ABB RELION 620 Series Technical Manual page 930

Section 18
Glossary
924
PPS
PRP
RAM
RCA
RJ-45
RMS
ROM
RSTP
RTC
RTD
RTS
SAN
SBO
SCL
Single-line diagram
SMT
SNTP
SOTF
ST
SW
TCM
TCP
TCP/IP
TCS
UDP
UL
UTC
VDR
VT
Pulse per second
Parallel redundancy protocol
Random access memory
Also known as MTA or base angle. Characteristic angle.
Galvanic connector type
Root-mean-square (value)
Read-only memory
Rapid spanning tree protocol
Real-time clock
Resistance temperature detector
Ready to send
Single attached node
Select-before-operate
XML-based substation description configuration language
defined by IEC 61850
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.
Signal Matrix tool in PCM600
Simple Network Time Protocol
Switch onto fault
Connector type for glass fiber cable
Software
Trip-circuit monitoring
Transmission Control Protocol
Transmission Control Protocol/Internet Protocol
Trip-circuit supervision
User datagram protocol
Underwriters Laboratories
Coordinated universal time
Voltage-depended resistor
Voltage transformer
1MAC504801-IB E
620 series ANSI
Technical Manual