Power Protection Notes
News, project notes and specification advice from the Holdvolt team. For the basics of choosing a system, see the buying guides.
Standards · 2 min
Batteries & Maintenance · 2 min
Applications · 2 min
Sizing & Selection · 2 min
IEC 62040-3 Explained: What VFI-SS-111 and Class 1 Mean on an Online UPS Datasheet
That short code is the fastest way to compare two systems on performance. Here is how to read each part, and what…
Batteries & Maintenance · 2 minHow Often to Replace Batteries in an Industrial UPS: VRLA vs LiFePO4 in Hot Climates
A design life on a datasheet assumes a cool room. Here is what heat does to that number, how to plan replacement,…
Applications · 2 minHow to Protect PLCs, Drives and Robots on a Factory Line with an Industrial UPS
You rarely need to back up the whole line. Split the load by what happens when it loses power, then protect each…
Sizing & Selection · 2 minkVA vs kW in an Online UPS: How to Read the Power Factor on a Datasheet
Two ratings sit side by side on every datasheet, and a load has to fit inside both. Here is how to read…