INVT Goodrive350 Series User Manual

Goodrive350 series high-performance multi-function inverter Chapter 8
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8.4 Capacitor
8.4.1 Capacitor reforming
If the inverter 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 inverter is
delivered.
Storage time
Operation principle
Less than 1 year
No charging operation is required.
1 to 2 years
The inverter needs to be powered on for 1 hour before the first running
command.
2 to 3 years
Use a voltage controlled power supply to charge the inverter:
Charge the inverter 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.
More than 3 years
Use a voltage controlled power supply to charge the inverter:
Charge the inverter 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.
The method for using a voltage controlled power supply to charge the inverter is described as follows:
The selection of a voltage controlled power supply depends on the power supply of the inverter. For
inverters with an incoming voltage of 1PH/3PH 230 V AC, you can use a 230 V AC/2 A voltage
regulator. Both 1PH and 3PH inverters can be charged with a 1PH voltage controlled power supply
(connect L+ to R, and N to S or T). All the DC bus capacitors share one rectifier, and therefore they
are all charged.
For inverters 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 (2 A is sufficient).
The method for using a resistor (incandescent lamp) to charge the drive 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 380 V, 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.

INVT Goodrive350 Series Specifications

General

Brand	INVT
Model	Goodrive350 Series
Category	DC Drives
Language	English