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  1. Industry Applications Magazine
  2. Year : 1999 Volume : 5
  3. Issue 2
  4. Static relays permit enhanced protection
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Year : 2016 Volume : 22
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Year : 1999 Volume : 5
Issue 6
Issue 5
Issue 4
Issue 3
Issue 2
Process seals: danger and solution [Letters]
Static relays permit enhanced protection
Better interpretation of vacuum interruptor tests
Fault analysis through power quality metering
Device miscoordination affects plant reliability
Simplifying motor coordination studies
Dynamic system reliability study modeling
Issue 1
Year : 1998 Volume : 4
Year : 1997 Volume : 3
Year : 1996 Volume : 2
Year : 1995 Volume : 1

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Static relays permit enhanced protection

Content Provider IEEE Xplore Digital Library
Author Bailey, B. Jakominich, D.
Copyright Year 1975
Abstract Multi-function multi-phase static overcurrent relays, using digital technology available today, provide basic time, (51) (51G) (51N) and instantaneous (50) (50G) (50N) three phase and ground overcurrent protection, and may offer some or all of the following additional functions: undervoltage (27); overvoltage (59); reverse phase sequence (47); negative phase sequence voltage (47N); directional overcurrent (67) (67N); frequency (81O/U); reverse interlocking trip coil monitoring; and battery monitoring. This article describes two applications that use some of the additional functions in such a relay: reverse interlocking, also using the directional overcurrent (67) function; and ground fault detection for systems utilizing high resistance grounding. The first application was installed on a 4160 volt power system which was supplied by two 5000 kVA transformers.
Starting Page 10
Ending Page 17
Page Count 8
File Size 804163
File Format PDF
ISSN 10772618
Volume Number 5
Issue Number 2
Language English
Publisher Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date 1999-03-01
Publisher Place U.S.A.
Access Restriction Subscribed
Rights Holder Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword Protective relaying Protection Digital relays Monitoring Power system relaying Voltage control Frequency Coils Batteries Electrical fault detection
Content Type Text
Resource Type Article
Subject Industrial and Manufacturing Engineering Control and Systems Engineering Electrical and Electronic Engineering Energy Engineering and Power Technology
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