First, what is UPS? What is its working principle and application scope?

Uninterruptible power supply (UPS) is a kind of power supply equipment that can keep its load equipment from external power system interruption for a period of time.

With the continuous development of digital computer technology, its application has gradually penetrated into industrial control, banking, power, military, financial, communications and other important departments, which also puts forward more stringent requirements for the stability and reliability of computers. The emergence of UPS is to cope with the sudden power outage, voltage instability, power line clutter* and other problems that often occur in the power system, to ensure that the computer system can continue to work normally when the power supply problems arise.

UPS works like a reservoir. When the external power supply is normal, UPS will not only supply power to the load normally, but also convert part of the electric energy into chemical energy to store. Once the external power supply is suddenly interrupted, UPS will immediately start the inverters, which will rapidly convert the chemical energy into electrical energy to supply power to the load continuously, so as to ensure the normal operation of the load equipment.

2. How to Choose an UPS Power Supply Suitable for You

According to the statistics of 86ups.com, the most professional UPS power data website in the world, there are as many as 20 UPS power brands in the market, totaling 1643 UPS power products. Faced with so many kinds of UPS power products, which one is more suitable for you?

1. How to Choose Online and Backup UPS Power Supply

Generally, online UPS has a high price, but its protection function is very perfect. It can filter out all kinds of viruses parasitic on the vast majority of power grids and fully guarantee the stability and safety of load equipment. Backup UPS has a small volume and low price, and can also prevent data loss caused by power failure for some equipment systems that are not particularly important.

If economic conditions permit, of course, first online UPS. But from an economic point of view, a backup UPS power supply is enough for ordinary families, or ordinary office space with low requirements.

2. Choose what capacity of UPS power supply is adequate

At present, the average power consumption of a computer is about 250 VA, and a backup 500 VA UPS can provide about 10 minutes of power for it. This period of time has fully guaranteed that you have enough time to save the files, and then shut down the computer normally. There are many computers at home that can calculate the total power by themselves, and then select the appropriate UPS capacity. For some special commercial and industrial applications, the calculation is much more complicated. Because these departments often require UPS to ensure that dozens of computers can work for more than ten hours or even tens of hours without power supply.