GE 845 Instruction Manual page 439

CHAPTER 4: SETPOINTS
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845 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL
BYPASS REM BLK CLOSE
Range: Off, Any FlexLogic operand
Default: Off
This setting specifies selection of an input which when asserted bypasses the asserted
remote block close signal. Close command is permitted for the breaker.
CLOSE SYNC SPVN BKR
Range: Bypass, Sync 1 Cls Perm
Default: order code dependant (e.g. Bypass or Sync 1Cls Perm)
This setpoint selects whether or not the closing of the breaker is supervised by the
synchrocheck function. For this purpose the Synchrocheck element must be enabled.
If the supervision is not bypassed and Close is applied for 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 shall not be disabled.
The 845 relay has one three-phase voltage inputs, a single auxiliary voltage input, and one
Synchrocheck element. It is strongly recommended to connect the relay voltage inputs to
three-phase VTs and an Aux VT installed across a breaker on the same side of the
transformer winding. With this condition in place, select the Synchrocheck Close
Permission only for that breaker. Do not select the Synchrocheck Close Permission for the
breakers on the other transformer windings.
EVENTS
Range: Disabled, Enabled
Default: Enabled
TARGETS
Range: Disabled, Self-reset, Latched
Default: Self-reset
CONTROL
4–311