GE D90 Plus Instruction Manual page 463

CHAPTER 8: AUTOMATION
PLUS
D90 LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL
Dead Source Select
Range: None, LV1 and DV2, DV1 and LV2, DV1 or DV2, DV1 Xor DV2, DV1 and DV2
Default: LV1 and DV2
This setting selects the combination of dead and live sources that bypass the
synchronism check function and permit the breaker to be closed when one or both of
the two voltages (V and V
1
source is declared by monitoring the voltage level. The following six options are
available:
– "None" — The dead source function is disabled
– "LV1 and DV2" — Live V
– "DV1 and LV2" — Dead V
– "DV1 or DV2" — Dead V
– "DV1 Xor DV2" — Dead V
is live)
– "DV1 and DV2" — Dead V
Dead V1 Maximum Voltage
Range: 0.00 to 1.25 pu in steps of 0.01
Default: 0.30 pu
This setting specifies a maximum voltage magnitude for V
less than this magnitude, the V
considered dead or de-energized.
Dead V2 Maximum Voltage
Range: 0.00 to 1.25 pu in steps of 0.01
Default: 0.30 pu
This setting specifies a maximum voltage magnitude for V
less than this magnitude, the V
considered dead or de-energized.
Live V1 Minimum Voltage
Range: 0.00 to 1.25 pu in steps of 0.01
Default: 0.70 pu
This setting specifies a minimum voltage magnitude for V
greater than this magnitude, the V
considered live or energized.
Live V2 Minimum Voltage
Range: 0.00 to 1.25 pu in steps of 0.01
Default: 0.70 pu
This setting specifies a minimum voltage magnitude for V
greater than this magnitude, the V
considered live or energized.
Events
Range: Enabled, Disabled
Default: Enabled
This setting enables and disables the logging of synchrocheck events in the sequence of
events recorder.
The figures show the logic for the synchrocheck element.
) are below the maximum voltage threshold. A dead or live
2
and dead V
1 2
and live V
1 2
or dead V
1 2
exclusive-or dead V
1 2
and dead V
1 2
voltage input that is used for synchrocheck is
1
voltage input that is used for synchrocheck is
2
voltage input that is used for synchrocheck is
1
voltage input that is used for synchrocheck is
2
AUTOMATION CONTROL
(one source is dead and the other
in per-unit values. At values
1
in per-unit values. At values
2
in per-unit values. At values
1
in per-unit values. At values
2
453