Checking The Reclosing Conditions - ABB rec670 Commissioning Manual

1MRK 511 360-UEN A
10.9.2.4
Bay control REC670 2.1 IEC
Commissioning manual
Testing functionality by secondary injection
1. Set Operation = On.
2. If the synchronizing check SESRSYN is not to be operated, ensure that the signal
SYNC input is activated. If SESRSYN is to be included, ensure that it is supplied
with the appropriate AC quantities.
3. Simulate CB closed position by closing switch SC to make the BR relay start.
4. Simulate CBREADY by closing the switch SRY, and leave it closed.
5. Inject AC quantities to give a trip, for example, a one-phase trip, to the BR and
to the START input.
Observe and preferably record the operation. The BR relay shall trip and reclose
(start). After reclosing, the SRY switch can be opened for about 5s and then
closed again.
The autoreclosing open time and the sequence should be checked, for example
in the event recording. Check also the operation indications (disturbance report)
and the operation counters on the local HMI under Main menu/Test/Function
status/Control/AutoRecloser79,5(0–>1)/SMBRREC:x
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 reclosing
program is selected, there shall be one reclosing operation and then blocking of
SMBRREC for the set Reclaim time.
Before a new reclosing sequence can be run, the CBREADY and CBPOS (CB
closed) 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, FirstShot = 1ph, a check can be run to
make sure that a three-phase trip does not result in any reclosing. Other similar
cases can be checked as required.

Checking the reclosing conditions

When checking the influence of a releasing condition it is suggested to first run a
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
1. Check that the autorecloser function SMBRREC 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 open
time, apply a signal to the input INHIBIT.
3. Check that the reclosing sequence is interrupted and no reclosing takes place.
Check closing onto a fault
Section 10
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