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Protection of Pilot-Wire Circuits

Transactions of the American Institute of Electrical Engineers, 1942
THIS paper reviews the problem of protecting pilot-wire circuits, briefly discusses the sources of disturbing voltages, describes two types of neutralizing transformers, and illustrates how they are used to distribute the disturbing voltage most favorably throughout the pilot-wire circuit.
E. L. Harder, M. A. Bostwick
openaire   +2 more sources

Pilot wire relay protection

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

Pilot protection communication channel requirements

57th Annual Conference for Protective Relay Engineers, 2004, 2004
Pilot relaying has been applied for transmission line protection since the 30's. The well known communication channels (pilot wire or power line carrier) are increasingly being replaced by digital channels. Dark fiber (dedicated fiber optic cable), multiplexed fiber optic systems (T1 and SONET) and 56 kbps phone lines (DDS - digital data service) are ...
S. Ward, T. Dahlin, B. Ince
openaire   +1 more source

Protection of Pilot Wires From Induced Potentials

Transactions of the American Institute of Electrical Engineers, 1946
The use of pilot-wire relays for protection of power transmission circuits usually requires a reliable pilot channel which is free of any induced potentials Which may cause transient voltages to appear between wires even though they may be of relatively low magnitude.
R. B. Killen, G. G. Law
openaire   +1 more source

Justifying pilot protection on transmission lines

2010 63rd Annual Conference for Protective Relay Engineers, 2010
This paper concerns the justification of the use of pilot protection on transmission lines.
Gary Kobet, Bogdan Kasztenny, Mark Allen, Art Buanno, Albert N. Darlington, Alla Deronja, Hyder DoCarmo, Jerry Finley, George Gresko, Larry Henriksen, Mike Jensen, Bill Kennedy, Kazik Kuras, Vahid Madani, Walter McCannon, Mike McDonald, John Miller, Mukesh Nagpal, Jim O'Brien, Frank Plumptre, Elmo Price, Sam Sambasivan, Mark Simon, Jian Cheng Tan, Ilia Voloh, Solveig Ward, Ray Young   +26 more
openaire   +1 more source

Pilot Backup Protection Based on Wireless Communication

2017 Ninth Annual IEEE Green Technologies Conference (GreenTech), 2017
The paper presents a back-up protection scheme for loop system from all types of fault based on the directional element. The traditional back-up protection schemes such as distance protection and overcurrent protection are not suitable for the loop system.
Zhenmin Tang, Qiushi Wang, George Karady
openaire   +1 more source

Protective films for pilot‐plant deodorizers

Journal of the American Oil Chemists' Society, 1951
SummaryWith mild agitation, soybean oil is not appreciably contaminated by contact with clean steel surfaces unless the fatty acid content is above 0.1% and the temperature above 150°C.It has been shown that an oxidized oil film is an effective coating for metals used in the construction of pilot‐plant deodorizers.
R. E. Beal, E. B. Lancaster
openaire   +1 more source

Pilot Protection Systems

2009
This chapter contains sections titled: Introduction Physical Systems for Pilot Protection Non-Unit Pilot Protection Schemes Unit Protection Pilot Schemes An Example of Extra High Voltage Line Protection Pilot Protection Settings Traveling Wave Relays Monitoring of Pilot Performance References ...
openaire   +1 more source