ABB Relion REQ650, Applications Manual

Page: 229 / 340

is often a combination of signals from external IEDs via the IO and internal functions.
An OR gate is then used for the combination.
CBPOS and CBREADY
These should be connected to binary inputs to pick-up information from the CB. The
CBPOS 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.
SYNC
This is connected to the internal synchrocheck 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 Auto-Reclosing function for example, when certain special service
conditions arise. Input is normally set to FALSE. When used, blocking must be reset
with BLOCKOFF.
1MRK 505 291-UEN A
Section 10
Control
223
Application manual