Schweitzer Engineering Laboratories SEL-351A - Figure 3.8 Levels 1 through 4 Neutral-Ground Instantaneous Overcurrent Elements (with Directional Control and Definite-Time Elements in SEL-351 A); Figure 3.9 Levels 5 through 6 Neutral-Ground Instantaneous Overcurrent Elements

3.10
SEL-351A Relay Instruction Manual Date Code 20080213
Overcurrent, Voltage, Synchronism Check, and Frequency Elements
Instantaneous/Definite-Time Overcurrent Elements
q From Figure 4.18
w Not present in SEL-351A-1.
Figure 3.8 Levels 1 Through 4 Neutral-Ground Instantaneous Overcurrent
Elements (With Directional Control and Definite-Time Elements in SEL-351A)
Figure 3.9 Levels 5 Through 6 Neutral-Ground Instantaneous Overcurrent
Elements
67N1
50N1
67N1T
Relay
Word
Bits
67N1TC
SEL
OGIC
Setting
Enabled
Levels
67N1D
0
Directional Control
(asserted to logical 1
continuously if E32 = N)
SEL
OGIC
Torque Control
q
(Level 1)
Level 1
(Setting
E5ON
≥
1)
67N3
50N3
67N3T
67N3TC
SELOGIC
Setting
67N3D
0
Directional Control
(asserted to logical 1
continuously if E32 = N)
SEL
OGIC
Torque Control
Level 3
(Setting
E5ON ≥ 3)
67N4
50N4
67N4T
67N4TC
SELOGIC
Setting
67N4D
0
Directional Control
(asserted to logical 1
continuously if E32 = N)
SEL
OGIC
Torque Control
Level 4
(Setting
E5ON ≥ 4)
50N2
67N2
67N2T
67N2D
0
Directional Control
(asserted to logical 1
continuously if E32 = N)
SELOGIC
Torque Control
Level 2
(Setting
E5ON ≥ 2)
67N2TC
SELOGIC
Setting
50N1P
I
N
Setting
q
(Level 3)
50N3P
I
N
Setting
q
(Level 4)
50N4P
I
N
Setting
q
(Level 2)
50N2P
I
N
Setting
w
w
w
w
w
w
w
w
w
w
w
w
5ON5
5ON6
Relay
Word
Bits
50N5P
50N6P
I
N
Settings
Enabled
Levels
Level 5
(Setting
E5ON ≥ 5)
Level 6
(Setting
E5ON = 6)
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