ABB Relion 670 Series Applications Manual page 287

1MRK 511 358-UUS A
RI_HS, Initiate High-speed auto-reclosing
It may be used when one wants to use two different dead times in different protection trip
operations. This input starts the dead time
input is without a synchronization check.
INHIBIT
To this input shall be connected signals that interrupt a reclosing cycle or prevent a start from
being accepted. Such signals can come from protection for a line connected shunt reactor, from
transfer trip receive, from back-up protection functions, busbar protection trip or from breaker
failure protection. When the CB open position is set to start SMBRREC(79) , then manual opening
must also be connected here. The inhibit is often a combination of signals from external IEDs via
the IO and internal functions. An OR gate is then used for the combination.
52a and CBREADY
These should be connected to binary inputs to pick-up information from the CB. The 52a input is
interpreted as CB Closed, if parameter
setting. At three operating gears in the breaker (single pole operated breakers) the connection
should be "All poles closed" (series connection of the NO contacts) or "At least one pole open"
(parallel connection of NC contacts) if the
a signal meaning that the CB is ready for a reclosing operation, either Close-Open (CO), or Open-
Close-Open (OCO). If the available signal is of type "CB not charged" or "not ready", an inverter can
be inserted in front of the CBREADY input.
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 (Note! Not the HS step).
PLCLOST
This is intended for line protection permissive signal channel lost (fail) for example, PLC= Power
Line Carrier fail. It can be connected, when required to prolong the AutoReclosing time when
communication is not working, that is, one line end might trip with a zone 2 delay. If this is used
the autorecloser must also be started from Zone2 time delayed trip.
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.
THOLHOLD
Signal "Thermal overload protection holding back Auto-Reclosing". It can be connected to a
thermal overload protection trip signal which resets only when the thermal content has fallen 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
Application manual
StartByCBOpen is used, the CB Open condition shall also be connected to the
If
input RI.
t1 3PhHS . High-speed reclosing shot 1 started by this
CBAuxContType is set NormOpen , which is the default
CBAuxContType is set to NormClosed . The "CB Ready" is
Section 13
Control
281