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DELAY TRIGGERING
In firing modes ZC and BF, with inductive loads, this function inserts delay triggering in the first cycle.
The delay is expressed in degrees settable in parameter dL.t, from 0 to 90 degrees.
◊
Optimised Delay-Triggering value for transformer monophase: 60°
◊
Optimised Delay-Triggering value for 3-phase transformer: 90°, 90°, 40°
708*
DL.T
FEEDBACK MODES
The GFW has the following power control modes:
V-voltage
V
-squared voltage
2
I-current
I
-squared current
2
P-power
A control mode is enabled with parameter Hd.6
Voltage feedback (V)
To keep voltage on the load constant, this compensates possible variations in line voltage with reference to the rated voltage
saved in riF.V. (expressed in Vrms).
The voltage value maintained on the load is (ref.V*P%_man/100) and is indicated in the Modbus 757 register.
Voltage feedback (V
)
2
To keep voltage on the load constant, this compensates possible variations in line voltage with reference to the rated voltage
saved in riF.V. (expressed in Vrms).
The voltage value maintained on the load is (rif.V*
Current feedback (I)
To keep current on the load constant, this compensates possible variations in line voltage and/or variations in load impedance
with reference to the rated current saved in riF.I. (expressed in Arms).
The current value maintained on the load is (rif.I*P%_man/100), and is indicated in the Modbus 757 register.
Current feedback (I
)
2
To keep current on the load constant, this compensates possible variations in line voltage and/or variations in load impedance
with reference to the rated current saved in riF.I. (expressed in Arms).
The current value maintained on the load is (rif.I*
Power feedback P
To keep power on the load constant, this compensates both variations in line voltage and variations in load impedance with
reference to the rated power saved in riF.P. (expressed in kWatt).
The current value maintained on the load is (rif.P*P%_man/100), and is indicated in the Modbus 757 register.
60
Delay triggering
R/W
(first trigger only)
√
√
(P%_man/100), and is indicated in the Modbus 757 register.
0 ...90°
(P%_man/100), and is indicated in the Modbus 757 register.
Three-phase star load without
neutral or triangle closed with
DIP5 = ON (inductive load)
90
Zone 1
Other load configurations
60
Zone 1
80997D_MSW_GFW_400-600_04-2021_ENG
90
90
Zone 2
Zone
60
60
Zone 2
Zone 3
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