Defective insulators in live working on a 550 kV compact steel lattice tower

Author

Gela, G. ; Kientz, H. ; Fox, H.J., Jr ; Mitchell, J.D. ; Lyons, P.F.

Author_Institution

EPRI Power Delivery Centre, Lenox, MA, USA

fYear

1995

fDate

29 Oct-3 Nov 1995

Firstpage

150

Lastpage

155

Abstract

Research was conducted to determine the minimum number of healthy insulator units needed to ensure worker safety in live working on a compact 550 kV steel lattice tower. A large variety of worksite conditions was investigated. Test results confirm the conservative nature of the CIGRE formula for defective insulator units, and modifications to the formula are suggested, The recommended number of healthy units is 12 in a string of 24 units for the case of live work on a compact 550 kV tower, when the portable protective gap (PPG) is used. Adjustment for altitude should be made above 900 m (3000 ft.)

Keywords

health hazards; insulators; maintenance engineering; poles and towers; safety; steel; 550 kV; CIGRE formula; altitude adjustment; compact steel lattice tower; defective insulators; insulator flashover; live working; portable protective gap; worker safety; Flashover; Health and safety; Insulation; Lattices; Occupational stress; Poles and towers; Protection; Steel; Surges; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Transmission and Distribution Construction and Live Line Maintenance, 1995. ESMO-95 Proceedings., Seventh International Conference on

Conference_Location

Columbus, OH

Print_ISBN

0-7803-2506-0

Type

conf

DOI

10.1109/TDCLLM.1995.485050

Filename

485050