DSH 513 Overload protection of transformers and associated circuits

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广东安规检测
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DSH 513

Overload protection of transformers and associated circuits

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60335-1(ed.3) ; P1 |" a& F5 s  b2 a5 N* c/ q

Question:
' k+ N/ O$ n* {. j. J1) In case of transformer mounted on an appliance, shall the short-circuit on the secondary
! M4 d7 v0 G7 B3 D) z% hwinding always be carried out, if the transformer is not in compliance with specific standard
2 ?3 i% W% z" j, Y! G. X(e.g. IEC 60742)?
- Y4 d" ~! C9 D, [2) If on the secondary winding a protection device like a fuse-link is connected, is it correct
/ x/ [2 X9 m. g6 ?+ {0 i2 dto introduce the short-circuit after the protection device?
Rationale:
# x: j- L2 ?: P* S5 F) {' bSee question.
. G( I/ w" I/ C$ \+ n2 ~Decision:
, C6 U0 L5 m4 s: E; m1) No, the notes 1 and 2 of clause 17 have to be considered.
2) Yes, if between the winding and the protection device there is no possibility of a shortcircuit
  Y; j5 `$ _1 `5 t- z4 cto occur.
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