DSH 513 Overload protection of transformers and associated circuits

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IEC60335试验指甲

DSH 513 : t2 o; K" G% t! ?) e6 u* v) L. k

Overload protection of transformers and associated circuits

17

60335-1(ed.3) 7 ^- v: c* M2 A) d

Question:
1) In case of transformer mounted on an appliance, shall the short-circuit on the secondary
winding always be carried out, if the transformer is not in compliance with specific standard
: I8 ?  f5 s+ H7 {/ P5 q(e.g. IEC 60742)?
2) If on the secondary winding a protection device like a fuse-link is connected, is it correct
5 N5 J7 V  v- `% T( m0 O; kto introduce the short-circuit after the protection device?
2 |: a' P2 V5 A3 wRationale:
See question.
Decision:
1) No, the notes 1 and 2 of clause 17 have to be considered.
8 `- s9 E" l6 j$ P, @2 {2) Yes, if between the winding and the protection device there is no possibility of a shortcircuit
to occur.

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