5-212
G30 Generator Protection System
GE Multilin
5.6 GROUPED ELEMENTS
5 SETTINGS
5
5.6.14 STATOR GROUND
a) MAIN MENU
PATH: SETTINGS
GROUPED ELEMENTS
SETTING GROUP 1(6)
STATOR GROUND
Third harmonic neutral undervoltage protection that responds to the third harmonic in the voltage at the machine neutral
point is provided as a means of stator ground protection.
This element is configured through its individual setting menu. The
STATOR GROUND SOURCE
setting specifies a signal
source used to provide current and voltage signals for stator ground fault protection. The third harmonic neutral undervolt-
age function is configured as follows:
•
Phase voltages measured at the terminal of the machine shall be configured as phase VT banks. The element uses
the voltages to measure the power at the machine terminals for power supervision.
•
Phase currents measured at the terminal of the machine shall be configured as phase CT banks. The element uses
the currents to measures the power at the machine terminals for power supervision.
•
Voltage measured at the neutral of the machine shall be configured as the auxiliary VT bank. The element extracts the
third harmonic of the auxiliary voltage from the source in order to operate.
b) THIRD HARMONIC NEUTRAL UNDERVOLTAGE
(ANSI 27TN)
PATH: SETTINGS
GROUPED ELEMENTS
SETTING GROUP 1(6)
STATOR GROUND
3RD HARM NTRL UNDERVOLTAGE
The third harmonic neutral undervoltage function detects a loss of third harmonic voltage at the generator neutral. The per-
centage of stator winding covered by this function depends on the pickup setting and the amount of third harmonic gener-
ated by the machine at the time of the fault. A settable window of forward power can supervise this element for enhanced
security. The element is also supervised by positive-sequence voltage measured at the generator output terminals. This
element can be used with either wye or delta connected VTs on the terminal side and requires the machine neutral voltage
to be connected via an auxiliary voltage channel of a relay VT bank.
STATOR
GROUND
STATOR GROUND
SOURCE: SRC1
Range: SRC 1, SRC 2, SRC 3, SRC 4
MESSAGE
3RD HARM NTRL
UNDERVOLTAGE
3RD HARM NTRL
UNDERVOLTAGE
3RD HARM NTRL UV
FUNCTION: Disabled
Range: Disabled, Enabled
MESSAGE
3RD HARM NTRL UV
PICKUP: 0.3000 pu
Range: 0.0000 to 3.0000 pu in steps of 0.0001
MESSAGE
3RD HARM NTRL UV PKP
DELAY: 0.00 s
Range: 0.00 to 600.00 s in steps of 0.01
MESSAGE
3RD HARM NTRL UV MAX
POWER: 0.200 pu
Range: 0.000 to 1.250 pu in steps of 0.001
MESSAGE
3RD HARM NTRL UV MIN
POWER: 0.200 pu
Range: 0.000 to 1.250 pu in steps of 0.001
MESSAGE
3RD HARM NTRL UV
VOLT SUPV: 0.500 pu
Range: 0.000 to 1.250 pu in steps of 0.001
MESSAGE
3RD HARM NTRL UV BLK:
Off
Range: FlexLogic operand
MESSAGE
3RD HARM NTRL UV
TARGET: Self-reset
Range: Self-reset, Latched, Disabled
MESSAGE
3RD HARM NTRL UV
EVENTS: Disabled
Range: Disabled, Enabled
Содержание G30
Страница 10: ...x G30 Generator Protection System GE Multilin TABLE OF CONTENTS ...
Страница 30: ...1 20 G30 Generator Protection System GE Multilin 1 5 USING THE RELAY 1 GETTING STARTED 1 ...
Страница 414: ...5 274 G30 Generator Protection System GE Multilin 5 10 TESTING 5 SETTINGS 5 ...
Страница 456: ...8 2 G30 Generator Protection System GE Multilin 8 1 DIRECTIONAL PRINCIPLE 8 THEORY OF OPERATION 8 ...
Страница 470: ...9 14 G30 Generator Protection System GE Multilin 9 1 SETTING EXAMPLE 9 APPLICATION OF SETTINGS 9 ...
Страница 484: ...11 12 G30 Generator Protection System GE Multilin 11 6 DISPOSAL 11 MAINTENANCE 11 ...
Страница 512: ...A 28 G30 Generator Protection System GE Multilin A 1 PARAMETER LISTS APPENDIX A A ...
Страница 620: ...B 108 G30 Generator Protection System GE Multilin B 4 MEMORY MAPPING APPENDIX B B ...
Страница 666: ...E 10 G30 Generator Protection System GE Multilin E 1 IEC 60870 5 104 APPENDIX E E ...
Страница 678: ...F 12 G30 Generator Protection System GE Multilin F 2 DNP POINT LISTS APPENDIX F F ...
Страница 687: ...GE Multilin G30 Generator Protection System H 7 APPENDIX H H 2 ABBREVIATIONS H Z Impedance Zone ...