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GE Multilin
L90 Line Current Differential System
5-243
5 SETTINGS
5.6 GROUPED ELEMENTS
5
c) 87L TRIP
PATH: SETTINGS
GROUPED ELEMENTS
SETTING GROUP 1(6)
SUPERVISING ELEMENTS
87L TRIP
The 87L trip element must be used to secure the generation of tripping outputs. It is especially recommended for use in all
single-pole tripping applications. It provides the user with the capability of maintaining the trip signal while the fault current
is still flowing, to choose single-pole or three-pole tripping, to employ the received direct transfer trip (DTT) signals, and to
assign supervising trip elements like the disturbance detector. The logic is used to ensure that the relay will:
•
Trip the faulted phase for a single line to ground fault, as detected by the line differential element.
•
Trip all three phases for any internal multiphase fault.
•
Trip all three phases for a second single line to ground fault during or following a single pole trip cycle.
For maximum security, it is recommended the disturbance detector (plus other elements if required) be assigned to see a
change in system status before a trip output is permitted. This ensures the relay will not issue a trip signal as a result of
incorrect settings, incorrect manipulations with a relay, or inter-relay communications problems (for example, extremely
noisy channels). The open pole detector provides forcing of three-pole tripping for sequential faults and close-onto-fault if
desired. The open pole detector feature must be employed and adequately programmed for proper operation of this fea-
ture. The
87L TRIP 1P OP
and
87L TRIP 3P OP
operands are provided to initiate single-pole or three-pole autoreclosing.
If a direct transfer trip (DTT) is not required for the 87L trip scheme to operate, it should be disabled at the remote
relay via the
GROUPED ELEMENTS
SETTING GROUP 1(6)
LINE DIFFERENTIAL ELEMENT
CURRENT DIFFEREN-
TIAL
settings menu.
•
87L TRIP FUNCTION
: This setting is used to enable or disable the element.
•
87L TRIP SOURCE
: This setting is used to assign a source for seal-in function.
•
87L TRIP MODE
: This setting is used to select either three-pole or single-pole mode of operation.
•
87L TRIP SUPV
: This setting is used to assign a trip supervising element. The
50DD SV
FlexLogic™ operand is recom-
mended (the element has to be enabled); otherwise, elements like instantaneous overcurrent, distance, etc. can be
used.
•
87L TRIP FORCE 3-
: This setting is used to select an element forcing three-pole tripping if any type fault occurs
when this element is active. Autoreclosure disabled can be utilized, or the autoreclosure counter if, for example, the
second trip is required to be a three-pole signal. Likewise, any operand representing a change in the power system
configuration, can be applied.
87L TRIP
87L TRIP FUNCTION:
Disabled
Range: Disabled, Enabled
MESSAGE
87L TRIP SOURCE:
SRC 1
Range: SRC 1, SRC 2, SRC 3, SRC 4
MESSAGE
87L TRIP MODE:
3-Pole
Range: 3-Pole, 1-Pole
MESSAGE
87L TRIP SUPV:
Off
Range: FlexLogic™ operand
MESSAGE
87L TRIP FORCE 3-
:
Off
Range: FlexLogic™ operand
MESSAGE
87L TRIP SEAL-IN:
Disabled
Range: Disabled, Enabled
MESSAGE
87L TRIP SEAL-IN
PICKUP: 0.20 pu
Range: 0.20 to 0.80 pu in steps of 0.01
MESSAGE
87L TRIP TARGET:
Self-reset
Range: Self-reset, Latched, Disabled
MESSAGE
87L TRIP EVENTS:
Disabled
Range: Disabled, Enabled
NOTE
Содержание UR Series L90
Страница 14: ...xiv L90 Line Current Differential System GE Multilin 0 1 BATTERY DISPOSAL 0 BATTERY DISPOSAL 0 ...
Страница 68: ...2 34 L90 Line Current Differential System GE Multilin 2 4 SPECIFICATIONS 2 PRODUCT DESCRIPTION 2 ...
Страница 138: ...4 30 L90 Line Current Differential System GE Multilin 4 3 FACEPLATE INTERFACE 4 HUMAN INTERFACES 4 ...
Страница 604: ...9 58 L90 Line Current Differential System GE Multilin 9 6 FAULT LOCATOR 9 THEORY OF OPERATION 9 ...
Страница 652: ...A 16 L90 Line Current Differential System GE Multilin A 1 PARAMETER LISTS APPENDIX A A ...
Страница 772: ...B 120 L90 Line Current Differential System GE Multilin B 4 MEMORY MAPPING APPENDIX B B ...
Страница 802: ...C 30 L90 Line Current Differential System GE Multilin C 7 LOGICAL NODES APPENDIX C C ...
Страница 812: ...D 10 L90 Line Current Differential System GE Multilin D 1 IEC 60870 5 104 APPENDIX D D ...
Страница 824: ...E 12 L90 Line Current Differential System GE Multilin E 2 DNP POINT LISTS APPENDIX E E ...
Страница 834: ...F 10 L90 Line Current Differential System GE Multilin F 3 WARRANTY APPENDIX F F ...
Страница 846: ...xii L90 Line Current Differential System GE Multilin INDEX ...