Hitachi Relion 650 Series Technical Manual page 450

Section 18
Glossary
PCM
PCM600
PICS
PIO
PIXIT
PoW
PPS, 1PPS
Process bus
PSM
PST
PT ratio
PWC
RBAC
RISC
RJ-45
RMS value
RS422
RS485
RTC
RTU
Rx
SA
SBO
SCADA
SCD
SCL
SCS
SCT
SMT
SMS
SNTP
SPO
SST
Starpoint
SVC
SW
TC
444
Pulse code modulation
Protection and control IED manager
Protocol implementation conformance statement, for IEC 61850
Precision input/output module
Protocol implementation extra information for testing, for IEC 61850
Point on wave
One pulse per second, time synchronization interface
Bus or LAN used at the process level, that is, in near proximity to the measured
and/or controlled components
Power supply module
Parameter setting tool within PCM600
Potential transformer or voltage transformer ratio
Point-on-wave controller
Role-based access control (role-based security)
Reduced instruction set computer
Registered jack 45, commonly used as plug connector for electrical Ethernet
Root mean square value
A balanced serial interface for the transmission of digital data in point-to-point
connections
Serial link according to EIA standard RS485
Real-time clock
Remote terminal unit
Receive line
Substation Automation
Select-before-operate
Supervision, control and data acquisition
System configuration description file as per IEC 61850-6
System configuration language in IEC 61850
Station control system
System configuration tool according to standard IEC 61850
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.
Single-pole operated (circuit breaker), i.e. one drive for each pole.
Switchsync Setting Tool within PCM600
Neutral point of transformer or generator
Static VAr compensation
Software
Trip coil
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1MRK 511 557-UEN Rev. A
Technical Manual