11.19
Date Code 20171021 Instruction Manual SEL-421 Relay
Relay Word Bits
Alphabetical List
FOP3_01–FOP3_08 Fast-operate output control bits for Port 3, Bit 1–8 328
FOP3_09–FOP3_16 Fast-operate output control bits for Port 3, Bit 9–16 329
FOP3_17–FOP3_24 Fast-operate output control bits for Port 3, Bit 17–24 330
FOP3_25–FOP3_32 Fast-operate output control bits for Port 3, Bit 25–32 331
FOPF_01–FOPF_08 Fast-operate output control bits for Port F, Bit 1–8 316
FOPF_09–FOPF_16 Fast-operate output control bits for Port F, Bit 9– 317
FOPF_17–FOPF_24 Fast-operate output control bits for Port F, Bit 17–24 318
FOPF_25–FOPF_32 Fast-operate output control bits for Port F, Bit 25–32 319
FREQFZ Assert if relay is not calculating frequency 210
FREQOK Assert if relay is estimating frequency 210
FROKPM Synchrophasor frequency 288
FSA A-Phase sector fault (AG or BCG fault) 51
FSB B-Phase sector fault (BG or CAG fault) 52
FSC C-Phase sector fault (CG or ABG fault) 52
FSERP1–FSERP3 Fast SER enabled for Serial Port 1–3 268
FSERP5 Fast SER enabled for EN and FO ports 268
FSERPF Fast SER enabled for Serial Port F 268
GDEM Zero-sequence demand current picked up 90
GROUND Indicates a ground fault 224
GRPSW Pulsed alarm for group switches 206
HALARM Hardware alarm 206
HALARMA Pulse stream for unacknowledged diagnostic warnings 206
HALARML Latched alarm for diagnostic failures 206
HALARMP Pulsed alarm for diagnostic warnings 206
HSDGF Ground fault, high-speed forward directional element 285
HSDGR Ground fault, high-speed reverse directional element 285
HSDQF Phase-to-phase fault, high-speed forward directional element 285
HSDQR Phase-to-phase fault, high-speed reverse directional element 285
ILOP Internal loss-of-potential from ELOP setting 51
IN101–IN107 Main Board Input 1–7 104
IN201–IN208 First optional I/O board Input 1–8 (if installed) 108
IN209–IN216 First optional I/O board Input 9–16 (if installed) 109
IN217–IN224 First optional I/O board Input 17–24 (if installed) 110
IN301–IN308 Second optional I/O board Input 1–8 (if installed) 112
IN309–IN316 Second optional I/O board Input 9–16 (if installed) 113
IN317–IN324 Second optional I/O board Input 17–24 (if installed) 114
IN401–IN408 Third optional I/O board Input 1–8 (if installed) 404
IN409–IN416 Third optional I/O board Input 9–16 (if installed) 405
IN417–IN424 Third optional I/O board Input 17–24 (if installed) 406
IN501–IN508 Fourth optional I/O board Input 1–8 (if installed) 408
IN509–IN516 Fourth optional I/O board Input 9–16 (if installed) 409
Table 11.1 Alphabetic List of Relay Word Bits (Sheet 19 of 34)
Name Description Row
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