GE D90 Plus Instruction Manual page 8

12 LOCAL INTERFACE
13 SECURITY
14 TESTING
15 THEORY OF
OPERATION
viii
Using shared operands in metering ...................................................................... 573
Shared metering operands ..................................................................................................................574
Customizing the metering logic operands....................................................................................575
Metering logic operands........................................................................................................................576
Metering FlexAnalog™ parameters ....................................................................... 577
Local interface overview .......................................................................................... 581
Annunciator panel..................................................................................................... 582
Annunciator operation ...........................................................................................................................582
Annunciator configuration ...................................................................................................................583
Mimic diagram editor ............................................................................................... 588
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 ..................................................................................................... 609
Password security settings...................................................................................................................610
Password security operation...............................................................................................................612
EnerVista security management system .............................................................. 613
Enabling the security management system ................................................................................613
Adding a new user....................................................................................................................................613
Modifying user privileges.......................................................................................................................614
Test mode ................................................................................................................... 617
Force contact inputs................................................................................................................................617
Force contact outputs ............................................................................................................................618
Self-tests ..................................................................................................................... 619
Self-test error messages .......................................................................................................................620
Self-test logic operands .........................................................................................................................625
Plus
The D90 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
Example system with power transformers...................................................................................645
Ground directional overcurrent theory................................................................. 647
Ground directional overcurrent example ......................................................................................648
Series compensated lines ........................................................................................ 648
Memory polarized directional comparators.................................................................................649
PLUS
D90 LINE DISTANCE PROTECTION SYSTEM - INSTRUCTION MANUAL
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