4.91
Date Code 20170814
Instruction Manual
SEL-700G Relay
Protection and Logic Functions
Group Settings (SET Command)
m = X or Y; n = 1, 2, or 3 (for phase overcurrent elements only).
Torque Control switch position = Closed when corresponding control bit is asserted (e.g., 50PY3TC = 1);
open when it is deasserted.
Not shown in the figure, Relay Word bit ORED50T is asserted if any of the 50Pm3AT, 50Pm3BT, 50Pm3CT,
50PmnT, 67PYnT, 50QmnT, 50GmnT, 67GmnT, or 50NnT Relay Word bits are asserted.
Figure 4.55
Instantaneous Overcurrent Element Logic (Feeder Protection, SEL-700GW)
50Pm3P
|IAm|
IAm
IBm
ICm
PHROT
IGm
Current
Magnitude
Calculations
|IPm|
|IGm|
50Pm3AP
50Pm3BP
|ICm|
50Pm3CP
50Pm3TC
50PmnP
Settings
(Maximum Phase Current Magnitude)
(Residual Current Magnitude 3I0m)
50PmnD
0
Negative-Sequence
Current Calculation
(Negative-Sequence Current Magnitude)
|3I2m|
50GmnP
50GmnT
50QmnP
50QmnT
50QmnD
0
50GmnD
0
|IAm|
|IBm|
(Phase A Current Magnitude)
(Phase B Current Magnitude)
(Phase C Current Magnitude)
|ICm|
50Pm3CT
|IBm|
50QmnP
50GmnP
|3I2m|
50QmnTC
|IGm|
50GmnTC
|IPm|
50PmnTC
50Pm3D
0
50Pm3D
0
50Pm3D
0
Relay
Word
Bits
50Pm3BT
50Pm3AT
50PmnT
50PmnP
Summary of Contents for SEL-700G Series
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