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This part of IEC 62271 applies to indoor enclosed switchgear and controlgear complying with IEC 62271-200 and IEC 62271-201, intended to be used in special service conditions with respect to condensation and pollution deviating from the normal service conditions specified in IEC 62271-1. It applies to equipment whose insulation is exposed to indoor service conditions. The test according to this technical specification has been primarily designed to classify the operating behavior of the electrical insulation. The testing of mechanical components such as drives, interlocks and enclosures is optional. In this Technical Specification, the term "equipment" is used in accordance with the scope for an "enclosed assembly of switchgear and controlgear". The responsible committee is DKE/UK 432.2 "Typgeprüfte Hochspannungs-Schaltanlagen" ("Type-tested controlgear") of the DKE (German Commission for Electrical, Electronic and Information Technologies) at DIN and VDE.
This document replaces DIN IEC 62271-304:2007-04; VDE 0671-304:2007-04 .
This document has been replaced by: DIN IEC/TS 62271-304:2020-10; VDE V 0671-304:2020-10 .