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Introduction to the technical reference manual Chapter 1
Introduction
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
SPGGIO Single Point Gxxxxx Generic Input/Output
SRY Switch for CB ready condition
ST3UO RMS voltage at neutral point
STL1 Start signal from phase L1
ST Switch or push-button to trip
SVC Static VAr compensation
t1 1Ph Open time for shot 1, single phase
t1 3PhHS Open time for shot 1, high speed reclosing three phase
tAutoContWait Wait period after close command before next shot
tCBCLosedMin Minimum time that the circuit breaker must be closed before new
sequence is permitted
tExtended t1 Open time extended by this value if Extended t1 is true
THL Thermal Overload Line cable
THOL Thermal overload
tInhibit Reset reclosing time for inhibit
tPulse Pulse length for single command outputs
TP Logic Pulse Timer
tReporting Cycle time for reporting of counter value
tRestore Restore time delay
TCS Trip circuit supervision
TNC connector Type of bayonet connector, like BNC connector
TPZ, TPY, TPX, TPS Current transformer class according to IEC
tReclaim Duration of the reclaim time
TRIPENHA Trip by enhanced restrained differential protection
TRIPRES Trip by restrained differential protection
TRL1 Trip signal from phase 1
truck Isolator with wheeled mechanism
tSync Maximum wait time for synchrocheck OK
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