Results 201 to 210 of about 27,339 (259)
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A New Reactance Distance Relay
Transactions of the American Institute of Electrical Engineers, 1948THE HIGH LEVEL of industrial and commercial activity has created a demand for electric power greater today than at the peak of wartime production. Installation of additional generating capacity and new transmission lines has been unable to keep up with this growth in power demand.
C. G. Dewey, J. R. Mcglynn
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IET Generation, Transmission and Distribution, 2016 The aim of relay coordination is to obtain the optimal relay settings which result in minimum operating times of the relays, satisfying selectivity constraints. In combined coordination of distance and directional overcurrent relays (D&DOCRs), operating times of the second zone of distance relays (
Yaser Damchi +2 more
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Electrical Engineering, 1946
THE NEED for more adequate discrimination by means of distance relays, between fault conditions and power swings has been heightened in recent years by the construction of longer transmission lines and by the transmission of larger amounts of energy over existing lines.
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THE NEED for more adequate discrimination by means of distance relays, between fault conditions and power swings has been heightened in recent years by the construction of longer transmission lines and by the transmission of larger amounts of energy over existing lines.
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Performance of distance relays
Electrical Engineering, 1936The effect of grounded neutral ?/Y or Y/? power transformers upon the performance of certain impedance and reactance relays is set forth in this paper, and formulas are developed for use in predetermining the performance of these relays under operating conditions.
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Instantaneous Overcurrent Relays for Distance Relaying
Transactions of the American Institute of Electrical Engineers, 1935Instantaneous isolation of faults on transmission and distribution lines is ever a problem of the relay engineer. The use of instantaneous overcurrent relays as applied to the system of the Oklahoma Gas and Electric Company is discussed in this paper. Relays of this type were applied in conjunction with already installed overcurrent time delay relays ...
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2013
Contactless smart cards are used to securely store data and to authorize the execution of sensitive operations. Their contactless interface represents a mixed blessing, allowing fast operations but also such devices to potential attacks. Relay attacks are among the most powerful attacks applicable against contactless smart cards, allowing a contactless
Luigi Sportiello, Andrea Ciardulli
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Contactless smart cards are used to securely store data and to authorize the execution of sensitive operations. Their contactless interface represents a mixed blessing, allowing fast operations but also such devices to potential attacks. Relay attacks are among the most powerful attacks applicable against contactless smart cards, allowing a contactless
Luigi Sportiello, Andrea Ciardulli
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To Relay or Not to Relay: Open Distance and Optimal Deployment for Linear Underwater Acoustic Networks [PDF]
IEEE Transactions on Communications, 2018 Existing works have widely studied relay-aided underwater acoustic networks under some specialized relay distributions, e.g., equidistant and rectangular-grid. In this paper, we investigate two fundamental problems that under which conditions a relay should be deployed and where to deploy it if necessary in terms of the energy and delay performance in ...
Hongkuan Zhou, Yuzhou Li, Tao Jiang
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Microprocessor-based distance relays
Microprocessors and Microsystems, 1983Abstract This paper present a microprocessor-based distance-relaying scheme suitable for the protection of EHV lines. The scheme offers compactness and flexibility, and reduces numbers and types of relaying units. A generalized interface employing operational amplifiers, analogue-to-digital converter, voltage comparators and analogue multiplexer has ...
Badri Ram, B.B. Chakravarty
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Transactions of the American Institute of Electrical Engineers, 1948
DISTANCE-TYPE relays have been used successfully for many years to protect against phase faults on transmission lines. However, distance relays to protect against ground faults in the same satisfactory manner as for phase faults have not been generally available.
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DISTANCE-TYPE relays have been used successfully for many years to protect against phase faults on transmission lines. However, distance relays to protect against ground faults in the same satisfactory manner as for phase faults have not been generally available.
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Distance relay action during oscillations
Electrical Engineering, 1934The behavior of distance relays during system oscillations is analyzed in this paper, and curves are presented for determining whether the oscillations are likely to cause relay operation. Different types of distance relays are considered and general methods of analyzing system conditions are discussed.
E. H . Bancker, E. M. Hunter
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