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Date Code 20060320 Instruction Manual SEL-311C Relay
Table of Contents
Switch-Onto-Fault Trip Logic ......................................................................................................................... 5.7
Three-Pole Open Logic ........................................................................................................................... 5.8
Circuit Breaker Operated Switch-Onto-Fault Logic ...............................................................................5.8
Close Bus Operated Switch-Onto-Fault Logic ........................................................................................ 5.9
Switch-Onto-Fault Logic Output (SOTFE) ............................................................................................. 5.9
Switch-Onto-Fault Trip Logic Trip Setting (TRSOTF) .......................................................................... 5.9
Communications-Assisted Trip Logic-General Overview ............................................................................ 5.10
Enable Setting ECOMM ....................................................................................................................... 5.10
Trip Setting TRCOMM ......................................................................................................................... 5.11
Trip Settings TRSOTF and TR .............................................................................................................. 5.11
Trip Setting DTT ................................................................................................................................... 5.11
Use Existing SEL-321 Relay Application Guides for the SEL-311C Relay ........................................ 5.12
Permissive Overreaching Transfer Trip Logic .............................................................................................. 5.13
Use Existing SEL-321 Relay POTT Application Guide for the SEL-311C ......................................... 5.13
External Inputs ...................................................................................................................................... 5.13
Timer Settings ....................................................................................................................................... 5.14
Logic Outputs ........................................................................................................................................ 5.14
Weak-Infeed Logic and Settings.................................................................................................................... 5.15
SEL-311C Weak-Infeed Logic .............................................................................................................. 5.15
Variations for Permissive Underreaching Transfer Trip (PUTT) Scheme ............................................ 5.17
Installation Variations ............................................................................................................................ 5.17
Directional Comparison Unblocking Logic .................................................................................................. 5.19
Use Existing SEL-321 DCUB Application Guide for the SEL-311C .................................................. 5.19
External Inputs ...................................................................................................................................... 5.19
Timer Settings ....................................................................................................................................... 5.20
Logic Outputs ........................................................................................................................................ 5.20
Installation Variations ............................................................................................................................ 5.23
Directional Comparison Blocking Logic....................................................................................................... 5.25
Use Existing SEL-321 DCB Application Guide for the SEL-311C ..................................................... 5.25
External Inputs ...................................................................................................................................... 5.25
Timer Settings ....................................................................................................................................... 5.25
Logic Outputs ........................................................................................................................................ 5.26
Installation Variations ............................................................................................................................ 5.28
Front-Panel Target LEDs............................................................................................................................... 5.31
Additional Target LED Information ...................................................................................................... 5.31
{TARGET RESET/LAMP TEST} Front-Panel Pushbutton ................................................................. 5.33
Section 6: Close and Reclose Logic
Overview ......................................................................................................................................................... 6.1
Close Logic ............................................................................................................................................. 6.1
Reclose Supervision Logic ...................................................................................................................... 6.1
Reclose Logic .......................................................................................................................................... 6.1
Close Logic...................................................................................................................................................... 6.2
Set Close .................................................................................................................................................. 6.2
Unlatch Close .......................................................................................................................................... 6.3
Factory Settings Example ........................................................................................................................ 6.3
Defeat the Close Logic ............................................................................................................................ 6.4
Circuit Breaker Status ............................................................................................................................. 6.4
Program an Output Contact for Closing .................................................................................................. 6.4
Reclose Supervision Logic.............................................................................................................................. 6.5
Settings and General Operation ............................................................................................................... 6.6
Settings Example ..................................................................................................................................... 6.8
Additional Settings Example 1 ................................................................................................................ 6.8
Additional Settings Example 2 .............................................................................................................. 6.10
Reclosing Relay............................................................................................................................................. 6.11
Reclosing Relay States and General Operation .....................................................................................6.11
Reclosing Relay States After a Settings or Setting Group Change ....................................................... 6.13
Defeat the Reclosing Relay ................................................................................................................... 6.13
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