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9
Introduction to the installation and
commissioning manual
Chapter 1
Introduction
PCM
Pulse code modulation
PISA
Process interface for sensors & actuators
PLD
Programmable Logic Device
PMC
POTT
Permissive overreach transfer trip
PPS
Precise Positioning System
Process bus
Bus or LAN used at the process level, that is, in near proximity to the
measured and/or controlled components
PSM
Power supply module
PST
Parameter setting tool
PT ratio
Potential transformer or voltage transformer ratio
PUTT
Permissive underreach transfer trip
R1A
Source resistance A (near end)
R1B
Source resistance B (far end)
RADSS
Resource Allocation Decision Support System
RASC
Synchrocheck relay, from COMBIFLEX range.
RCA
Functionality characteristic angle
REVAL
Evaluation software
RFPP
Resistance of phase-to-phase faults
RFPE
Resistance of phase-to-earth faults
RISC
Reduced instruction set computer
RMS value
Root mean square value
RS422
A balanced serial interface for the transmission of digital data in
point-to-point connections
RS485
Serial link according to EIA standard RS485
RS530
A generic connector specification that can be used to support RS422,
V.35 and X.21 and others
RTU
Remote Terminal Unit
RTC
Real Time Clock
SA
Substation Automation
SC
Switch or push-button to close
SCS
Station control system
SLM
Serial communication module. Used for SPA/LON/IEC communication
SMA connector
Sub Miniature version A connector
SMS
Station monitoring system
SPA
Strömberg Protection Acquisition, a serial master/slave protocol for
point-to-point communication
Summary of Contents for REB 551-C3*2.5
Page 9: ...Contents ...
Page 21: ...12 Introduction to the installation and commissioning manual Chapter 1 Introduction ...
Page 27: ...18 Note signs Chapter 2 Safety information ...
Page 53: ...44 Installing the 56 64 kbit data communication cables Chapter 5 Installing the terminal ...
Page 59: ...50 Checking the binary I O circuits Chapter 6 Checking the external circuitry ...
Page 147: ...138 Repair support Chapter 16 Fault tracing and repair ...