DS/EN 61439-3:2012

Low-voltage switchgear and controlgear assemblies - Part 3: Distribution boards intended to be operated by ordinary persons (DBO)

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IEC 61439-3:2012 defines the specific requirements for distribution boards intended to be operated by ordinary persons (DBO). DBOs have the following criteria: – intended to be operated by ordinary persons (e.g. switching operations and replacing fuse-links), e.g. in domestic (household) applications; – outgoing circuits contain protective devices, intended to be operated by ordinary persons, complying e.g. with IEC 60898-1, IEC 61008, IEC 61009, IEC 62423 and IEC 60269-3; – rated voltage to earth does not exceed 300 V a.c.; – rated current (Inc) of the outgoing circuits does not exceed 125 A and the rated current (InA) of the DBO does not exceed 250 A; – intended for the distribution of electrical energy; – enclosed, stationary; – for indoor or outdoor use. This first edition cancels and replaces the first edition of IEC 60439-3 (1990), Amendment 1 (1993) and Amendment 2 (2001). It constitutes a technical revision. This edition includes the following significant technical changes with respect to IEC 60439-3 (including the amendments): – alignment with IEC 61439-1:2011. This publication is to be read in conjunction with IEC 61439-1:2011.

Number of pages: 64

Published: 2012-05-25

Date of approval: 2012-05-23

International relationships : EN 61439-3:2012 IDT IEC 61439-3:2012 ED1 IDT

ICS: 29.130.20 - Low voltage switchgear and controlgear

Item number: M249414



  • CLC/SR 17D
  • IEC/TC 17/SC 17D

Danish committee


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