SELECTION AND DIMENSIONING OF HIGH-VOLTAGE INSULATORS INTENDED FOR USE IN POLLUTED CONDITIONS - PART 2: CERAMIC AND GLASS INSULATORS FOR A.C. SYSTEMS
International Electrotechnical Committee
FOREWORD<br>1 Scope and object<br>2 Normative references<br>3 Terms, definitions and abbreviations<br> 3.1 Terms and definitions<br> 3.2 Abbreviations<br>4 Principles<br>5 Materials<br>6 Site severity determination<br>7 Determination of the reference unified specific <br> creepage distance (RUSCD)<br>8 Choice of profile<br> 8.1 General recommendations for porcelain and <br> glass profiles<br> 8.2 Profile suitability<br>9 Checking the profile parameters<br> 9.1 Alternating sheds and shed overhang<br> 9.2 Spacing versus shed overhang<br> 9.3 Minimum distance between sheds<br> 9.4 Creepage distance versus clearance<br> 9.5 Shed angle<br> 9.6 Creepage factor<br>10 Correction of the RUSCD<br> 10.1 Correction for altitude K[a]<br> 10.2 Correction for insulator diameter K[ad]<br>11 Determination of the required minimum nominal<br> creepage distance<br>12 Confirmation by testing<br> 12.1 Determination of the long-duration withstand <br> voltage<br> 12.2 Selection of the standard pollution withstand <br> test type<br> 12.3 Artificial pollution test parameters<br> 12.4 Criteria of confirmation<br>Bibliography
Describes the selection of ceramic and glass insulators for a.c. systems, and the determination of their relevant dimensions, to be used in high-voltage systems with respect to pollution.
| Document Type | Standard |
| Status | Current |
| Publisher | International Electrotechnical Committee |
| Committee | TC 36 |
| Supersedes |
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