Most customers said that redundancy, scalability, modularity, and maintainability are key decision factors for their purchase of UPS. Therefore, most sales staff regard the above factors as the key content of their sales proposal. However, if the customer’s budget and important factors in the purchase decision are not fully considered in advance, the sales proposal may be in a disadvantaged competitive position.
The higher the availability level of the configuration, the higher its cost. This cost refers to the cost of building a new UPS system. Therefore, it includes not only the cost of the UPS structure but also the cost of the entire network critical physical infrastructure (NCPI) for data management.
The latter includes generators, switchgear, refrigeration systems, fire protection systems, raised floors, racks, lighting facilities, physical space, and commissioning costs for the entire system. These are only upfront costs and do not include operating costs, such as maintenance and maintenance costs.
When calculating the above cost, we assume that each cabinet has an average floor area of 2.79m2, and the power density ranges from 23kW to 3.8kW per cabinet. If the cost-sharing equipment area increases, the cost per rack will also decrease.
For a long time, when planning critical load power supplies, future development must be fully considered, so that the UPS system can provide 10 or 15 years of support for the load.
Facts have proved that planning in accordance with this principle is very difficult. In the 1990s, in order to provide a framework for discussion and compare various facilities, the concept of “watts per square area” was proposed. However, because people cannot reach a consensus on the meaning of “square area”, this power supply design index has caused many misunderstandings.
Recently, with the general trend of technology simplification, people have gradually adopted the concept of “Wat Yin Cabinet” to express system capacity.
Facts have proved that since the number of racks in a unit space is easy to count, this calculation method is more accurate. Regardless of the choice of load method, it is important to choose the configuration scheme from the beginning so that the design process proceeds in the right direction.
Nowadays, many scalable modular UPS system designs have emerged, so that UPS power capacity can be expanded with the growth of IT demand.
Uninterrupted power supply, comprehensive improvement of power supply quality, and an end-to-end comprehensive protection scheme for the entire network from equipment to data transmission are inseparable from the UPS power supply system. So it can be seen that the UPS design considerations are very important. The following specific instructions are for the UPS design attention matter.