Results 261 to 270 of about 118,245 (290)

Flashover and Transformer Voltage

IEEJ Transactions on Industry Applications, 2010
This thesis stated many examples about transformer voltage on the direct current motor and generator that those were measured. They suggest that a flashover occurrence often has an indirect influence.
Kensho Sugimoto, Yuji Nakanishi, Noboru Morita   +2 more
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Transformer electrostatic voltage distribution

Electrical Engineering, 1956
ONE OF THE PROBLEMS in power-transformer design is the control of the distribution of electrostatic voltage, produced by surge voltages applied to the line terminals. For waves with a relatively steep front, this initial electrostatic distribution is, to a large extent, determined by the capacitance network formed between the winding elements, the core,
Saul Bennon, R. J. Cossaart
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High-voltage test transformers

Electronics and Power, 1972
As transmission voltages have increased it has become necessary to carry out fundamental research work on transformers outdoors with all the attedant problems of weatherproofing. New core and insulating materials point to the possibility of smaller and lighter transformers so that indoor installations can be ...
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Voltage sag analysis through wavelet transform

MELECON '98. 9th Mediterranean Electrotechnical Conference. Proceedings (Cat. No.98CH36056), 2002
The objective of the paper is an in-depth voltage sag characterization. Attention is turned in particular to detect the frequency range associated to the main transients contained in the voltage waveform during sag. A suitable tool for this study is the wavelet transform, which allows decomposition of a transient signal into a series of wavelet ...
QUAIA, STEFANO, PASTORE, STEFANO, TORELLI, LUCIO   +2 more
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Distribution-transformer voltage stresses

Electrical Engineering, 1949
INFREQUENT REPORTS of severe mechanical damage to small transformers as a result of nearby lightning strokes have led to the conclusion that the cause of the damage was the passage of heavy lightning currents in opposing directions in the two halves of the low-voltage windings.
K. D. Beardsley, W. A. Mcmorris, H. C. Stewart   +2 more
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Current and voltage transformers

2011
Current or voltage instrument transformers are necessary to isolate the protection, control and measurement equipment from the high voltages of a power system, and for supplying the equipment with the appropriate values of current and voltage generally these are 1 or 5 A for the current coils, and 120 V for the voltage coils.
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High-voltage fusing of transformer banks

Electrical Engineering, 1942
The paper summarizes some 15 years' experience with the high-side fusing of 11-, 22-, and some 66-kv transformer banks. The original purpose of fusing has through this experience been expanded to cover functions that are deemed desirable, and the authors feel that their approach to the specific protection field served by fuses has resulted in ...
H. H. Marsh, G. B. Dodds
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Current and voltage transformers

1997
Current and voltage transformers provide the interface between the power system high-voltage plant (primary plant) and the protection, control and metering equipment (secondary plant). The earlier sections of this chapter deal with current transformers, including primary injection techniques, and the later sections with voltage transformers.
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High-Voltage, High-Frequency Transformer Design

2012
Conversion of AC mains voltages to a high-voltage (>10 kV), high-power (>10 kW) DC level is a key area of technology which is a requirement in many industrial processes, for example, in particulate emission control using electrostatic precipitators. In the majority of cases, this high-voltage DC requirement is achieved with a singlephase AC regulator ...
Paul Lefley, Philip Devine
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High-Voltage Compressed-Gas Power Transformers

Transactions of the American Institute of Electrical Engineers, 1944
IN a previous article,1 the author pointed cut the many advantages of high-voltage power transmission in compressed gas. Compressed CO 2 at the moderate pressure of 40 atmospheres (absolute) has a dielectric strength about 20 times as high as that of air at normal atmospheric pressure, and compressed SO 2 at 40 atmospheres about 30 times as high, so ...
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