Schweitzer Engineering Laboratories SEL-421-4 - Page 385

6.49
Date Code 20171021 Instruction Manual SEL-421 Relay
Protection Applications Examples
500 kV Parallel Transmission Lines With Mutual Coupling Example
Relay Configuration (Group)
E21P Mho Phase Distance Zones (N, 1–5) 3
E21MG Mho Ground Distance Zones (N, 1–5) 3
E21XG Quadrilateral Ground Distance Zones (N, 1–5) 3
ECVT Cvt Transient Detection (Y, N) N
ESERCMP Series-Compensated Line Logic (Y, N) N
ECDTD Distance Element Common Time Delay (Y, N) Y
ESOTF Switch-Onto-Fault (Y, N) Y
EOOS Out-Of-Step (Y, Y1, N) N
ELOAD Load Encroachment (Y, N) N
E50P Phase Inst./Def.-Time O/C Elements (N, 1–4) 1
E50G Residual Ground Inst./Def.-Time O/C Elements
(N, 1–4)
N
E50Q Negative-Sequence Inst./Def.-Time O/C Elements
(N, 1–4)
N
E51S Selectable Inverse-Time O/C Elements (N, 1–3) 1
E32 Directional Control (Y, AUTO, AUTO2) AUTO2
ECOMM Communications-Assisted Tripping (N, DCB, POTT,
POTT2, POTT3, DCUB2, DCUB2)
POTT2
EBFL1 Breaker 1 Failure Logic (N, 1, 2, Y1, Y2) N
EBFL2 Breaker 2 Failure Logic (N, 1, 2, Y1, Y2) N
E25BK1 Synchronism Check for Breaker 1 (Y, N, Y1, Y2) N
E25BK2 Synchronism Check for Breaker 2 (Y, N, Y1, Y2) N
E79 Reclosing (Y, Y1, N) N
EMANCL Manual Closing (Y, N) N
ELOP Loss-of-Potential (Y, Y1, N) Y1
EDEM Demand Metering (N, THM, ROL) N
EADVS Advanced Settings (Y, N) Y
VMEMC Memory Voltage Control (SEL
OGIC equation) 0
EFID Enable FID Logic (Y, N) Y
Z50P1 Zone 1 Phase Fault Detector (0.50–170.00 A,
secondary)
0.5
Z50G1 Zone 1 Ground Fault Detector (0.50–100.00 A,
secondary)
0.5
Mho Phase-Distance Element Reach (Group)
Z1MP Zone 1 Reach (OFF, 0.05–64  secondary) 3.18
Z2MP Zone 2 Reach (OFF, 0.05–64  secondary) 4.78
Z3MP Zone 3 Reach (OFF, 0.05–64  secondary) 4.78
Mho Phase-Distance Element Time Delay (Group)
Z1PD Zone 1 Time Delay (OFF, 0.000–16000 cycles) OFF
Z2PD Zone 2 Time Delay (OFF, 0.000–16000 cycles) OFF
Z3PD Zone 3 Time Delay (OFF, 0.000–16000 cycles) OFF
Table 6.13 Settings for 500 kV Parallel TX Example (Sheet 3 of 7)
Setting Prompt Entry