If SESRSYN (25) as an internal function or external device is not operated by the
injection, input signal SYNC must be connected as a permanent high signal or
controlled by a switch.
3.
Read and make notes of the reclosing operation counters on the local HMI under
Main menu/Tests/Function status/Control/SMBRREC(79,0->1)/SMBRREC:
1
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
.
5.
Make arrangements for indication, recording and time measurements.
The signals for ,52a, RI, CLOSECMD, 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.
6.7.2.2
Switching the autorecloser for 3-phase operation function to
Enabled and
Disabled
1.
Set the
Operation
setting to
Disabled
and check the state.
2.
Set the
Operation
setting to
Enabled
and check the state, including SETON and
READY.
The CB should be closed and ready.
3.
If external control Disabled/Enabled is connected, check that it works.
Set
Operation
to
ExternalCtrl
and use that control to switch Enabled and Disabled,
and check the state of the function.
6.7.2.3
Verifying the autorecloser for 3-phase operation function SMBRREC (79)
Select the test cases to be run according to what is applicable to the particular application.
It can be, for example, three-phase single-shot reclosing or two-shot reclosing. Below, a
case with three-phase single-shot reclosing is described.
1.
Set
Operation
=
Enabled
.
2.
If the autorecloser for 3-phase operation function SMBRREC(79) is not to be
operated, ensure that the SMBRREC input is activated. If SMBRREC(79) 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 pick-up.
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 RI input.
Observe and preferably record the operation. The BR relay shall trip and reclose
(pick-up). 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
1MRK 505 293-UUS A
Section 6
Testing functionality
103
Commissioning manual
