Check The Upper And Lower Busbar Voltage Limit; Check The Overcurrent Block Function - ABB rec670 Commissioning Manual

Section 10
Testing functionality by secondary injection
10.9.4.5
10.9.4.6
160
General settings/Control/TransformerVoltageControl(ATCC,90)/
TR1ATCC:x/TR8ATCC:x/UVBk that may cause an alarm, total or automatic
block of the voltage control function to be displayed on the local HMI.
3. Apply a voltage slightly below Ublock and confirm the response of the voltage
control function.

Check the upper and lower busbar voltage limit

1. Confirm the settings for Umin and Umax in the local HMI under Main menu/
Settings/Setting group N/Control/TransformerVoltageControl(ATCC,
90)/TR1ATCC:x/TR8ATCC:x/Voltage/Umax or Umin and Main menu/
Settings/IED Settings/Control/TR8ATCC (90)/TR8ATCC:n/Voltage/
Umax
2. Confirm the voltage control function response to an applied voltage below Umin
and above Umax, by reviewing the settings in the local HMI under Main menu/
Settings/General settings/Control/TransformerVoltageControl(ATCC,
90)/TR1ATCC:x/TR8ATCC:x/UVPartBk and Main menu/General
Settings/Control/TransformerVoltageControl/TR1ATCC:x/
TR8ATCC:x/OVPartBk. These conditions may cause an alarm or total block
of the voltage control function to be displayed on the local HMI.
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.

Check the overcurrent block function

1. Confirm the setting for Iblock in the local HMI under Main menu/Settings/
Setting group N/Control/TransformerVoltageControl(ATCC,91)/
TR1ATCC:x/TR8ATCC:x/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/
General settings/Control/TransformerVoltageControl(ATCC,91)/
TR1ATCC:x/TR8ATCC:x/OVPartBk. This condition may cause an alarm or
total block of the voltage control function to be displayed on the local HMI.
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.
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Bay control REC670 2.1 IEC
Commissioning manual