Introduction to IEC 61439

Introduction to IEC 61439 - A new standard on Switchgear and Controlgear Assemblies (photo by ba-online.info)

Introduction

IEC 60439, the standard for low-voltage switchgear and controlgear assemblies, was under restructuring from the last decade. The new series of IEC 61439 standards were published in January 2009. This standard has brought considerable clarity in technical interpretation.

The new standard follows the philosophy of IEC 60947 series i.e. IEC 61439-1 is ‘General Rules’ standard to be referred to by subsidiary product parts of IEC 61439 series.

The IEC 60439 standards were ambiguous about how to assess compliance of partially type tested assemblies. As a result manufacturers and testing bodies often treated partially type-tested assemblies differently.

One of the main features of IEC 61439-1 is that the discrimination between Type Tested Assemblies (TTA) and Partially Type Tested Assemblies (PTTA) has been eliminated by the verification approach.

The three different but equivalent types of verification methods are introduced and these are:

  1. Verification by Testing
  2. Verification by Calculation/Measurement
  3. Verification by Design rules

The requirements regarding short circuit performance, temperature rise, dielectric properties and rated diversity factor have been covered in more detail.

Title:Introduction to IEC 61439 – A new standard on Switchgear and Controlgear Assemblies
Format:PDF
Size:1.6 MB
Pages:4
Download:Right here | Get Download Updates | Get Technical articles
Introduction to IEC 61439 - A new standard on Switchgear and Controlgear Assemblies

Introduction to IEC 61439 - A new standard on Switchgear and Controlgear Assemblies

Weekly Download Updates //

Once per week, we are releasing download update in following sections: MS Excel calculation spreadsheets, electrical software and guides and various engineering books.

Be first to get this download update!

Subscribe Now!

Page edited by E.C. (Google).



2 Comments

  1. […] the impulse. Formerly such performance was defined only by experimental testing; according to the new standard IEC 61439 also a verification by “design rule” is possible as an alternative and with the same validity […]


  2. wc_foronda
    Oct 17, 2013

    problem with file format, can’t open file after download..

Leave a Comment

Tell us what you're thinking... we care about your opinion!
and oh, not to forget - if you want a picture to show with your comment, go get a free Gravatar!


seven − = 1

CONNECT //
Electrical Engineering Daily Dose
Daily dose of knowledge and news from
Electrical Engineering World

Support our work //

Feel free to donate and support our work and contribution to the #EE society.