Eaton 9155 UPS 8-15kVA – Split Phase Power

Eaton 9155 UPS

Maximum power, minimum footprint

The Eaton 9155 UPS provides premium online backup power and scalable battery runtimes for IT and electrical engineering infrastructure in corporate, healthcare, banking and industrial applications. Packing maximum battery runtime into a very small footprint, the 9155 UPS is a complete power protection solution. The 9155 can be equipped with an integrated, customizable power distribution module that includes a maintenance bypass switch.

  • Split-phase, double-conversion online operation offers highest reliability
  • Small footprint saves on valuable floor space
  • Monitor and manage UPS and other devices via a web-based interface
  • Available in 8 kVA, 10 kVA, 12 kVA, and 15 kVA units

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Product description

Eaton 9155 UPS

High power density means more power protection in a small footprint. Eaton’s 9155 single-phase uninterruptible power supply (UPS) is a proven market winner in its class. With scalable battery runtime options, the 9155 packs maximum battery runtime into a very small footprint. Customize your UPS with power distribution and an integral maintenance bypass switch for complete power protection.

Features of the Eaton 9155 UPS:

  • True double-conversion online operation protects
    connected equipment from all nine of the most common
    power problems
  • Compact tower design delivers maximum power density
    entire unit is only 12 inches wide and 33 inches deep,
    including batteries
  • Provides 5,500 watts per square foot with .9 output
    power factor — protecting more equipment for every utility
    dollar spent, and leaving more room for expansion in the
    data center
  • Easily add redundancy or increase system capacity with
    patented Eaton Hot Sync® paralleling technology
  • Manage your power devices in your physical or virtual
    environment with Eaton’s Power Xpert® software and
    Intelligent Power™ Software Suite
  • Advanced Battery Monitoring (ABM) technology increases
    battery life
  • Enhanced communications allow network connectivity and remote management:
    • Two X-Slot communication bays
    • Relay output contacts
    • Two programmable signal inputs
    • Remote emergency power-off (REPO)

The following options for the Eaton 9155 are available:

  • Maintenance Bypass Module (MBM)
    The optional MBM is installed on the UPS rear panel and is used to bypass the
    UPS during maintenance or servicing. The maintenance bypass switch on the
    MBM provides a Make-Before-Break (MBB) wrap-around bypass for UPS service
    without shutting down the load.
  • Power Distribution Module (PDM)
    The optional PDM provides the same functionality as the MBM and also comes
    equipped with several different types of output receptacles.
  • Wall-Mounted Bypass Switch
    The optional wall-mounted bypass switch is used to bypass the UPS during
    maintenance or servicing, providing wrap-around bypass for UPS service without
    shutting down the load.
  • Parallel Tie Cabinet
    An optional parallel system with up to three UPSs can be installed to provide a
    parallel capacity and/or redundant system. This load sharing system provides more
    capacity than a single UPS and can provide backup, depending on the load and
    configuration. In addition, when one UPS is taken out of service for maintenance or
    is not operating properly, a redundant UPS continues to supply uninterrupted
    power to the critical load. A parallel Powerware Hot Sync Controller Area Network
    (CAN) Bridge Card provides connectivity for system metering and operational mode
    control. The parallel system consists of two to three UPSs, each with a parallel
    CAN Bridge Card, and a parallel tie cabinet.
  • Input Isolation Transformer
    The optional input isolation transformer is located at the bottom of a 3-high UPS
    model. The input isolation transformer provides a neutral from a 208V or 240V
    input source with 240V output and can be wired to the UPS or to an MBM/PDM.
  • Seismic Kit
    The optional seismic kit secures the UPS and optional EBMs for Zone 4 seismic
Double Conversion Online UPS

Double Conversion Technology

Double Conversion Topology

The Eaton 9155 uninterruptible power supply uses the Double Conversion Online UPS topology.  This  provides the ultimate in clean and stable electrical power for critical applications.  Incoming AC power is fed to the UPS’ rectifier converting it from AC to DC power. The converted DC power routes to a battery charging circuit and to the inverter for conversion back to AC power. The resulting “double converted” electrical power is pure sine wave output providing near perfect electrical power for connected equipment.

To ensure 7/24 up time the double conversion UPS topology utilizes a static “bypass switch” within its circuity design. If the 9155 UPS detects a system failure, audible alarms will sound as the bypass switch is engages. This routes power around the failed UPS and ensures critical load power to target equipment.  This very important feature allows for 100% up time for critical equipment during repair.

In the event of total power failure, the UPS will power off the rectifier when the loss of power is detected. The UPS’ internal backup batteries will continue to supply DC power to the inverter. There is no transfer time as the transition to battery power is instantaneous. This feature provides true uninterruptible power to mission critical equipment.

Technical Specifications


Eaton 9155

Rated Power Capacity (Apparent/Active)

8, 10, 12 and 15 kVA at 0.9 power factor

Voltage/frequency range

200V–240V with neutral or with optional input transformer
50/60 Hz (45 to 65 Hz)

Efficiency (Maximum%)

90% typical

Overload Capacity

150% for 5 sec / 125% for 1 min (online), (Normal Operation) 110% for 10 min

Max charging (adjustable)

Default is 3.4A per battery string. Charger current is configurable from 0.5A to 25A per string with an overall maximum of 34A (limited by input current)

Battery Module

9Ah, sealed, lead-acid, maintenance-free

Operating Temperature

10°C to +40°C, +45°C with 7.5% derating; Batteries recommended max. +25°C

Operating Elevation

< 1000m at +40°C, < 3000m at +25°C

Acoustic Noise

< 53 dBA at 1 meter (noise less room) typical


EMC compliance: 47 CFR Part 15/ICES-003 Class A
Markings: cULus, NOM-NYCE
Quality ISO 9001:2015, ISO 14001:2004
Safety certifications: UL1778 5th Edition, CSA C22.2 No. 107.3-14, NOM-NYCE
Surge: ANSI C62.41 Category B3, IEC 61000-4-5


(1) relay contact, (1) REPO, (2) environmental input
(2) X-Slot communication bays


2 years electronics, 2 years battery warranty (USA and Canada)

Estimated Run-Time

Battery Run Time Chart: