Selection Guides
Comparisons and sizing methods for choosing between topologies, architectures and transfer schemes, with the trade-offs stated plainly.
Selection Guides
ATS vs STS: Choosing the Right Transfer Switch
An automatic transfer switch and a static transfer switch both move a load between two supplies, but only one of them does it without the load going dark. Here is how to tell which your design actually needs.
Selection Guides
How to Size a UPS: Load, Power Factor and Headroom
A repeatable method for sizing an uninterruptible power supply: load inventory first, then kVA against kW, then inrush and derating, then runtime as its own calculation — with the real cost of oversizing and the information a supplier needs to quote.
Selection Guides
Modular DC Rectifier Systems: Sizing and Redundancy
A DC power plant is not an AC UPS with the inverter deleted, and it is not sized like one. Here is the method: amps at the bus voltage you will actually hold, plus the battery recharge current almost every enquiry forgets, then redundancy counted in whole modules.
Selection Guides
Online vs Line-Interactive UPS: Which Topology Fits Your Load
Offline, line-interactive and online double conversion do very different things to the incoming waveform. A decision guide for engineers who have to justify the choice, not just sign for it.NEED SOMETHING SPECIFIC
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