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The selection of online and backup UPS power supply

The selection of online or backup UPS power supply should be determined according to the needs of microcomputer equipment and economic conditions. If the economic conditions are good, optional online UPS power supply; If the economic conditions are poor, but does not affect the normal operation of the computer, the backup UPS power supply can also be selected.

Selection of domestic and imported UPS power supply

Selection of domestic and imported UPS power supply, it is generally recommended to choose domestic UPS power supply. In recent years, the quality of domestic small UPS power supplies has been greatly improved. The selection of domestic small UPS power supply, on the one hand, is to support the development of the national economy and technology, on the other hand, there is great convenience in maintenance, such as spare parts are more complete, maintenance capacity and maintenance speed are more satisfactory. The quality of imported UPS power supply is generally good, but due to the difficulties in maintenance technology and spare parts, once failure occurs, it often cannot be repaired in time, and it cannot be used for a long time. Domestic UPS power supply in the work performance, is more in line with the domestic power supply situation, such as some models of UPS power input voltage range is relatively wide, have voltage stable output function, to adapt to some environments of poor power supply conditions in our country. Shen Guo People's Bank electronic project construction, proposed the use of domestic UPS power supply policy, is undoubtedly a good start.

Know the power supply status of the site where the UPS power supply is used.

Before purchasing the UPS power supply, know the power supply status of the site where the UPS power supply is used. General UPS power supply for the mains input requirements are: input voltage 380V& plusmn; 10%, 220V& plusmn; 10%; Frequency 50& plusmn; 0.5Hz. If the site power supply condition is lower than this standard, choose another UPS power supply with a wide input range, or add a voltage regulator or voltage regulator to the front end of the UPS power supply.

Estimate the power of the UPS power supply

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

Problems that should be noted in the selection of backup UPS power supply

When choosing backup UPS power supply, special attention should be paid to the switching time of the power supply. The switching time is mainly reflected in the switching time of UPS power supply and the requirements of the microcomputer for the switching time. If the choice is improper, it will cause the microcomputer to stop when the mains power is cut off, and it can not play the role of the apcups power supply.

Problems that should be noted when selecting imported UPS power supply

Some imported UPS power input and output wiring methods are different from our country, and we should pay attention to the improvement method when selecting. The UPS power supply in the United States, such as Baoshi (PulSe), EXIDE (EXIDE) and other models of UPS power input and output wiring mode is contrary to Chinese standards. Simply put, China's single-phase power supply is left zero right fire, while the United States is left fire right zero. In addition, it should be noted that the style of American standard sockets and plugs is not the same as our country. When the national standard plug socket in the United States is changed to the national standard plug socket in China, attention should be paid to the internal connector relationship, and the line cannot be simply adjusted.

Convenience in maintenance is also a factor in the selection of

UPS power failure is a normal phenomenon, in the selection, the convenience of maintenance, is also a factor that can not be ignored, otherwise it will bring inconvenience to the use of maintenance.