IEC 60740-1 Ed. 1.0 b:2005

Current Revision
Laminations for transformers and inductors - Part 1: Mechanical and electrical characteristics

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Laminations for transformers and inductors - Part 1: Mechanical and electrical characteristics

PUBLISH DATE 2005
PAGES 66

Laminations for transformers and inductors - Part 1: Mechanical and electrical characteristics

IEC 60740-1:2005 specifies the characteristics of laminations. Their preferred use is cores for transformers and inductors. The laminations are made of sheets and strips of magnetic materials, specified in IEC 60404-8-4 and IEC 60404-8-7.

The main changes are listed below:

  • a) ranges with lamination strips YS, YSUI 1, YSUI 2 and laminations YEE 2-..L added;
  • b) range YEI 1 extended at the above end;
  • c) ranges YED 2, YEF 2, YEL 2, YES 2, Type YM 1-5a and YM 1-7a cancelled;
  • d) national designations cancelled;
  • e) electrical characteristics for the laminations specified;
  • f) mechanical characteristics for laminations added;
  • g) holes added for lamination types YEI 1, YUI 1, YUI 2, YM 1;
  • h) in Annex A, a conversion of the polarisation J and the field strength H in a specific total apparent power is defined. For the characteristics of the reactive power and the power loss, equations and constants are specified.
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