Checking The Reclosing Conditions; Checking The Influence Of The Inhibit Signal; Check Closing Onto A Fault; Checking The Influence Of Cb Not Ready For Reclosing - ABB REQ650 Commissioning Manual
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Also See for REQ650:
- Applications manual (340 pages) ,
- Commissioning manual (148 pages) ,
- Product manual (96 pages)
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Section 6
Testing functionality
6.7.3.4
6.7.3.5
6.7.3.6
6.7.3.7
110
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 (or
SYNC at three-phase reclosing).
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 the
auto-reclosing function for the set Reset time.
Before a new reclosing sequence can be run, the CBREADY and 52A (CB closed)
must be set manually.
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 auto-reclosing function is operative, for example, by making a
reclosing shot without the INHIBIT signal.
2.
Apply a fault and thereby a PICKUP 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
1.
Check that the closing function 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 apply immediately a fault and thereby an INITIATE signal.
4.
Check that no reclosing takes place.
Checking the influence of CB not ready for reclosing
1.
Check that the auto-reclosing function is operative, for example by making a
reclosing shot.
1MRK 505 293-UUS A
Commissioning manual
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