ABB REB670 Applications Manual page 320

Section 12
Control
314
Recommendations for input signals
Please see figure 118, figure
examples.
ON and OFF
These inputs can be connected to binary inputs or to a communication interface block for
external control.
RI
It should be connected to the trip output protection function, which starts the autorecloser
for 1/2/3-phase operation (SMBRREC ,79) function. It can also be connected to a binary
input for start from an external contact. A logical OR-gate can be used to combine the
number of start sources.
If StartByCBOpen is used, the CB Open condition shall also be connected
to the input RI.
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 t1 3PhHS. High-speed reclosing shot 1 started
by this 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 CBAuxContType is set NormOpen, which
is the default 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
CBAuxContType is set to NormClosed. The "CB Ready" is 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.
119 and figure 120 and default factory configuration for
1MRK 505 337-UUS -
Application manual