L.3
Date Code 20170927 Instruction Manual SEL-751 Relay
Analog Quantities
DFDT Frequency rate-of-change Hz/sec. x x x
VDC Station dc battery voltage Vdc xxxx xx x
I1_MAG Positive-sequence current A pri xxxx x x
I1_ANG Angle of positive-sequence current degrees x x x x x
V1_MAG Positive-sequence voltage V pri xxxx x x
V1_ANG Angle of positive-sequence voltage degrees x x x x x
Fau lt Info rmation
Note1: When a fault location is undefined, the relay will report -999.9 for FLOC and FZ in all protocols except MODBUS, where
FZ will be 6553.5. When a fault location is undefined, the relay will report 0 for FZFA in all protocols except MODBUS,
where FZFA will be 180.00.
Note2: The fault location is a unit less quantity and depends on the units used for entering LL. IEC 61850/DNP/60870 assume
the location is in km.
Note3: The fault location analogs are reported as part of Event History data in Modbus and have different labels.
Note4: If the relay is restarted (cold start), Event Report information will be reset until a new Event Record is generated.
Note5: All fault location analogs contain data from the latest event except for the fault location analogs used in MODBUS. The
fault location analogs in the MODBUS map contain the data from the event selected by writing the event number from
the History response (See Section 10: Analyzing Events) into the Event Log Select register (See Appendix E: Modbus
RTU Communications).
FLOC
1,
2,
3
Fault location of the most recent fault; for
IEC 60870 fault analogs, fault location of fault
event
xx x x x
FIA
3
A-phase current of the most recent fault event;
for IEC 60870 fault analogs, A-phase current of
fault event
A pri x x x x x
FIB
3
B-phase current of the most recent fault event;
for IEC 60870 fault analogs, B-phase current of
fault event
A pri x x x x x
FIC
3
C-phase current of the most recent fault event;
for IEC 60870 fault analogs, C-phase current of
fault event
A pri x x x x x
FIG
3
Ground current of the most recent fault event;
for IEC 60870 fault analogs, ground current of
fault event
A pri x x x x x
FIN
3
Neutral fault current of the most recent fault
event; for IEC 60870 fault analogs, neutral
current of fault event
A pri x x x x x
FFREQ
3
Frequency of the most recent fault; for
IEC 60870 fault analogs, frequency of fault
event
Hz x x x x x
FZ
1,
3
Fault impedance magnitude of the most recent
fault; for IEC 60870, fault impedance
magnitude of the fault event
ohm s x x x x x
FZFA
1,
3
Fault impedance angle of the most recent fault;
for IEC 60870, fault impedance angle of the
fault event
degrees x x x x x
FLRNUM
4
Unique Identification number of the latest event x
FLREP
4
Event Report Present (shall be 1 when an event
report is present, and 0 otherwise
x
HIFLRNUM
4
Unique Identification number of the latest HIF
event
x
HIFLREP
4
HIF Event Report Present (shall be 1 when an
HIF event report is present, and 0 otherwise)
x
Table L.1 Analog Quantities (Sheet 3 of 8)
Name Description Units
Display Points
SELOGIC
Load Profile
DNP3/Fast Message Read/
IEC 60870-5-103
Modbus
Fast Meter
IEC 61850
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