scope:

This technical report applies to enclosed low-voltage switchgear and controlgear assemblies;hereafter called ASSEMBLIES;manufactured according to IEC 60439-1. The purpose of this technical report is to give guidance on the method of testing of enclosed low-voltage switchgear and controlgear assemblies under conditions of arcing in air due to an internal fault. The purpose of this test is to assess the ability of the ASSEMBLY to limit the risk of personal injury and damage of ASSEMBLIES resulting from an internal arcing fault. This is a voluntary test made either at the discretion of the manufacturer, or subject to an agreement between manufacturer and user.