[Formerly Powerware 9355 UPS]

Designed to be a high quality power backup system for IT and electrical engineering infrastructure in corporate, healthcare, banking, and industrial applications, the EATON 9355 UPS packs maximum battery runtime into a very small footprint. With premium double-conversion backup power and scalable battery runtimes, the EATON 9355 is a complete three-phase power protection solution; and it can be equipped with an integrated, customizable power distribution module that includes a maintenance bypass switch.


Features & Benefits

  • Sleek tower design includes internal batteries and an integrated power distribution module for a complete solution to your uninterruptible power supply requirements
  • Industry-leading power density has up to a 75 percent smaller footprint yet provides 13 percent more power capacity than comparable industrial UPS systems or commercial UPS systems
  • High 0.9 output power factor provides more real power in less space
  • Proprietary ABM technology includes an innovative three-stage battery charging system that extends battery service life
  • Hot Sync technology enables paralleling of up to four 9355 UPS units for additional capacity and redundancy
  • Has scalability with 10 KVA models that can be upgraded with an additional 10 KVA of capacity

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Product Snapshot
Power Rating 10-30 kVA
Voltage 208/220/400/480/600 Vac three phase
Frequency 50/60 Hz
Configuration Tower
Product Series Powerware


Technical Specs

Power rating 20 kVA/18 kW and 30 kVA/27 kW at 0.9 power factor
Diagnostics Full system self-test at startup
UPS bypass Automatic on overload or UPS failure
Parallel for redundancy Yes, using Powerware Hot Sync technology for redundancy and capacity
Dimensions and weights See model selection table
Overload 150% for 5 sec / 125% for 1 min (online), 110% for 10 min
Nominal Input Voltage 208V/120V, 220V/127V +10, -15%
480V/277V, 600V (480+600 with transformer)
400V models also available
Operating frequency 50/60 Hz (45 to 65 Hz)
Input power factor 0.99 typical
Input current distortion <5% THD
Nominal output voltage 208/120, 220/120 Vac
480/227 with output transformer
Output voltage regulation ±1% static; ±4% dynamic with 100% step load recovery within 1 ms response time
Efficiency 91%, typical
Heat dissipation (BTU/hr) 20 kVA models
6,762 @ 208V and 220V input
10,450 @ 480V and 600V (with input isolation transformer)
30 kVA models:
9,220 @ 208V and 220V input
13,831 @ 480V and 600V (with input isolation transformer)
Battery type 9 Ah, sealed, lead-acid, maintenance-free
Battery runtime See battery backup time chart
Battery replacement Field-replaceable
Charger Default is 8A
Parallel for redundancy Yes, using Powerware Hot Sync technology and capacity
LCD display Graphical LCD with blue backlight
LEDs (4) LEDs for notice and alarm
Audible alarms Yes
Communication ports (1) RS-232, (1) relay contact, (1) REPO,
(2) environmental input
Communication slot (2) X-Slot communication bays
Power management software Bundled Software Suite CD
Operating Temperature 50–104ºF (10–40ºC), 45ºC with 7.5% derating;
Optimal battery performance: 77ºF (25ºC)
Storage Temperature 32–77ºF (0–25ºC); Recommended battery storage: 59–77ºF (15–25ºC)
Relative humidity 0–95%, non-condensing
Audible noise < 58 dBA at 1 meter depending on load
Altitude <3000m
Safety certifications IEC 62040-1-1, IEC 60950, EN 62040-1-1, UL 1778, NOM-0190SCP8-1993
EMC compliance EN 50091-2 Class A
Quality ISO 9001: 2000 and ISO 14001:1996
Markings UL, cUL, NOM-NYCE


1. Due to continuous product improvements, program specifications are subject to change without notice.


Industries & Applications

Designed for electrical engineering infrastructure in corporate, healthcare, banking, and industrial applications, the EATON 9355 is particularly suited to:

  • Smaller data centers
  • Smaller telecom
  • Hospitals, clinics, and medical centers
  • Financial Institutions



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EATON 9355 Brochure
EATON 9355 Brochure
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