Schweitzer Engineering Laboratories SEL-421-4, Instruction Manual

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8.15
Date Code 20171021 Instruction Manual SEL-421 Relay
Settings
Group Settings
The number of pickup settings in Table 8.38 is dependent on Group setting
E21XP := 1–5. When E21XP := N, no settings are made for Table 8.38 .
Table 8.37 Mho Phase-Distance Element Reach
Setting Prompt
Default Value
Increment
5 A 1 A
ZIMP Zone 1 Reach
(OFF, 0.05–64

secondary) 5 A
(OFF, 0.25–320

secondary) 1 A
6.24 31.2 0.01
Z2MP Zone 2 Reach
(OFF, 0.05–64

secondary) 5 A
(OFF, 0.25–320

secondary) 1 A
9.36 46.8 0.01
Z3MP Zone 3 Reach
(OFF, 0.05–64

secondary) 5 A
(OFF, 0.25–320

secondary) 1 A
1.87 9.35 0.01
Z4MP Zone 4 Reach
(OFF, 0.05–64

secondary) 5 A
(OFF, 0.25–320

secondary) 1 A
OFF OFF 0.01
Z5MP Zone 5 Reach
(OFF, 0.05–64

secondary) 5 A
(OFF, 0.25–320

secondary) 1 A
OFF OFF 0.01
Table 8.38 Quadrilateral Phase-Distance Element Reach (Sheet 1 of 2)
Setting Prompt
Default Value
Increment
5 A 1 A
XP1 Zone 1 Reactance (ohms, secondary)
(OFF, 0.05–64

secondary) 5 A
(OFF, 0.25–320

secondary) 1 A
OFF OFF 0.01
RP1 Zone 1 Resistance (ohms, secondary)
(OFF, 0.05–50

secondary) 5 A
(OFF, 0.25–250

secondary) 1 A
12.48 62.40 0.01
XP2 Zone 2 Reactance (ohms, secondary)
(OFF, 0.05–64

secondary) 5 A
(OFF, 0.25–320

secondary) 1 A
OFF OFF 0.01
RP2 Zone 2 Resistance (ohms, secondary)
(OFF, 0.05–50

secondary) 5 A
(OFF, 0.25–250

secondary) 1 A
18.72 93.60 0.01
XP3 Zone 3 Reactance (ohms, secondary)
(OFF, 0.05–64

secondary) 5 A
(OFF, 0.25–320

secondary) 1 A
OFF OFF 0.01
RP3 Zone 3 Resistance (ohms, secondary)
(OFF, 0.05–50

secondary) 5 A
(OFF, 0.25–250

secondary) 1 A
3.64 18.20 0.01
XP4 Zone 4 Reactance (ohms, secondary)
(OFF, 0.05–64

secondary) 5 A
(OFF, 0.25–320

secondary) 1 A
OFF OFF 0.01
RP4 Zone 4 Resistance (ohms, secondary)
(OFF, 0.05–150

secondary) 5 A
(OFF, 0.25–750

secondary) 1 A
31.20 156.00 0.01