Results 111 to 120 of about 114,124 (166)

The impulse characteristics of porcelain insulators

Journal of the Institution of Electrical Engineers - Part I: General, 1941
This report deals with the flashover voltage of insulators and gaps subjected to impulse voltages of different wave-shapes, with the relation between crest voltage and time to flashover at voltages above the minimum required for flashover, with breakdown while the voltage is rising rapidly, with the simultaneous application of impulse and alternating ...
G.W. Bowdler, W.G. Standring
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Failure Trends of High-Voltage Porcelain Insulators Depending on the Constituents of the Porcelain

Applied Sciences (Switzerland), 2020
The aging of porcelain insulators is responsible for the failure of power utilities. Porcelain insulators from different places in South Korea, possessing various aging times and years of installation, have been investigated to carry out lifetime ...
Junsin Yi, Taeyong Kim, Simpy Sanyal
exaly   +2 more sources

A solution of the porcelain insulator problem

Journal of the American Institute of Electrical Engineers, 1921
MANY YEARS ago porcelain insulators on transmission lines began to crack in great numbers. In the earlier cases a few disks in many strings had cracked before the transmission engineers had discovered the condition. Indeed, there was at that time no reason to believe that insulators would deteriorate in any way.
E. E. F. Creighton, F. L. Hunt
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A new porcelain post insulator

Electrical Engineering, 1934
A new porcelain post insulator for transmission lines, which is free from radio effect at its operating voltage, is described in this paper. Capacitance measurements are utilized to determine and rate the radio characteristics. Other points of design are described, such as improved leakage path to resist arcing in contaminated atmosphere, greater ...
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Vacuum Evaporation of Porcelain Mixture in Production of Porcelain Insulators

Glass and Ceramics, 2005
The process of vacuum evaporation of porcelain mixtures on vacuum presses and the ways for improving the production of porcelain insulators are considered. A calculation of unit molding pressure is proposed; the pressure distribution along the press and depending on the moisture of the mixture is indicated.
V. F. Gaivoronskii, A. I. Postoronko
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The application of porcelain to strain insulators

Proceedings of the American Institute of Electrical Engineers, 1910
Porcelain possesses some qualities which make it a very good material for line insulators and especially strain insulators. It can be moulded and worked into almost any desired form or size; when made of proper materials and properly burned it has practically no depreciation when exposed to the weather, acid fumes or gases, which sometimes create so ...
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The production of porcelain for electrical insulation — IV

Journal of the American Institute of Electrical Engineers, 1923
This article contains several excerpts taken from papers presented at recent meetings of the San Francisco and Los Angeles Sections by Dr. Joseph A. Jeffery on “Modern Methods of Firing High-Voltage Porcelain.” The pyrochemical reactions which take place during firing have been described1.
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Investigation of Porcelain Insulators at High Altitudes

Transactions of the American Institute of Electrical Engineers, 1946
The use of high voltage apparatus in military aircraft made it necessary to obtain flashover data on capacitor bushings at altitudes up to 50,000 feet. Some of the more pertinent data are presented in this paper which gives a-c and d-c flashover voltages for porcelain bushings having spacings of 5/8 inch to 2 7/8 inches from cap to ring. The tests were
C. V. Fields, C. L. Cadwell
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Porcelain insulators in electrostatic precipitator

Journal of Electrostatics, 2015
Abstract Electrostatic precipitators (ESPs) are commonly the most used filtration technology at industrial environments considering that ESPs allow to have a high dedusting efficiency. ESP insulators are key components in a precipitator inasmuch as if they do not work properly, the efficiency decreases quickly, and even having an inadequate ...
Fernando Menéndez, Alberto Gómez, Francisco Voces, Virgilio García   +3 more
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Temperature Researches of Porcelain Insulator

Advanced Materials Research, 2013
When porcelain insulator operates in a harsh environment for a long time, it will cause leakage current increase, and lead to heating phenomenon. As a result, the temperature of porcelain insulator can be changed, which probably due to crack, breakdown or other factors.
Cheng Jun Zhao, Chuan Li, Xu Zhang, Zhen Gang Zhao, Ying Na Li, Tao Xie   +5 more
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