Sel 421 - Page 29

xxvii
Date Code 20090715 SEL-421 Relay
List of Figures
Figure 6.3 Enhancing Multidrop Networks With the SEL Communications Processors.................... A.6.4
Figure 6.4 Example SEL Relay and SEL Communications Processors Configuration....................... A.6.5
Figure 7.1 DNP3 Multidrop Network Topology ................................................................................. A.7.3
Figure 7.2 DNP3 Star Network Topology ........................................................................................... A.7.3
Figure 7.3 DNP3 Network with Communications Processor.............................................................. A.7.3
Figure 7.4 Example Direct Networking Topology .............................................................................. A.7.7
Figure 7.5 Telnet Connection Dialog Box........................................................................................... A.7.9
Figure 7.6 Example FTP Session....................................................................................................... A.7.10
Figure 7.7 Partial Contents of SET_P5.TXT..................................................................................... A.7.11
Figure 7.8 Example Telnet Session ................................................................................................... A.7.12
Reference Manual
Figure 1.1 Current and Voltage Source Connections for the SEL-421 Relay ......................................R.1.2
Figure 1.2 Main and Alternate Line Current Source Assignments ......................................................R.1.3
Figure 1.3 Combined Currents for Line Current Source Assignment..................................................R.1.3
Figure 1.4 Breaker Current Source Assignments .................................................................................R.1.3
Figure 1.5 ESS := 1, Single Circuit Breaker Configuration .................................................................R.1.8
Figure 1.6 ESS := 2, Single Circuit Breaker Configuration .................................................................R.1.9
Figure 1.7 ESS := 3, Double Circuit Breaker Configuration..............................................................R.1.10
Figure 1.8 ESS := 4, Double Circuit Breaker Configuration..............................................................R.1.11
Figure 1.9 Tapped EHV Overhead Transmission Line.......................................................................R.1.12
Figure 1.10 ESS := Y, Tapped Line ......................................................................................................R.1.13
Figure 1.11 ESS := Y, Single Circuit Breaker With Current Polarizing Source Tapped Power
Transformer ...................................................................................................................R.1.14
Figure 1.12 Frequency Estimation for Protection Functions................................................................R.1.16
Figure 1.13 Sample TEC Command Response ....................................................................................R.1.17
Figure 1.14 Sample TEC n Command Response .................................................................................R.1.18
Figure 1.15 Pole Open Logic Diagram.................................................................................................R.1.22
Figure 1.16 LOP Logic Process Overview ...........................................................................................R.1.24
Figure 1.17 LOP Logic.........................................................................................................................R.1.26
Figure 1.18 32Q and 32QG Enable Logic Diagram.............................................................................R.1.31
Figure 1.19 32V and 32I Enable Logic Diagram .................................................................................R.1.31
Figure 1.20 Best Choice Ground Directional Logic.............................................................................R.1.33
Figure 1.21 Negative-Sequence Voltage-Polarized Directional Element Logic...................................R.1.34
Figure 1.22 Zero-Sequence Voltage-Polarized Directional Element Logic .........................................R.1.34
Figure 1.23 Zero-Sequence Current-Polarized Directional Element Logic .........................................R.1.35
Figure 1.24 Ground Directional Element Output Logic Diagram........................................................R.1.35
Figure 1.25 32P, Phase Directional Element Logic Diagram ...............................................................R.1.39
Figure 1.26 32Q, Negative-Sequence Directional Element Logic Diagram ........................................R.1.39
Figure 1.27 CVT Transient Detection Logic ........................................................................................R.1.41
Figure 1.28 Load-Encroachment Logic Diagram.................................................................................R.1.42
Figure 1.29 Load-Encroachment Characteristics .................................................................................R.1.42
Figure 1.30 OOS Characteristics ..........................................................................................................R.1.44
Figure 1.31 OOS Positive-Sequence Measurements ............................................................................R.1.47
Figure 1.32 OOS Override Logic .........................................................................................................R.1.47
Figure 1.33 OOS Logic Diagram..........................................................................................................R.1.48
Figure 1.34 Open-Pole OSB Unblock Logic........................................................................................R.1.49
Figure 1.35 Zone 1 Mho Ground Distance Element Logic Diagram ...................................................R.1.51
Figure 1.36 Zone 2 Mho Ground Distance Element Logic Diagram ...................................................R.1.52
Figure 1.37 Zones 3, 4, and 5 Mho Ground Distance Element Logic Diagram...................................R.1.53
Figure 1.38 Zone 1 Quadrilateral Ground Distance Element Logic Diagram......................................R.1.55
Figure 1.39 Zone 2 Quadrilateral Distance Element Logic Diagram...................................................R.1.56
Figure 1.40 Zones 3, 4, and 5 Quadrilateral Ground Distance Element Logic ....................................R.1.57
Figure 1.41 Zone 1 Mho Phase Distance Element Logic Diagram ......................................................R.1.59
Figure 1.42 Zone 2 Mho Phase Distance Element Logic Diagram ......................................................R.1.60
Figure 1.43 Zones 3, 4, and 5 Mho Phase Distance Element Logic Diagram......................................R.1.61
Figure 1.44 Zone Timers ......................................................................................................................R.1.63
Courtesy of NationalSwitchgear.com