Sel SEL-421 - Zone;Level Direction; Directional Control Element; Pole Open Detection

R.10.26
SEL-421 Relay Reference Manual Date Code 20111215
Settings
Group Settings
Make Table 10.55 settings if any of the Group settings E21P, E21G, E21XG,
E50P, E50G or E50Q := 3, 4, or 5.
Tabl e 1 0 .55 Zo n e/L e ve l Di re c tio n
Label Prompt Default Value
DIR3 Zone/Level 3 Directional Control (F, R) R
DIR4 Zone/Level 4 Directional Control (F, R) F
DIR5 Zone/Level 5 Directional Control (F, R) F
Table 10.56 Directional Control Element
Default Value
Label Prompt 5 A 1 A
ORDER Ground Directional Element Priority
(combine Q, V, I)
QV QV
50FP
a
a
Make setting only when Group setting E32 := Y. Setting automatically calculated when
E32 := AUTO.
Forward Directional Overcurrent Pickup
(0.25–5 A secondary) 5 A
(0.05–1 A secondary) 1 A
0.60 0.12
50RP
a
Reverse Directional Overcurrent Pickup
(0.25–5 A secondary) 5 A
(0.05–1 A secondary) 1 A
0.40 0.08
Z2F
a
Forward Directional Z2 Threshold
(–64.00 to +64.00  secondary) 5 A
(–320.00 to +320.00  secondary) 1 A
3.90 19.50
Z2R
a
Reverse Directional Z2 Threshold
(–64.00 to +64.00  secondary) 5 A
(–320.00 to +320.00  secondary) 1 A
4.00 22.00
a2
a
Positive-Sequence Restraint Factor, I2/I1 (0.02–0.50) 0.10 0.10
k2
a
Zero-Sequence Restraint Factor, I2/I0 (0.10–1.20) 0.20 0.20
Z0F
a
Forward Directional Z0 Threshold
(–64.00 to +64.00  secondary) 5 A
(–320.00 to +320.00  secondary) 1 A
12.40 62.00
Z0R
a
Reverse Directional Z0 Threshold
(–64.00 to +64.00  secondary) 5 A
(–320.00 to +320.00  secondary) 1 A
12.50 62.50
a0
a
Positive-Sequence Restraint Factor, I0/I1 (0.02–0.5) 0.10 0.10
E32IV Zero-Sequence Voltage and Current Enable
(SEL
OGIC Equation)
11
Table 10.57 Pole Open Detection
Label Prompt Default Value
EPO Pole Open Detection (52, V) 52
27PO Undervoltage Pole Open Threshold (1–200 V) 40
SPOD Single Pole Open Dropout Delay (0.000–60 cycles) 0.500
3POD Three Pole Open Dropout Delay (0.000–60 cycles) 0.500