Schweitzer Engineering Laboratories SEL-421-4, Instruction Manual

Page: 561 / 1518

8.25
Date Code 20171021 Instruction Manual SEL-421 Relay
Settings
Group Settings
Make Table 8.61 settings if E81 is not N.
Make Table 8.62 settings if E27 is not set to N.
Make Table 8.63 settings if E27 is not set to N.
51S3C 51S3 Inverse Time Overcurrent Curve
(U1–U5) US
(C1–C5) IEC
U3 U3
51S3TD 51S3 Inverse Time Overcurrent Time Dial
(0.50–15.00) US
(0.05–1.00) IEC
1.0 1.0
51S3RS 51S3 Inverse Time Overcurrent Electromagnetic Reset
(Y, N) N N
51S3TC
b
51S3 Torque Control (SEL
OGIC
Equation) Z2P Z2P
a
Parameter
n
= L for line, 1 for BK1, 2 for BK2.
b
This setting cannot be set to NA or to logical 0.
Table 8.61 81 Elements
Setting Prompt Default Value
81UVSP 81 Element Under Voltage Supervision (20.00–200 V, sec) 85
81D n P
a
a
Where n is 1-E81.
Level n Pickup (40.01–69.99 Hz) 61
81D n D
a
Level n Time Delay (0.04–400 s) 2
Table 8.62 Under Voltage (27) Element
e
a
a
Where
e
is 1-E27.
Setting Prompt Default Value
27O e Under Voltage e Operating Quantity V1F1M
27P e P1 Under Voltage e Level 1 Pickup (2.00–300 V, sec) 20
27TC e Under Voltage e Torque Control (SEL
OGIC
Equation) 1
27P e D1 Under Voltage e Level 1 Delay (0.00–16000 cycles) 10
27P e P2 Under Voltage e Level 2 Pickup (2.00–300 V, sec) 15
Table 8.63 Over Voltage (59) Element
e
a
a
Where
e
is 1-E59.
Setting Prompt Default Value
59O e Over Voltage e Operating Quantity V1F1M
59P e P1 Over Voltage e Level 1 Pickup (2.00–300 V, sec) 76
59TC e Over Voltage e Torque Control (SEL
OGIC
Equation) 1
59P e D1 Over Voltage e Level 1 Delay (0.00–16000 cycles) 10
59P e P2 Over Voltage e Level 2 Pickup (2.00–300 V, sec) 80
Table 8.60 Selectable Operating Quantity Inverse Time Overcurrent Element 3
(Sheet 2 of 2)
Setting Prompt
Default Value
5 A 1 A