GE L60 Instruction Manual

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Contents

GE L60 Instruction Manual Manual pdf 7 page image

GE Multilin L60 Line Phase Comparison System viiTABLE OF CONTENTS8.1.5 PASSWORD REQUIREMENTS ........................................................................ 8-38.2 CYBERSENTRY8.2.1 OVERVIEW........................................................................................................ 8-48.2.2 SECURITY MENU ............................................................................................. 8-69. THEORY OF OPERATION 9.1 OVERVIEW9.1.1 INTRODUCTION................................................................................................ 9-19.1.2 FUNDAMENTAL PRINCIPLE OF PHASE COMPARISON ............................... 9-19.1.3 VARIATIONS IN PHASE COMPARISON SCHEMES ....................................... 9-69.1.4 PHASE COMPARISON EXCITATION............................................................... 9-69.1.5 BLOCKING VS. TRIPPING SCHEMES ........................................................... 9-109.1.6 SINGLE VS. DUAL PHASE COMPARISON.................................................... 9-189.1.7 REFINEMENTS TO BASIC SCHEMES........................................................... 9-209.1.8 MULTI-TERMINAL LINES................................................................................ 9-239.1.9 CHARGING CURRENT COMPENSATION ..................................................... 9-239.1.10 L60 SIGNAL PROCESSING ............................................................................ 9-259.2 SINGLE-POLE TRIPPING9.2.1 OVERVIEW...................................................................................................... 9-339.2.2 PHASE SELECTION........................................................................................ 9-369.3 FAULT LOCATOR9.3.1 FAULT TYPE DETERMINATION..................................................................... 9-3810. APPLICATION OFSETTINGS10.1 PHASE COMPARISON ELEMENT 87PC10.1.1 DESCRIPTION................................................................................................. 10-110.1.2 USE OF SETTINGS......................................................................................... 10-110.1.3 SETTINGS EXAMPLE ..................................................................................... 10-310.2 DISTANCE BACKUP/SUPERVISION10.2.1 DESCRIPTION................................................................................................. 10-410.2.2 LINES WITH TAPPED TRANSFORMERS ...................................................... 10-510.2.3 TRANSFORMER LOAD CURRENTS.............................................................. 10-510.2.4 LV-SIDE FAULTS ............................................................................................ 10-510.2.5 TRANSFORMER INRUSH CURRENT ............................................................ 10-510.2.6 TRACTIONAL LOAD........................................................................................ 10-610.2.7 SENSITIVITY ISSUES ..................................................................................... 10-710.2.8 SINGLE-POLE TRIPPING APPLICATIONS .................................................... 10-810.2.9 PHASE DISTANCE.......................................................................................... 10-910.2.10 GROUND DISTANCE .................................................................................... 10-1010.3 POTT SIGNALING SCHEME10.3.1 DESCRIPTION............................................................................................... 10-1110.4 SERIES COMPENSATED LINES10.4.1 DISTANCE SETTINGS .................................................................................. 10-1210.5 UNDERSTANDING L60 OSCILLOGRAPHY10.5.1 OVERVIEW.................................................................................................... 10-1310.5.2 TWO BREAKER CONFIGURATION ............................................................. 10-1411. MAINTENANCE 11.1 MODULES11.1.1 REPLACE A MODULE..................................................................................... 11-111.2 BATTERIES11.2.1 REPLACE BATTERY....................................................................................... 11-311.2.2 DISPOSE OF BATTERY.................................................................................. 11-411.3 UNINSTALL AND CLEAR FILES AND DATA11.3.1 UNINSTALL AND CLEAR FILES AND DATA.................................................. 11-711.4 REPAIRS11.4.1 REPAIRS ......................................................................................................... 11-8