How to choose the UPS power supply in the equipment room?

Update:2020-07-15
Abstract:

Enterprise data centers are becoming more and more impo […]

Enterprise data centers are becoming more and more important today. How to ensure the stable operation of enterprise data centers has become a very critical element. UPS is currently the standard accessory of many enterprises in data centers, so how to choose a UPS power supply suitable for enterprise applications? ?  
Classification of UPS:
Under normal circumstances, UPS systems are divided into three categories, backup (or offline), online interactive and double conversion (online). Different manufacturers will provide different configurations of UPS. Customers choose the UPS they need according to their goals, applications, and functional requirements, as well as their desire to differentiate their products.
How to choose UPS uninterruptible power supply
1. First determine how much power your data center equipment needs. Generally speaking, the power of ordinary PC or industrial control machine is about 200W, Apple machine is about 300W, server is between 300W and 600W, the power value of other equipment can be Refer to the instruction manual of the device. Just buy as required.
2. Secondly, it should be understood that there are two ways to express the rated power of the UPS: apparent power (unit VA) and actual output power (unit W). This difference is caused by the presence of reactive power. The conversion relationship between the two is : Apparent power * Power factor = actual output power. Therefore, it must be calculated when buying.
3. UPS is usually divided into two types: industrial frequency machine and high frequency machine. The power frequency machine is composed of SCR rectifier, IGBT inverter, bypass and power frequency boost isolation transformer. Because the working frequency of the rectifier and the transformer are both 50 Hz, it is called the power frequency UPS as the name suggests.
Given these options, how should you choose your UPS configuration?
When choosing a UPS, you need to understand your business needs, as well as your financial budget, and set the capital and operating costs of the UPS system. You also need to understand the availability of UPS, then the UPS system you choose should not be those that can tolerate only a few hours of downtime. The choice of your UPS configuration should be consistent with your availability needs, and your budget should be set based on the potential loss of data center downtime.
Cooling infrastructure. Depending on the UPS system selected, add cooling load to your facility. For large data centers, even a one or two percentage point reduction in UPS efficiency can be converted into a large amount of heat, and excess heat must be removed to protect the equipment. Can your existing infrastructure handle this load, or is it necessary to upgrade your UPS?
space. The UPS system occupies valuable data center floor space, so make sure that the configuration you choose will not require additional space in your facility. The current computer room can be said to be one inch of land and one inch of gold, so the size of the UPS is also particularly important.
redundancy. You have a temporary backup power system (UPS), so why not back up your backup? If availability is a key design consideration, then redundancy is necessary. Adding a backup UPS can avoid a single point of failure, thereby improving the reliability of the power system. A common backup configuration is N+1 (for example, if you need six UPSs to run your data center, then the design of N+1 involves seven devices), and the others include 2N (double the number of devices required), 2N+1 etc. More redundancy can improve reliability or availability, but it also requires more equipment costs (higher capital expenditures), more floor space (depending on configuration), and lower efficiency.
Design complexity. Simple designs are often less prone to human errors and independent failures, but they may still lack some of the features you prefer to see in UPS systems. For example, the switch in an online interactive UPS system is a potential point of failure. In a double-conversion design, this point of failure does not exist. In addition, complex designs may require more maintenance than simple designs (or simply, higher repair costs).
Modular. If you expect your IT needs to grow, then you should consider a modular approach. "Buy ahead", buying more equipment than you need now will cost you more capital expenditure, storage space and potential operating costs. The modular approach allows you to add infrastructure when you need it, to avoid the need to increase the previous facilities into waste.
There are four ways to extend the working life of UPS batteries. In general, it can be summarized in four sentences: proper temperature, regular charging and discharging, good use of communication functions, and timely replacement of damaged batteries. There is no university question or elementary school question in the study of power supply. As long as you pay attention to observation, you can summarize a variety of features and methods to facilitate our design.
PPR ELBOW