![]() ![]() Power source voltage: Be sure that the UPS input plug/connector matches the receptacles of the input power source. The larger the wattage load, the shorter the runtime will be. The smaller the wattage load connected, the longer the batteries will work. A UPS which accepts external battery packs can be used to extend runtime during a blackout. For more details, refer to How to Figure Out the Required UPS Capacity?īackup runtime: Runtime is how long a UPS system can support the attached devices with electricity during a blackout. Normally, one should choose a UPS with an output watt capacity 20-25% higher than the total wattage of the devices needed to connect, which helps the UPS deal with fluctuations in power demand, leave margin for other equipment, and reduce the chance of overload. One should calculate the load (combined amount of power of multiple devices) and then choose a proper UPS. The higher the capacity, the more electronic equipment or devices it can support. UPS capacity: Measured in “watts”, the UPS capacity is how much power a UPS system can provide. For more details, refer to different types of UPS. Rack-mount models are typically used in server and networking applications. Tower models stand upright on the ground or on a desk/shelf. Desktop models are compact to fit on a desk. UPS size: UPS systems come in a variety of sizes and form factors such as desktop models, tower models and rack-mount models. Listed below are ten main factors one should take into consideration when buying a data center UPS. Since it is the highest level of UPS redundancy among N+1, 2N and 2(N+1), 2(N+1) architecture always costs more no matter in initial component costs or operating costs.įactors to Consider When Buying Data Center UPS This level of redundancy can tolerate multiple component failures or can maintain N+1 redundancy with an entire system down. ![]() It is actually the double amount capacity needed plus an extra capacity or a redundant N+1 system. In a 2N UPS redundancy, each side would be able to handle 100% load capacity.Ģ(N+1) UPS redundancy offers the highest reliability among the three in data centers. If two UPS(s) are required, there would be completely diverse and independent two UPS(s) for resiliency. Similarly, in an N+1 UPS redundancy system, if the total data center load is 1,000 kW and each UPS platform can handle 500 kW, three data center UPS of 500 kW are needed (N=1,000 kW N+1=1,500 kW).ĢN UPS redundancy equates to fully redundant data center architecture separated in two sides (side A and side B), or mirrored systems. The “N” would represent the exact number of bananas you need (35) and the extra one banana is the “+1”. Imagine you need to buy 35 bananas for 35 school children in one class and want to buy an extra one in case of unexpected shortage. Here is an example to understand N+1 UPS deployment better. N+1 UPS deployment provides minimal reliability by adding a component to support a single failure or requirement of that component. In other words, N is the same as non-redundant. N is the full UPS capacity required to handle the total load. There are three main UPS redundancy architectures, N+1, 2N and 2(N+1). ![]() In order to meet the high uptime requirements for data centers, UPS systems are often deployed with redundancy. ![]()
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