Eaton – 9355 – 10 VA – Three Phase Online UPS

Eaton 9355 UPS — 10 kVA Three-Phase Online Double-Conversion

The Eaton 9355 UPS (10 kVA) (formerly the Powerware 9355) is a three-phase, online double-conversion UPS engineered to deliver complete power protection for mission-critical loads. Built for facilities that need reliable uptime without sacrificing floor space, the 9355 provides enterprise-grade conditioning in a cabinet footprint up to 75% smaller than comparable UPS systems.

Unlike many traditional three-phase solutions that require large external battery cabinets, the 9355 comes complete with internal batteries, an integrated power distribution module, and an integrated maintenance bypass switch—reducing installation complexity and accelerating deployment. When requirements grow, Eaton’s patented HotSync paralleling technology allows you to parallel up to four UPS units to add capacity or redundancy while maintaining a compact overall footprint.

Key Features & Benefits

• 10 kVA three-phase protection — Complete power conditioning for critical IT and facility loads.
• Online double-conversion — Continuous conditioning and zero transfer time for sensitive equipment.
• Up to 75% smaller footprint — Saves floor space versus comparable three-phase UPS systems.
• Internal batteries included — Reduces the need for large external battery cabinets.
• Integrated distribution module — Simplifies downstream power integration.
• Integrated maintenance bypass — Enables safer service without interrupting protected loads.
• HotSync paralleling — Parallel up to four units for redundancy and/or capacity growth with less space.

Best-Fit Applications

• Server rooms & edge IT — Compact three-phase protection where space is limited.
• Healthcare & clinical IT — Conditioned power for continuity and sensitive systems.
• Education & enterprise — Reliable UPS protection with flexible growth via paralleling.
• Light industrial — Stable power for controls, automation, and facility loads.

Technical Overview