K.19
Date Code 20170927 Instruction Manual SEL-751 Relay
Relay Word Bits
Definitions
Q1DIR Directional control for element 67Q1P and 51QP
128
Q2DIR Directional control for element 67Q2P
128
Q3DIR Directional control for element 67Q3P
128
Q4DIR Directional control for element 67Q4P
128
RB01–RB08 Remote bits 1–8
43
RB09–RB16 Remote bits 9–16
44
RB17–RB24 Remote bits 17–24
45
RB25–RB32 Remote bits 25–32
46
RBADA Channel A, outage duration over threshold
96
RBADB Channel B, outage duration over threshold
96
RCSF Reclose supervision failure (asserts for ¼ cycle)
31
RDIRC Forward directional element for Petersen coil incremental conductance
152
RDIRI Reverse channel IN current-polarized directional element
127
RDIRN Reverse directional element for low-impedance grounded Petersen coil-grounded or
ungrounded/high-impedance grounded systems
153
RDIRNI ORed reverse directional logic
151
RDIRP Reverse positive-sequence voltage-polarized directional element
126
RDIRQ Reverse negative-sequence voltage-polarized directional element
126
RDIRQG Reverse negative-sequence voltage-polarized directional element
126
RDIRV Reverse zero-sequence voltage-polarized directional element
126
RDIRW Reverse directional output for Petersen coil wattmetric element
152
RELAY_EN Relay data quality flag
35
REMTRIP Remote trip
14
RMB1A–RMB8A Channel A receive M
IRRORED BITS RMB1A through RMB8A
92
RMB1B–RMB8B Channel B receive M
IRRORED BITS RMB1B through RMB8B
94
ROKA Channel A, received data ok
96
ROKB Channel B, received data ok
96
RSTDEM Reset demand meter
25
RSTENRGY Reset energy metering. Asserts when the SEL
OGIC control equation RSTENRG result is
logical 1.
25
RSTMN Reset timer is timing
31
RSTMXMN Reset Max/Min metering. Asserts when the SEL
OGIC control equation RSTMXMN result is
logical 1.
25
RSTPKDEM Reset peak demand meter
25
RSTTH1 Thermal Element 1 reset
148
RSTTH2 Thermal Element 2 reset
148
Table K.2 Relay Word Bit Definitions for the SEL-751 Relay (Sheet 14 of 17)
Bit Definition Row
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