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B30 BUS DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL
GROUPED ELEMENTS
CHAPTER 5: SETTINGS
5
Each of the six setting group menus is identical. Setting group 1 (the default active group) is active automatically when no
other group is active.
If the device incorrectly switches to group 1 after power cycling, upgrade the firmware to version 7.31 or later to correct
this issue.
5.7.3 Bus differential
SETTINGS
GROUPED ELEMENTS
SETTING GROUP 1(6)
BUS DIFFERENTIAL
BUS ZONE 1(2) DIFFERENTIAL
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
provided 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 (see the logic diagram in this section).
GROUND CURRENT
BREAKER FAILURE
VOLTAGE ELEMENTS
BUS ZONE 1
DIFFERENTIAL
BUS ZONE 1 DIF
FUNCTION: Disabled
Range: Disabled, Enabled
BUS ZONE 1 DIF
PICKUP: 0.100 pu
Range: 0.050 to 6.000 pu in steps of 0.001
BUS ZONE 1 DIF
LOW SLOPE: 25%
Range: 15 to 100% in steps of 1
BUS ZONE 1 DIF
LOW BPNT: 2.00 pu
Range: 1.00 to 30.00 pu in steps of 0.01
BUS ZONE 1 DIF
HIGH SLOPE: 60%
Range: 50 to 100% in steps of 1
BUS ZONE 1 DIF
HIGH BPNT: 8.00 pu
Range: 1.00 to 30.00 pu in steps of 0.01
BUS ZONE 1 DIF
HIGH SET: 15.00 pu
Range: 0.10 to 99.99 pu in steps of 0.01
BUS ZONE 1 DIF
SEAL-IN: 0.400 s
Range: 0.000 to 65.535 s in steps of 0.001
BUS ZONE 1 DIF BLK:
Off
Range: FlexLogic operand
BUS ZONE 1 DIF
TARGET: Latched
Range: Self-reset, Latched, Disabled
BUS ZONE 1 DIF
EVENTS: Disabled
Range: Disabled, Enabled
Summary of Contents for b30
Page 10: ...x B30 BUS DIFFERENTIAL SYSTEM INSTRUCTION MANUAL TABLE OF CONTENTS ...
Page 486: ...5 278 B30 BUS DIFFERENTIAL SYSTEM INSTRUCTION MANUAL TESTING CHAPTER 5 SETTINGS 5 ...
Page 616: ...iv B30 BUS DIFFERENTIAL SYSTEM INSTRUCTION MANUAL ABBREVIATIONS ...
Page 632: ...xvi B30 BUS DIFFERENTIAL SYSTEM INSTRUCTION MANUAL INDEX ...