GE B30 UR Series Instruction Manual page 244

5.6 GROUPED ELEMENTS

PATH: SETTINGS GROUPED ELEMENTS
 BUS ZONE 1
 DIFFERENTIAL
5
Two zones of bus differential protection are provided. The operation of these elements is completely dependent on the
dynamic bus replica, which must be defined first. Both biased and unbiased bus differential protection functions are pro-
vided for the 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).
5-122
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SETTING GROUP 1(6)
BUS ZONE 1 DIFF
FUNCTION: Disabled
BUS ZONE 1 DIFF
MESSAGE
PICKUP: 0.100 pu
BUS ZONE 1 DIFF
MESSAGE
LOW SLOPE: 25%
BUS ZONE 1 DIFF
MESSAGE
LOW BPNT: 2.00 pu
BUS ZONE 1 DIFF
MESSAGE
HIGH SLOPE: 60%
BUS ZONE 1 DIFF
MESSAGE
HIGH BPNT: 8.00 pu
BUS ZONE 1 DIFF
MESSAGE
HIGH SET: 15.00 pu
BUS ZONE 1 DIFF
MESSAGE
SEAL-IN: 0.400 s
BUS ZONE 1 DIFF BLK:
MESSAGE
Off
BUS ZONE 1 DIFF
MESSAGE
TARGET: Latched
BUS ZONE 1 DIFF
MESSAGE
EVENTS: Disabled
B30 Bus Differential System
 
BUS DIFFERENTIAL BUS ZONE 1(2) DIFFERENTIAL
Range: Disabled, Enabled
Range: 0.050 to 6.000 pu in steps of 0.001
Range: 15 to 100% in steps of 1
Range: 1.00 to 30.00 pu in steps of 0.01
Range: 50 to 100% in steps of 1
Range: 1.00 to 30.00 pu in steps of 0.01
Range: 0.10 to 99.99 pu in steps of 0.01
Range: 0.000 to 65.535 s in steps of 0.001
Range: FlexLogic operand
Range: Self-reset, Latched, Disabled
Range: Disabled, Enabled
5 SETTINGS
5.6.3 BUS DIFFERENTIAL
GE Multilin