Schweitzer Engineering Laboratories SEL-421-4 - Table 5.59 Negative-Sequence Instantaneous;Definite-Time Line Overcurrent Relay Word Bits; Table 5.58 Phase Instantaneous;Definite-Time Line Overcurrent Relay Word Bits; Table 5.57 Residual Ground Overcurrent Element Settings

5.95
Date Code 20171021 Instruction Manual SEL-421 Relay
Protection Functions
Instantaneous Line Overcurrent Elements
NOTE: If the relay is using a remote
data acquisition system, such as TiDL,
the operating times will be delayed by
1.5 ms. Use caution when setting the
relay coordination times to account
for this added delay.
Table 5.57 Residual Ground Overcurrent Element Settings
Setting Prompt Range
Default
(5 A)
Residual Ground Instantaneous Overcurrent Elements
E50G Residual Ground Inst./Def.-Time
O/C Elements
N, 1–4 N
50G1P Level 1 Pickup (A) OFF, (0.05–20) • I
NOM
OFF
50G2P Level 2 Pickup (A) OFF, (0.05–20) • I
NOM
OFF
50G3P Level 3 Pickup (A) OFF, (0.05–20) • I
NOM
OFF
50G4P Level 4 Pickup (A) OFF, (0.05–20) • I
NOM
OFF
Residual Ground Definite-Time Overcurrent Elements
67G1D Level 1 Time Delay (cycles) 0.000–16000 0.000
67G2D Level 2 Time Delay (cycles) 0.000–16000 0.000
67G3D Level 3 Time Delay (cycles) 0.000–16000 0.000
67G4D Level 4 Time Delay (cycles) 0.000–16000 0.000
67G1TC Level 1 Torque Control SEL
OGIC Equation 1
67G2TC Level 2 Torque Control SEL
OGIC Equation 1
67G3TC Level 3 Torque Control SEL
OGIC Equation 1
67G4TC Level 4 Torque Control SEL
OGIC Equation 1
Table 5.58 Phase Instantaneous/Definite-Time Line Overcurrent Relay Word Bits
Name Description
50P1 Level 1 instantaneous phase overcurrent element
50P2 Level 2 instantaneous phase overcurrent element
50P3 Level 3 instantaneous phase overcurrent element
50P4 Level 4 instantaneous phase overcurrent element
67P1 Level 1 definite-time phase directional overcurrent element
67P2 Level 2 definite-time phase directional overcurrent element
67P3 Level 3 definite-time phase directional overcurrent element
67P4 Level 4 definite-time phase directional overcurrent element
67P1T Level 1 time-delayed definite-time phase directional overcurrent element
67P2T Level 2 time-delayed definite-time phase directional overcurrent element
67P3T Level 3 time-delayed definite-time phase directional overcurrent element
67P4T Level 4 time-delayed definite-time phase directional overcurrent element
Table 5.59 Negative-Sequence Instantaneous/Definite-Time Line Overcurrent
Relay Word Bits (Sheet 1 of 2)
Name Description
50Q1 Level 1 instantaneous negative-sequence overcurrent element
50Q2 Level 2 instantaneous negative-sequence overcurrent element
50Q3 Level 3 instantaneous negative-sequence overcurrent element
50Q4 Level 4 instantaneous negative-sequence overcurrent element
67Q1 Level 1 definite-time negative-sequence directional overcurrent element
67Q2 Level 2 definite-time negative-sequence directional overcurrent element
NOTE: If the relay is using a remote
data acquisition system, such as TiDL,
the operating times will be delayed by
1.5 ms. Use caution when setting the
relay coordination times to account
for this added delay.