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Introduction to IEC 61439

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.

IEC 61439 standard for low voltage switchgear and controlgear assemblies
IEC 61439 standard for low voltage switchgear and controlgear assemblies (on photo: MNS unit substation transformer busbar connections; credit: controlequipment.ie)

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

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15 Comments


  1. Gabriel
    Apr 27, 2021

    Dear instructor, can you send me please the standards IEC 61439 from 1 to 7, I’ll appreciate it.


  2. Myint Maung
    Nov 16, 2020

    Thanks for information


  3. Sameera
    Oct 13, 2020

    Can any one share the IEC 61439 including all parts?


    • Av selvan
      Apr 27, 2021

      can any one send me test procedure or iec 61439


  4. vinod thangappa
    Aug 05, 2020

    Hi to all,

    I need to know about which standard to be followed for Power/control panel wiring refer to IEC derivatives.


  5. Sameera
    Jun 03, 2020

    Hi Edward,

    I am an electrical consultant in Sri Lanka. Can you please send me IEC 61439 standard all parts including busbar trunking.

    Thank you,
    Sameera


  6. Mangesh Dhepe
    May 12, 2020

    Hi,
    I want Electrical Panel Checklist Sample… Anyone Can Help Me ??


  7. Rajeev Pandey
    Apr 27, 2020

    यह हमारे Technical Improvement के लिए अच्छा Portal है.। मैं इस Electrical Engineering Portal को.10 में से 10 नंबर दे रहा हूँ।
    राजीव पांडेय
    Electrical Engineer (Maintenance)


  8. ศิริพร พิทักษ์กุล
    Jun 10, 2019

    Thank you very much.


  9. mohamed
    Dec 14, 2017

    thank you


  10. wc_foronda
    Oct 17, 2013

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

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