Sel SEL-421 - Voltage Elements; Demand Metering

R.10.33
Date Code 20111215 Reference Manual SEL-421 Relay
Settings
Group Settings
Make Table 10.68 settings if Group settings E79 := Y or Y1 or
EMANCL := Y.
Make Table 10.69 settings if Group setting EDEM := THM or ROL.
Table 10.68 Voltage Elements
Label Prompt Default Value
EVCK Reclosing Voltage Check (Y, N) N
27LP Dead Line Voltage (1.0–200 V secondary) 14.0
59LP Live Line Voltage (1.0–200 V secondary) 53.0
27BK1P Breaker 1 Dead Busbar Voltage
(1.0–200 V secondary)
14.0
59BK1P Breaker 1 Live Busbar Voltage (1.0–200 V secondary) 53.0
27BK2P Breaker 2 Dead Busbar Voltage
(1.0–200 V secondary)
14.0
59BK2P Breaker 2 Live Busbar Voltage (1.0–200 V secondary) 53.0
Tabl e 1 0 .69 De m and M ete rin g
Default Value
Label Prompt 5 A 1 A
DMTC Demand Metering Time Constant
(5, 10, . . . , 300 minutes)
15 15
PDEMP Phase Current Pickup
(OFF, 0.50–16 A secondary) 5 A
(OFF, 0.10–3.2 A secondary) 1 A
OFF OFF
GDEMP Residual Ground Current Pickup
(OFF, 0.50–16 A secondary) 5 A
(OFF, 0.10–3.2 A secondary) 1 A
OFF OFF
QDEMP Negative-Sequence Current Pickup
(OFF, 0.50–16 A secondary) 5 A
(OFF, 0.10–3.2 A secondary) 1 A
OFF OFF
Table 10.70 Trip Logic (Sheet 1 of 2)
Label Prompt Default Value
TR Trip (SELOGIC Equation) M1P OR Z1G OR M2PT
OR Z2GT
TRCOMM Communications-Assisted Trip
(SEL
OGIC Equation)
(M2P OR Z2G) AND
PLT02
TRSOTF Switch-Onto-Fault Trip
(SEL
OGIC Equation)
50P1 OR M2P OR Z2G
DTA Direct Transfer Trip A-Phase
(SEL
OGIC Equation)
NA
DTB Direct Transfer Trip B-Phase
(SEL
OGIC Equation)
NA
DTC Direct Transfer Trip C-Phase
(SEL
OGIC Equation)
NA
BK1MTR Breaker 1 Manual Trip—BK1
(SEL
OGIC Equation)
8 pushbuttons OC1 OR PB8_PUL