ABB REL670 Installation And Commissioning Manual page 154

146
Control
Checking the influence of synchronism check (at three-phase reclosing)
Procedure
1. Check that the auto-reclosing function is operative, e.g. by making a
three-phase reclosing shot with the synchronism check condition.
Remove the SYNC signal.
2. Apply a fault causing three-phase trip and thereby a START and a
TR3P signal.
3. Wait for the tSync time out limit.
Check that no reclosing is made.
Checking the response when auto-reclosing is Off
Procedure
1. Check that the auto-reclosing function is operative, e.g. by making a
reclosing shot.
Set the auto-reclosing Operation Off, e.g. by external control.
The output READY shall be low, and PREP3P shall be high.
2. Apply a fault and thereby a START signal.
3. Check that no reclosing takes place.
Testing auto-reclosing in a multi-breaker arrangement
The usual arrangement is to have an auto-reclosing function per circuit-breaker. They can be in
different CB related units (IEDs) or in a common unit. One auto-reclosing function (Master) is
set with Priority=High and the other (Slave) with Priority=Low. An illustration of typical inter-
connections is shown in the Application manual, section Autorecloser/Setting guidelines. The
two functions can be checked individually by carefully applying START, WAIT, and INHIBIT
signals.
It is also possible to verify the two functions together by using CB simulating equipment and
two CB circuits. There should be interconnections from the Master to the Slave function; WF-
MASTER - WAIT, and UNSUCCL - INHIBIT, as shown in the picture referred to above.
Completing the test
After the tests, restore the equipment to normal or desired state. Check the following items in
particular:
Procedure
1. Check the operation counters.
Reset the counters to zero, if that is the user's preference. The counter re-
set function is found in the HMI under:
Chapter 11
Verifying settings by secondary
injection