Check The Undervoltage Block Function; Check The Upper And Lower Busbar Voltage Limit - ABB REG670 Commissioning Manual

Section 13
Testing functionality by secondary injection
13.10.3.4
13.10.3.5
262
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.

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/
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 Vblock and confirm the response of the voltage
control function.

Check the upper and lower busbar voltage limit

1. Confirm the settings for Vmin and Vmax 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 Vmin
and above Vmax, 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 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
Generator protection REG670 2.2 ANSI and Injection equipment REX060, REX061, REX062
1MRK 502 073-UUS A
SEMOD175185-578 v5
SEMOD175185-588 v5
Commissioning manual