INVT GD300-004G-4, Operation Manual

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Goodrive300 inverters Maintenance and hardware diagnostics
235
9.4 Capacitors
9.4.1 Capacitors reforming
The DC bus capacitors must be reformed according to the operation instruction if the
inverter has been stored for a long time. The storing time is counted form the producing date
other than the delivery data which has been marked in the serial number of the inverter.
Time Operational principle
Storing time less than 1
year
Operation without charging
Storing time 1-2 years Connect with the power for 1 hour before first ON command
Storing time 2-3 years
Use power surge to charge for the inverter
• charging 25% rated voltage for 30 minutes
• charging 50% rated voltage for 30 minutes
• charging 75% rated voltage for 30 minutes
• charging 100% rated voltage for 30 minutes
Storing time more than 3
years
Use power surge to charge for the inverter
• charging 25% rated voltage for 2 hours
• charging 50% rated voltage for 2 hours
• charging 75% rated voltage for 2 hours
• charging 100% rated voltage for 2 hours
Use voltage-adjusting power supply to charge the inverter:
The right selection of the voltage-adjusting power supply depends on the supply power of
the inverter. Single phase 220V AC/2A power surge is applied to the inverter of
single/three-phase 220VAC. The inverter of single/three-phase 220V AC can apply single
phase 220V AC/2A power surge(L+ to R, N to S or T). All DC bus capacitors can charge at
the same time because there is one rectifier.
High-voltage inverter needs enough voltage (for example, 380V) during charging. The small
capacitor power (2A is enough) can be used because the capacitor nearly does not need
current when charging.
The operation method of inverter charging through resistors (LEDs):
The charging time is at least 60 minutes if charge the DC bus capacitor directly through
supply power. This operation is available on normal temperature and no-load condition and
the resistor should be serially connected in the 3-phase circuits of the power supply: