GE D60 Instruction Manual page 9

8. SECURITY
9. THEORY OF OPERATION
10. APPLICATION OF
SETTINGS
GE Multilin
TABLE OF CONTENTS
7.2 TARGETS
7.2.1 TARGETS MENU............................................................................................... 7-6
7.2.2 TARGET MESSAGES ....................................................................................... 7-6
7.2.3 RELAY SELF-TESTS......................................................................................... 7-6
8.1 PASSWORD SECURITY
8.1.1 OVERVIEW........................................................................................................ 8-1
8.1.2 PASSWORD SECURITY MENU ....................................................................... 8-2
8.1.3 LOCAL PASSWORDS ....................................................................................... 8-2
8.1.4 REMOTE PASSWORDS ................................................................................... 8-3
8.1.5 ACCESS SUPERVISION ................................................................................... 8-3
8.1.6 DUAL PERMISSION SECURITY ACCESS ....................................................... 8-4
8.2 SETTINGS SECURITY
8.2.1 SETTINGS TEMPLATES ................................................................................... 8-6
8.2.2 SECURING AND LOCKING FLEXLOGIC™ EQUATIONS ............................. 8-10
8.2.3 SETTINGS FILE TRACEABILITY .................................................................... 8-12
8.3 ENERVISTA SECURITY MANAGEMENT SYSTEM
8.3.1 OVERVIEW...................................................................................................... 8-15
8.3.2 ENABLING THE SECURITY MANAGEMENT SYSTEM ................................. 8-15
8.3.3 ADDING A NEW USER ................................................................................... 8-15
8.3.4 MODIFYING USER PRIVILEGES ................................................................... 8-16
9.1 DISTANCE ELEMENTS
9.1.1 INTRODUCTION................................................................................................ 9-1
9.1.2 PHASOR ESTIMATION ..................................................................................... 9-1
9.1.3 DISTANCE CHARACTERISTICS ...................................................................... 9-2
9.1.4 MEMORY POLARIZATION................................................................................ 9-6
9.1.5 DISTANCE ELEMENTS ANALYSIS .................................................................. 9-7
9.2 PHASE DISTANCE APPLIED TO POWER TRANSFORMERS
9.2.1 DESCRIPTION................................................................................................. 9-11
9.2.2 EXAMPLE ........................................................................................................ 9-14
9.3 GROUND DIRECTIONAL OVERCURRENT
9.3.1 DESCRIPTION................................................................................................. 9-16
9.3.2 EXAMPLE ........................................................................................................ 9-16
9.4 SERIES COMPENSATED LINES
9.4.1 DESCRIPTION................................................................................................. 9-18
9.5 SINGLE-POLE TRIPPING
9.5.1 OVERVIEW...................................................................................................... 9-21
9.5.2 PHASE SELECTION........................................................................................ 9-24
9.5.3 COMMUNICATIONS CHANNELS FOR PILOT-AIDED SCHEMES ................ 9-25
9.5.4 PERMISSIVE ECHO SIGNALING ................................................................... 9-33
9.5.5 PILOT SCHEME / PHASE SELECTOR COORDINATION .............................. 9-34
9.5.6 CROSS-COUNTRY FAULT EXAMPLE ........................................................... 9-35
9.6 FAULT LOCATOR
9.6.1 FAULT TYPE DETERMINATION..................................................................... 9-36
10.1 APPLICATION GUIDELINES
10.1.1 INTRODUCTION.............................................................................................. 10-1
10.1.2 IMPACT OF MEMORY POLARIZATION ......................................................... 10-1
10.1.3 HIGH-SET OVERCURRENT ELEMENTS ....................................................... 10-1
10.2 DISTANCE ELEMENTS (STEPPED DISTANCE SCHEME)
10.2.1 PHASE DISTANCE.......................................................................................... 10-2
10.2.2 GROUND DISTANCE ...................................................................................... 10-3
D60 Line Distance Protection System ix