ABB REC650 Applications Manual page 213

1MRK 511 286-UUS A
Application manual
SYNC
This is connected to the internal synchronism check function when required. It can also be
connected to a binary input for synchronization from an external device. If neither internal
nor external synchronism or energizing check is required, it can be connected to a
permanently high source, TRUE. The signal is required for three phase shots 1-5 to
proceed .
TRSOTF
This is the signal "Trip by Switch Onto Fault". It is usually connected to the "switch onto
fault" output of line protection if multi-shot Auto-Reclose attempts are used. The input
will start the shots 2-5. For single shot applications the input is set to FALSE.
THOLHOLD
Signal "Thermal overload protection holding back Auto-Reclosing". It is normally set to
FALSE. It can be connected to a thermal overload protection trip signal which resets only
when the thermal content has gone down to an acceptable level, for example, 70%. As long
as the signal is high, indicating that the line is hot, the Auto-Reclosing is held back. When
the signal resets, a reclosing cycle will continue. Please observe that this have a
considerable delay. Input can also be used for other purposes if for some reason the Auto-
Reclose shot is halted.
WAIT
Used to hold back reclosing of the "low priority unit" during sequential reclosing. See
"Recommendation for multi-breaker arrangement" below. The signal is activated from
output WFMASTER on the second breaker Auto-Recloser in multi-breaker
arrangements.
BLKON
Used to block the autorecloser for 3-phase operation (SMBRREC ,79) function for
example, when certain special service conditions arise. Input is normally set to FALSE.
When used, blocking must be reset with BLOCKOFF.
BLOCKOFF
Used to Unblock SMBRREC (79) function when it has gone to Block due to activating
input BLKON or by an unsuccessful Auto-Reclose attempt if the settingBlockByUnsucCl
is set to Enabled. Input is normally set to FALSE.
RESET
Used to Reset SMBRREC (79) to start condition. Possible Thermal overload Hold will be
reset. Positions, setting On-Off. will be started and checked with set times. Input is
normally set to FALSE.
Section 10
Control
207