Journal ArticleDOI
AC Flashover Tests at Project UHV on Ice-Coated Insulators
TLDR
The flashover voltages of 25 units of 53/4- by 10-inch insulators were 288 kV (phase to ground) in the former condition and 246 kV in the latter condition.Abstract:
This paper presents results of experimental studies on the flashover strength of ice-coated insulators. Two types of flashover have been found on ice-covered insulators. One is caused by hard and dry ice formed in temperatures lower than 15 °F. Another is caused by mixed conditions of ice and misty rain in relatively high temperatures of 20 to 30 °F. The flashover voltages of 25 units of 53/4- by 10-inch insulators were 288 kV (phase to ground) in the former condition and 246 kV in the latter. These results were obtained for uncontaminated insulators. Nonuniform voltage distribution along the insulator string produces these low flashover voltages. These tests were conducted at General Electric's Project UHV in the winter season of 1968-1969.read more
Citations
More filters
Journal ArticleDOI
Ice accretions on high–voltage conductors and insulators and related phenomena
TL;DR: A good part of the research work accomplished to date on the atmospheric icing of conductors and insulators in the presence of high voltage, with emphasis laid on the studies carried out at the University of Quebec in Chicoutimi as discussed by the authors.
Journal ArticleDOI
Durability of a lubricant-infused Electrospray Silicon Rubber surface as an anti-icing coating
TL;DR: In this article, a heptadecafluorodecyl trimethoxysilane-fluorinated hierarchically micro-structured silicone rubber surface was prepared by electrospray method coupled with phase separation which had a contact angle of the lubricant θls(a) = 0°.
Journal ArticleDOI
Flashover problems caused by ice build up on insulators
M. Farzaneh,J. Kiernicki +1 more
TL;DR: The number of single-phase faults in the transmission networks in wintertime increases substantially during cold atmosphere precipitation and after ice accretions followed by a rise in air temperature above 0/spl deg/C as mentioned in this paper.
Journal ArticleDOI
Insulator icing test methods and procedures: a position paper prepared by the IEEE task force on insulator icing test methods
Masoud Farzaneh,T. Baker,A. Bernstorf,K. Brown,W. A. Chisholm,C. de Tourreil,J.F. Drapeau,S. Fikke,J.-M. George,E. Gnandt,T. Grisham,Ivan Gutman,R. Hartings,R. Kremer,G. Powell,L. Rolfseng,T. Rozek,D.L. Ruff,D. Shaffner,V. Sklenicka,Raji Sundararajan,Jicheng Yu +21 more
TL;DR: Test methods for evaluating flashover voltage of ceramic and nonceramic insulators under ice, snow, and cold-fog conditions are recommended in this paper, which describes the procedure to be followed at various stages of an evaluation test including preparation of the test object, insulator precontamination, ice and snow deposits as well as voltage applications and flash-over voltage evaluation.
Journal ArticleDOI
AC flashover performance of insulators covered with artificial ice
Masoud Farzaneh,J.F. Drapeau +1 more
TL;DR: In this paper, a field observation of ice accretion on Hydro-Quebec HV insulators was carried out, as well as a laboratory investigation of the AC flashover performance of various types of insulators covered with artificial ice.
References
More filters
Journal ArticleDOI
Performance of Line Insulators Under Rime Ice
M. M. Khalifa,R. M. Morris +1 more
TL;DR: In this paper, single suspension insulator units of several types as well as multi-unit strings were studied in a large refrigerated chamber and rime ice of various densities was deposited on these insulators.
Journal ArticleDOI
Flashover Tests at Project UHV on Salt-Contaminated Insulators, Part II
TL;DR: In this article, experimental studies on the contamination flashover strength of EHV insulator strings are presented, and the results compare favorably with a theoretical analysis by Boehne and Weiner in 1966-1967.
Journal ArticleDOI
Flashover Test at Project UHV on Salt-Contaminated Insulators
Mikio Kawai,David M. Milone +1 more
TL;DR: The results of experimental studies on the contamination flashover strength of different shapes of transmission line insulators are presented in this article, where the authors employed the steam- fog method used at General Electric's Project UHV since May 1968.
Journal ArticleDOI
Design and Application of EHV and UHV Vertical Break and Vertical Reach Switches
TL;DR: In this article, the design and application of EHV and ultra-high-voltage (UHV) disconnecting switches is discussed. And the results of comprehensive electrical and mechanical tests conducted on 765-kV vertical break and vertical reach switches are reported.
Related Papers (5)
Withstand voltage characteristics of insulator string covered with snow or ice
H. Matsuda,H. Komuro,K. Takasu +2 more