gefran GPC - Voltmeter Input Offset; Voltmeter Input Digital Filter; 3.10. Measuring Line Voltage

81901A “MSW_GPC-40/600A”_03-2021_ENG_page 29
3.9.7. Voltmeter input offset
Address
Format
GPC-OP
menu
Acronym
Global / M/E1/E2
GF_eXpress menu
Attribute Retentive Type Unit of mea- surement Default
Single-
node
Multi-
node
Description
1468
444 16 bit
04.10.03
o.tVL
M
MainMenu → M → Inputs →
VT load input → o.tVL_1
R/W
■
Float
(####.#)
V 0.02492 04:13:03 E1
MainMenu → E1 → Inputs →
VT load input → o.tVL_2
4540 04:16:03 E2
MainMenu → E2 → Inputs →
VT load input → o.tVL_3
The parameter sets the offset applied to the value read from the TV_LOAD voltage transformer input to match the expected value. Its
function is to correct any constant reading errors.
This offset applies linearly to all readings.
The parameter is present if the VLOAD option exists.
min...max: -99.9...99.9
3.9.8. Voltmeter input digital filter
Address
Format
GPC-OP
menu
Acronym
Global / M/E1/E2
GF_eXpress menu
Attribute Retentive Type Unit of mea- surement Default
Single-
node
Multi-
node
Description
1466
442 16 bit
04.10.04
Ft.tVL
M
MainMenu → M → Inputs →
VT load input → Ft.tVL_1
R/W
■
Float
(####.#)
V 0.12490 04:13:04 E1
MainMenu → E1 → Inputs →
VT load input → Ft.tVL_2
4538 04:16:04 E2
MainMenu → E2 → Inputs →
VT load input → Ft.tVL_3
The parameter sets the time constant value of the digital filter applied to the value read from the input of the TV_LOAD voltage transform-
er. The filter calculates the average of the values read in the specified time interval.
With 0.00 no filter is applied.
The parameter is present if the VLOAD option exists.
min...max: 0.0...20.0
The Advanced Power Controller is able to measure the line
voltage value. The parameters present depend on the type
of load (single-phase or three-phase).
A voltage presence check is active for each phase, which
switches off the GPC module if it detects incorrect values.
For three-phase loads, unbalance diagnostics is provided
to switch off the load and indicate the fault with LEDs.
The VOLTAGE_STATUS parameter contains information on
the status of the line voltage, including the mains frequency.
With three-phase loads, diagnostics are available for cor-
rect phase connection, lack of one voltage and unbalance
of the three line voltages.
The following diagrams show the processing sequences of
the line voltage value.
3.10. Measuring line voltage