12.19
Date Code 20171021 Instruction Manual SEL-421 Relay
Analog Quantities
TLSEC Local time, seconds (0–59) Seconds (s)
DDOW UTC date, day of the week (1–SU,..., 7–SA) Day
DDOM UTC date, day of the month (1–31) Day
DDOY UTC date, day of the year (1–366) Day
DMON UTC date, month (1–12) Month
DYEAR UTC date, year (2000–2200) Year
Reclosing Relay
SPSHOT Present value of single-pole shot counter N/A
3PSHOT Present value of three-pole shot counter N/A
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
Fault Location
FLOC Fault location Per unit (pu)
Contact Inputs
IN201A–IN208A Digital input values available as floating point quantities 0.0–255.0 A/D Counts
IN301A–IN308A Digital input values available as floating point quantities 0.0–255.0 A/D Counts
IN201V–IN208V Contact input A/D counts converted to calibrated voltage V
IN301V–IN308V Contact input A/D counts converted to calibrated voltage V
RTD
RTD01–RTD12 Instantaneous temperatures from external SEL-2600 °C (degrees Celsius)
IRIG-B Control Function Bits for Synchrophasor Measurement
TUTC Offset from IRIG-B time to UTC time Hour
TQUAL Worst case IRIG-B clock time error Seconds [s]
NEW_SRC Selected high-accuracy time source N/A
CUR_SRC Current high-accuracy time source N/A
SQUAL IRIG-B synchronization accuracy µs
BNCDSJI BNC port 100 PPS data stream jitter µs
BNCTBTW Time between BNC 100 PPS pulses µs
SERTBTW Time between serial 100 PPS pulses µs
BNCOTJS Slow converging BNC port ON TIME marker jitter, fine accuracy µs
BNCOTJF Fast converging BNC port ON TIME marker jitter, coarse accuracy µs
SERDSJI Serial Port 100 PPS data stream jitter µs
SEROTJS Slow converging serial port ON TIME marker jitter, fine accuracy µs
SEROTJF Fast converging serial port ON TIME marker jitter, coarse accuracy µs
Table 12.2 Analog Quantities Sorted by Function (Sheet 8 of 13)
Labels Description Unit
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