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
International Electrotechnical Committee
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
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.
| Document Type | Standard |
| Status | Current |
| Publisher | International Electrotechnical Committee |
| Committee | TC 17 |
| Supersedes |
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