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•
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 under
Main 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.
1MRK 504 088-UEN C
Section 13
Verifying settings by secondary injection
183
Installation and commissioning manual
Summary of Contents for RELION RET670
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