Schweitzer Engineering Laboratories SEL-421-4 - Page 560

8.24
SEL-421 Relay Instruction Manual Date Code 20171021
Settings
Group Settings
Make Table 8.59 settings if Group setting E51S := 2 or 3.
Make Table 8.60 settings if Group setting E51S := 3.
51S1C 51S1 Inverse Time Overcurrent Curve
(U1–U5) US
(C1–C5) IEC
U3 U3
51S1TD 51S1 Inverse Time Overcurrent Time Dial
(0.50–15.00) US
(0.05–1.00) IEC
1.0 1.0
51S1RS 51S1 Inverse Time Overcurrent Electromagnetic Reset
(Y, N)
NN
51S1TC
b
51S1 Torque Control (SELOGIC Equation) 32GF 32GF
a
Parameter n = L for line, 1 for BK1, and 2 for BK2.
b
This setting cannot be set to NA or to logical 0.
Table 8.59 Selectable Operating Quantity Inverse Time Overcurrent Element 2
Setting Prompt
Default Value
5 A 1 A
51S2O 51S2 Operating Quantity (IAn, IBn, ICn, IMAXn, I1L, 3I2L,
3I0n)
a
a
Parameter n = L for line, 1 for BK1, 2 for BK2.
3I2L 3I2L
51S2P 51S2 Overcurrent Pickup
(0.25–16 A secondary) 5 A
(0.05–3.2 A secondary) 1 A
5.00 1.00
51S2C 51S2 Inverse Time Overcurrent Curve
(U1–U5) US
(C1–C5) IEC
U3 U3
51S2TD 51S2 Inverse Time Overcurrent Time Dial
(0.50–15.00)
(0.05–1.00) IEC
1.0 1.0
51S2RS 51S2 Inverse Time Overcurrent Electromagnetic Reset
(Y, N)
NN
51S2TC
b
b
This setting cannot be set to NA or to logical 0.
51S2 Torque Control (SELOGIC Equation) 32QF 32QF
Table 8.60 Selectable Operating Quantity Inverse Time Overcurrent Element 3
(Sheet 1 of 2)
Setting Prompt
Default Value
5 A 1 A
51S3O 51S3 Operating Quantity (IAn, IBn, ICn, IMAXn, I1L, 3I2L,
3I0n)
a
IMAXL IMAXL
51S3P 51S3 Overcurrent Pickup
(0.25–16 A secondary) 5 A
(0.05–3.2 A secondary) 1 A
5.00 1.00
Table 8.58 Selectable Operating Quantity Inverse Time Overcurrent Element 1
(Sheet 2 of 2)
Setting Prompt
Default Value
5 A 1 A