Results 211 to 220 of about 2,203,901 (263)
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Transactions of the American Institute of Electrical Engineers, 1948
Although electromagnetic protective relays are adequate for present requirements, the ever-increasing demand for higher speeds and greater accuracy and dependability seems likely to exceed the capabilities of relays now available. However, the trend toward electronic control circuits in other branches of electrical engineering, coupled with the recent ...
R. H. Macpherson +2 more
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Although electromagnetic protective relays are adequate for present requirements, the ever-increasing demand for higher speeds and greater accuracy and dependability seems likely to exceed the capabilities of relays now available. However, the trend toward electronic control circuits in other branches of electrical engineering, coupled with the recent ...
R. H. Macpherson +2 more
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Simplicity in protective relaying
Electrical Engineering, 1946SIMPLICITY is of paramount importance when designing and laying out protective relay circuits. These circuits are called upon to operate so infrequently that they should be more reliable than the apparatus or lines they protect. Certain limiting conditions and requirements requested by circuit designers generally cause false tripping and make the ...
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Practical EMV Relay Protection
2022 IEEE Symposium on Security and Privacy (SP), 2022Relay attackers can forward messages between a contactless EMV bank card and a shop reader, making it possible to wirelessly pickpocket money. To protect against this, Apple Pay requires a user's fingerprint or Face ID to authorise payments, while Mastercard and Visa have proposed protocols to stop such relay attacks.
Andreea-Ina Radu +4 more
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Transmission Line Relay Protection
Transactions of the American Institute of Electrical Engineers, 1919This paper is divided into three parts, the first part consisting of a list of relay nomenclature according to function and application, the second part being a general discussion on relay protection with special reference to an investigation of the Protective Devices Committee to obtain information on transmission line protective scheme and the third ...
H. R. Woodrow +3 more
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Transactions of the American Institute of Electrical Engineers, 1912
Reviewing American practise in the use of relay protective devices for electrical generating, transmission and distributing systems, there appears to have been no material change in the construction or commercial application of this class of apparatus in a considerable period of years.
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Reviewing American practise in the use of relay protective devices for electrical generating, transmission and distributing systems, there appears to have been no material change in the construction or commercial application of this class of apparatus in a considerable period of years.
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Electrical Engineering, 1935
Recent developments in relay protective schemes, using metallic pilot channels for isolating a transmission line during fault conditions, reduce conditions, considerably the magnitude of the currents which must be handled. Schemes recently developed have many other advantages over the older pilot wire schemes being more economical to install and ...
E. E. George, W. R. Brownlee
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Recent developments in relay protective schemes, using metallic pilot channels for isolating a transmission line during fault conditions, reduce conditions, considerably the magnitude of the currents which must be handled. Schemes recently developed have many other advantages over the older pilot wire schemes being more economical to install and ...
E. E. George, W. R. Brownlee
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Characteristics of protective relays
Proceedings of the American Institute of Electrical Engineers, 1912The object of this paper is to describe the general characteristics of protective relays necessary for the automatic and selective action of circuit breaking and switching devices connected to electrical distributing systems. It is not my purpose to discuss or advocate any specific type or make of relay, but rather to bring before you the necessary ...
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Journal of Energy - Energija, 2022
The article presents the development of a relay protection database through a series of phases. In the planning phase of the database, problems in a typical relay protection department are examined and the reasons why a database should be developed are determined. Subsequently, during the phase of analysis and the specification of requirements, what
null Elis Sutlović +1 more
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The article presents the development of a relay protection database through a series of phases. In the planning phase of the database, problems in a typical relay protection department are examined and the reasons why a database should be developed are determined. Subsequently, during the phase of analysis and the specification of requirements, what
null Elis Sutlović +1 more
openaire +1 more source