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What is the power of UPS? How to choose UPS power? The sum of the squares of UPS active power and reactive power is equal to the square of apparent power. The general active power is around 60% -70% of the apparent power. Confirm the power of the devices we want the UPS to carry, and then we can confirm the power of the UPS. Generally speaking, we recommend that the load power accounts for 30% to 80% of the UPS power.

What is the power of UPS?

W represents real work, VA represents virtual work, and there is a power factor difference between the two, W=VAcos θ， This cos θ It's the power factor, and what exactly is the power factor? Different products have different values, some are 0.6 and some are 0.8. Currently, most commercially available products are set at 0.7. The power of UPS designs varies among different manufacturers. Take Santo UPS as an example:

Backup type: 500VA-1000VA

Online: 1KVA-120KVA (multiple machines can be connected in parallel for 6KVA and above)

Axel series: 1KVA-1200KVA

20KVA is its apparent power, and its effective power is determined by the input power factor, output power factor, and load power factor of the UPS host. If the host is a high-frequency machine, the input power factor is about 0.95, and the output power factor is about 0.85. The load depends on whether it is a linear load or a nonlinear load (capacitive or inductive). In short, a 20KVA UPS actually carries loads ranging from 15KW to 16KW. No matter how high the power is, it can also be added in parallel. I hope it can help you.

How to choose UPS power?

To determine the power of your device, generally speaking, the power of a regular PC or industrial computer is around 200W, that of an iPhone is around 300W, and that of a server is between 300W and 600W. The power of UPS power supply should be determined based on two aspects: load and delay.

1. Load. Determine the amount of load in order to solve the problem that can be driven.

2. Delay. Delay refers to the issue of how long power can be supplied after a power outage. Under a given load capacity and UPS power, the duration of delay depends on the capacity of the power supply battery. The longer the delay, the larger the required battery capacity, which also means an increase in investment. With a load of 3000 watts, using a 100ah 12V battery and 16 series connected units to form 192 volts, the calculation shows that 3000 ÷ 192=15.625A, 100 (ah) ÷ 15.625 (A)=6.4 (hours), can provide power for 6 hours and 24 minutes.

The selection of UPS power supply is based on the wattage (power) of the on-site equipment. For example, if your on-site equipment has 10KW, you can choose 10 ÷ 0.8=12.5KW, which means that a 10KW equipment requires a 12.5KVA UPS power supply, but there is no 12.5 in the industry. Generally, the specifications of UPS are 1kVA, 2kVA, 3kVA, 5kVA, 6kVA, 8kVA, 10kVA, 15kVA, 20kVA, and so on.

UPS should not be operated under full load for a long time. Backup UPS generally selects rated power

A load capacity of 60% -70% of the rated power is generally selected for online UPS. In order to extend the service life of batteries, UPS should not be operated under excessive light load for a long time.

The ability of UPS to carry non-linear loads mainly depends on its reactive power. When the reactive power is high, the ability to cope with nonlinear loads is strong. Therefore, reactive power should be used as the standard to select UPS.

The above is an introduction to the selection of UPS power. The input power factor of UPS power can be increased to 0.95 or above. Generally speaking, an increase in input power factor is beneficial to the input power grid because it reduces interference with the grid. For UPS, the benefits are not significant because the amount of power required by UPS is still absorbed according to its own methods and requirements.

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