Schweitzer Engineering Laboratories SEL-421-4 - Page 452

6.116
SEL-421 Relay Instruction Manual Date Code 20171021
Protection Applications Examples
EHV Parallel 230 kV Underground Cables Example
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 Res. Ground Inst./Def. Time O/C Elements
(N, 1–4)
N
E50Q Negative-Sequence Inst./Def. Time O/C Elements
(N, 1–4)
3
E51S Selectable Inverse Time O/C Element (N, 1–3) 1
E32 Directional Control (Y, AUTO, AUTO2) AUTO2
ECOMM Comm.-Assisted Tripping (N, DCB, POTT,
POTT2, POTT3, DCUB1, DCUB2)
POTT
EBFL1 Breaker 1 Failure Logic (N, 1, 2, Y1, Y2) N
E25BK1 Synchronism Check for Breaker 1 (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
Mho Phase-Distance Element Reach (Group)
Z1MP Zone 1 Reach (OFF, 0.05–64  secondary) 0.38
Z2MP Zone 2 Reach (OFF, 0.05–64  secondary) 0.58
Z3MP Zone 3 Reach (OFF, 0.05–64  secondary) 0.58
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
Quadrilateral Ground-Distance Element Reach (Group)
XG1 Zone 1 Reactance (OFF, 0.05–64  secondary) 0.38
RG1 Zone 1 Resistance (0.05–50  secondary) 1.29
XG2 Zone 2 Reactance (OFF, 0.05–64  secondary) 0.58
RG2 Zone 2 Resistance (0.05–50  secondary) 1.97
XG3 Zone 3 Reactance (OFF, 0.05–64  secondary) 0.58
RG3 Zone 3 Resistance (0.05–50  secondary) 2.46
XGPOL Quad Ground Polarizing Quantity (I2, IG) I2
TANGG Nonhomogeneous Correction Angle
(–40.0 to +40 degrees)
–2.2
Zero-Sequence Current Compensation Factor (Group)
k0M1 Zone 1 ZSC Factor Magnitude (AUTO, 0.000–10) 0.385
k0A1 Zone 1 ZSC Factor Angle (–180.0 to +180 degrees) –46.7
Table 6.31 Settings for 230 kV Parallel Cables Example (Sheet 2 of 5)
Setting Prompt Entry