Table of Contents

FOREWORD
INTRODUCTION
1 Scope
2 Normative references
3 Terms and definitions
4 General test requirements
5 Salt fog method
6 Solid layer method
Annex A (informative) - Method for checking the uniformity
        of the layer
Annex B (informative) - Determination of the withstand
        characteristics of insulators
Annex C (informative) - Additional recommendations concerning
        the solid layer method procedures
Annex D (informative) - Information to check equipment for
        artificial pollution tests
Annex E (informative) - Supplementary information on
        artificial pollution tests on insulators for voltage
        systems of [+/-] 600 kV and above (solid layer method
        procedure B)
Annex F (informative) - Further investigation
Bibliography

Abstract

Pertains to the determination of the d.c. withstand characteristics of ceramic and glass insulators to be used outdoors and exposed to polluted atmospheres, on d.c. systems with the highest voltage of the system greater than [+/-] 1000 V.

Scope

This technical specification is applicable for the determination of the d.c. withstandcharacteristics of ceramic and glass insulators to be used outdoors and exposed to pollutedatmospheres, on d.c. systems with the highest voltage of the system greater than ± 1 000 V.

General Product Information

Published
Document Type	Standard
Status	Current
Publisher	British Standards Institution
ProductNote	THIS STANDARD ALSO REFERS TO CIGRE TECHNICAL BROCHURE NO. 518
Pages
ISBN
Committee	PEL/36
Supersedes	13/30286196 DC : 0 BS 7744(1994) : 1994