DD IEC/TS 60815-1:2008

FOREWORD
1 Scope and object
2 Normative references
3 Terms, definitions and abbreviations
  3.1 Terms and definitions
  3.2 Abbreviations
4 Proposed approaches for the selection and dimensioning
  of an insulator
  4.1 Approach 1
  4.2 Approach 2
  4.3 Approach 3
5 Input parameters for the selection and dimensioning
  of insulators
6 System requirements
7 Environmental conditions
  7.1 Identification of types of pollution
      7.1.1 Type A pollution
      7.1.2 Type B pollution
  7.2 General types of environments
  7.3 Pollution severity
8 Evaluation of site pollution severity (SPS)
  8.1 Site pollution severity
  8.2 Site pollution severity evaluation methods
  8.3 Site pollution severity (SPS) classes
9 Insulation selection and dimensioning
  9.1 General description of the process
  9.2 General guidance on materials
  9.3 General guidance on profiles
  9.4 Considerations on creepage distance and insulator
      length
  9.5 Considerations for exceptional or specific
      applications or environments
      9.5.1 Hollow insulators
      9.5.2 Arid areas
      9.5.3 Proximity effects
      9.5.4 Orientation
      9.5.5 Maintenance and palliative methods
Annex A (informative) - Flowchart representation of the
        design approaches
Annex B (informative) - Pollution flashover mechanisms
Annex C (normative) - Measurement of ESDD and NSDD
Annex D (normative) - Evaluation of type B pollution severity
Annex E (normative) - Directional dust deposit gauge
        measurements
Annex F (normative) - Use of laboratory test methods
Annex G (normative) - Deterministic and statistical approaches
        for artificial pollution test severity and acceptance
        criteria
Annex H (informative) - Example of a questionnaire to collect
        information on the behaviour of insulators in
        polluted areas
Annex I (informative) - Form factor
Annex J (informative) - Correspondence between specific
        creepage distance and USCD
Bibliography

Describes the selection of insulators, and the determination of their relevant dimensions, to be used in high-voltage systems with respect to pollution.

IEC/TS 80815-1:2008(E) applies to the selection of insulators, and the determination of their relevant dimensions, to be used in high-voltage systems with respect to pollution. This part of IEC 60815 gives general definitions, methods for the evaluation of pollution site severity (SPS) and outlines the principles to arrive at an informed judgement on the probable behaviour of a given insulator in certain pollution environments. This first edition of IEC/TS 60815-1 cancels and replaces IEC/TR 60815, which was issued as a technical report in 1986.