subject to overheating tests in the same way as isolating transformers,4 q: C# h" l3 i. o* r
however, they are not designed to provide isolation and these requirements are, therefore, not z4 ]3 w- y6 h o- h+ n
applicable as there is direct connection between circuits.
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7 L7 H( G4 c( I3 ^* V9 T
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发表于 2012-9-19 14:40
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