GE C70 - Page 8

viii C70 CAPACITOR BANK PROTECTION AND CONTROL SYSTEM – INSTRUCTION MANUAL
TABLE OF CONTENTS
8.2.3 Delta connected banks ......................................................................................................8-4
8.2.4 H-configuration .....................................................................................................................8-4
8.2.5 Tapped configuration .........................................................................................................8-4
8.2.6 Summary...................................................................................................................................8-4
8.3 Protection methods for capacitor banks ...........................................................8-5
8.3.1 Overview ...................................................................................................................................8-5
8.3.2 Capacitor unbalance protection....................................................................................8-5
8.3.3 Protection for rack faults (arc-over within capacitor banks).........................8-10
8.3.4 Overvoltage ..........................................................................................................................8-10
8.3.5 Overcurrent...........................................................................................................................8-11
8.3.6 Loss of bus voltage ...........................................................................................................8-11
8.4 Settings example ..................................................................................................8-11
8.4.1 Overview ................................................................................................................................8-11
8.4.2 VT and CT setup..................................................................................................................8-12
8.4.3 Source assignment ...........................................................................................................8-14
8.4.4 Bank unbalance calculations.......................................................................................8-14
8.4.5 Bank voltage differential settings ..............................................................................8-16
8.4.6 Bank phase current unbalance settings.................................................................8-18
8.4.7 Bank phase overvoltage settings...............................................................................8-19
8.4.8 Bank phase undervoltage settings............................................................................8-20
8.4.9 Bank overcurrent protection ........................................................................................8-21
9 THEORY OF
OPERATION
9.1 Overview ..................................................................................................................9-1
9.1.1 General operation.................................................................................................................9-1
9.1.2 Bank phase overvoltage (ANSI 59B).............................................................................9-1
9.1.3 Voltage differential (ANSI 87V)........................................................................................9-3
9.1.4 Compensated bank neutral voltage unbalance (ANSI 59NU)..........................9-7
9.1.5 Phase current unbalance (ANSI 60P) ........................................................................9-11
9.1.6 Neutral current unbalance (ANSI 60N).....................................................................9-14
10 MAINTENANCE 10.1 Monitoring .............................................................................................................10-1
10.1.1 Devices with Site Targets ...............................................................................................10-1
10.1.2 Data with Modbus Analyzer..........................................................................................10-1
10.2 General maintenance ..........................................................................................10-3
10.2.1 In-service maintenance..................................................................................................10-3
10.2.2 Out-of-service maintenance ........................................................................................10-3
10.2.3 Unscheduled maintenance (system interruption) ..............................................10-3
10.3 Retrieve files..........................................................................................................10-3
10.3.1 CyberSentry security event files..................................................................................10-4
10.4 Convert device settings.......................................................................................10-5
10.5 Copy settings to other device ............................................................................10-7
10.6 Compare settings .................................................................................................10-7
10.6.1 Compare against defaults .............................................................................................10-7
10.6.2 Compare two devices ......................................................................................................10-8
10.7 Back up and restore settings .............................................................................10-8
10.7.1 Back up settings .................................................................................................................10-8
10.7.2 Restore settings............................................................................................................... 10-11
10.8 Upgrade software.............................................................................................. 10-13
10.9 Upgrade firmware ............................................................................................. 10-14
10.10 Replace front panel........................................................................................... 10-15
10.11 Replace module ................................................................................................. 10-23
10.12 Battery................................................................................................................. 10-24
10.12.1 Replace battery for SH/SL power supply............................................................. 10-24
10.12.2 Dispose of battery .......................................................................................................... 10-25