Schweitzer Engineering Laboratories SEL-421-4 - Page 704

12.8
SEL-421 Relay Instruction Manual Date Code 20171021
Analog Quantities
MWHAT, MWHBT,
MWHCT
Total phase energy; Megawatt-hours Megawatt-hour [MWh] (primary)
NEW_SRC Selected high-accuracy time source N/A
NVS1M, NVS2M Voltage magnitude Volts [V] (secondary)
PA, PB, PC Real phase power Megawatts [MW] (primary)
PA_F, PB_F, PC_F Fundamental real power Megawatts [MW] (primary)
PAD, PBD, PCD Demand phase real power Megawatts [MW] (primary)
PAPKD, PBPKD, PCPKD Peak demand phase real power Megawatts [MW] (primary)
PCN01CV–PCN32CV Protection SEL
OGIC counter current value N/A
PCN01PV–PCN32PV Protection SEL
OGIC counter preset value N/A
PCT01–PCT32 Protection SEL
OGIC conditioning timer pickup time Cycles
PCT01DO–PCT32DO Protection SEL
OGIC conditioning timer dropout time Cycles
PFA, PFB, PFC Power factor (phase) N/A
PMV01–PMV64 Protection SEL
OGIC math variable N/A
PST01ET–PST32ET Protection SEL
OGIC sequencing timer elapsed time Cycles
PST01PT–PST32PT Protection SEL
OGIC sequencing timer preset time Cycles
PTPDSJI PTP 100PPS data stream jitter in µs µs
PTPMCC PTP master clock class enumerated value N/A
PTPOTJS Slow converging PTP ON TIME marker jitter in µs, fine accuracy µs
PTPOTJF Fast converging PTP ON TIME marker jitter in µs, coarse accuracy µs
PTPOFST Raw clock offset between PTP master and relay time ns
PTPPORT Active PTP port number N/A
PTPTBTW Time between PTP 100PPS pulses in µs µs
PTPSTEN PTP Port State enumerated value N/A
PTRY Y-Potential transformer ratio setting (divided by 1000) N/A
PTRZ Z-Potential transformer ratio setting (divided by 1000) N/A
QA_F, QB_F, QC_F Fundamental reactive power (phase) Megavars [MVAr] (primary)
QAD, QBD, QCD Demand phase reactive power Megavars [MVAr] (primary)
QAPKD, QBPKD,
QCPKD
Peak demand phase reactive power Megavars [MVAr] (primary)
RA001–RA256 Remote analogs N/A
RAO01–RAO64 Remote analog output N/A
RLYTEMP Relay temperature (temperature of the enclosure) °C (degrees Celsius)
RTCAA01–RTCAA08 Channel A remote synchrophasor analogs (unit depends on remote
synchrophasor contents)
N/A
RTCAP01–RTCAP32 Channel A remote synchrophasor phasors (unit depends on remote
synchrophasor contents)
N/A
RTCBA01–RTCBA08 Channel B remote synchrophasor analogs (unit depends on remote
synchrophasor contents)
N/A
RTCBP01–RTCBP32 Channel B remote synchrophasor phasors (unit depends on remote
synchrophasor contents)
N/A
RTCDFA Rate-of-change of Channel A remote frequency (from remote
synchrophasors)
Hertz/seconds [Hz/s]
Table 12.1 Analog Quantities Sorted Alphabetically (Sheet 8 of 12)
Label Description Unit