
General/UVPartBk
and
Main menu/Settings/IED Settings/Control/
TR8ATCC (90)/n:TR8ATCC/General/OVPartBk
.
3.
Decrease the injected voltage slightly below the
Umin
value and check for the
corresponding blocking or alarm condition on the local HMI. For an alarm
condition, the voltage regulation function is not blocked and a raise command
should be issued from the IED.
4.
Increase the applied voltage slightly above the
Umax
value and check for the
corresponding blocking or alarm condition on the local HMI. For an alarm
condition, the voltage regulation function is not blocked and a lower
command should be issued from the IED.
6.7.1.6
Check the overcurrent block function
1.
Confirm the setting for
Iblock
in the local HMI under
Main menu/Settings/
IED Settings/Control/TR8ATCC (90)/n:TR8ATCC/TCCtrl/Iblock
2.
Confirm the voltage control function response to an applied current above
Iblock
, by reviewing the settings in the local HMI under
Main menu/Settings/
IED Settings/Control/TR8ATCC (90)/n:TR8ATCC/General/OCBk
.
3.
Inject a current higher than the
Iblock
setting and confirm the alarm or
blocking condition is present on the local HMI. If an automatic or total
blocking condition occurs, change the applied secondary voltage and confirm
that no tap change commands are issued from the associated binary outputs.
This situation can also be confirmed through reviewing the disturbance and
service reports on the local HMI.
6.7.1.7
Automatic voltage control for tap changer, parallel control TR8ATCC
Master follower voltage regulation
1.
For the transformers connected in the parallel group, confirm that
OperationPAR
is set to
MF
.
2.
For parallel operation, it is also recommended to confirm for parallel group
membership, defined by setting
TnRXOP
in the local HMI under
Main menu/
Settings/IED Settings/Control/TR8ATCC (90)/n:TR8ATCC/ParCtrl
The general parallel arrangement of transformers are defined by setting
TnRXOP
to
On
or
Off
. The following rules are applicable on the settings
T1RXOP
–
T4RXOP
.
If IED
T1
and
T2
are connected,
•
T1RXOP
shall be set to
On
in instance 2 of TR8ATCC,
•
T2RXOP
shall be set to
On
in instance 3 of TR8ATCC,
•
T2RXOP
and
T3RXOP
shall be set to
On
in instance 1 of TR8ATCC,
and so on.
Section 6
1MRK 504 126-UEN -
Testing functionality
70
Commissioning Manual
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