GE Multilin
L30 Line Current Differential System
5-183
5 SETTINGS
5.6 GROUPED ELEMENTS
5
•
DD LOGIC SEAL-IN
: This setting is used to maintain disturbance detector output for such conditions as balanced
three-phase fault, low level time overcurrent fault, etc. whenever the disturbance detector might reset. Output of the
disturbance detector will be maintained until the chosen FlexLogic operand resets.
The user may disable the
DD EVENTS
setting as the disturbance detector element will respond to any current distur-
bance on the system which may result in filling the events buffer and possible loss of valuable data.
Figure 5–86: DISTURBANCE DETECTOR SCHEME LOGIC
NOTE
827044A6.CDR
SETTING
SETTING
SETTING
Off=0
Off=0
Off=0
DD NON-CURRENT
SUPV:
DD CONTROL
LOGIC:
DD LOGIC
SEAL-IN:
DD FUNCTION:
COMPUTE SEQ.
CURRENTS
DELTA LEVEL
DETECTOR
ADAPTIVE LEVEL
DETECTOR
RUN
RUN
LOGIC
LOGIC
SETTING
ACTUAL
FLEXLOGIC OPERAND
Enabled=1
I_1
Disabled=0
50DD SV
I_2
I_0
ABS (I_1-I_1')>0.04 pu
(I_1' is 4 cycles old)
I_0 > 0.12 to 0.24 pu
I_2 > 0.12 to 0.24 pu
ABS (I_2-I_2')>0.04 pu
(I_2' is 4 cycles old)
ABS (I_0-I_0')>0.04 pu
(I_0' is 4 cycles old)
NOTE:
ADJUSTMENTS ARE
MADE ONCE EVERY
8 CYCLES TO THE
NEXT LEVEL (HIGHER
OR LOWER) IN 0.02 pu
STEPS USING THE
HIGHEST VALUE OF
I_0 AND I_2.
AND
AND
OR
OR
OR
OR
AND
Summary of Contents for L30
Page 10: ...x L30 Line Current Differential System GE Multilin TABLE OF CONTENTS ...
Page 30: ...1 20 L30 Line Current Differential System GE Multilin 1 5 USING THE RELAY 1 GETTING STARTED 1 ...
Page 370: ...5 244 L30 Line Current Differential System GE Multilin 5 10 TESTING 5 SETTINGS 5 ...
Page 464: ...A 10 L30 Line Current Differential System GE Multilin A 1 PARAMETER LISTS APPENDIX A A ...
Page 600: ...C 30 L30 Line Current Differential System GE Multilin C 7 LOGICAL NODES APPENDIX C C ...
Page 610: ...D 10 L30 Line Current Differential System GE Multilin D 1 IEC 60870 5 104 APPENDIX D D ...
Page 622: ...E 12 L30 Line Current Differential System GE Multilin E 2 DNP POINT LISTS APPENDIX E E ...
Page 634: ...F 12 L30 Line Current Differential System GE Multilin F 3 WARRANTY APPENDIX F F ...
Page 644: ...x L30 Line Current Differential System GE Multilin INDEX ...