Sel SEL-787 - Page 20

xviii
SEL-787 Relay Instruction Manual Date Code 20150130
Preface
Safety Information
Appendix D: DNP3 Communications. Describes the DNP3 protocol support
provided by the SEL-787.
Appendix E: Modbus RTU Communications. Describes the Modbus
®
protocol support provided by the SEL-787.
Appendix F: IEC 61850 Communications. Describes IEC 61850
implementation in the SEL-787.
Appendix G: DeviceNet Communications. Describes the use of DeviceNet
(data-link and application protocol) over CAN (hardware protocol).
Appendix H: Synchrophasors. Describes the Phasor Measurement Control
Unit (PMCU), and accessing Synchrophasor data via ASCII
Command (MET PM) and IEEE C37.118 Protocol.
Appendix I: MIRRORED BITS Communications. Describes how SEL protective
relays and other devices can directly exchange information quietly,
securely, and with minimum cost.
Appendix J: Relay Word Bits. Lists and describes the Relay Word bits
(outputs of protection and control elements).
Appendix K: Analog Quantities. Lists and describes the Analog Quantities
(outputs of analog elements).
SEL-787 Relay Command Summary. Briefly describes the serial port
commands that are fully described in Section 7: Communications.
Safety Information
Dangers, Warnings,
and Cautions
This manual uses three kinds of hazard statements, defined as follows:
Safety Symbols
The following symbols are often marked on SEL products.
DANGER
Indicates an imminently hazardous situation
that, if not avoided, will result in death or
serious injury.
WARNING
Indicates a potentially hazardous situation
that, if not avoided, could result in death or
serious injury.
CAUTION
Indicates a potentially hazardous situation
that, if not avoided, may result in minor or
moderate injury or equipment damage.
CAUTION
Refer to accompanying documents.
ATTENTION
Se reporter à la documentation.
Earth (ground) Terre
Protective earth (ground) Terre de protection
Direct current Courant continu