ABB REG670 Commissioning Manual page 265

1MRK 502 073-UUS A
Generator protection REG670 2.2 ANSI and Injection equipment REX060, REX061, REX062
Commissioning manual
• Confirm that the setting for short circuit impedance Xr2 for TR1ATCC (90) or
TR8ATCC (90) is in accordance with transformer data:
• Short circuit impedance, available on the local HMI under Main menu/
Settings/General settings/Control/TransformerVoltageControl(ATCC,
90)/TR1ATCC:x/TR8ATCC:x/Xr2.
• Confirm that the setting for TCMYLTC (84) or TCLYLTC (84) 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)/
TCMYLTC:x/TCLYLTC:x/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)/
TCMYLTC:x/TCLYLTC:x/tPulseDur.
• Transformer tap range, LowVoltTap and HighVoltTap, available on the local
HMI under Main menu/Settings/General Settings/Control/
TransformerTapControl(YLTC,84)/TCMYLTC:x/TCLYLTC:x/
HighVoltTap and .
• 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)/TCMYLTC:x/
TCLYLTC:x/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)/
TR1ATCC:x/TR8ATCC:x. 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.
Terminology
The busbar voltage V is a shorter notation for the measured voltages Va, Vb, Vc or
B
Vij, where Vij is the phase-phase voltage, Vij = Vi -Vj, or Vi, where Vi is one single-
phase-to-ground voltage.
Testing functionality by secondary injection
Section 13
259