Schweitzer Engineering Laboratories SEL-751 - Page 885

K.15
Date Code 20170927 Instruction Manual SEL-751 Relay
Relay Word Bits
Definitions
ER Event report trigger SELOGIC control equation
33
FAULT Indicates fault condition. Asserts when SELOGIC control equation FAULT result is logical 1.
13
FDIRC Forward directional element for Petersen coil incremental conductance
152
FDIRI Forward channel in current-polarized directional element
127
FDIRN Forward directional element for low-impedance grounded, Petersen coil-grounded, or
ungrounded/high-impedance grounded systems
153
FDIRNI ORed forward directional logic
151
FDIRP Forward positive-sequence voltage-polarized directional element
126
FDIRQ Forward negative-sequence voltage-polarized directional element
126
FDIRQG Forward negative-sequence voltage-polarized directional element
126
FDIRV Forward zero-sequence voltage-polarized directional element
126
FDIRW Forward directional output for Petersen coil wattmetric element
152
FIDEN Fault identification logic enabled
140
FREQFZ Synchrophasor bit that asserts if the measured frequency > ±20 Hz from nominal
117
FREQTRK Frequency tracking enable bit—tracking enabled when bit is asserted
33
FRZCLRA A-phase average freeze and trending clear condition
137
FRZCLRB B-phase average freeze and trending clear condition
137
FRZCLRC C-phase average freeze and trending clear condition
137
FSA A-phase fault selection
140
FSB B-phase fault selection
140
FSC C-phase fault selection
140
G1DIR Directional control for elements 67G1P, 51G1P, and 51G2P
128
G2DIR Directional control for element 67G2P
128
G3DIR Directional control for element 67G3P
128
G4DIR Directional control for element 67G4P
128
GFLT Ground fault (pulse for (LER – PRE – 0.75) cycles)
131
GNDEM Zero-sequence current demand pickup
113
GNDSW Directional element for low-impedance grounded or ungrounded/high-impedance grounded
systems is operating on neutral channel (IN) current
153
HALARM Diagnostics failure
26
HBL2AT A-phase second-harmonic block timed out
150
HBL2BT B-phase second-harmonic block timed out
150
HBL2CT C-phase second-harmonic block timed out
150
HBL2T Combined-phase second-harmonic block timed out
150
HBL5AT A-phase fifth-harmonic block timed out
150
Table K.2 Relay Word Bit Definitions for the SEL-751 Relay (Sheet 10 of 17)
Bit Definition Row