WEG MVW3000 Series, Programming Manual

Page: 146 / 264

5
DETAILED PARAMETER DESCRIPTION
P0320 - Flying Start/Ride-Through
Adjustable range: 0 to 3 Factory setting: 0
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Configurations
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Functions
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Flying Start
Description:
It determines whether the Flying Start and Ride-Trought functions are active.
✓
NOTE!
With the Ride-Through function active, disable function 27 of the protection relay of the input.
Table 5.53: Flying Start/Ride-Through
P0320 Function
0 Inactive
1
Flying Start
2
Flying Start and Ride-Through
3
Ride-Through
✓
NOTE!
This parameter can be changed only with the motor stopped.
P0331 - Voltage ramp time
P0332 - Dead time
P0333 - Ride-through time
Adjustable range: P0331 = 0.2 to 50.0 s
P0332 = 1.0 to 40.0 s
P0333 = 0.0 to 20.0 s Factory setting: P0331 = 8.0 s
P0332 = 10.0 s
P0333 = 10.0 s
Acesso: Menu
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Configurations
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Functions
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Flying Start
Description: Actuation with P0202 = 0, 1 or 2 (V/F Control):
Parameter P0331 sets the time required for the output voltage, starting from 0 V, to reach the nominal voltage.
The Flying Start function allows starting a spinning motor. This function only acts when the inverter is enabled.
At the start, the inverter will impose the reference speed, creating a voltage ramp with time defined in P0331.
The parameter P0332 sets the minimum time the inverter waits before restarting the motor after the line recovery
in Ride-Through.
This time is counted from the line voltage drop, and it is necessary for the motor de-
magnetizing.
P0332 is also used at the start with Flying Start, before the beginning of the Flying Start. Set this time (P0332)
to twice the rotor constant of the motor.
The Ride-Through function allows the inverter recovery without DC link undervoltage, when a voltage dip occurs
in the supply line.
The inverter will indicate F0309 (Timeout in Ride-through state Waiting Line) if the voltage dip lasts longer than
P0332 + P0333 seconds. If the drive is performing the pre-charge procedure, this time will be extended until
the completion of the process.
If Ride-Through is enabled and a voltage dip occurs, causing the DC link to drop below the undervoltage level,
the output pulses are disabled and the motor coasts. If the line supply returns to its normal value, the inverter
enables the pulses again, imposing the speed of the reference instantaneously (as in the Flying Start function)
and applying a voltage ramp with the time defined in P0331. Refer to the
Figure 5.39 on page 5-71 . The Flying
Start function does not work when P0202 = 3 or 4.
During the Ride-Through, the input cubicle is opened and the pre-charge system is activated.
MVW3000 | 5-70