Eaton 9355 Parallel UPS (10/15 kVA) User's Guide 164201601—Rev E0 1
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A parallel system with up to four uninterruptible power supplies (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
®
CAN Bridge Card provides connectivity for system metering and
operational mode control. The parallel system consists of two to four UPSs, each with a parallel CAN Bridge
Card and a parallel cabinet.
Figure 1 shows the Eaton 9355 UPS and an optional Extended Battery Module (EBM).
IMPORTANT
Startup and operational checks must be performed by an authorized Eaton Customer Service Engineer, or the
warranty terms specified on the product's resources page become void. See Chapter 8 Warranty for details.
This service is offered as part of the sales contract for the UPS. Contact an Eaton service representative in
advance (a minimum two-week notice is required) to reserve a preferred startup date.
Figure 1. The Eaton 9355 UPS and EBM (3-High Cabinets Shown)
Providing outstanding performance and reliability, the Eaton 9355 UPS's unique benefits including the
following:
• Online UPS design with pure sine wave output. The UPS filters and regulates incoming AC power and
provides consistent power to your equipment without draining the battery.
• More wattage in less space with a 0.9 power factor–protecting more equipment and leaving more room
for expansion.
• Support for Powerware Hot Sync paralleling of multiple modules for redundancy or extra capacity.
• Input current total harmonic distortion (THD) of less than five percent, using active input power factor
correction.
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