4.90
SEL-700G Relay
Instruction Manual
Date Code 20170814
Protection and Logic Functions
Group Settings (SET Command)
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, 50NnT or 67NnT Relay Word bits are asserted.
Figure 4.54
SEL-700GT Instantaneous Overcurrent Element Logic (Intertie Protection)
q
From Figure 4.90
w
From Figure 4.83
e
From Figure 4.89
50PY3P
|IAY|
IAY
IBY
ICY
IN
PHROT
IGY
Current
Magnitude
Calculations
|IPY|
|IN|
|IGY|
50PY3AP
50PY3BP
|ICY|
50PY3CP
50PY3TC
50PYnP
67PYnT
Settings
(Maximum Phase Current Magnitude)
(Core-Balance Current Magnitude)
(Residual Current Magnitude 3I0Y)
Negative-Sequence
Current Calculation
(Negative-Sequence Current Magnitude)
|3I2Y|
|IAY|
|IBY|
(Phase A Current Magnitude)
(Phase B Current Magnitude)
(Phase C Current Magnitude)
|ICY|
50PY3CT
|IBY|
67PYnP
|IPY|
50PYnTC
50PY3D
0
50PY3D
0
50PY3D
0
Relay
Word
Bits
50PY3BT
50PY3AT
50PYnD
0
PYnDIR
1
50QYnTC
67QYnT
50GYnP
67GYnT
67GYnP
|IGY|
50QYnP
|3I2Y|
50GYnTC
67QYnP
50GYnD
0
50QYnD
0
GYnDIR
2
QYnDIR
3
Summary of Contents for SEL-700G Series
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