SEL-411L Data Sheet Schweitzer Engineering Laboratories, Inc.
38
Protection and Control Processing
8 times per power system cycle
Synchrophasors
Maximum data rate in messages per second
IEEE C37.118 Protocol: 60 (nominal 60 Hz system)
50 (nominal 50 Hz system)
SEL Fast Message
Protocol:
20 (nominal 60 Hz system)
10 (nominal 50 Hz system)
Control Points
64 remote bits
64 local control bits
32 latch bits in protection logic
32 latch bits in automation logic
Relay Element Pickup Ranges and Accuracies
Line Current Differential (87L) Elements
87L Enable Levels
Unrestraint Differential
Element Setting Range: OFF, 3.0 to 15 per unit, 0.1 pu steps
Phase Setting Range
(Normal): OFF, 0.10 to 2 per unit, 0.01 pu steps
Phase Setting Range
(Secure): OFF, 0.10 to 2 per unit, 0.01 pu steps
Negative-Sequence
Setting Range (Normal): OFF, 0.10 to 2.00 per unit, 0.01 pu steps
Setting Range (Secure): OFF, 0.10 to 2.00 per unit, 0.01 pu steps
Zero-Sequence
Setting Range (Normal): OFF, 0.10 to 2.00 per unit, 0.01 pu steps
Setting Range (Secure): OFF, 0.10 to 2.00 per unit, 0.01 pu steps
Accuracy: ±3% ±0.01 I
NOM
Restraint Characteristics
Outer Radius (Phase, Negative-Sequence, Zero-Sequence)
Radius Range (Normal): 1.2 to 8 in steps of 0.01 (unitless)
Radius Range (Secure): 1.2 to 8 in steps of 0.01 (unitless)
Angle Range (Normal): 90–270° in steps of 1°
Angle Range (Secure): 90–270° in steps of 1°
Accuracy: ±5% of radius setting
±3° of angle setting
Line-Charging Current Compensation
Positive-Sequence Line
Susceptance Setting Range: 0.00 to 250 mS, 0.01 mS steps
Zero-Sequence Line
Susceptance Setting Range: 0.00 to 100 mS, 0.01 mS steps
In-Line Transformer
MVA Setting Range: 1 to 5,000, 1 MVA steps
Vector Group Compensation: 360°, 30° steps
Line-to-Line Setting Range: 1.00 to 1,000 kV, 0.01 kV steps
Harmonic Restraint: 2nd, 4th Setting Range: OFF, 5 to 100%,
1% steps
Harmonic Blocking: 2nd, 4th and 5th Setting Range: OFF,
5 to 100%, 1% steps
Mho Phase-Distance Elements
Zones 1—5 Impedance Reach
Setting Range
5 A Model: OFF, 0.05 to 64 secondary,
0.01 steps
1 A Model: OFF, 0.25 to 320 secondary,
0.01 steps
Sensitivity
5 A Model: 0.5 A
P-P
secondary
1 A Model: 0.1 A
P-P
secondary
(Minimum sensitivity is controlled by the
pickup of the supervising phase-to-phase
overcurrent elements for each zone.)
Accuracy (Steady State): 3% of setting at line angle for SIR
(source-to-line impedance ratio) < 30
± 5% of setting at line angle for 30 SIR 60
Zone 1 Transient
Overreach: < 5% of setting plus steady-state accuracy
High-Speed
Maximum Operating Time: 0.8 cycle at 100% of reach and SIR = 1
Standard
Maximum Operating Time: 1.5 cycle at 100% of reach and SIR = 1
Quadrilateral Phase-Distance Elements
Zones 1—5 Impedance Reach
Quadrilateral Reactance Reach
5 A Model: OFF, 0.05 to 64 secondary, 0.01 steps
1 A Model: OFF, 0.25 to 320 secondary, 0.01 steps
Quadrilateral Resistance Reach
Zones 1, 2, and 3
5 A Model: OFF, 0.05 to 50 secondary, 0.01 steps
Zones 1, 2, and 3
1 A Model: OFF, 0.25 to 250 secondary, 0.01 steps
Zones 4 and 5
5 A Model: OFF, 0.05 to 150 secondary, 0.01 steps
Zones 4 and 5
1 A Model: OFF, 0.25 to 750 secondary, 0.01 steps
Sensitivity
5 A Model: 0.5 A secondary
1 A Model: 0.1 A secondary
Accuracy (Steady State): ± 3% of setting at line angle for SIR < 30
± 5% of setting at line angle for 30 SIR 60
Transient Overreach: < 5% of setting plus steady-state accuracy
High-Speed
Maximum Operating Time: 1.0 cycle at 70% of reach and SIR = 1
Standard
Maximum Operating Time: 1.5 cycle at 70% of reach and SIR = 1
Mho Ground-Distance Elements
Zones 1—5 Impedance Reach
Mho Element Reach
5 A Model: OFF, 0.05 to 64 secondary, 0.01 steps
1 A Model: OFF, 0.25 to 320 secondary, 0.01 steps
Sensitivity
5 A Model: 0.5 A secondary
1 A Model: 0.1 A secondary
(Minimum sensitivity is controlled by the
pickup of the supervising phase and
residual overcurrent elements for each
zone.)
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