Results 211 to 220 of about 3,622 (242)

The Protection of Solid Insulation by Lightning Arresters

Transactions of the American Institute of Electrical Engineers, 1941
Introduction THE protection of distribution transformers or other apparatus against lightning involves the basic problem of limiting the voltage applied to the insulation to a value adequately below the insulation strength. The effect on insulation of chopped waves and full waves of standard impulse wave shapes such as 1.5×40 microseconds has been ...
D. D. MacCarthy, T. J. Carpenter
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A Proposed Lightning-Arrester Test

Transactions of the American Institute of Electrical Engineers, 1907
It is generally recognized that the worst disturbances to an electrical transmission system from lightning are due to the unbalancing of the circuit-elements after the passage to ground of the initial lightning charge.
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Contamination Tests for Lightning Arresters

IEEE Transactions on Power Apparatus and Systems, 1970
Contamination deposits on arrester housings when wetted can cause external flashovers and, by disturbing the voltage distribution on the internal gaps, can lower the power frequency sparkover of the arresters. It has been found that the conditions that produce the lowest external flashover often do not cause the greatest reduction in sparkover ...
H. Stoelting, R. Ball, P. Bogner, R. Flugum, A. Koerber   +4 more
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New Principles in the Design of Lightning Arresters

Transactions of the American Institute of Electrical Engineers, 1907
The installation of lightning arresters is of the nature of an insurance. A certain percentage of the cost of the apparatus can reasonably be invested as a safeguard in protecting the apparatus. Furthermore, a percentage of the income can also be invested in protective apparatus as an insurance against interruption of service.
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1922 Developments in autovalve lightning arresters

Journal of the American Institute of Electrical Engineers, 1923
The work done in the past year in developing commercial forms of lightning arresters based on the ``autovalve'' principle is reported. Fundamental data given by Dr. Slepian at the 1922 Midwinter Convention are briefly reviewed. The balance of the paper deals with new material and covers further research, development and test.
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Lightning Arrester Spark Gaps-II

Transactions of the American Institute of Electrical Engineers, 1920
This paper describes a new form of high-voltage lightning arrester gap which has been called the ``impulse protective gap'' because of its particular effectiveness in protecting against line disturbances of steep wave front. The paper opens with a brief resume of some of the results of previous investigations of the subject of impulse voltages.
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Development and applications of lightning arresters for transmission lines

IEEE Transactions on Power Delivery, 1989
A lightning arrester with a series gap for transmission lines has been developed to prevent faults due to lightning. It has shown excellent performance since 1986 on 77 kV service lines in heavy lightning regions. A 275 kV lightning arrester has also been developed, and a field test was started on a service line in 1988.
Shuji Furukawa, Osamu Usuda, Takashi Isozaki, Takashi Irio   +3 more
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The Power Interruption Testing of Lightning Arresters

Transactions of the American Institute of Electrical Engineers, 1951
A special surge circuit has been developed for use in power interruption testing of lightning arresters. This circuit consists of a power source, a surge circuit, and an impulse timing circuit.
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Lightning Arrester Discharge Currents

Nature, 1948
DURING the last five years an investigation has been made of the discharge currents of a number of 38,000-volt lightning arresters. The transmission system on which these arresters were installed is operated with its neutral point earthed through Peterson coils; the lines are not equipped with overhead ground wires.
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Long-duration surge testing of lightning arresters

Electrical Engineering, 1951
A METHOD OF long-duration surge-withstand design testing of station-type lightning arresters is proposed for consideration by the industry. The test method involves successive applications of a surge having an essentially constant magnitude and a duration measured in thousands of microseconds.
S. B. Howard, T. J. Carpenter, H. Schwartz   +2 more
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