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Section 10
Testing functionality by secondary injection
Possibly reset the counters to Zero. Counters are reset in the reset menu.
4.
Make arrangements for the simulation of the CB, for example as in Figure 33.
5.
Make arrangements for indication, recording and time measurements.
The signals for CBCLOSED, START, CLOSECB, READY and other relevant signals should
preferably be arranged for event recording with time tagging. If that is not possible, other
means of time measurement and recording should be arranged.
10.9.2.2
Switching the auto recloser to On and Off
1.
Set the Operation setting to Off and check the state.
2.
Set the Operation setting to On and check the state, including SETON and READY.
The circuit breaker should be closed and ready.
3.
If external control inputs OFF/ON are used, check that they work. Set ExternalCtrl = On and
use the control inputs to switch On and Off, and check the state of the function.
10.9.2.3
Verifying the auto recloser
Select the test cases to be run according to what is applicable to the particular application. It can be,
for example,
•
single-shot reclosing
•
two-shot reclosing
Below, a case with single-shot reclosing is described.
1.
Set Operation = On.
2.
If the synchrocheck 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 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 auto reclosing 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(79,5(0–>)):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. 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 transient and permanent faults, and other applicable cases,
such as signal to STARTHS and high-speed auto reclosing.
10.9.2.4
Checking the auto reclosing conditions
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.
128
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1MRK 506 377-UEN Rev. L
M12400-79 v9
M12400-91 v12
M12400-123 v5
Railway application RER670
Commissioning manual
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