Sel 411L - Page 449

P.3.341
Date Code 20151029 Protection Manual SEL-411L Relay
Protection Functions
Protection Application Examples
We would have the following at Relay R:
51P01 := 1.0 O/C Pickup (0.25–16 A, sec)
We would have the following at Relay T:
51P01 := 1.4 O/C Pickup (0.25–16 A, sec)
We would have the following at all relays:
51C01 := U3 Inv-Time O/C Curve (U1–U5, C1–C5)
51TD01 := 1.9 Inv-Time O/C Time Dial (0.50–15)
51RS01 := Y Inv-Time O/C EM Reset (Y, N)
We would have the following at relays S and R:
51TC01 := 32GF Torque Control (SEL
OGIC control equation)
ORDER := QV Ground Dir. Element Priority (combine Q, V, I)
E32IV := 1 Zero-Seq. Voltage and Current Enable (SEL
OGIC control
equation)
We would have the following at Relay T:
51TC01:=1 Torque Control (SEL
OGIC control equation)
Trip Logic
Set TR to Current Differential, Zone 1 instantaneous distance protection and
Zone 2 time-delayed distance protection, and SOTF.
We would have the following at relays S and R:
TR := 87OP OR 50P1 OR 51T01 (SEL
OGIC control equation)
We would have the following at Relay T:
TR := 87OP OR 50P1 OR 50G1 OR 51T01 (SEL
OGIC control
equation)
Use the default setting to assert ULTR when you push the front-panel target
reset.
ULTR := TRGTR Unlatch Trip (SEL
OGIC control equation)
Select the third option for TULO, because breaker auxiliary contacts are
available.
TULO := 3 Trip Unlatch Option (1, 2, 3, 4)
Set E87DTT to 1 to allow the relay at Terminal R (master) to receive trip
commands from terminals S and T.
We would have the following at Relay R:
E87DTT := 1 Enable 87 Direct Transfer Trip receive (SEL
OGIC control
equation)
We would have the following at relays S and T:
E87DTT := 1 Enable 87 Direct Transfer Trip receive (SEL
OGIC control
equation)