ABB Relion REC670 Applications Manual page 478

Section 23
Glossary
SCL
SCS
SCADA
SCT
SDU
SELV circuit
SFP
SLM
SMA connector
SMT
SMS
SNTP
SOF
SPA
SRY
ST
Starpoint
SVC
TC
TCS
TCP
TCP/IP
TEF
TLS
TM
TNC connector
TP
TPZ, TPY, TPX, TPS
472
Short circuit location
Station control system
Supervision, control and data acquisition
System configuration tool according to standard IEC 61850
Service data unit
Safety Extra-Low Voltage circuit type according to IEC60255-27
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 transport layer protocols. While TCP and IP specify
two protocols at specific protocol layers, TCP/IP is often used to refer
to the entire US Department of Defense protocol suite based upon
these, including Telnet, FTP, UDP and RDP.
Time delayed earth-fault protection function
Transport Layer Security
Transmit (disturbance data)
Threaded Neill-Concelman, a threaded constant impedance version of a
BNC connector
Trip (recorded fault)
Current transformer class according to IEC
1MRK 511 358-UEN A
Application manual