Checking the influence of synchronizing check (at three-pole reclosing)
1.
Check that the autorecloser for 3-phase operation function SMBRREC (79) is
operative, for example, by making a three-pole reclosing shot with the
synchronizing check condition.
Remove the SMBRREC (25) signal.
2.
Apply a fault causing three-phase trip and thereby a RI signal.
3.
Wait for the
tSync
time out limit.
Check that no reclosing is made.
Restoring equipment
After the tests, restore the equipment to normal or desired state. Check the following items
in particular:
1.
Check the operation counters.
Reset the counters to zero, if that is the user's preference. The counter reset function
is found on the local HMI under
Main menu/Clear/Clear counters/
SMBRREC(79,0->1)
2.
Restore settings that may have been modified for the tests back to normal.
3.
Disconnect the test switch, CB simulating arrangement and test circuits.
Reconnect any links or connection terminals, which may have been opened for the
tests.
4.
Reset indications, alarms and disturbance recordings.
Clearing of the disturbance report must be done via the Disturbance Handling in
PCM600.
6.7.2.5
Completing the test
Continue to test another function or end the testing by setting the parameter
TestMode
to
Disabled
under
Main menu/Tests/IED test mode/TESTMODE:1
. If another function is
tested, then set the parameter
Blocked
to
No
under
Main menu/Tests/Function test
modes/Control/SMBRREC(79,0->1)/SMBRREC:X
for the function, or for each
individual function in a chain, to be tested next. Remember to set the parameter
Blocked
to
Yes
, for each individual function that has been tested.
6.7.3
Autorecloser for 1/3-phase operation STBRREC (79)
Verification of the automatic reclosing function STBRREC (79) for single and three-
phase reclosing attempt, can be considered to consist of two parts; one part to verify the
internal logic and timing of the function and one part to verify its interaction with the
protection system. This section deals with verification of the auto-reclosing function
itself. However, it is practical to start initiate the autoreclosing function by activating a
protection function, for example, by secondary injection tests.
1MRK 505 293-UUS A
Section 6
Testing functionality
105
Commissioning manual