GE L90

INDEX
L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL iii
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HTTP port ...........................................................................................5-100
IEC 60870-5-104 port ..................................................................5-102
Modbus port ........................................................................................5-52
SNTP port ...........................................................................................5-112
TFTP port ............................................................................................5-101
Web access port ............................................................................5-100
Comm status remaining connections .....................................6-10
Command line interface to software .........................................C-1
Command password .............................................................4-61, 5-11
Commands
control user accounts .....................................................................5-15
menu .........................................................................................................7-1
with IEC 61850 ...................................................................................5-95
Communications
10BASE-F ..............................................................................................5-46
channel ..................................................................................................3-33
channel monitoring ........................................................................... 2-7
connecting to the UR ..........................................................3-59, 3-62
direct transfer trip .............................................................................. 2-8
DNP ..........................................................................................................5-53
HTTP .....................................................................................................5-100
IEC 60870-5-10 ...............................................................................5-103
IEC 60870-5-104 ............................................................................5-101
inter-relay ............................................................................................... 2-5
inter-relay specifications ...............................................................2-49
loopback test ..........................................................................2-7, 5-432
Modbus registers ...........................................................................5-108
Modbus settings ................................................................................5-51
modem ..................................................................................................3-61
overview .................................................................................................. 2-5
Protocol selection .............................................................................5-52
RS232 .........................................................................................3-29, 5-43
RS485 .........................................................................................3-31, 5-43
settings ......................................................................................5-46, 5-53
specifications ..........................................................................2-48, 2-49
timeout ..................................................................................................5-52
web server ........................................................................................5-100
Compare settings ................................................................................11-7
Compensated overvoltage
FlexLogic operands .......................................................................5-192
logic diagram ...................................................................................5-314
settings ...............................................................................................5-312
specifications ......................................................................................2-37
Compliance .............................................................................................2-53
COMTRADE files, view ........................................................................4-81
Conducted RFI specifications .......................................................2-52
Connection timeout ............................................................................5-52
Connectors, LC and ST ......................................................................3-11
Contact inputs
actual values ......................................................................................... 6-4
explained ...........................................................................................5-414
FlexLogic operands .......................................................................5-200
settings ...............................................................................................5-413
specifications ......................................................................................2-44
thresholds .........................................................................................5-413
wet and dry connections ..............................................................3-22
Contact outputs
actual values .........................................................................................6-5
explained ............................................................................................5-416
FlexLogic operands .......................................................................5-200
settings ...............................................................................................5-416
Continuous monitor
FlexLogic operands .......................................................................5-192
logic diagram ...................................................................................5-364
settings ...............................................................................................5-363
Control elements ...............................................................................5-324
Control power
description ...........................................................................................3-13
specifications .....................................................................................2-47
Control pushbuttons
FlexLogic operands .......................................................................5-190
logic diagram ...................................................................................5-127
settings ...............................................................................................5-126
specifications .....................................................................................2-41
Convert device settings ...................................................................11-5
Copy of Copy of ....................................................................................11-7
Copy settings for upgrading .........................................................11-5
Copy settings to other device ......................................................11-7
Counters
actual values .........................................................................................6-8
settings ...............................................................................................5-350
CPU module diagram .......................................................................3-11
CPU, new types T, U, V ....................................................................11-15
Critical failure relay specifications ............................................2-46
CSA certification ..................................................................................2-53
CT bank settings ................................................................................5-137
CT failure
FlexLogic operands .......................................................................5-193
logic diagram ...................................................................................5-366
settings ...............................................................................................5-364
CT inputs ...........................................................................3-14, 5-8, 5-137
CT requirements .....................................................................................8-1
CT saturation analysis tool ...............................................................8-2
CT wiring ...................................................................................................3-15
Current bank ........................................................................................5-137
Current demand ................................................................................5-119
Current differential
actual values ......................................................................................6-16
FlexLogic operands .......................................................................5-190
logic diagram ...................................................................................5-220
settings ...............................................................................................5-217
specifications .....................................................................................2-33
trip .........................................................................................................5-318
Current metering actual values ..................................................6-17
Curves
definite time .......................................................................5-261, 5-302
FlexCurves ..........................................................................5-160, 5-261
IAC .........................................................................................................5-259
IEC .........................................................................................................5-257
IEEE .......................................................................................................5-256
inverse time undervoltage .........................................................5-302
types .....................................................................................................5-256
Cutout, panel ...................................................................................3-2, 3-5