GE Multilin
G60 Generator Protection System
5-251
5 SETTINGS
5.6 GROUPED ELEMENTS
5
FIELD CURRENT MONITORING:
The G60 can monitor the field current via a Hall effect transducer that produces a 4 to 20 mA output. This device must be
wired to a dcmA input of the G60 or a Brick in HardFiber system. Note that the relay must be configured with a transducer
input card for the former case. Assignment of this signal to the field ground function allows the user to detect a field over-
current or undercurrent condition. The maximum and minimum settings configured for scaling of this dcmA input shall be
used to get the per-unit values of field current.
b) FIELD GROUND
PATH: SETTINGS
GROUPED ELEMENTS
SETTING GROUP 1(6)
FIELD GROUND PROTECTION
FIELD GROUND
The following settings are available for the field ground fault detector function.
•
FIELD GROUND INJECTION FREQUENCY
: This setting specifies the frequency of the signal to be injected into the
field winding for detecting ground faults. The injection frequency selection will depend on the value of field winding
capacitance to ground. The following simple formula can be used to set the injection frequency when the field winding
capacitance is known in
μ
F.
(EQ 5.46)
FIELD
GROUND
FIELD GROUND
FUNCTION: Disabled
Range: Disabled, Enabled
MESSAGE
FIELD GROUND INJECTION
FREQUENCY: 1.0 Hz
Range: 0.1 to 3.0 Hz in steps of 0.1
MESSAGE
INJ CONNECTION TYPE:
Single Point
Range: Single Point, Double Point
MESSAGE
FIELD GROUND STG1
PICKUP: 20 k
Ω
Range: 1 to 500 k
Ω
in steps of 1
MESSAGE
FIELD GROUND STG1
DELAY:
10.0 s
Range: 0.1 to 600.0 s in steps of 0.1
MESSAGE
FIELD GROUND STG2
PICKUP: 5 k
Ω
Range: 1 to 500 k
Ω
in steps of 1
MESSAGE
FIELD GROUND STG2
DELAY:
3.0 s
Range: 0.1 to 600.0 s in steps of 0.1
MESSAGE
FIELD GROUND UC
PICKUP: 1.00 mA
Range: 0.05 to 100.00 mA in steps of 0.1
MESSAGE
FIELD GROUND UC
DELAY: 1.0 s
Range: 0.10 to 600.00 s in steps of 0.1
MESSAGE
FIELD GROUND BLK:
Off
Range: FlexLogic operand
MESSAGE
FIELD GROUND
TARGET: Self-reset
Range: Self-reset, Latched, Disabled
MESSAGE
FIELD GROUND
EVENTS: Disabled
Range: Disabled, Enabled
F
inj
2.5
C
F
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Summary of Contents for Multilin g60
Page 10: ...x G60 Generator Protection System GE Multilin TABLE OF CONTENTS INDEX ...
Page 32: ...1 22 G60 Generator Protection System GE Multilin 1 5 USING THE RELAY 1 GETTING STARTED 1 ...
Page 160: ...4 30 G60 Generator Protection System GE Multilin 4 3 FACEPLATE INTERFACE 4 HUMAN INTERFACES 4 ...
Page 486: ...5 326 G60 Generator Protection System GE Multilin 5 10 TESTING 5 SETTINGS 5 ...
Page 518: ...6 32 G60 Generator Protection System GE Multilin 6 5 PRODUCT INFORMATION 6 ACTUAL VALUES 6 ...
Page 532: ...7 14 G60 Generator Protection System GE Multilin 7 2 TARGETS 7 COMMANDS AND TARGETS 7 ...
Page 748: ...D 10 G60 Generator Protection System GE Multilin D 1 IEC 60870 5 104 APPENDIX D D ...
Page 760: ...E 12 G60 Generator Protection System GE Multilin E 2 DNP POINT LISTS APPENDIX E E ...