Teach you how to buy UPS power supply

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I. What is a UPS? What are its working principles and application scope?

An Uninterruptible Power Supply (UPS) is a power protection device that enables the connected load equipment to remain unaffected by external power system interruptions for a certain period of time.

 

With the continuous development of digital computer technology, its application scope has gradually expanded into key sectors such as industrial control, banking, electric power, finance, and communications. This has also imposed more stringent requirements on the stability and reliability of computers. The emergence of UPS is aimed at addressing common issues in power systems, such as sudden power outages, voltage instability, and power line noise*, ensuring that computer systems can continue to operate normally when power supply problems occur.

 

The working principle of a UPS is analogous to a water reservoir. When the external power supply is normal, the UPS not only supplies power to the load normally but also converts part of the electrical energy into chemical energy for storage. Once the external power supply is suddenly interrupted, the UPS immediately activates its inverter device, which quickly converts the stored chemical energy back into electrical energy to continuously power the load, thereby ensuring the normal operation of the load equipment.

II. How to Choose a UPS Power Supply That Suits Your Needs

Currently, there are as many as 20 common UPS brands on the market, with a total of 1,643 various UPS products available. Faced with such a wide range of options, how do you determine which one is right for you?
 

1. Choosing Between On-Line UPS and Standby UPS

Generally, on-line UPS systems are more expensive but offer comprehensive protection functions. They can filter out most of the electrical noise and interference present in the power grid, fully ensuring the stability and safety of connected load equipment. Standby UPS systems, on the other hand, are smaller in size and more affordable. For less critical equipment or systems, they can still effectively prevent data loss caused by sudden power outages.

 

If budget allows, an on-line UPS is certainly the preferred choice. However, from an economic standpoint, a standby UPS is sufficient for ordinary households or general office environments with low power stability requirements.
 

2. Selecting the Right UPS Capacity

Currently, the average power consumption of a single computer is approximately 250VA. A 500VA standby UPS can provide power to such a computer for enough time to ensure you have ample opportunity to save files and shut down the computer properly. If you have multiple computers at home, you can calculate the total power consumption and then select a UPS with a suitable capacity accordingly.

 

For special commercial and industrial applications, capacity calculation becomes much more complex. These sectors often require UPS systems to support dozens of computers continuously for over ten hours, or even dozens of hours, in the event of a grid power outage.