DSH 314 Mains Transformers

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DSH 314

Mains Transformers

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61010-1(ed.1);am1;am2

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Standard:
- }  ~0 m2 F( V. T* I; sIEC 61010-
# [$ X5 C6 c0 k2 x3 y7 w4 U: @& v& J1:1990+A1:1992+A2:1995
9 z' D' w' A* X! G) _3 V0 fSub clause:
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1 g4 o2 w7 y* k5 ySheet n. 314
Page 1(1)
# {& J; z( u. A0 |5 i/ fSubject:
Mains transformers
! \+ j. q6 I- o8 l; h) ?0 iKey words:
- Isolation
! h7 h# W# v7 r$ o2 `  P- Transformer
Decision taken by
& ?! ?' w' O! n% k5 @2 x6 BETF3 and confirmed
by CTL at its 38th
meeting, in Toronto
Question:
3 z% n0 i/ W" ^: ]5 qWhat isolation and loading requirements are applied to auto transformers?
Decision
: r) |* s& @8 X2 V0 `- ^. d3 p) ^, lTests for loading are applied when applicable as for isolation transformers. No isolation
6 l0 D: a% Z2 E: X7 {) c: x7 Nrequirements are applied between voltage outlets, however, care must be taken to ensure that
circuits separated by voltages are suitably isolated form one another to prevent short circuit
of the intervening winding.
) u9 y: x) \) |+ a" h# LExplanation
8 w6 x! W. N* ZAuto transformers are subject to overheating tests in the same way as isolating transformers,
however, they are not designed to provide isolation and these requirements are, therefore, not
applicable as there is direct connection between circuits.


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