R.10.34
SEL-421 Relay Reference Manual Date Code 20111215
Settings
Protection Free-Form SELOGIC Control Equations
Protection Free-Form SELOGIC Control Equations
Protection free-form SELOGIC control equations are in classes 1 through 6
corresponding to settings Groups 1 through Group 6 (see Section 3: SEL
OGIC
Control Equation Programming).
Table 10.71 only shows the factory default protection free-form SEL
OGIC
control equations. Up to 250 lines of free-form 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 R.3.11 for more
information.
12 pushbuttons OC1 OR PB12PUL
12 pushbuttons and auxiliary TRIP/CLOSE
pushbuttons
OC1
BK2MTR Breaker 2 Manual Trip—BK2
(SEL
OGIC Equation)
NA
ULTR Unlatch Trip (SEL
OGIC Equation) TRGTR
ULMTR1 Unlatch Manual Trip—BK1
(SEL
OGIC Equation)
NOT (52AA1 AND
52AB1 AND 52AC1)
ULMTR2 Unlatch Manual Trip—BK2
(SEL
OGIC Equation)
1
TOPD Trip During Open Pole Time Delay
(2.000–8000 cycles)
2.000
TULO Trip Unlatch Option (1, 2, 3, 4) 3
Z2GTSP Zone 2 Ground Distance Time Delay for
Single-Pole Tripping (Y, N)
N
67QGSP Zone 2 Directional Negative-Sequence/
Residual Overcurrent Single-Pole Trip
(Y, N)
N
TDUR1D Single-Pole Trip Minimum Trip Duration
Time Delay (2.000–8000 cycles)
6.000
TDUR3D Three-Pole Trip Minimum Trip Duration
Time Delay (2.000–8000 cycles)
12.000
E3PT Three-Pole Trip Enable
(SEL
OGIC Equation)
1
E3PT1 Breaker 1 Three-Pole Trip
(SEL
OGIC Equation)
1
E3PT2 Breaker 2 Three-Pole Trip
(SEL
OGIC Equation)
1
ER Event Report Trigger Equation
(SEL
OGIC Equation)
R_TRIG M2P OR
R_TRIG Z2G OR
R_TRIG 51S1 OR
R_TRIG M3P OR
R_TRIG Z3G
Table 10.70 Trip Logic (Sheet 2 of 2)
Label Prompt Default Value
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