viii
D90
PLUS
LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL
TABLE OF CONTENTS
Shared metering operands ..................................................................................................................574
Customizing the metering logic operands....................................................................................575
Metering logic operands........................................................................................................................576
Local interface overview.......................................................................................... 581
Annunciator panel..................................................................................................... 582
Annunciator operation ...........................................................................................................................582
Annunciator configuration ...................................................................................................................583
Dynamic symbols......................................................................................................................................589
Static symbols ............................................................................................................................................590
Metering blocks..........................................................................................................................................591
Text blocks....................................................................................................................................................593
View modes .................................................................................................................................................593
Pre-configured mimic diagrams........................................................................................................594
Metering summary editor........................................................................................ 598
User-programmable pushbuttons ......................................................................... 601
User-programmable pushbutton operation................................................................................602
User-programmable pushbuttons settings..................................................................................603
User-programmable pushbuttons editor......................................................................................606
Password security settings...................................................................................................................610
Password security operation...............................................................................................................612
Enabling the security management system ................................................................................613
Adding a new user....................................................................................................................................613
Modifying user privileges.......................................................................................................................614
Force contact inputs................................................................................................................................617
Force contact outputs ............................................................................................................................618
Self-test error messages .......................................................................................................................620
Self-test logic operands .........................................................................................................................625
Plus
distance elements................................................................................ 627
Distance element arming logic ..........................................................................................................627
Distance element time domain algorithm ....................................................................................628
Distance element frequency domain algorithm ........................................................................628
Distance supervision ...............................................................................................................................629
Distance characteristics ........................................................................................................................630
Memory polarization ...............................................................................................................................636
Distance elements analysis..................................................................................................................637
Phase distance applied to power transformers .................................................. 642