ABB DPA 250 S4 modular UPS (IEC 400 V)

ABB's decentralized-architecture modular UPS built from 50 kW online-swappable modules, scalable to 1,500 kW

ABB DPA 250 S4 modular UPS (IEC 400 V) is one of 22 UPS systems tracked in the SecondWatt catalogue, each with specifications, lead times and indicative secondary-market pricing.

ABB DPA 250 S4 dossier: 50 kW online-swappable modules, 250 kW N+1 in a 300 kW frame, 97.6% efficiency, inspection checklist and secondary-market findings.

Who buys it

European, Middle Eastern and Asian data center operators and colocation builders specifying modular UPS in the 250 kW to 1.5 MW band, plus the ABB service channel stocking 50 kW modules against the installed fleet. North American buyers cannot purchase this model and should be routed to the DPA 300-500 UL or MegaFlex UL products instead, which carry UL 1778 listings.

Role in the data center

Primary UPS for IEC-market data halls in the 250 kW to 1.5 MW band, configured N+1 within the frame and paralleled across frames for larger blocks.

Key specifications

Technical summary

Module rating: 50 kW at unity output power factor Frame: 300 kW installed (6 x 50 kW); 250 kW rated N+1 Max system: 1,500 kW across 5 frames and 30 modules Input/output: 220/380, 230/400, 240/415 V AC; 50/60 Hz selectable Efficiency: up to 97.6% module and 97.4% system, double conversion Eco mode: 99% Topology: transformerless, three-level IGBT, online-swappable modules Frame size: 795 x 1978 x 943 mm; 345-667 kg populated Battery: VRLA, VLA, NiCd or lithium-ion at 480-600 VDC, charger per module Standards: IEC/EN 62040-1, 62040-2 class C3, 62040-3 VFI-SS-111

Pricing and availability

Trend: up Lead time, new: In stock to 2-4 weeks at 100-300 kW per dealer; 8 weeks to 1,500 kW. Warranty, used: 1-year typical from refurbishment dealers.

Lifecycle and maintenance

Modular UPS frames outlive their modules: cabinet, bus and static bypass run 15 years or more while the hot-swap power modules carry the fans and DC capacitors that wear. That moves the maintenance question from cabinet age to module hours and module count, since a 1,500 kW ABB DPA system holds 30 module-level fan and capacitor sets. Eaton's 93PM service life extension program replaces power modules, DC capacitors, static switch, fans and the communications board inside the existing shell in about 24 hours, resetting another 10 years. Ask whether that program has been run before pricing any 10-year-old modular frame.

Common failure points

• Power module population — A frame sold on nameplate ships with fewer modules than the rating implies
• Module fans and capacitors — Consumables sit inside each module, so wear scales with module count not cabinet count
• Battery strings — VRLA capacity fades below 80% of nameplate and takes the ride-through with it
• Missing filler plates — Open slots break the cooling path and signal careless handling
• Live Swap entitlement — A frame without the Live Swap label must be bypassed for any module work
• Controls obsolescence — Controller and display boards reach end of life ahead of the power train

Inspection checklist

Module count — count populated slots against the frame rating; Eaton lists a 4 kVA 9PXM power module at 4,377 USD Filler plates — Schneider's manual requires a module or filler plate in every slot on a 50 kW module bay Module consumables — fans and capacitors live inside each module; a 1,500 kW DPA system carries 30 such sets Live Swap label — verify the physical label; a Galaxy VS or VL without it must be bypassed, at 200 mm standoff Module part numbers — confirm interchange; Schneider GVPM50KD is 50 kW at 400/480 V and 25 kW at 208 V Battery age — sealed VRLA turns over at 3-5 years per Eaton lifecycle guidance; assume a full string past that Battery capacity — reject any string below 80% of nameplate capacity under IEEE 1188 practice Battery impedance — ohmic readings above 20% of the commissioning baseline condemn the cell DC bus capacitors — Eaton rates 7 years of continuous duty and up to 10 under favorable conditions Cooling fans — Vertiv field data gives 5-6 years or 40,000-50,000 hours of operation before replacement Static bypass — transfer to bypass and back under load 3 times; verify each module's own bypass path where fitted Parallel kit — verify the parallel hardware and unit count; these frames commonly parallel 4 to 8 ways Firmware — verify the controller revision and card slots; Eaton's 11-point guidance makes firmware access a condition Lifecycle stage — confirm OEM support status; Mitsubishi's 4-stage lifecycle table is the only dated public one Rigging — verify path and lift plan; an ABB DPA 250 S4 frame runs 345-667 kg once populated with modules

Procurement channels

New units through ABB and its IEC channel partners only. No dealer in the North American secondary market stocks this model, and Gruber Power's refurbished brand list contains no ABB at all.