Check The Undervoltage Block Function; Check The Upper And Lower Busbar Voltage Limit; Check The Overcurrent Block Function - ABB Relion 670 Series Commissioning Manual

1MRK 511 403-UUS Rev. K
locating the allocated binary output for a raise pulse command in the Signal Matrix in PCM600 and
monitoring a positive from this output.
4. After the issue of the raise command, return the applied voltage to VSet (nominal value).
5. Raise the voltage 1% above the upper deadband limit V2 and wait for the issue of a lower
command from the voltage control after the expiry of a constant or inverse time delay set by t1.
Detection of this command will involve locating the allocated binary output for a low pulse
command in the Signal Matrix in PCM600 and monitoring a positive from this output.
6. Return the applied voltage to VSet.
11.10.5.4

Check the undervoltage block function

1. Confirm the setting for Vblock, nominally at 80% of rated voltage.
2. Confirm the voltage control function response to an applied voltage below Vblock, by reviewing the
setting in the local HMI under Main menu /Settings /IED Settings /Control /
TransformerVoltageControl(90, U↕) /TR1ATCC(90, U↕):x/TR8ATCC(90, U↕||):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 Vblock and confirm the response of the voltage control function.
11.10.5.5

Check the upper and lower busbar voltage limit

1. Confirm the settings for Vmin and Vmax in the local HMI under Main menu /Settings /IED
Settings /Control /TransformerVoltageControl(90, U↕) /TR1ATCC(90, U↕):x/TR8ATCC(90,
U↕||):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 Vmin and above Vmax,
by reviewing the settings in the local HMI under Main menu /Settings /IED Settings /Control /
TransformerVoltageControl(90, U↕) /TR1ATCC(90, U↕):x/TR8ATCC(90, U↕||):x /UVPartBk and
Main menu /IED Settings /Control /TransformerVoltageControl(90, U↕) /TR1ATCC(90, U↕):x/
TR8ATCC(90, U↕||):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 Vmin 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 Vmax 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.
11.10.5.6

Check the overcurrent block function

1. Confirm the setting for Iblock in the local HMI under Main menu /Settings /IED Settings /Control /
TransformerVoltageControl(90, U↕) /TR1ATCC(90, U↕):x/TR8ATCC(90, U↕||):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 /IED Settings /Control /
TransformerVoltageControl(90, U↕) /TR1ATCC(90, U↕):x/TR8ATCC(90, U↕||):x /OVPartBk. This
Bay control REC670
Commissioning manual
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Section 11
Testing functionality by secondary injection
SEMOD175185-578 v7
SEMOD175185-588 v7
SEMOD175185-605 v7
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