PTP Precision Time Protocol
RAM Random access memory
RCA Also known as MTA or base angle. Characteristic
angle.
RJ-45 Galvanic connector type
RMS Root-mean-square (value)
ROM Read-only memory
RSTP Rapid spanning tree protocol
RTC Real-time clock
RTD Resistance temperature detector
RTS Ready to send
SAN Single attached node
SBO Select-before-operate
SCADA Supervision, control and data acquisition
SCL XML-based substation description configuration
language defined by IEC 61850
Single-line diagram Simplified notation for representing a three-phase
power system. Instead of representing each of three
phases with a separate line or terminal, only one
conductor is represented.
SMT
Signal Matrix tool in PCM600
SMV Sampled measured values
SNTP Simple Network Time Protocol
SOTF Switch onto fault
ST Connector type for glass fiber cable
SW Software
TCP/IP Transmission Control Protocol/Internet Protocol
TCS Trip-circuit supervision
TLV Type length value
UTC Coordinated universal time
VT Voltage transformer
WAN Wide area network
WHMI Web human-machine interface
Section 17 1MRS758755 A
Glossary
796 REC615 and RER615
Technical Manual
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