ABB RED650, Technical Manual

Page: 340 / 926

open (NO) shall be connected to the CBCLOSED and START inputs. Then the
circuit breaker status change from closed to open will generate an auto reclosing
start pulse of limited length (100ms) subject to the usual auto recloser checks. The
auto reclosing sequence continues then as usual. Signals from manual tripping and
other functions, which shall prevent auto reclosing, need to be connected to the
INHIBIT input. The logic for start from circuit breaker open position is shown in
Figure 152 .
The function can also be set to proceed to the next reclosing shot (if selected) even
if the external start signal is not received but the breaker is still not closed. The user
can set a required time delay for the auto recloser to proceed without a new start
with setting
tAutoContWait . Also the synchrocheck conditions not fulfilled will
also make the auto recloser to proceed to next shot. This automatic proceeding of
shots is controlled by setting
AutoContinue and is shown in figure 155 .
IEC16000156-1-en.vsdx
t
tAutoContWait
AND
commandCloseCB
S
R
AND
AND
OR
cbClosed
OR
synchroCheckOK
AutoContinue
AND
autoInitiate
IEC16000156 V1 EN-US
Figure 155: Automatic proceeding of shots
Blocking, resetting and inhibiting auto reclosing
GUID-82719FE0-02E4-48FB-9685-2146480F3653 v1
The BLKON input is used to block the auto recloser for example, when certain
special service conditions arise. The auto recloser can also be blocked by an
unsuccessful reclosing attempt. This is controlled by the setting
BlockByUnsucCl .
When the auto recloser is blocked it immediately resets to its initial conditions and
the
ACTIVE output is unactivated. The BLOCKED output indicates that the auto
recloser is blocked. To unblock the auto recloser the BLKOFF input must be
activated.
The RESET input is used to reset the auto recloser to its initial conditions. When
initial starting conditions are fulfilled again, after a reset, the auto recloser is ready
for a new reclosing sequence.
If the INHIBIT input is activated it is reported on the INHIBOUT output. To ensure
reliable interruption and temporary blocking of the auto recloser a reset time delay
tInhibit is used. The auto recloser will be blocked the time set in tInhibit after the
deactivation of the INHIBIT input. The following internal inhibit signals are also
affected by the setting tInhibit :
Section 12
1MRK 505 394-UEN A
Control
334 Line differential protection RED650 2.2 IEC
Technical manual