GE C70 Instruction Manual page 7

10. MAINTENANCE
A. FLEXANALOG AND
FLEXINTEGER
PARAMETERS
B. MODBUS
COMMUNICATIONS
GE Multilin
TABLE OF CONTENTS
9.1.4 FUSELESS CAPACITORS ................................................................................ 9-2
9.1.5 UNFUSED CAPACITORS ................................................................................. 9-2
9.2 CONNECTIONS OF SHUNT CAPACITOR BANKS
9.2.1 GROUNDED WYE-CONNECTED BANKS ........................................................ 9-3
9.2.2 UNGROUNDED WYE-CONNECTED BANKS................................................... 9-3
9.2.3 DELTA-CONNECTED BANKS .......................................................................... 9-3
9.2.4 H-CONFIGURATION ......................................................................................... 9-3
9.2.5 TAPPED CONFIGURATION.............................................................................. 9-3
9.2.6 SUMMARY......................................................................................................... 9-4
9.3 PROTECTION METHODS FOR CAPACITOR BANKS
9.3.1 DESCRIPTION................................................................................................... 9-5
9.3.2 CAPACITOR UNBALANCE PROTECTION....................................................... 9-5
9.3.3 PROTECTION FOR RACK FAULTS ............................................................... 9-10
9.3.4 OVERVOLTAGE .............................................................................................. 9-10
9.3.5 OVERCURRENT ............................................................................................. 9-11
9.3.6 LOSS OF BUS VOLTAGE ............................................................................... 9-11
9.4 SETTING EXAMPLE
9.4.1 DESCRIPTION................................................................................................. 9-12
9.4.2 VT AND CT SETUP ......................................................................................... 9-13
9.4.3 SOURCE ASSIGNMENT ................................................................................. 9-14
9.4.4 BANK UNBALANCE CALCULATIONS ............................................................ 9-14
9.4.5 BANK VOLTAGE DIFFERENTIAL SETTINGS ................................................ 9-16
9.4.6 BANK PHASE CURRENT UNBALANCE SETTINGS...................................... 9-18
9.4.7 BANK PHASE OVERVOLTAGE SETTINGS ................................................... 9-19
9.4.8 BANK PHASE UNDERVOLTAGE SETTINGS ................................................ 9-20
9.4.9 BANK OVERCURRENT PROTECTION .......................................................... 9-21
10.1 MODULES
10.1.1 REPLACE A MODULE..................................................................................... 10-1
10.2 BATTERIES
10.2.1 REPLACE BATTERY....................................................................................... 10-3
10.2.2 DISPOSE OF BATTERY.................................................................................. 10-4
A.1 PARAMETER LISTS
A.1.1 FLEXANALOG ITEMS .......................................................................................A-1
A.1.2 FLEXINTEGER ITEMS ....................................................................................A-30
B.1 MODBUS RTU PROTOCOL
B.1.1 INTRODUCTION................................................................................................B-1
B.1.2 PHYSICAL LAYER.............................................................................................B-1
B.1.3 DATA LINK LAYER............................................................................................B-1
B.1.4 CRC-16 ALGORITHM........................................................................................B-2
B.2 MODBUS FUNCTION CODES
B.2.1 SUPPORTED FUNCTION CODES ...................................................................B-3
B.2.2 READ ACTUAL VALUES OR SETTINGS (FUNCTION CODE 03/04H) ...........B-3
B.2.3 EXECUTE OPERATION (FUNCTION CODE 05H) ...........................................B-4
B.2.4 STORE SINGLE SETTING (FUNCTION CODE 06H) .......................................B-4
B.2.5 STORE MULTIPLE SETTINGS (FUNCTION CODE 10H) ................................B-5
B.2.6 EXCEPTION RESPONSES ...............................................................................B-5
B.3 FILE TRANSFERS
B.3.1 OBTAINING RELAY FILES VIA MODBUS ........................................................B-6
B.3.2 MODBUS PASSWORD OPERATION ...............................................................B-7
B.4 MEMORY MAPPING
B.4.1 MODBUS MEMORY MAP .................................................................................B-8
B.4.2 DATA FORMATS .............................................................................................B-69
C70 Capacitor Bank Protection and Control System vii