Title :
A Pilot-Wire Relaying Scheme Utilizing the Product Differential Relay [includes discussion]
Author :
Ward, R.I. ; Gilman, D.W.
Author_Institution :
MEMBER AIEE, Commonwealth Edison Company, Chicago, Ill.
Abstract :
This paper presents a pilot-wire relaying scheme which has been designed to take advantage of the product characteristic of the type-CFD relay. It operates as a variable-percentage differential-relaying scheme on light fault currents, and for all practical purposes as a phase-angle-comparison scheme on heavy fault currents. This scheme permits a wide latitude in the selection of current transformers and types of line terminations. It also provides protection of station equipment against high induced pilot-wire-to-ground voltages.
Keywords :
Circuit breakers; Conductors; Costs; Fuses; Hazards; Oil insulation; Optical character recognition software; Petroleum; Protection; Relays;
Journal_Title :
Power Apparatus and Systems, Part III. Transactions of the American Institute of Electrical Engineers
DOI :
10.1109/AIEEPAS.1953.4498719
