Date Code 990430 Overcurrent, Voltage, Synchronism Check, and Frequency Elements iii
SEL-351P Manual Técnico
TABLES
Table 3.1: Available Phase Time-Overcurrent Elements .......................................................................3-16
Table 3.2: Phase Time-Overcurrent Elements Settings..........................................................................
3-17
Table 3.3: Phase Time-Overcurrent Element (maximum phase) Logic Outputs....................................
3-19
Table 3.4: Neutral Ground Time-Overcurrent Elements Settings ..........................................................
3-24
Table 3.5: Residual Ground Time-Overcurrent Elements Settings ........................................................
3-26
Table 3.6: Negative-Sequence Time-Overcurrent Elements Settings ....................................................
3-28
Table 3.7: Voltage Values Used by Voltage Elements...........................................................................
3-29
Table 3.8: Voltage Elements Settings and Settings Ranges ...................................................................
3-30
Table 3.9: Synchronism Check Elements Settings and Settings Ranges................................................
3-36
Table 3.10: Frequency Elements Settings and Settings Ranges.............................................................
3-48
FIGURES
Figure 3.1: Levels 1 through 4 Phase Instantaneous Overcurrent Elements .............................................3-2
Figure 3.2: Levels 5 through 6 Phase Instantaneous Overcurrent Elements .............................................
3-3
Figure 3.3: Levels 1 through 4 Phase Instantaneous/Definite-Time Overcurrent Elements (with
Directional Control Option)...........................................................................................
3-4
Figure 3.4: Combined Single-Phase Instantaneous Overcurrent Elements ...............................................
3-6
Figure 3.5: SEL-351P Recloser Control Nondirectional Instantaneous Overcurrent Element
Pickup Time Curve.........................................................................................................
3-7
Figure 3.6: SEL-351P Recloser Control Nondirectional Instantaneous Overcurrent Element Reset
Time Curve.....................................................................................................................
3-7
Figure 3.7: Levels 1 through 4 Phase-to-Phase Instantaneous Overcurrent Elements ..............................
3-9
Figure 3.8: Levels 1 through 4 Neutral Ground Instantaneous/Definite-Time Overcurrent
Elements (with Directional Control Option)................................................................
3-10
Figure 3.9: Levels 5 through 6 Neutral Ground Instantaneous Overcurrent Elements ...........................
3-11
Figure 3.10: Levels 1 through 4 Residual Ground Instantaneous/Definite-Time Overcurrent
Elements (with Directional Control Option)................................................................
3-12
Figure 3.11: Levels 5 through 6 Residual Ground Instantaneous Overcurrent Elements .......................
3-13
Figure 3.12: Levels 1 through 4 Negative-Sequence Instantaneous/Definite-Time Overcurrent
Elements (with Directional Control Option)................................................................
3-15
Figure 3.13: Levels 5 through 6 Negative-Sequence Instantaneous Overcurrent Elements....................
3-16
Figure 3.14: Phase Time-Overcurrent Element 51P1T (with Directional Control Option) ....................
3-18
Figure 3.15: Phase Time-Overcurrent Element 51P2T (with Directional Control Option) ....................
3-18
Figure 3.16: Neutral Ground Time-Overcurrent Element 51N1T (with Directional Control
Option) .........................................................................................................................
3-22
Figure 3.17: Neutral Ground Time-Overcurrent Element 51N2T (with Directional Control
Option) .........................................................................................................................
3-23
Figure 3.18: Residual Ground Time-Overcurrent Element 51G1T (with Directional Control
Option) .........................................................................................................................
3-25
Figure 3.19: Residual Ground Time-Overcurrent Element 51G2T (with Directional Control
Option) .........................................................................................................................
3-25
Figure 3.20: Negative-Sequence Time-Overcurrent Element 51QT (with Directional Control
Option) .........................................................................................................................
3-27
Figure 3.21: Single-Phase and Three-Phase Voltage Elements...............................................................
3-32
Figure 3.22: Phase-to-Phase and Sequence Voltage Elements................................................................
3-33
Figure 3.23: Channel VS Voltage Elements............................................................................................
3-34
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