201
Time Operational principle
• 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 220V AC/2A power surge applied to the inverter with single/three-phase 220V AC as
its input voltage. The inverter with single/three-phase 220V AC as its input voltage can apply
Single phase 220V AC/2A power surge. All DC bus capacitors 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:
380V driven device: 1k/100W resistor. LED of 100W can be used when the power voltage is
no more than 380V. But if used, the light may be off or weak during charging.
380V charging illustration of the driven device
9.4.2 Change electrolytic capacitors
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