Selection of UPS capacity
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I would like to ask fellow sailors how to determine the capacity of UPS units and automatic switches when designing them.
Is there no senior to answer? :'(
The UPS is selected based on the load. In other words: it is sufficient to add up all the power sources and take into account a certain margin; generally, 60%-70% of the maximum value is sufficient.
I don’t know; I came here to learn*, just passing by
Generally, a UPS achieves its highest efficiency when operating at full load, while the lower the load, the lower the efficiency. Two conventional UPS units are connected in parallel, with each unit being able to handle a load of up to 50%; in most cases, the load is less than 40%. Under such load conditions, the efficiency of the UPS units generally does not exceed 82% ； If a modular UPS is used, such as in a 2+1 redundant configuration, the maximum load can reach 67%, with an efficiency as high as 90%. This results in the best performance in terms of system efficiency, energy consumption, equipment utilization, and investment protection. Such a design concept represents an excellent response in terms of environmental protection and energy conservation to the current policies that strongly advocate for energy savings and emission reduction
The capacity of a UPS is determined by adding up your total electricity consumption and then multiplying that figure by 1.5. Basically, include the power consumption of all devices that operate on 220V. There should be a power supply cabinet for 24V; just include that cabinet as well. There are also all kinds of messy things, included as well.
Don’t understand, just passing by; I’ve learned*learned*, thanks
It depends on what type of power supply your UPS provides. If it’s for the DCS, then you need to add up the power consumption of each cabinet, as well as that of devices such as operation stations, engineer stations, printers, etc. Add up all these values, multiply them by a certain coefficient, and then convert the result into KVA units. Choose an UPS model with a capacity that is close to this value. The rest are similar; it’s just about adding up all the devices that need power. . As for whether a redundant UPS is needed, it depends on your budget and insurance requirements; generally, one unit is sufficient.