13.5.3.3 TCMYLTC and TCLYLTC general settings
SEMOD171501-150 v7
GlobalBaseSel
: Selects the global base value group used by the function to define (
IBase
),
(
UBase
) and (
SBase
).
LowVoltTap
: This gives the tap position for the lowest LV-voltage.
HighVoltTap
: This gives the tap position for the highest LV-voltage.
mALow
: The mA value that corresponds to the lowest tap position. Applicable when reading of
the tap position is made via a mA signal.
mAHigh
: The mA value that corresponds to the highest tap position. Applicable when reading
of the tap position is made via a mA signal.
CodeType
: This setting gives the method of tap position reading.
UseParity
: Sets the parity check
On
/
Off
for tap position reading when this is made by Binary,
BCD, or Gray code.
tStable
: This is the time that needs to elapse after a new tap position has been reported to
TCMYLTC until it is accepted.
CLFactor
: This is the factor designated “a” in equation 129. When a tap changer operates at
nominal load current (current measured on the HV-side), the ContactLife counter decrements
with 1, irrespective of the setting of
CLFactor
. The setting of this factor gives the weighting of
the deviation with respect to the load current.
InitCLCounter
: The ContactLife counter monitors the remaining number of operations
(decremental counter). The setting
InitCLCounter
then gives the start value for the counter
that is, the total number of operations at rated load that the tap changer is designed for.
EnabTapCmd
: This setting enables/disables the lower and raise commands to the tap
changer. It shall be
On
for voltage control, and
Off
for tap position feedback to the
transformer differential protection T2WPDIF or T3WPDIF.
TCMYLTC and TCLYLTC Setting group
SEMOD171501-157 v3
General
Operation
: Switching the TCMYLTC or TCLYLTC function
On
/
Off
.
IBase
: Base current in primary Ampere for the HV-side of the transformer.
tTCTimeout
: This setting gives the maximum time interval for a raise or lower command to be
completed.
tPulseDur
: Length of the command pulse (URAISE/ULOWER) to the tap changer. It shall be
noticed that this pulse has a fixed extension of 4 seconds that adds to the setting value of
tPulseDur
.
13.6 Logic rotating switch for function selection and LHMI
presentation SLGAPC
SEMOD114936-1 v4
Section 13 1MRK 511 358-UEN A
Control
332
Application manual
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