GE Multilin 850 Instruction Manual page 336

PROTECTION
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RESTORE DELAY
Range: 0.00 to 6000.00 s in steps of 0.01
Default: 2.00 s
This value sets the delay time between the voltage restoration and the re-closing of the
generating unit CB. This timer starts when inputs (programmed as Restore Initiate and/or
27Q Initiate) drop to zero. If the re-closing delay time has run down and all other
conditions for re-closing (see logic diagram) are fulfilled, then the Restore function
releases the command to close the CB.
If the restoration input is activated, the UV Reactive Power Restore function will remain
blocked or become reset.
SYNC SUPERVISION
Range: Off, On
Default: Off
This setpoint enables synchrocheck supervision. The operation of the UV Reactive Power
Restore function can be supervised by the Synchrocheck function (Path:
Control > Synchrocheck 1
accordingly. For applications where Synchrocheck and/or dead source check is not
needed, Sycn Supervision can be bypassed by setting it to Off.
If the Sync Supervision is On and the UV Reactive Power Restore function is applied in an
application where the breaker is located on radial feeders, or the line is powered by one
source only, the Dead Source Perm setpoint from the Synchrocheck menu must not be
disabled.
If the Synchrocheck function is not selected in the order code, this setting is hidden and
defaulted to Off.
BLOCK
Range: Off, Any FlexLogic operand
Default: Off
The re-closing can be blocked, when the selected operand is asserted.
OUTPUT RELAY X
For details see Common
EVENTS
Range: Disabled, Enabled
Default: Enabled
The selection of the Enabled setting enables the events of the function.
TARGETS
Range: Disabled, Self-Reset, Latched
Default: Self-Reset
). The Synchrocheck function must be enabled and set
Setpoints.
850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 4: SETPOINTS
Setpoints >