9 UPS power selection principles that are easily overlooked

1 Estimate the power of the UPS power supply

According to the power consumption of the microcomputer and its external devices, the total power consumption of the equipment is calculated. The total power consumption multiplied by the safety factor is the estimated power of the UPS power supply. The safety factor is generally 1.2-1.3.

2 Selection of domestic and imported UPS power supplies

In the choice between domestic and imported UPS power supplies, it is generally recommended to choose domestic UPS power supplies. In recent years, the quality of domestic small UPS power supplies has been greatly improved. The selection of domestic small UPS power supplies is, on the one hand, a support for the country's economic and technological development, and on the other hand, it is very convenient in maintenance, such as relatively complete spare parts, and satisfactory maintenance capabilities and maintenance speed. Imported UPS power supplies are generally of better quality, but due to difficulties in maintenance technology and spare parts, once a failure occurs, it is often not repaired in time and cannot be used for a long time. In terms of working performance, domestic UPS power supplies are more in line with domestic power supply conditions. For example, some models of U and UPS power supplies have a wide input voltage range and a voltage-stabilizing output function, which can adapt to some environments with poor power supply conditions in my country. The electronic engineering construction of the People's Bank of China proposed the policy of using domestic UPS power supplies, which is undoubtedly a good start.

3. Selection of online and backup UPS power supplies

Whether to choose online or backup UPS power supply should be determined according to the needs of the microcomputer equipment and economic conditions. If the economic conditions are good, you can choose online UPS power supply; if the economic conditions are poor, but it does not affect the normal operation of the microcomputer, the backup UPS power supply can also be selected.

4. Selection of UPS power supply for long and short time power supply

The choice between long-term and short-term UPS depends mainly on economic conditions and usage needs. If economic conditions are good, a long-term UPS can be selected, otherwise a short-term UPS plus a small generator set can be selected as a backup power source.

5. Understand the power supply status of the UPS power supply site

Before selecting a UPS power supply, you need to understand the power supply status of the site where the UPS power supply is used. Generally, the requirements of the UPS power supply for the mains input are: input voltage 380V±10%, 220V±10%; frequency 50±0.5Hz. If the power supply condition of the site is lower than this standard, you should choose a UPS power supply with a wide input range. You can also add a voltage stabilizer or voltage regulator to the front end of the UPS power supply.

6 Issues to note when selecting a backup UPS power supply

When selecting a backup UPS power supply, special attention should be paid to the power switching time. The switching time is mainly reflected in the switching time of the UPS power supply and the switching time requirements of the microcomputer. If the selection is inappropriate, the microcomputer will shut down when the city power is off, and the APC UPS power supply will not play the role of the APC UPS power supply.

7. Compare products from three different suppliers and choose the best one

At present, there are many manufacturers and sellers of small UPS power supplies, and the quality of their products varies greatly, and the prices also vary greatly. Therefore, you should consult and investigate more, and carefully compare the technical indicators and performance-price ratios of different products; and choose the best one after comparing three products.

8 Issues to note when choosing imported UPS power supply

The wiring method of some imported UPS power input and output is different from that of my country. When choosing, you should pay attention to the improvement method. The wiring method of the input and output of American UPS power supplies, such as PulSe and EXIDE, is opposite to the Chinese standard. Simply put, my country's single-phase power supply is left zero and right fire, while the United States is left fire and right zero. In addition, it should be noted that the style of American standard socket plugs is also different from that of my country. When changing the American national standard plug and socket to the Chinese national standard plug and socket, you should pay attention to the internal joint relationship and cannot simply adjust the line.

9. Convenience during maintenance is also a factor in selection

It is normal for UPS power supply to fail. When selecting a UPS power supply, the convenience of maintenance is also a factor that cannot be ignored, otherwise it will cause inconvenience in maintenance during use.