Results 241 to 250 of about 19,067 (286)
Some of the next articles are maybe not open access.
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
openaire +1 more source
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
openaire +1 more source
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 ...
openaire +1 more source
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
openaire +1 more source
Protective Relays on Pa. Locomotives
Transactions of the American Institute of Electrical Engineers, 1934No current rupturing device is provided between pantograph and main transformer on electric locomotives recently placed in operation on the Pennsylvania Railroad; instead a ``pantograph relay'' is used which is connected so as to utilize the substation circuit breakers to open high voltage short circuits, grounds, or overloads ofi the locomotive.
openaire +1 more source
Rectifier relay for transformer protection
Electrical Engineering, 1945THE BASIC PRINCIPLE of differential protection of electric equipment consists of measuring the sum of the currents at the various terminals of the generator, transformer, or bus. If the vector sum of these currents is substantially zero, there is no fault; if the vector sum is not zero, a fault condition is indicated.
openaire +1 more source
Filtering for protective relays
IEEE WESCANEX 93 Communications, Computers and Power in the Modern Environment - Conference Proceedings, 2002The authors identify filtering requirements or criteria for different relays. They limit the discussion to relays needing precise measurements of the system-frequency component of the signals, such as distance relays. Many different filtering methods which may meet the filtering requirements are conceived and reviewed.
E.O. Schweitzer, D. Hou
openaire +1 more source
Transactions of the American Institute of Electrical Engineers, 1949
This paper will describe the relay protection of the Shipshaw Number 2 Generating Station of the Aluminum Company of Canada, Limited, and will draw attention to particular points of interest in design considerations and will outline some operating results and experience.
J. T. Madill, F. H. Duffy
openaire +1 more source
This paper will describe the relay protection of the Shipshaw Number 2 Generating Station of the Aluminum Company of Canada, Limited, and will draw attention to particular points of interest in design considerations and will outline some operating results and experience.
J. T. Madill, F. H. Duffy
openaire +1 more source
Electrical protection relays. Information and requirements for all protection relays
2015+6 more sources