TotalBlock
: When this setting is
On
the voltage control function, TR1ATCC for
single control and TR8ATCC for parallel control, is totally blocked for manual as
well as automatic control.
AutoBlock
: When this setting is
On
the voltage control function, TR1ATCC for
single control and TR8ATCC for parallel control, is blocked for automatic control.
Operation
FSDMode
: This setting enables/disables the fast step down function. Enabling can
be for automatic and manual control, or for only automatic control alternatively.
tFSD
: Time delay to be used for the fast step down tapping.
Voltage
UseCmdUSet
: This setting enabled makes it possible to set the target voltage level
via IEC 61850 set point command. This, in turn, makes the setting
USet
redundant.
USet
: Setting value for the target voltage, to be set in percent of
UBase
.
UDeadband
: Setting value for one half of the outer deadband, to be set in percent
of
UBase
. The deadband is symmetrical around
USet
, see section
voltage control for a single transformer"
UDeadband
is
equal to
D
U. The setting is normally selected to a value near the power
transformer’s tap changer voltage step (typically 75 - 125% of the tap changer
step).
UDeadbandInner
: Setting value for one half of the inner deadband, to be set in
percent of
UBase
. The inner deadband is symmetrical around
USet
, see section
"Automatic voltage control for a single transformer"
UDeadbandInner
is equal to
D
U
in
. The setting shall be smaller than
UDeadband
.
Typically the inner deadband can be set to 25-70% of the
UDeadband
value.
Umax
: This setting gives the upper limit of permitted busbar voltage (see section
"Automatic voltage control for a single transformer"
). It is set in
percent of
UBase
. If
OVPartBk
is set to
Auto&ManBlock
, then busbar voltages
above
Umax
will result in a partial blocking such that only lower commands are
permitted.
Umin
This setting gives the lower limit of permitted busbar voltage (see section
"Automatic voltage control for a single transformer"
). It is set in
percent of
UBase
. If
UVPartBk
is set to
Auto Block
or
Auto&ManBlock
, then busbar
voltages below
Umin
will result in a partial blocking such that only raise
commands are permitted.
Ublock
: Voltages below
Ublock
normally correspond to a disconnected transformer
and therefore it is recommended to block automatic control for this condition
(setting
UVBk
).
Ublock
is set in percent of
UBase
.
1MRK 506 375-UEN A
Section 12
Control
Railway application RER670 2.2 IEC
323
Application manual
Summary of Contents for RELION RER670
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