Schweitzer Engineering Laboratories SEL-421-4 - Page 453

6.117
Date Code 20171021 Instruction Manual SEL-421 Relay
Protection Applications Examples
EHV Parallel 230 kV Underground Cables Example
k0M Forward Zones ZSC Factor Magnitude (0.000–10) 6.105
k0A Forward Zones ZSC Factor Angle (–180.0 to +180
degrees)
44.5
k0MR Reverse Zones ZSC Factor Magnitude (0.000–10) 6.105
k0AR Reverse Zones ZSC Factor Angle
(–180.0 to +180 degrees)
44.5
Ground-Distance Element Time Delay (Group)
Z1GD Zone 1 Time Delay (OFF, 0.000–16000 cycles) OFF
Z2GD Zone 2 Time Delay (OFF, 0.000–16000 cycles) OFF
Z3GD Zone 3 Time Delay (OFF, 0.000–16000 cycles) OFF
Distance Element Common Time Delay (Group)
Z1D Zone 1 Time Delay (OFF, 0.000–16000 cycles) 0.000
Z2D Zone 2 Time Delay (OFF, 0.000–16000 cycles) 20.000
Z3D Zone 3 Time Delay (OFF, 0.000–16000 cycles) 0.000
SOTF Scheme (Group)
ESPSTF Single-Pole Switch-Onto-Fault (Y, N) N
EVRST Switch-Onto-Fault Voltage Reset (Y, N) Y
VRSTPU Switch-Onto-Fault Reset Voltage (0.60–1.00 pu) 0.60–1.00 pu
52AEND 52A Pole Open Time Delay
(OFF, 0.000–16000 cycles)
OFF
CLOEND CLSMON or Single Pole Open Delay
(OFF, 0.000–16000 cycles)
10.000
SOTFD Switch-Onto-Fault Enable Duration
(0.500–16000 cycles)
10.000
CLSMON Close Signal Monitor (SEL
OGIC Equation) IN102
Phase Instantaneous Overcurrent Pickup (Group)
50P1P Level 1 Pickup (OFF, 0.25–100 A secondary) 9.57
Phase Overcurrent Definite-Time Delay (Group)
67P1D Level 1 Time Delay (0.000–16000 cycles) 0.000
Phase Overcurrent Torque Control (Group)
67P1TC Level 1 Torque Control (SELOGIC Equation) 1
Negative-Sequence Instantaneous Overcurrent Pickup (Group)
50Q1P Level 1 Pickup (OFF, 0.25–100 A secondary) OFF
50Q2P Level 2 Pickup (OFF, 0.25–100 A secondary) 0.60
50Q3P Level 3 Pickup (OFF, 0.25–100 A secondary) 0.40
Negative-Sequence Overcurrent Definite-Time Delay (Group)
67Q2D Level 2 Time Delay (0.000–16000 cycles) 0.000
67Q3D Level 3 Time Delay (0.000–16000 cycles) 0.000
Negative-Sequence Overcurrent Torque Control (Group)
67Q2TC Level 2 Torque Control (SELOGIC Equation) 32GF
67Q3TC Level 3 Torque Control (SEL
OGIC Equation) 32GR
Table 6.31 Settings for 230 kV Parallel Cables Example (Sheet 3 of 5)
Setting Prompt Entry