8.34
SEL-421 Relay Instruction Manual Date Code 20171021
Settings
Protection Freeform SEL
OGIC Control Equations
Protection Freeform SELOGIC Control Equations
Protection freeform SELOGIC control equations are in classes 1 through 6 corre-
sponding to settings Groups 1 through Group 6 (see Multiple Setting Groups on
page 12.4 in the SEL-400 Series Relays Instruction Manual).
Table 8.81 only shows the factory-default protection freeform SEL
OGIC control
equations. Up to 250 lines of freeform equations may be entered in each of six
settings groups, although the actual maximum capacity may be less. See
SEL
OGIC Control Equation Capacity on page 13.5 in the SEL-400 Series Relays
Instruction Manual for more information.
Automation Freeform SELOGIC Control Equations
See Automation Freeform SELOGIC Control Equations on page 12.21 in the
SEL-400 Series Relays Instruction Manual for a description of automation
SEL
OGIC control equations. The SEL-421-4 supports a single block of 100 lines;
the SEL-421-5 supports 10 blocks of 100 lines.
Notes Settings
Use the Notes settings like a text pad to leave notes about the relay in Notes area
of the relay. See Notes Settings on page 12.24 in the SEL-400 Series Relays
Instruction Manual for additional information on Notes settings.
E3PT2 Breaker 2 Three-Pole Trip (SELOGIC Equation) 1
ER Event Report Trigger Equation (SEL
OGIC Equation) R_TRIG Z2P OR R_TRIG
Z2G OR R_TRIG 51S1
OR R_TRIG Z3P OR
R_TRIG Z3G
Table 8.80 Trip Logic (Sheet 2 of 2)
Setting Prompt Default Value Increment
Ta b l e 8 .8 1 Pr o tectio n Fre efo r m S E LOGIC Control Equations
Setting Default Value
PLT02S PB2_PUL AND NOT PLT02 # COMM SCHEME ENABLED
PLT02R PB2_PUL AND PLT02
PLT04S PB4_PUL AND NOT PLT04 # RELAY TEST MODE
PLT04R PB4_PUL AND PLT04
PLT05S PB5_PUL AND NOT PLT05 # MANUAL CLOSE ENABLED
PLT05R PB5_PUL AND PLT05
PLT06S PB6_PUL AND NOT PLT06 # RECLOSE ENABLED
PLT06R PB6_PUL AND PLT06
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