Should the operation not be as expected, this should be investigated. It could
be caused by an inappropriate setting or missing condition such as
CBREADY
.
6.
Repeat the sequence by simulating a permanent fault.
Shortly after the reclosing shot, a new fault is applied. If a single-shot auto
reclosing program is selected, there shall be one reclosing operation and then
blocking of the auto recloser for the set reclaim time.
Before a new reclosing sequence can be run, the
CBREADY
and
CBCLOSED
must be set manually.
7.
Repeat the sequence by simulating a three-phase transient and permanent
faults, and other applicable cases, such as signal to
STARTHS
and high-speed
reclosing.
If just single-phase reclosing is selected,
ARMode
=
1ph
, a check can be run
to make sure that a three-phase trip does not result in any auto reclosing.
Other similar cases can be checked as required.
9.8.2.4
Checking the auto reclosing conditions
M12400-123 v5
When checking the influence of a releasing condition it is suggested to first run an
auto reclosing sequence with the condition fulfilled. When the condition signal is
removed, and a new sequence is run, it indicates that the result was due to the
changed condition. In case of a blocking signal the procedure should be similar.
Start without the blocking or inhibit signal, and then run a sequence with the
blocking or inhibit signal added.
Checking the influence of the INHIBIT signal
M12400-129 v5
1.
Check that the auto recloser is operative, for example, by making a reclosing
shot without the
INHIBIT
signal.
2.
Apply a fault and thereby a
START
signal. At the same time, or during the
dead time, apply a signal to the input
INHIBIT
.
3.
Check that the auto reclosing sequence is interrupted and no auto reclosing
takes place.
Check closing onto a fault
M12400-137 v5
1.
Check that the auto recloser is operative, for example by making a reclosing
shot.
Keep the
CBREADY
signal high.
2.
Set the breaker simulating relay BR in Open position.
3.
Close the BR relay and immediately apply a fault and thereby a START
signal.
4.
Check that no auto reclosing takes place.
Checking the influence of circuit breaker not ready for reclosing
M12400-149 v5
1MRK 506 383-UEN A
Section 9
Testing functionality by secondary injection
Line distance protection REL650 2.2 IEC
145
Commissioning manual
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