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The configuration of UPS power storage batteries is an important task that requires a rational arrangement based on the power and required DC voltage of the UPS

The configuration of UPS power storage batteries is an important task that requires a rational arrangement based on the power and required DC voltage of the UPS. Different power UPSs have different DC voltage requirements, and the number of blocks per battery group should be a multiple of the minimum required batteries. Generally, when configuring batteries, it is necessary to consider the integer multiple relationship of the number of blocks per battery group.

The steps for configuring UPS power storage batteries are as follows:

1. First, determine the capacity of the UPS being used, assuming the UPS capacity is nKVA.

2. Determine the DC working voltage of the selected UPS power supply, which corresponds to the number of batteries per group, denoted as m (based on batteries with a nominal voltage of 12V). The number of batteries per group should be chosen based on batteries with a nominal voltage of 12V.

3. Determine the backup time T and its corresponding discharge rate C (e.g., a discharge rate of 0.92 for half an hour). Then, the required battery capacity for the UPS power supply at full load is calculated as follows: n * 1000 * 0.8 / 0.9 / (m * 10) * 0.8 / C^4. Once the battery capacity is known, the number of battery groups can be calculated based on it. For example, if batteries with a capacity of 12V 300Ah are required, they can be configured as 3m batteries of 12V 100Ah each, or as 2m batteries of 12V 150Ah each.

4. The total number of batteries is calculated as: Total number of batteries = (Power / DC voltage * Hours) / Ampere-hour per block * Number of blocks per group.

The common UPS DC voltages and the number of blocks per group (based on 12V batteries) are as follows:

- 1k: 36V, 3 blocks

- 2-5K: 96V, 8 blocks

- 6-20K: 240V, 20 blocks

- Above 20K: 384V, 32 blocks

For example, let's consider the configuration of a 5K UPS with an 8-hour delay function. Assuming a power of 5000, a DC voltage of 96V, and 8 blocks per battery group, and using 100Ah batteries, the required total number of batteries is: (5000 / 96 * 8) / 100 * 8 = 32 blocks.

Additionally, please note the following points:

1. Uninterruptible power supply (UPS) systems commonly available on the market are often rated in VA (apparent power). VA represents the product of voltage and current, which is the capacity of the UPS system. For example, a 500VA UPS system with an output voltage of 110V can supply a current of 4.55A. If the current required by your load exceeds 4.55A, it indicates an overload.

2. Another unit used to represent power is "W" (watts). W represents real power, while VA represents apparent power. There is a difference between the two in terms of power factor: W = VA * cosθ. The specific power factor value varies among products, with some being 0.6 and others 0.8. Most commercially available products have a power factor around 0.7.

3. The total capacity should be calculated by summing up the rated capacities of all loads. For loads with high instantaneous activation power consumption, such as ticket printers, their power consumption during activation should be separately calculated to avoid overloading when all devices are activated simultaneously. If the utility



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