IEC TS 62271-304:2008 PDF

Scope: 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 service conditions more severe with respect to condensation and pollution than the normal service conditions specified ~n IEC 62271-1. This technical specification covers equipment where any of the insulation is exposed to indoor climatic conditions. The test detailed in this technical specification has been designed primarily to investigate the behaviour of electrical insulation and not corrosion on equipments. Nevertheless, the performance of mechanical components, such as mechanisms, interlocks and enclosures may also be recorded. This technical specification proposes definitions for two degrees of severe service conditions with respect to condensation and pollution. It also proposes test procedures for assessing the performance of enclosed switchgear and controlgear under specified conditions so that conclusions may be drawn concerning their suitability for service under those severe service conditions. In this technical specification, the term "equipment" is used in accordance with the scope for an "enclosed assembly of switchgear and controlgear" (see IEC 60050-441, definition 441-12- O2). NOTE The testing procedures described in this technical specification may also be applied to internal msulabon of outdoor equipment.

IEC TS 62271-304:2008 Referenced Document

IEC 60060-1 High-voltage test techniques - Part 1: General definitions and test requirements*， 2010-09-01 Update
IEC 60068 Basic climatic and mechanical robustness testing procedure for components
IEC 62271-1:2007 High-voltage switchgear and controlgear - Part 1: Common specifications

2019 IEC TS 62271-304:2019 High-voltage switchgear and controlgear - Part 304: Classification of indoor enclosed switchgear and controlgear for rated voltages above 1 kV up to and including 52 kV related to the use in special s
2010 IEC TS 62271-304:2008/COR1:2010 High-voltage switchgear and controlgear - Part 304: Design classes for indoor enclosed switchgear and controlgear for rated voltages above 1 kV up to and including 52 kV to be used in severe climatic conditions; Corrigendum 1
2008 IEC TS 62271-304:2008 High-voltage switchgear and controlgear - Part 304: Design classes for indoor enclosed switchgear and controlgear for rated voltages above 1 kV up to and including 52 kV to be used in severe climatic conditions