CLC/TS 62271-304:2008

FOREWORD
1 Scope and object
2 Normative references
3 Degrees of severity of service conditions under
  condensation and pollution
4 Classification of enclosed switchgear and controlgear
5 Classification procedure
6 Test facilities and associated requirements
  6.1 Climatic test room
  6.2 Control requirements
  6.3 Energizing facilities
7 Selection and arrangement of the equipment for test
  7.1 Selection of the equipment
  7.2 Arrangement of the equipment
8 Ageing test
  8.1 Level 1 ageing test
  8.2 Level 2 ageing test
9 Diagnostic procedure after ageing test
  9.1 General
  9.2 Electrical diagnostic procedure
  9.3 Mechanical diagnostic procedure (optional)
  9.4 Evaluation
Annex A (normative) Climatic cycle
Annex B (normative) Climatic test room
Annex C (informative) Example of typical environment
Annex ZA (normative) Normative references to international
         publications with their corresponding European
         publications

IEC/TS 62271-304:2008 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 in IEC 62271-1. This technical specification covers equipment where any of the insulation is exposed to indoor climatic conditions. This first edition of IEC/TS 62271-304 cancels and replaces the first edition of IEC/TS 60932, published in 1988, and constitutes a technical revision. This revised document has been basically changed to be updated to today's use of high-voltage switchgear and controlgear up to 52 kV.The contents of the corrigendum of January 2010 have been included in this copy.