Bus - GE B30 Instruction Manual

5 SETTINGS

PATH: SETTINGS SYSTEM SETUP
 BUS ZONE 1

MESSAGE
MESSAGE
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MESSAGE
Two bus differential zones can be configured. The zone is associated with its own bus differential protection element and
CT trouble monitoring element.
The bus differential zone is defined by providing the names of sources whose currents bound the differential zone (refer to
settings
BUS ZONE 1A SOURCE
The connection status of a circuit with respect to the protected bus is dynamically provided by FlexLogic™ operands (
to
ZONE 1A STATUS BUS ZONE 1F STATUS
to the bus. The operands are to be formed from the contact inputs that reflect positions of switches and/or breakers. If con-
tact discrepancy filtering is needed, it should be accomplished using FlexLogic™ when forming the final status operands.
The status signal is meant to exclude a given current from the bus zone if the circuit is connected to a different bus section
and its non-zero values would upset the current balance causing a spurious differential signal. Therefore, it is not required
nor recommended to use the position of the breaker to control the status signal of a given circuit. If the breaker is opened,
the circuit may remain included in the bus differential zone as the zero current values are measured and used when calcu-
lating the differential signal. Dynamically excluding or including a given current during the breaker operation can cause
undesirable transients and race conditions for the relay algorithm.
If a given circuit cannot be connected to any other bus section different than the protected one, the FlexLogic™ constant
"On" is recommended for the status signal.
GE Multilin
 

BUS

BUS ZONE 1(2)
BUS ZONE 1A SOURCE:
SRC 1
BUS ZONE 1B SOURCE:
SRC 1
BUS ZONE 1C SOURCE:
SRC 1
BUS ZONE 1D SOURCE:
SRC 1
BUS ZONE 1E SOURCE:
SRC 1
BUS ZONE 1F SOURCE:
SRC 1
BUS ZONE 1A STATUS:
Off
BUS ZONE 1B STATUS:
Off
BUS ZONE 1C STATUS:
Off
BUS ZONE 1D STATUS:
Off
BUS ZONE 1E STATUS:
Off
BUS ZONE 1F STATUS:
Off
to ).
BUS ZONE 1F SOURCE
settings). A given operand should be "On" if the corresponding circuit is connected
B30 Bus Differential System
5.4 SYSTEM SETUP
Range: SRC 1, SRC 2, SRC 3, SRC 4, SRC 5, SRC 6
Range: SRC 1, SRC 2, SRC 3, SRC 4, SRC 5, SRC 6
Range: SRC 1, SRC 2, SRC 3, SRC 4, SRC 5, SRC 6
Range: SRC 1, SRC 2, SRC 3, SRC 4, SRC 5, SRC 6
Range: SRC 1, SRC 2, SRC 3, SRC 4, SRC 5, SRC 6
Range: SRC 1, SRC 2, SRC 3, SRC 4, SRC 5, SRC 6
Range: FlexLogic™ operand
Range: FlexLogic™ operand
Range: FlexLogic™ operand
Range: FlexLogic™ operand
Range: FlexLogic™ operand
Range: FlexLogic™ operand
5.4.7 BUS
5
BUS
5-83