GE UR Series B30 Instruction Manual page 7

9. THEORY OF OPERATION
10. APPLICATION OF
SETTINGS
11. MAINTENANCE
GE Multilin
TABLE OF CONTENTS
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 INTRODUCTION
9.1.1 BUS DIFFERENTIAL PROTECTION................................................................. 9-1
9.2 DYNAMIC BUS REPLICA
9.2.1 DYNAMIC BUS REPLICA MECHANISM ........................................................... 9-2
9.2.2 CT RATIO MATCHING ...................................................................................... 9-3
9.3 DIFFERENTIAL PRINCIPLE
9.3.1 BIASED DIFFERENTIAL CHARACTERISTIC ................................................... 9-4
9.3.2 DIFFERENTIAL AND RESTRAINING CURRENTS .......................................... 9-5
9.3.3 ENHANCED SECURITY .................................................................................... 9-6
9.4 DIRECTIONAL PRINCIPLE
9.4.1 CURRENT DIRECTIONAL PROTECTION ........................................................ 9-7
9.5 SATURATION DETECTOR
9.5.1 CT SATURATION DETECTION ........................................................................ 9-8
9.6 OUTPUT LOGIC AND EXAMPLES
9.6.1 OUTPUT LOGIC ................................................................................................ 9-9
9.6.2 INTERNAL AND EXTERNAL FAULT EXAMPLE .............................................. 9-9
10.1 OVERVIEW
10.1.1 INTRODUCTION.............................................................................................. 10-1
10.1.2 SAMPLE BUSBAR AND DATA........................................................................ 10-1
10.2 ZONING AND DYNAMIC BUS REPLICA
10.2.1 DESCRIPTION................................................................................................. 10-3
10.2.2 NORTH BUS ZONE ......................................................................................... 10-3
10.2.3 SOUTH BUS ZONE ......................................................................................... 10-4
10.3 BIASED CHARACTERISTIC BREAKPOINTS
10.3.1 DESCRIPTION................................................................................................. 10-5
10.3.2 HIGH BREAKPOINT ........................................................................................ 10-5
10.3.3 LOW BREAKPOINT......................................................................................... 10-6
10.4 SLOPES AND HIGH SET THRESHOLD
10.4.1 DESCRIPTION................................................................................................. 10-7
10.4.2 EXTERNAL FAULTS ON C-1 .......................................................................... 10-7
10.4.3 EXTERNAL FAULTS ON C-2 .......................................................................... 10-9
10.4.4 EXTERNAL FAULTS ON C-3 .......................................................................... 10-9
10.4.5 EXTERNAL FAULTS ON C-4 ........................................................................ 10-10
10.4.6 EXTERNAL FAULTS ON C-5 ........................................................................ 10-10
10.5 BUS DIFFERENTIAL SETTINGS
10.5.1 DESCRIPTION............................................................................................... 10-11
10.6 ENHANCING RELAY PERFORMANCE
10.6.1 USING SETTING GROUPS........................................................................... 10-12
11.1 UNINSTALL AND CLEAR FILES AND DATA
11.1.1 UNINSTALL AND CLEAR FILES AND DATA.................................................. 11-1
11.2 REPAIRS
11.2.1 REPAIRS ......................................................................................................... 11-2
11.3 STORAGE
11.3.1 STORAGE........................................................................................................ 11-3
B30 Bus Differential System vii