Salicru CV30, User Manual, Page: 93 / 140

Fault Tracking 93 - 140
Fan installation of the inverters 1PH 230V / 3PH 400V
≤
2.2kW and 3PH 220V
≤
0.75kW
Fan installation of the inverters 3PH 400V ≥ 4kW and 3PH 220V ≥ 1.5kW
6.1.2 Capacitors
Reforming the capacitors
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 from 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
• Add 25% rated voltage for 30 minutes
• Add 50% rated voltage for 30 minutes
• Add 75% rated voltage for 30 minutes
• Add 100% rated voltage for 30 minutes
Storing time more than 3
years
Use power surge to charge for the inverter
• Add 25% rated voltage for 2 hours
• Add 50% rated voltage for 2 hours
• Add 75% rated voltage for 2 hours
• Add 100% rated voltage for 2 hours
The method of using power surge to charge for the inverter:
The right selection of power surge depends on the supply power of the inverter.
Single-phase 230VAC/2A power surge can be applied to the inverter with single/three-phase 220-230VAC
input voltage. Apply the voltage between two of the input phases. All DC bus capacitors charge at the same
time because there is one rectifier.
Three-phase 400VAC input voltage inverter needs enough voltage (for example, 400V) during charging. The
small capacitor power (2A is enough) can be used because the capacitor nearly does not need current when
charging.