What a 30kVA UPS is for
A 30kVA UPS (30 kW at unity power factor) protects mid-size server rooms, growing comms hubs and departmental IT. At this size three-phase supply is standard, and the load is large enough that redundancy and runtime planning start to matter as much as raw capacity.
Three-phase and load balancing
Above 20kVA, three-phase UPS are the norm. They distribute power evenly across phases, integrate with three-phase building supplies and run more efficiently. Balancing the load across all three phases is essential — an unbalanced load reduces usable capacity and can trip the UPS. A site survey confirms your phase balance before specification.
Modular vs monolithic at 30kVA
A monolithic 30kVA UPS (one self-contained cabinet) is simpler and cheaper upfront. A modular frame — such as Sentryum Rack or Legrand TriMOD — lets you start below 30kVA and add hot-swappable modules for N+1 redundancy and pay-as-you-grow capacity. Choose modular if you expect growth or want downtime-free maintenance.
Runtime, redundancy and models
Internal batteries give minutes; external cabinets or lithium banks extend runtime to 30–60 minutes or more. Build N+1 redundancy with a modular frame or by paralleling two monolithic units. Strong 30kVA options include the Riello Sentryum S3T, Multi Power and Legrand TriMOD HE. Use the UPS Finder for a tailored recommendation.
Frequently asked questions
Is a 30kVA UPS single or three-phase?
Three-phase is standard at 30kVA, to balance loads and integrate with three-phase building supplies.
Modular or monolithic 30kVA UPS?
Monolithic is cheaper upfront. Modular (Sentryum Rack, TriMOD) adds hot-swap modules, N+1 redundancy and pay-as-you-grow capacity.
How long will a 30kVA UPS run at full load?
Minutes on internal batteries; external battery cabinets or lithium banks extend this to 30–60 minutes or more depending on load.
Can I parallel two 30kVA UPS?
Yes. Sentryum parallels up to 8 units and TriMOD up to 160kW, so you can build N+1 or capacity configurations.