DD IEC/TS 60815-2:2008
Current
The latest, up-to-date edition.
Selection and dimensioning of high-voltage insulators intended for use in polluted conditions Ceramic and glass insulators for a.c. systems
Hardcopy , PDF
English
30-06-2009
FOREWORD
1 Scope and object
2 Normative references
3 Terms, definitions and abbreviations
3.1 Terms and definitions
3.2 Abbreviations
4 Principles
5 Materials
6 Site severity determination
7 Determination of the reference unified specific
creepage distance (RUSCD)
8 Choice of profile
8.1 General recommendations for porcelain and
glass profiles
8.2 Profile suitability
9 Checking the profile parameters
9.1 Alternating sheds and shed overhang
9.2 Spacing versus shed overhang
9.3 Minimum distance between sheds
9.4 Creepage distance versus clearance
9.5 Shed angle
9.6 Creepage factor
10 Correction of the RUSCD
10.1 Correction for altitude K[a]
10.2 Correction for insulator diameter K[ad]
11 Determination of the required minimum nominal
creepage distance
12 Confirmation by testing
12.1 Determination of the long-duration withstand
voltage
12.2 Selection of the standard pollution withstand
test type
12.3 Artificial pollution test parameters
12.4 Criteria of confirmation
Bibliography
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