GE L60 Instruction Manual page 7

Line phase comparison system, ur series
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GE Multilin
TABLE OF CONTENTS
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 ................................................................................... 8-4
8.1.6
DUAL PERMISSION SECURITY ACCESS ....................................................... 8-4
8.2.1
OVERVIEW........................................................................................................ 8-6
8.2.2
ENABLING THE SECURITY MANAGEMENT SYSTEM ................................... 8-6
8.2.3
ADDING A NEW USER ..................................................................................... 8-6
8.2.4
MODIFYING USER PRIVILEGES ..................................................................... 8-7
9.1.1
INTRODUCTION................................................................................................ 9-1
9.1.2
FUNDAMENTAL PRINCIPLE OF PHASE COMPARISON ............................... 9-1
9.1.3
VARIATIONS IN PHASE COMPARISON SCHEMES ....................................... 9-6
9.1.4
PHASE COMPARISON EXCITATION ............................................................... 9-6
9.1.5
BLOCKING VS. TRIPPING SCHEMES ........................................................... 9-10
9.1.6
SINGLE VS. DUAL PHASE COMPARISON.................................................... 9-18
9.1.7
REFINEMENTS TO BASIC SCHEMES ........................................................... 9-20
9.1.8
MULTI-TERMINAL LINES................................................................................ 9-23
9.1.9
CHARGING CURRENT COMPENSATION ..................................................... 9-23
9.1.10
L60 SIGNAL PROCESSING ............................................................................ 9-25
9.2.1
OVERVIEW...................................................................................................... 9-33
9.2.2
PHASE SELECTION........................................................................................ 9-36
9.3.1
FAULT TYPE DETERMINATION..................................................................... 9-38
10.1.1
DESCRIPTION................................................................................................. 10-1
10.1.2
USE OF SETTINGS......................................................................................... 10-1
10.1.3
SETTINGS EXAMPLE ..................................................................................... 10-3
10.2.1
DESCRIPTION................................................................................................. 10-4
10.2.2
LINES WITH TAPPED TRANSFORMERS ...................................................... 10-5
10.2.3
TRANSFORMER LOAD CURRENTS.............................................................. 10-5
10.2.4
LV-SIDE FAULTS ............................................................................................ 10-5
10.2.5
TRANSFORMER INRUSH CURRENT ............................................................ 10-5
10.2.6
TRACTIONAL LOAD........................................................................................ 10-6
10.2.7
SENSITIVITY ISSUES ..................................................................................... 10-7
10.2.8
SINGLE-POLE TRIPPING APPLICATIONS .................................................... 10-8
10.2.9
PHASE DISTANCE.......................................................................................... 10-9
10.2.10 GROUND DISTANCE .................................................................................... 10-10
10.3.1
DESCRIPTION............................................................................................... 10-11
10.4.1
DISTANCE SETTINGS .................................................................................. 10-12
10.5.1
OVERVIEW.................................................................................................... 10-13
10.5.2
TWO BREAKER CONFIGURATION ............................................................. 10-14
L60 Line Phase Comparison System
vii

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