Sel 421 - Page 13

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Date Code 20090715 SEL-421 Relay
List of Tables
Table 1.71 Setting TULO Unlatch Trip Options...............................................................................R.1.107
Table 1.72 Trip Logic Settings..........................................................................................................R.1.108
Table 1.73 Trip Logic Relay Word Bits ............................................................................................R.1.109
Table 1.74 Circuit Breaker Failure Protection Logic Settings ..........................................................R.1.122
Table 1.75 Circuit Breaker Failure Relay Word Bits ........................................................................R.1.122
Table 2.1 Auto-Reclose Logical States for Circuit Breaker 1.............................................................R.2.4
Table 2.2 One-Circuit-Breaker Three-Pole Reclosing Initial Settings................................................R.2.8
Table 2.3 One-Circuit-Breaker Single-Pole Reclose Initial Settings ..................................................R.2.8
Table 2.4 One Circuit Breaker Modes of Operation ...........................................................................R.2.9
Table 2.5 Dynamic Leader/Follower Settings...................................................................................R.2.17
Table 2.6 Leader/Follower Selection ................................................................................................R.2.18
Table 2.7 Example One: Reset and 79CY3 States ............................................................................R.2.18
Table 2.8 Example One: Lockout State.............................................................................................R.2.19
Table 2.9 Example One: Reset State After Reclaim Time................................................................R.2.19
Table 2.10 Leader/Follower Selection ................................................................................................R.2.20
Table 2.11 Example Two: Initial Reset State ......................................................................................R.2.20
Table 2.12 Example Two: Final Reset State .......................................................................................R.2.20
Table 2.13 Leader/Follower Selection ................................................................................................R.2.21
Table 2.14 Example Three: Reset State ..............................................................................................R.2.21
Table 2.15 Example Three: Three-Pole Cycle State ...........................................................................R.2.21
Table 2.16 Example Three: Lockout State, BK1 ................................................................................R.2.22
Table 2.17 Leader/Follower Selection ................................................................................................R.2.22
Table 2.18 Two Circuit Breakers: Circuit Breaker BK1 Out of Service.............................................R.2.23
Table 2.19 Two-Circuit-Breaker Three-Pole Reclose Initial Settings.................................................R.2.24
Table 2.20 Two-Circuit-Breaker Single-Pole Reclose Initial Settings................................................R.2.24
Table 2.21 Circuit Breaker BK1 Modes of Operation ........................................................................R.2.25
Table 2.22 Circuit Breaker BK2 Modes of Operation ........................................................................R.2.25
Table 2.23 Trip Logic Enable Options................................................................................................R.2.26
Table 2.24 Auto-Reclose Logic Settings.............................................................................................R.2.46
Table 2.25 Auto-Reclose Logic Relay Word Bits...............................................................................R.2.48
Table 2.26 Synchronism-Check Relay Word Bits...............................................................................R.2.54
Table 3.1 Advanced SEL-421 SEL
OGIC Control Equation Features ..................................................R.3.1
Table 3.2 SEL-421 SEL
OGIC Control Equation Programming Summary ..........................................R.3.2
Table 3.3 Definitions for Active Setting Group Indication Relay Word Bits SG1 Through SG6 ......R.3.9
Table 3.4 Definitions for Active Setting Group Switching SEL
OGIC Control Equation
Settings SS1 Through SS6 .................................................................................................R.3.9
Table 3.5 Summary of SEL
OGIC Control Equation Elements ..........................................................R.3.12
Table 3.6 First Execution Bit Operation on Power-Up .....................................................................R.3.13
Table 3.7 First Execution Bit Operation on Automation Settings Change .......................................R.3.13
Table 3.8 First Execution Bit Operation on Protection Settings Change, Group Switch,
and Source Selection........................................................................................................R.3.13
Table 3.9 SEL
OGIC Control Equation Variable Quantities ...............................................................R.3.13
Table 3.10 SEL
OGIC Control Equation Math Variable Quantities ......................................................R.3.14
Table 3.11 Latch Bit Quantities ..........................................................................................................R.3.15
Table 3.12 Latch Bit Parameters .........................................................................................................R.3.15
Table 3.13 Conditioning Timer Quantities..........................................................................................R.3.17
Table 3.14 Conditioning Timer Parameters ........................................................................................R.3.17
Table 3.15 Sequencing Timer Quantities ............................................................................................R.3.21
Table 3.16 Sequencing Timer Parameters...........................................................................................R.3.21
Table 3.17 Counter Quantities.............................................................................................................R.3.23
Table 3.18 Counter Parameters ...........................................................................................................R.3.23
Table 3.19 Operator Precedence from Highest to Lowest ..................................................................R.3.25
Table 3.20 Boolean Operator Summary..............................................................................................R.3.26
Table 3.21 Parentheses Operation in Boolean Equation .....................................................................R.3.26
Table 3.22 NOT Operator Truth Table ................................................................................................R.3.27
Table 3.23 AND Operator Truth Table ...............................................................................................R.3.27
Table 3.24 OR Operator Truth Table...................................................................................................R.3.27
Table 3.25 Comparison Operations.....................................................................................................R.3.29
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