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| Mains Transformers
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| 61010-1(ed.1);am1;am23 j+ l! V$ P" T. H. L
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; j; h( b+ P' Y3 r" WStandard:( H- P% B8 U$ u g! i. q/ r
IEC 61010-
0 j# v" f) S( ?5 _/ m/ o' m4 ^4 m* O1:1990+A1:1992+A2:1995+ o7 B+ y. T; ~: Z
Sub clause:* ^: }# ^; o4 d& _( X( C( x
14.7
2 g+ y: d b) X# ?* g8 h; wSheet n. 314: N, a( N$ g& L
Page 1(1)
' \: M! E, n1 f' NSubject: [, m0 e! R+ j9 o6 m/ O
Mains transformers8 `0 v) j$ z3 h% i% @5 a5 E' v
Key words:. A) p$ Z5 i _
- Isolation0 K/ y/ L" F* |" \* a* H6 H7 S- ?
- Transformer$ }* `6 J- Z' _5 u2 q
Decision taken by
/ E: m- z& S4 z4 o* vETF3 and confirmed y- {, ]8 ?2 s1 l' g2 i5 }
by CTL at its 38th1 _' N" ^1 W) V! H! e; ~
meeting, in Toronto" f0 U9 i& ~6 {$ x
Question:5 ?7 _1 {& X6 K1 k9 \% H3 s1 m
What isolation and loading requirements are applied to auto transformers?
( `3 {1 n+ G, Y5 H6 S! o. x1 o5 cDecision" K H9 m) M9 `6 q8 f
Tests for loading are applied when applicable as for isolation transformers. No isolation; u( {; i- f% G5 }$ @
requirements are applied between voltage outlets, however, care must be taken to ensure that
( ?1 N, X+ F0 T! [1 } V ncircuits separated by voltages are suitably isolated form one another to prevent short circuit3 Q$ K# l+ @6 ]& F. Q3 A4 [
of the intervening winding.
0 x- o5 e4 t! WExplanation
# _0 B8 L; Q0 W3 q$ yAuto transformers are subject to overheating tests in the same way as isolating transformers,, f# f% W9 H' d) o& \1 e% B4 [
however, they are not designed to provide isolation and these requirements are, therefore, not3 b! A1 g* o# Z9 g7 {6 @/ }
applicable as there is direct connection between circuits.) {# A d9 U" P# z% Q" N- ^; ~
( i3 D( r7 B3 F4 D2 ^8 a- _5 M- A4 B* d; F5 _* t h7 J
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