BS PD CLC IEC/TR 62271-307:2019

This Part of IEC 62271, 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 62271-200:2011EN 62271-1:2008/A1:2011EN 62271-200:2012EN 62271-1:2008IEC 60050-441:1984/AMD1:2000IEC 62271-201:2014IEC 62271-1:2007/AMD1:2011IEC 60050-441:1984EN 62271-201:2014IEC 62271-1:2007IEC 60865-1EN 60865-1IEC 60071-1:2006IEC 60071-1:2006/AMD1:2010EN 60071-1:2006EN 60071-1:2006/A1:2010Incorporates the following:Corrigendum, July 2019