Schweitzer Engineering Laboratories SEL-421-4 - Page 705

12.9
Date Code 20171021 Instruction Manual SEL-421 Relay
Analog Quantities
RTCDFB Rate-of-change of Channel B remote frequency (from remote
synchrophasors)
Hertz/seconds [Hz/s]
RTCFA Channel A remote frequency (from remote synchrophasors) Hertz [Hz]
RTCFB Channel B remote frequency (from remote synchrophasors) Hertz [Hz]
RTD01–RTD12 Instantaneous temperatures from external SEL-2600 °C (degrees Celsius)
SA_F, SB_F, SC_F Fundamental apparent power (phase) Megavolt-amperes [MVA]
(primary)
SCV Unfiltered swing center voltage Per unit (pu)
SERDSJI Serial port 100 PPS data stream jitter µs
SEROTJF Fast converging serial port ON TIME marker jitter, coarse accuracy µs
SEROTJS Slow converging serial port ON TIME marker jitter, fine accuracy µs
SERTBTW Time between serial 100 PPS pulses µs
SHOT1_1 Total number of 1st shot single-pole recloses N/A
SHOT1_2 Total number of 2nd shot single-pole recloses N/A
SHOT1_T Total number of single-pole reclosing shots Issued N/A
SHOT3_1 Total number of 1st shot three-pole recloses N/A
SHOT3_2 Total number of 2nd shot three-pole recloses N/A
SHOT3_3 Total number of 3rd shot three-pole recloses N/A
SHOT3_4 Total number of 4th shot three-pole recloses N/A
SHOT3_T Total number of three-pole recloses N/A
SLIP1, SLIP2 Slip (fs1/2-fp) Hertz [Hz]
SODPM Second of day of the synchrophasor data packet Seconds [s]
SODPMD Second of day of the synchrophasor data packet, delayed for RTC
alignment
Seconds [s]
SPSHOT Present value of single-pole shot counter N/A
SQUAL IRIG-B synchronization accuracy µs
TE Time error Seconds (s)
TECORR
b
Time error correction preload value Seconds (s)
THR UTC time, hour (0–23) Hour (hr)
TLHR Local time, hour (0–23) Hour (hr)
TLMIN Local time, minute (0–59) Minutes (min)
TLMSEC Local time, milliseconds (0–999) Milliseconds (ms)
TLNSEC Local time, nanoseconds (0–999999) Nanoseconds (ns)
TLODMS Local time of day, milliseconds (0–86400000) Milliseconds (ms)
TLSEC Local time, seconds (0–59) Seconds (s)
TMIN UTC time, minute (0–59) Minutes (min)
TMSEC UTC time, milliseconds (0–999) Milliseconds (ms)
TNSEC UTC time, nanoseconds (0–999999) Nanoseconds (ns)
TODMS UTC time of day in milliseconds (0–86400000) Milliseconds (ms)
TQUAL Worst case IRIG-B clock time error Seconds (s)
TSEC UTC time, seconds (0–59) Seconds (s)
TUTC Offset from IRIG-B time to UTC time Hour
Table 12.1 Analog Quantities Sorted Alphabetically (Sheet 9 of 12)
Label Description Unit