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17 Overload protection of transformers and associated circuits5 h) d# C4 e- D" E, {1 c0 A
Appliances incorporating circuits supplied from a transformer shall be constructed so that in( n: x8 n. p0 |. h9 x1 L0 R% \
the event of short circuits which are likely to occur in normal use, excessive temperatures do
* I& u7 k F% T8 U4 ~not occur in the transformer or in the circuits associated with the transformer.
, ?( q" s; f/ K2 MNOTE Examples are the short-circuiting of bare or inadequately insulated conductors of accessible circuits
0 D, a$ A0 x; v7 noperating at safety extra-low voltage." ?+ D2 K- o' ?# x% }
Compliance is checked by applying the most unfavourable short circuit or overload which is
% i. F0 g' X6 s6 H3 L" R: flikely to occur in normal use, the appliance being supplied with 1,06 times or 0,94 times rated6 V' Z- I8 |1 ], J8 b
voltage, whichever is the more unfavourable. Basic insulation is not short circuited.
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特殊标准好像有补充 |
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