Replacement Of Wearing Parts; Capacitor - INVT Goodrive800 Pro Series Hardware Manual

Goodrive800 Pro Series Inverter Unit Hardware Manual
For more details about maintenance, contact the local INVT office, or visit our website http://www.invt.com,
and choose Support > Services.

6.2 Replacement of wearing parts

6.2.1 Capacitor

6.2.1.1 Capacitor reforming
If the inverter unit has been left unused for a long time, you need to follow the instructions to reform the DC
bus capacitor before using it. The storage time is calculated from the date the VFD is delivered.
Storage time
Less than 1 year
1 to 2 years
2 to 3 years
More than 3 years
The method for using a voltage controlled power supply to charge the inverter unit is described as follows:
For VFDs of a high voltage class, ensure that the voltage requirement (for example, 380 V) is met during
charging. Capacitor changing requires little current, and therefore you can use a small-capacity power
supply (2A is sufficient).
The method for using a resistor (incandescent lamp) to charge the inverter unit is described as follows:
If you directly connect the drive device to a power supply to charge the DC bus capacitor, it needs to be
charged for a minimum of 60 minutes. The charging operation must be performed at a normal indoor
temperature without load, and you must connect a resistor in series mode in the 3PH circuit of the power
supply.
For a 380 V drive device, use a resistor of 1 kΩ/100W. If the voltage of the power supply is no higher than
380V, you can also use an incandescent lamp of 100W. If an incandescent lamp is used, it may go off or the
light may become very weak.
202202 (V1.0)
No charging operation is required.
The inverter unit needs to be powered on for 1 hour before the first running
command.
Use a voltage controlled power supply to charge the inverter unit:
Charge the VFD at 25% of the rated voltage for 30 minutes,

and then charge it at 50% of the rated voltage for 30 minutes,

at 75% for another 30 minutes,

and finally charge it at 100% of the rated voltage for 30 minutes.

Use a voltage controlled power supply to charge the inverter unit:
Charge the VFD at 25% of the rated voltage for 2 hours,

and then charge it at 50% of the rated voltage for 2 hours,

at 75% for another 2 hours,

and finally charge it at 100% of the rated voltage for 2 hours.

Figure 6-2 380V driving-device charging circuit example
Resistor 1KΩ/100W
Power
Resistor 1KΩ/100W
380V
Resistor 1KΩ/100W
Operation principle
R
S
VFD
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Maintenance and inspection
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