Sel SEL-421 - Page 36

xxxviii List of Examples
SEL-421/SEL-421-1 Relay Date Code 20020501
Reference Manual
Section 1: Protection Functions
Section 2: Auto-Reclose and Synchronism Check
Example 2.1 Conditional Three-Pole Tripping for Circuit Breaker BK2.............................................. R.2.25
Example 2.2 Setting Alternative Synchronism-Check Source 2 ........................................................... R.2.56
Section 3: SELOGIC
®
CONTROL EQUATION PROGRAMMING
Example 3.1 Fixed SELOGIC Control Equations..................................................................................... R.3.5
Example 3.2 Free-Form SEL
OGIC Control Equations............................................................................. R.3.6
Example 3.3 Boolean and Math SEL
OGIC Control Equations................................................................. R.3.7
Example 3.4 SEL
OGIC Control Equation Variables............................................................................... R.3.13
Example 3.5 SEL
OGIC Control Equation Math Variables ..................................................................... R.3.13
Example 3.6 Protection Latch Bits ........................................................................................................ R.3.15
Example 3.7 Conditioning Timer Programming and Operation............................................................ R.3.19
Example 3.8 Automation Sequencing Timer Programming.................................................................. R.3.21
Example 3.9 Counter Programming ...................................................................................................... R.3.22
Example 3.10 R_TRIG Operation ........................................................................................................... R.3.27
Example 3.11 F_TRIG Operation............................................................................................................ R.3.28
Example 3.12 Using Parentheses in Math Equations .............................................................................. R.3.29
Example 3.13 Using Arithmetic Operations............................................................................................ R.3.30
Example 3.14 Using the SQRT Operator................................................................................................. R.3.31
Example 3.15 Using the LN, EXP, and LOG Operators.......................................................................... R.3.31
Example 3.16 Using the SIN and COS Operators ................................................................................... R.3.32
Example 3.17 Using the ASIN and ACOS Operators ............................................................................. R.3.32
Example 3.18 Using the ABS Operator................................................................................................... R.3.32
Example 3.19 Using the CEIL Operator.................................................................................................. R.3.33
Example 3.20 Using the FLOOR Operator ............................................................................................. R.3.33
Example 3.21 Using the Negation Operator............................................................................................ R.3.33
Example 3.22 Comments in Free-Form SEL
OGIC Control Equation Programming ............................... R.3.35
Example 3.23 Converting SEL-311 Series Relay SEL
OGIC Control Equation Variables ....................... R.3.37
Example 3.24 Converting SEL-311 Series Relay SEL
OGIC Control Equation Timers ........................... R.3.37
Example 3.25 Converting SEL-311 Series Relay Latch Bits .................................................................. R.3.37
Section 4: Communications Interfaces
Section 5: SEL Communications Protocols
Section 6: DNP 3.0 Communications
Section 7: UCA2 Communications
Section 8: ASCII Command Reference
Section 9: Settings
Appendix A: Relay Word Bits
Appendix B: Analog Quantities
Appendix C: GOMSFE Tables