IEC TR 61641:2008

This technical report applies to enclosed low-voltage switchgear and controlgear assemblies   hereafter called ASSEMBLIES   manufactured according to IEC 60439-1.
This second edition cancels and replaces the first edition (1996) and constitutes a technical revision.

The main change introduced in this new edition is the following:
the concept of ASSEMBLY protection under arcing conditions has been introduced.