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& q# H. n3 W1 _2 b: } | Mains Transformers4 R4 T" p/ e Q1 c* G+ S
| 14.70 y) {2 T; O9 H$ y) A' S
| 61010-1(ed.1);am1;am27 n. o2 l/ b. o3 \
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Standard:
/ Z' \. o: X7 e' H1 h9 lIEC 61010-/ \/ E* D- a2 E" V
1:1990+A1:1992+A2:19956 y( z- m) \1 G. t9 E) ~
Sub clause:) X1 @8 O9 f. U N6 K9 S* d/ p; q
14.72 K U) ]" T$ b. i7 z6 i: I
Sheet n. 314; E1 b1 V' a( j
Page 1(1)
6 W1 ~3 Z9 s, _! ^% y# ^: w3 Z1 uSubject:2 A: W% m4 b" N6 ~6 F
Mains transformers
! F# w$ Q' e3 k. {' SKey words:
: ^' [1 A6 m1 f0 y- Isolation
- M8 t4 V5 x9 u1 ?2 k$ W" [- Transformer
; N* A* X& _; x- `Decision taken by+ Q/ H+ M5 m& q+ }
ETF3 and confirmed$ ^+ D: u# a* s% y
by CTL at its 38th0 Q) I; k9 W% m, I: \
meeting, in Toronto
* H$ X7 p# a# ^1 d2 l qQuestion:/ w! ~# W+ u' }" G- }# O
What isolation and loading requirements are applied to auto transformers?
/ d; ~# r( y9 m" @; N/ O7 c: U/ pDecision( `4 Y* Z: J% T, K3 O
Tests for loading are applied when applicable as for isolation transformers. No isolation
" ?# W3 U. q; v9 }1 ]3 o3 xrequirements are applied between voltage outlets, however, care must be taken to ensure that
/ G. V3 ?- Q- m+ Z3 kcircuits separated by voltages are suitably isolated form one another to prevent short circuit
3 J9 t, N( ~9 a# z mof the intervening winding.# B; h5 ^% @0 z7 E0 }
Explanation
0 m8 v* G! z" b0 F- H7 {; R1 H9 @: IAuto transformers are subject to overheating tests in the same way as isolating transformers,% }) `" ~- w; j _# r. ^( u4 `9 k
however, they are not designed to provide isolation and these requirements are, therefore, not
( ]3 y9 _9 v8 Iapplicable as there is direct connection between circuits.
X4 S9 |" F. m6 S) g7 N$ ]% {( U4 n* S A, \6 A# l5 r& I
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