ABB REL650 Technical Manual page 937

1MRK 506 382-UEN A
Line distance protection REL650 2.2 IEC
Technical manual
RTU
SA
SBO
SC
SCL
SCS
SCADA
SCT
SDU
SFP
SLM
SMA connector
SMT
SMS
SNTP
SOF
SPA
SRY
ST
Starpoint
SVC
TC
TCS
TCP
TCP/IP
Remote terminal unit
Substation Automation
Select-before-operate
Switch or push button to close
Short circuit location
Station control system
Supervision, control and data acquisition
System configuration tool according to standard IEC
61850
Service data unit
Small form-factor pluggable (abbreviation)
Optical Ethernet port (explanation)
Serial communication module.
Subminiature version A, A threaded connector with
constant impedance.
Signal matrix tool within PCM600
Station monitoring system
Simple network time protocol – is used to synchronize
computer clocks on local area networks. This reduces the
requirement to have accurate hardware clocks in every
embedded system in a network. Each embedded node can
instead synchronize with a remote clock, providing the
required accuracy.
Status of fault
Strömberg Protection Acquisition (SPA), a serial master/
slave protocol for point-to-point and ring communication.
Switch for CB ready condition
Switch or push button to trip
Neutral point of transformer or generator
Static VAr compensation
Trip coil
Trip circuit supervision
Transmission control protocol. The most common
transport layer protocol used on Ethernet and the Internet.
Transmission control protocol over Internet Protocol. The
de facto standard Ethernet protocols incorporated into
4.2BSD Unix. TCP/IP was developed by DARPA for
Internet working and encompasses both network layer and
Section 24
Glossary
931