• Eaton 9355 UPS technical specs and purchasing
  • Eaton 9355 UPS


Formerly Powerware 9355 UPS

The Eaton 9355 UPS provides premium double-conversion backup power and scalable battery runtimes for UL 924, NFPOA 101 Central Inverter and engineering infrastructure in corporate, healthcare, banking and industrial applications. Packing maximum battery runtime into a very small footprint, the 9355 UPS is a complete three-phase power protection solution. The 9355 can be equipped with an integrated, customizable power distribution module that includes a maintenance bypass switch.

Contact Us about Eaton 9355 UPS

    Features & Benefits

    • Delivers a complete solution in a sleek tower design that includes internal batteries and an integrated power distribution module.
    • Offers industry-leading power density with up to a 75 percent smaller footprint and 13 percent more power capacity than comparable UPSs.
    • Provides more real power in less space with high 0.9 output power factor.
    • Extends battery service life with ABM technology that uses an innovative three-stage battery charging system.
    • Enables paralleling of up to four 9355 UPSs for additional capacity and redundancy with Hot Sync technology.
    • Offers scalability with 10 kVA models that can be upgraded with an additional 10 kVA of capacity.
    • VRLA and Lithium Ion Battery Systems – talk to your representative
    Product Snapshot
    Power Rating10-30 kVA
    Voltage 208/220/400/480/600 Vac three-phase
    Product SeriesPowerware
    Technical Specs


    Power Rating20 kVA/18 kW and 30 kVA/27 kW at 0.9 power factor
    DiagnosticsFull system self-test at startup
    UPS BypassAutomatic on overload or UPS failure
    Parallel for RedundancyYes, using Powerware Hot Sync technology for redundancy and capacity
    Dimensions and Weights See model selection table
    Overload150% for 5 sec / 125% for 1 min (online), 110% for 10 min

    Electrical Input:

    Nominal Input Voltage208V/120V, 220V/127V +10, -15%
    480V/277V, 600V (480+600 with transformer)
    400V models also available
    Operating Frequency 50/60 Hz (45 to 65Hz)
    Input Power Factor 0.99 typical
    Input Current Distortion <5% THD

    Electrical Output:

    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 – ask about lithium ion solutions
    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 SoftwareBundled Software Suite CD


    Operating Temperature50–104ºF (10–40ºC), 45ºC with 7.5% derating;
    Optimal battery performance: 77ºF (25ºC)
    Storage Temperature32–77ºF (0–25ºC); Recommended battery storage: 59–77ºF (15–25ºC)
    Relative Humidity0–95%, non-condensing
    Audible Noise< 58 dBA at 1 meter depending on load


    Safety CertificationsIEC 62040-1-1, IEC 60950, EN 62040-1-1, UL 1778, NOM-0190SCP8-1993 , UL 924, NFPA 101
    EMC ComplianceEN 50091-2 Class A
    QualityISO 9001: 2000 and ISO 14001:1996
    MarkingsUL, cUL, NOM-NYCE

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

    Eaton 9355 UPS BrochureEaton-9355-UPS-Brochure.pdf