Product name: computer ups power supply
Equipment type: online UPS
Time to market: 2010
Rated capacity: 3KVA
Output voltage range: 220V
Input voltage range: 220V
Standby time: depending on the battery
Conversion time: 0ms
Product size: 140×362×267mm
OEM: OEM available
Precautions for UPS power supply:
1. Regular inspection
Regularly check the terminal voltage and internal resistance of each unit battery. For 12V unit batteries, if the terminal voltage difference between each unit cell exceeds 0.4V or the internal resistance of the battery exceeds 80mΩ during the inspection, each unit cell should be charged in equalization to restore the internal battery. Block and eliminate the terminal voltage imbalance between each unit cell. When equalizing charging, the charging voltage can be 13.5~13.8V. The vast majority of batteries that have been well-balanced and charged can restore their internal resistance to below 30mΩ.
During the operation of the UPS power supply, the above-mentioned imbalance caused by the changes in the characteristics of each unit battery over time cannot be eliminated by the internal charging circuit of the UPS power supply. Therefore, the battery with obvious imbalance of this characteristic has occurred. If the group does not adopt offline equalization in time, its imbalance will become more and more serious.
The UPS power supply has been shut down for more than 10 days. Before restarting, the UPS power supply should be started under no load conditions to re-float the battery for more than 10 to 12 hours using the electric circuit of the charger sub-product in the machine and then run with load.
The UPS power supply has been in a floating charge state for a long time without a discharge process, which is equivalent to being in a "storage ready for use" state. If this state lasts for too long, it will cause the battery to fail due to "storage for too long". It is mainly manifested in the increase of the internal resistance of the battery, which can reach several Ω in severe cases.
We found that the usable capacity of the battery is about 97% of its rated value after 1 month of storage at room temperature of 20℃. If stored for 6 months, its usable capacity becomes 80% of the rated capacity. If the storage temperature increases, its usable capacity will decrease.
Therefore, it is recommended that the user deliberately unplug the mains input every 20 °C months, and let the UPS power supply work in a state where the battery provides energy to the inverter. But this kind of operation should not take too long. When the load is about 30% of the rated output, discharge for about 10 minutes.