4.89
Date Code 20170814
Instruction Manual
SEL-700G Relay
Protection and Logic Functions
Group Settings (SET Command)
Torque Control switch position = Closed when the 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, 50NnT, or 67NnT Relay Word bits are asserted.
Figure 4.53
SEL-700G0, SEL-700G1, SEL-700GT+ Instantaneous Overcurrent Element Logic
(Generator Protection)
q
m = X or Y (Y-side elements apply to SEL-700G1 only).
n = 1, 2, or 3 (for phase overcurrent elements only).
50Pm3P
|IAm|
IAm
IBm
ICm
IN
PHROT
IGm
Current
Magnitude
Calculations
|IPm|
|IN|
|IGm|
50Pm3AP
50Pm3BP
|ICm|
50Pm3CP
50Pm3TC
50PmnP
50PmnT
Settings
(Maximum Phase Current Magnitude)
(Core-Balance Current Magnitude)
(Residual Current Magnitude 3I0m)
50PmnD
0
Negative-Sequence
Current Calculation
(Negative-Sequence Current Magnitude)
|3I2m|
50GYnP
50GYnT
50QmnP
50QmnT
50QmnD
0
50GYnD
0
|IAm|
|IBm|
(Phase A Current Magnitude)
(Phase B Current Magnitude)
(Phase C Current Magnitude)
|ICm|
50Pm3CT
|IBm|
50QmnP
50GYnP
50PmnP
|3I2m|
50QmnTC
|IGY|
50GYnTC
|IPm|
50PmnTC
50Pm3D
0
50Pm3D
0
50Pm3D
0
Relay
Word
Bits
50Pm3BT
50Pm3AT
50GXnTC
50GXnP
67GXnT
50GXnD
0
67GXnP
|IGX|
GXnDIR
1
Summary of Contents for SEL-700G Series
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