ABB RELION REB500 Technical Manual page 125

1MRK 505 406-UEN B
Signal
ReleaseInp1
ReleaseInp2
BlkSynchBus1
BlkSynchBus2
BlkSynchLine
2)
OverridSync
OpModeInp1
OpModeInp2
3)
PermitToClose
Start
SyncBlockd
TrigBlockd
SyncOverrid
AmplDifOK
PhaseDifOK
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Bay protection functions REB500
Technical manual
Description
Binary inputs for enabling the synchrocheck function
(internal OR gate, that is, at least one of the inputs has to be
set to TRUE (T) or controlled by a binary input to enable the
output). If both inputs are FALSE (F), the function does not
run, that is, the supervision algorithm is not processed.
These inputs are used where the synchrocheck function is
only needed at certain times (for example, in autoreclosure
schemes).
• F: synchrocheck function disabled
• T: synchrocheck function enabled
• xx: all binary inputs (or outputs of protection functions)
Binary inputs for interlocking the enabling signals at the
output of the synchrocheck function.
These would be typically controlled by fuse failure equipment
(MCBs) monitoring the VT circuits.
• F: blocking input disabled
• T: blocking input continuously enabled
• xx: all binary inputs (or outputs of protection functions)
Binary input for bypassing the synchrocheck function.This
permits an enabling signal (PermitToClose) regardless of
whether the synchronism conditions are fulfilled or not. It
overrides the function's blocking and other enabling inputs.
• F: input not used
• T: SC enabling output (PermitToClose) continuously
active
• xx: all binary inputs (or outputs of protection functions)
Binary inputs for remotely selecting the operating mode:
• F: input disabled
• T: input continuously enabled
• xx: all binary inputs (or outputs of protection functions)
Signal indicating that the synchrocheck function is enabling
closure of the circuit-breaker.
It is generated at the end of the measuring period
( supervisTime ) and remains active for as long as the
synchronism conditions are fulfilled, or until a blocking signal
is received, or the synchrocheck function resets.
Signal generated at the instant the conditions for
synchronism are fulfilled for the first time.
Signal indicating that the synchrocheck function is disabled,
that is, both the inputs
set to FALSE (F), and that the synchrocheck algorithm has
been discontinued.
The CB close enabling inputs are blocked (one or more
blocking I/Ps are at logical 1), but the synchrocheck
algorithm continues to run.
Signal indicating that the synchrocheck function is bypassed
and a CB close enabling signal is being generated
(PermitToClose) regardless of whether the synchronism
conditions are fulfilled or not.
Signal indicating that the voltage difference |dU| between
the phases used for checking synchronism has fallen below
the value of the parameter
Signal indicating that the phase-shift |dPh| between the
phases used for checking synchronism has fallen below the
value of the setting of
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Bay protection functions
synchEnable1 and synchEnable2 are
maxVoltDif .
maxPhaseDif .
Section 5
119