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Author Moran, R.J. ♦ DeCesaro, F.P. ♦ Dugan, R.C.
Source IEEE Xplore Digital Library
Content type Text
Publisher Institute of Electrical and Electronics Engineers, Inc. (IEEE)
File Format PDF
Copyright Year ©1991
Language English
Subject Domain (in DDC) Technology ♦ Engineering & allied operations ♦ Applied physics
Subject Keyword Surges ♦ Automatic control ♦ Logic testing ♦ Transient analysis ♦ Control systems ♦ Security ♦ Transformers ♦ Joining processes ♦ Virtual prototyping ♦ Analytical models
Abstract A new methodology for sectionalizer control has been developed that provides more security for applications where system transient currents may cause actuate pickup. Actuate pickup, particularly on ground sensing, may occur during upline ground faults when the sudden load current imbalance is compounded by the unfaulted phase voltage rise causing magnetizing current inrush into a large amount of distribution transformers downline from the sectionalizer. Also, motor backfeed and nonsimultaneous fault clearing may cause actuate pickup if the load is sufficiently large. The control has five automatic restraint features: inrush restraint, count restraint, time-integrated threshold restraint, response restraint, and ground restraint. The last three are new features. The control logic was tested by connecting a prototype to the transient network analyzer and simulating conditions that were suspected of causing problems.
Description Author affiliation: Cooper Power Systems, South Milwaukee, WI, USA (Moran, R.J.)
ISBN 0780302192
Educational Role Student ♦ Teacher
Age Range above 22 year
Educational Use Research ♦ Reading
Education Level UG and PG
Learning Resource Type Article
Publisher Date 1991-09-22
Rights Holder Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Size (in Bytes) 559.20 kB
Page Count 7
Starting Page 646
Ending Page 652


Source: IEEE Xplore Digital Library