Name
Values (Range)
Unit
Step
Default
Description
CBReadyType
CO
OCO
-
-
CO
Select type of circuit breaker ready signal
CO/OCO
t2 3Ph
0.00 - 6000.00
s
0.01
30.00
Open time for shot 2, three-phase
t3 3Ph
0.00 - 6000.00
s
0.01
30.00
Open time for shot 3, three-phase
t4 3Ph
0.00 - 6000.00
s
0.01
30.00
Open time for shot 4, three-phase
t5 3Ph
0.00 - 6000.00
s
0.01
30.00
Open time for shot 5, three-phase
tInhibit
0.000 - 60.000
s
0.001
5.000
Inhibit reclosing reset time
Follow CB
Disabled
Enabled
-
-
Disabled
Advance to next shot if CB has been closed
during dead time
AutoCont
Disabled
Enabled
-
-
Disabled
Continue with next reclosing-shot if breaker did
not close
tAutoContWait
0.000 - 60.000
s
0.001
2.000
Wait time after close command before
proceeding to next shot
UnsucClByCBChk
NoCBCheck
CB check
-
-
NoCBCheck
Unsuccessful closing signal obtained by
checking CB position
BlockByUnsucCl
Disabled
Enabled
-
-
Disabled
Block AR at unsuccessful reclosing
ZoneSeqCoord
Disabled
Enabled
-
-
Disabled
Coordination of down stream devices to local
protection unit’s AR
11.2.6
Operation principle
11.2.6.1
Auto-reclosing operation
Disabled and Enabled
Operation of the automatic reclosing can be set to Off or On via the setting parameters and
through external control. With the setting
Operation
=
Enabled
, the function is activated
while with the setting
Operation
=
Disabled
the function is deactivated. With the setting
Operation
=
External ctrl
, the activation/deactivation is made by input signal pulses, for
example, from a control system.
When the function is set
Enabled
and is operative the output SETON is activated (high).
Other input conditions such as 52a and CBREADY must also be fulfilled. At this point the
automatic recloser is prepared to start the reclosing cycle and the output signal READY
on the STBRREC (79) function block is activated (high).
11.2.6.2
Initiate auto-reclosing and conditions for initiation of a reclosing cycle
The usual way in which to initiate a reclosing cycle, or sequence, is to initiate it when a line
protection tripping has occurred, by applying a signal to the RI input.
For a new auto-reclosing cycle to be started, a number of conditions need to be met. They
are linked to dedicated inputs. The inputs are:
1MRK 506 335-UUS A
Section 11
Control
367
Technical manual
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