iv Appendices Table of Contents Date Code 20001006
SEL-351 Instruction Manual
FIGURES
Figure F.1: Minimum Response Time Added to a Negative-Sequence Time-Overcurrent Element
51QT ........................................................................................................................ F-2
Figure F.2: Distribution Feeder Protective Devices .............................................................................. F-3
Figure F.3: Traditional Phase Coordination ......................................................................................... F-4
Figure F.4: Phase-to-Phase Fault Coordination.................................................................................... F-5
Figure F.5: Negative-Sequence Overcurrent Element Derived from “Equivalent” Phase
Overcurrent Element, 51EP ....................................................................................... F-6
Figure G.1: Result of Rising Edge Operators on Individual Elements in Setting ER..............................G-6
Figure G.2: Result of Falling Edge Operator on a Deasserting Underfrequency Element .......................G-7
Courtesy of NationalSwitchgear.com
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