SELECTION AND DIMENSIONING OF HIGH-VOLTAGE INSULATORS INTENDED FOR USE IN POLLUTED CONDITIONS - PART 1: DEFINITIONS, INFORMATION AND GENERAL PRINCIPLES
International Electrotechnical Committee
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.
| Document Type | Standard |
| Status | Current |
| Publisher | International Electrotechnical Committee |
| Committee | TC 36 |
| Supersedes |
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