4.1 Sensitive Power Protection Implementation 266
4.2 Sensitive Power Measurements 266
4.3 Sensitive Power Logic 267
4.4 Application Notes 267
4.4.1 Sensitive Power Calculation 267
4.4.2 Sensitive Power Setting Guidelines 269
5 Transient Earth Fault Detection 270
5.1 Transient Earth Fault Detection Implementation 271
5.1.1 Transient Earth Fault Detector 271
5.1.2 Fault Type Detector 271
5.1.3 Direction Detector 271
5.2 Transient Earth Fault Detection Logic 272
5.2.1 Transient Earth Fault Detection Logic Overview 272
5.2.2 Fault Type Detector Logic 273
5.2.3 Direction Detector Logic - Standard Mode 273
5.2.4 Transient Earth Fault Detection Output Alarm Logic 273
Chapter 13 Autoreclose 275
1 Chapter Overview 277
2 Introduction to 3-phase Autoreclose 278
3 Implementation 279
4 Autoreclose Function Inputs 280
4.1 CB Healthy 280
4.2 Block AR 280
4.3 Reset Lockout 280
4.4 AR Auto Mode 280
4.5 Auto Mode 280
4.6 LiveLine Mode 280
4.7 Telecontrol Mode 280
4.8 Circuits OK 280
4.9 AR Sys Checks OK (403) 281
4.10 Ext AR Prot Trip (External AR Protection Trip) 281
4.11 Ext AR Prot Start (External AR Protection Start) 281
4.12 DAR Complete (Delayed Autoreclose Complete) 281
4.13 CB in Service (Circuit Breaker in Service) 281
4.14 AR Restart 281
4.15 DT OK To Start (Dead Time OK to Start) 281
4.16 DeadTime Enabled 282
4.17 AR Init TripTest (Initiate Trip Test) 282
4.18 AR Skip Shot 1 282
4.19 Inh Reclaim Time (Inhibit Reclaim Time) 282
5 Autoreclose Function Outputs 283
5.1 AR In Progress 283
5.2 AR in Progress 1 (DAR In Progress) 283
5.3 Sequence Counter Status DDB signals 283
5.4 Successful Close 283
5.5 AR In Service 283
5.6 Block Main Prot (Block Main Protection) 283
5.7 Block SEF Prot (Block SEF Protection) 283
5.8 Reclose Checks 283
5.9 DeadT In Prog (Dead Time in Progress) 284
5.10 DT Complete (Dead Time Complete) 284
5.11 AR Sync Check (AR Synchronisation Check) 284
5.12 AR SysChecks OK (AR System Checks OK) 284
5.13 Auto Close 284
5.14 Protection Lockt (Protection Lockout) 284
Contents P14x
viii P14xEd1-TM-EN-1