GE C70 Instruction Manual page 8

9 THEORY OF
OPERATION
10 MAINTENANCE
viii
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
9.1 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
10.1 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
C70 CAPACITOR BANK PROTECTION AND CONTROL SYSTEM - INSTRUCTION MANUAL
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