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B90 Low Impedance Bus Differential System
GE Multilin
5.5 GROUPED ELEMENTS
5 SETTINGS
5
5.5.3 BUS DIFFERENTIAL
PATH: SETTINGS
GROUPED ELEMENTS
SETTING GROUP 1(6)
BUS DIFFERENTIAL
BUS ZONE 1)(4) DIFFERENTIAL
Up to four zones of bus differential protection are provided, depending on the software options. The operation of these ele-
ments is completely dependent on the dynamic bus replica, which must be defined first. Both restrained (biased) and unre-
strained (unbiased, instantaneous) bus differential protection functions are provided for each bus differential zone.
The biased bus differential function has a dual-slope operating characteristic (see figure below) operating in conjunction
with saturation detection and a directional comparison principle (refer to the
Bus zone 1 differential scheme logic
figure in
this section).
BUS ZONE 1
DIFFERENTIAL
BUS ZONE 1 DIFF
FUNCTION: Disabled
Range: Disabled, Enabled
MESSAGE
BUS ZONE 1 DIFF
PICKUP: 0.100 pu
Range: 0.050 to 2.000 pu in steps of 0.001
MESSAGE
BUS ZONE 1 DIFF
LOW SLOPE: 25%
Range: 15 to 100% in steps of 1
MESSAGE
BUS ZONE 1 DIFF
LOW BPNT: 2.00 pu
Range: 1.00 to 30.00 pu in steps of 0.01
MESSAGE
BUS ZONE 1 DIFF
HIGH SLOPE: 60%
Range: 50 to 100% in steps of 1
MESSAGE
BUS ZONE 1 DIFF
HIGH BPNT: 8.00 pu
Range: 1.00 to 30.00 pu in steps of 0.01
MESSAGE
BUS ZONE 1 DIFF
HIGH SET: 15.00 pu
Range: 0.10 to 99.99 pu in steps of 0.01
MESSAGE
BUS ZONE 1 DIFF
SEAL-IN: 0.400 s
Range: 0.000 to 65.535 s in steps of 0.001
MESSAGE
BUS ZONE 1 DIFF SUPV:
On
Range: FlexLogic operand
MESSAGE
BUS ZONE 1 DIFF TRIP:
Off
Range: FlexLogic operand
MESSAGE
BUS ZONE 1 DIFF BLK:
Off
Range: FlexLogic operand
MESSAGE
BUS ZONE 1 DIFF
TARGET: Latched
Range: Self-reset, Latched, Disabled
MESSAGE
BUS ZONE 1 DIFF
EVENTS: Disabled
Range: Disabled, Enabled
Summary of Contents for B90 UR Series
Page 316: ...A 4 B90 Low Impedance Bus Differential System GE Multilin A 1 PARAMETER LISTS APPENDIX A A ...
Page 406: ...B 90 B90 Low Impedance Bus Differential System GE Multilin B 4 MEMORY MAPPING APPENDIX B B ...
Page 436: ...C 30 B90 Low Impedance Bus Differential System GE Multilin C 7 LOGICAL NODES APPENDIX C C ...
Page 446: ...D 10 B90 Low Impedance Bus Differential System GE Multilin D 1 IEC 60870 5 104 APPENDIX D D ...