Sel 421 - Page 35

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Date Code 20090715 SEL-421 Relay
Preface
Manual Overview
Section 7: Direct Network Communication. Explains how to use DNP3
(serial and LAN/WAN) and other Ethernet protocols such as Telnet,
FTP, and IEC 61850.
Reference Manual
Section 1: Protection Functions. Describes the function of various relay
protection elements; describes how the relay processes these elements;
gives detailed specifics on protection scheme logic for POTT, DCB,
DCUB, and DTT; provides trip logic diagrams, and current and
voltage source selection details.
Section 2: Auto-Reclosing and Synchronism Check. Explains how to
operate the SEL-421 two-circuit breaker multi-shot recloser; describes
how to set the SEL-421 for single-pole reclosing, three-pole reclosing,
or both; shows selection of the lead and follow circuit breakers;
explains how to set and apply synchronism-check elements for
automatic and manual closing.
Section 3: SELOGIC Control Equation Programming. Describes multiple
setting groups and SEL
OGIC control equations and how to apply these
equations; discusses expanded SEL
OGIC control equation features
such as PLC-style commands, math functions, counters, and
conditioning timers; provides a tutorial for converting older format
SEL
OGIC control equations to new free-form equations.
Section 4: Communications Interfaces. Explains the physical connection
of the SEL-421 to various communications network topologies.
Section 5: SEL Communications Protocols. Describes the various SEL
software protocols and how to apply these protocols to substation
integration and automation; includes details about SEL ASCII, SEL
Compressed ASCII, SEL Fast Meter, SEL Fast Operate, SEL Fast
SER, and enhanced M
IRRORED BITS
®
communications.
Section 6: DNP3 Communications. Describes the DNP3 communications
protocol and how to apply this protocol to substation integration and
automation; provides a Job Done
®
example for implementing DNP3 in
a substation.
Section 7: Synchrophasors. Describes the Phasor Measurement Unit
(PMU) functions of the SEL-421; provides details on synchrophasor
measurement; describes the IEEE C37.118 synchrophasor protocol
settings; describes the SEL Fast Message synchrophasor protocol
settings.
Section 8: IEC 61850 Communications. Describes the IEC 61850 protocol
and how to apply this protocol to substation automation and
integration. Includes IEC 61850 protocol compliance statements.
Section 9: ASCII Command Reference. Provides an alphabetical listing of
all ASCII commands with examples for each ASCII command option.
Section 10: Settings. Provides a list of all SEL-421 settings and defaults.
The organization of the settings is similar to the settings organization
in the relay and in the
ACSELERATOR QuickSet software.
Appendix A: Relay Word Bits. Contains a summary of Relay Word bits.
Appendix B: Analog Quantities. Contains a summary of analog quantities.
CD-ROM
The CD-ROM contains the SEL-421 Relay Manual in an electronic form that
you can search easily.
Courtesy of NationalSwitchgear.com