BS PD IEC/TR 62271-307:2015, which is a Technical Report, refers to prefabricated metal-enclosed
and solid-insulation enclosed (both hereinafter called enclosed) switchgear and controlgear
assemblies for alternating current of rated voltages above 1 kV and up to and including 52 kV
as specified in IEC 62271-200 and IEC 62271-201, and to other equipment included in the
same enclosure with any possible mutual influence.This Technical Report may be used for the extension of the validity of type tests performed on
one test object with a defined set of ratings to another switchgear assembly of the same
family with a different set of ratings or different arrangements of components. It supports the
selection of representative test objects composed of functional units of a family of switchgear
and controlgear aimed at the optimization of type tests in order to perform a consistent
conformity assessment.This Technical Report utilises a combination of sound technical and physical principles,
manufacturer and user experience and calculations to establish guidance for the extension of
validity of type tests, covering various design and rating aspects.Cross References:IEC 60050-441:1984IEC 60050-441:1984/AMD1:2000IEC 62271-1:2007IEC 62271-1:2007/AMD1:2011IEC 62271-200:2011IEC 62271-201:2014IEC TR 60890IEC 61117IEC 60865-1IEC TR 60865-2CIGRE WG A3.24IEC 60112IEC TR 60943IEC 60071-1:2006IEC 60071-1:2006/AMD1:2010IEC 60050-151:2001IEC 60050-151:2001/AMD1:2013IEC 60050-151:2001/AMD2:2014All current amendments available at time of purchase are included with the purchase of this document.