UPS power supply selection and issues needing attention

Choosing Between Online and Backup UPS Power Supplies

When selecting between an online or backup UPS, it's important to consider the specific needs of your computer equipment and your budget. If your financial situation allows, an online UPS is generally a better choice because it provides continuous power without any interruption. However, if your budget is limited but your system can tolerate brief power interruptions, a backup UPS might be sufficient for your needs.

Domestic vs. Imported UPS Options

It’s often recommended to go with a domestic UPS, especially in recent years when the quality of local small-scale UPS systems has significantly improved. Choosing a domestic model supports national technological and economic growth and also offers greater convenience in terms of maintenance—such as easy access to spare parts, skilled technicians, and faster repair times. While imported UPS systems are known for their high quality, they can be more challenging to maintain due to limited local support. If a fault occurs, it may take longer to get it fixed, which could lead to prolonged downtime. Domestic models are also better suited for China’s power conditions, as many have a wide input voltage range and regulated output, making them ideal for areas with unstable electricity supply. For instance, the People's Bank of Shenzhou choosing domestic UPS systems was a smart and practical decision.

Understanding the Power Supply Conditions at the Site

Before purchasing a UPS, it's essential to assess the power supply status of the location. Most standard UPS units require an input voltage of 380V±10% or 220V±10%, and a frequency of 50Hz±0.5Hz. If the site’s power supply doesn’t meet these standards, you should opt for a UPS with a wider input range. In such cases, adding a voltage regulator or a stabilizer before the UPS can help ensure stable operation.

Estimating the Required UPS Power Capacity

To determine the right size of the UPS, calculate the total power consumption of your computer and its peripherals. Multiply this total by a safety factor of 1.2 to 1.3 to account for unexpected loads and ensure reliable performance under varying conditions.

Key Considerations When Selecting a Backup UPS

When choosing a backup UPS, pay special attention to the switching time. This refers to how quickly the UPS can take over when the main power fails. If the switching time is too long, your computer may shut down during the transition, defeating the purpose of the UPS. It’s crucial to select a model that meets the switching requirements of your equipment.

Important Points When Choosing an Imported UPS

Some imported UPS models, such as those from brands like Pulse or Exide, use different wiring configurations compared to Chinese standards. For example, in the U.S., the wiring is typically "left live, right neutral," whereas in China, it's the opposite. Additionally, the plug and socket designs differ. If you're using an American-standard UPS in China, make sure to properly adjust the internal wiring rather than just swapping the plug, as improper connections can cause serious issues.

Maintenance Convenience Is Also a Key Factor

UPS failures are inevitable, so it's important to choose a model that is easy to maintain. A UPS that's difficult to service can lead to significant downtime and higher repair costs in the long run. Always consider the availability of local support and the ease of repairs when making your selection.