Sel 411L - Page 439

P.3.331
Date Code 20151029 Protection Manual SEL-411L Relay
Protection Functions
Protection Application Examples
TDUR1D := 9.000 SPT Min Trip Duration Time Delay
(2.000–8000 cycles)
TDUR3D := 9.000 3PT Min Trip Duration Time Delay
(2.000–8000 cycles)
Enable Single-Pole Tripping
Configure PLT01 and PB1 to allow front-panel control of single-pole tripping
PLT01S := PB1_PUL AND NOT PLT01 # SINGLE POLE TRIPPING
ENABLED
PLT01R := PB1_PUL AND PLT01
Trip three-pole when single-pole tripping is not enabled or for a trip during
open pole (TOP).
E3PT := NOT PLT01 OR TOP Three-Pole Trip Enable (SEL
OGIC
control equation)
E3PT1 := NOT PLT01 Breaker 1 3PT (SEL
OGIC control equation)
E3PT2 := NOT PLT01 Breaker 2 3PT (SEL
OGIC control equation)
Control Outputs
Use SELOGIC control equations to assign the control outputs for tripping. Use
the 200 Board control outputs for tripping. The first three control outputs trip
Circuit Breaker BK1A, and the next three trip Circuit Breaker BK1B.
OUT201 := TPA1 AND NOT PLT04
OUT202 := TPB1 AND NOT PLT04
OUT203 := TPC1 AND NOT PLT04
OUT204 := TPA2 AND NOT PLT04
OUT205 := TPB2 AND NOT PLT04
OUT206 := TPC2 AND NOT PLT04
OUT207 := 87TOUT
OUT208 := NOT (SALARM OR HALARM) OR PLT04
Three-Terminal 345
kV Line Differential
Example
Figure 3.220 shows a three-ended overhead 345 kV line with SEL-411L
protection at each terminal.