ABB RET670 Installation And Commissioning Manual page 189

1MRK 504 088-UEN C
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Installation and commissioning manual
• Confirm power system base quantities I1Base, I2Base, UBase.
Main menu/Settings/Setting Group N/Control/
TransformerVoltageControl(ATCC,90)/VCSx/VCPx/General
and
Main menu/Settings/Setting Group N/Control/
TransformerVoltageControl(ATCC,90)/VCSx
• Confirm that the setting for short circuit impedance Xr2 for TR1ATCC or
TR8ATCC is in accordance with transformer data:
• Short circuit impedance, available on the local HMI under Main menu/
Settings/General settings/Control/
TransformerVoltageControl(ATCC,90)/VCSx/VCPx/Xr2.
• Confirm that the setting for TCMYLTC or TCLYLTC is in accordance with
transformer data:
• Tap change timeout duration - effectively the maximum transformer tap
change time, tTCTimeout, available on the local HMI under Main menu/
Settings/Setting Group N/Control/TransformerTapControl(YLTC,
84)/TCMx/TCLx/tTCTimeout.
• Load tap changer pulse duration - required length of pulse from IED to
load tap changer, tPulseDur, available on the local HMI under Main
menu/Settings/Setting Group N/Control/
TransformerTapControl(YLTC,84)/TCMx/TCLx/tPulseDur.
• Transformer tap range, LowVoltTap and HighVoltTap, available on the
local HMI underMain menu/Settings/General Settings/Control/
TransformerTapControl(YLTC,84)/TCMx/TCLx/LowVoltTap and
HighVoltTap.
• Load tap changer code type - method for digital feedback of tap position,
CodeType, available on the local HMI under Main menu/Settings/
General settings/Control/TransformerTapControl(YLTC,84)/
TCMx/TCLx/CodeType.
During the installation and commissioning, the behavior of the
voltage control functions for different tests may be governed by a
parameter group, available on the local HMI under Main menu/
Settings/General settings/Control/
TransformerVoltageControl(ATCC,90)/VCSx/VCPx. These
parameter settings can cause a Total Block, Automatic Block or
Alarm for a variety of system conditions including over and under
voltage, over current and tap changer failure. It is important to
review these settings and confirm the intended response of the
voltage control function for different secondary injection tests.
Verifying settings by secondary injection
Section 13
183