Eaton Power Xpert 9395, Installation And Operation Manual

Page: 28 / 269

Eaton Power Xpert 9395 UPS Installation and Operation Manual 164201725—Rev 15 5
11..22..22 FFiieelldd IInnssttaalllleedd U UP PM M
A Field Installed UPM (FI-UPM) provides N+1 redundancy for the UPS system. The FI-UPM may be installed at
any time in the future when power needs change. The module cabinet is installed on the left side of the UPS
cabinet and is wired directly to the UPS. No input or output wiring changes are needed for redundancy.
Operation remains the same as the original UPS.
11..22..33 S Syynncc C Coonnttrrooll
An optional Eaton 9395 Sync Control maintains the critical load outputs of two separate single module Eaton
9395 UPS systems in synchronization. This option facilitates the uninterrupted transfer of the load from one
load bus to another by means of transfer switches. The Sync Control is housed in a wall–mounted panel that
can be located between the UPS units for easy wiring.
11..22..44 S Siinnggllee--FFeeeedd K Kiitt
An optional kit is available for converting the dual-feed rectifier and bypass inputs to a single-feed configuration.
The kit consists of jumpers and bus bar extensions for each phase, and the hardware required for installation.
11..22..55 S Seeppaarraattee R Reeccttiiffiieerr IInnppuutt
The Power Xpert 9395 450–550 kVA UPS can be supplied with separate rectifier inputs for each UPM. Separate
inputs provide increased flexibility and reliability by allowing multiple input sources to supply the UPS. Input
circuit breaker CB1 is not installed with this configuration. AC input control to the UPS and each UPM rectifier is
to be provided by the customer.
All sources that feed the separate rectifier inputs must be from a common ground point.
11..22..66 D Diissttrriibbuutteedd B Byyppaassss S Syysstteem m
There are two types of redundancy: UPS based (based on the number of UPSs) and UPM based (based on the
number of UPMs). Each UPS contains two to three UPMs.
A distributed bypass UPS system with two to five UPSs can be installed to provide a 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 UPM is taken out of service for maintenance or
is not operating properly, a redundant UPM continues to supply uninterrupted power to the critical load. A
Powerware Hot Sync
®
Controller Area Network (CAN) Bridge Card provides connectivity and operational mode
control. The distributed bypass system consists of two to five UPSs each with a parallel CAN card, and a
customer-supplied tie cabinet or load distribution panel to act as a tie point.
All UPSs in the distributed bypass system must contain the same number of UPMs. Mixed UPS kVA ratings are
not permitted.
The tie cabinet must contain Module Output Breakers (MOBs) with dual auxiliary contacts for control of the
system. Without dual auxiliary MOBs, UPMs are not allowed to go to bypass individually during servicing. All
UPMs will go to bypass instead of just the UPM needing service, decreasing critical load protection. With dual
auxiliary MOBs, one UPM can be bypassed while the remaining UPMs support the load as long as the
remaining UPMs have the capacity to do so.
11..22..77 IInnppuutt O Ouuttppuutt M Moodduullee C Coonnffiigguurraattiioonn
The UPS can be supplied in an Input Output Module (IOM) configuration without the bypass input connections,
the static switch, the motorized wraparound bypass breaker, and the backfeed protection contactor. This
configuration is primarily used in multiple UPS parallel systems that do not need a bypass for each UPS and use
a separate System Bypass Module (SBM) to provide system bypass capabilities.
11..22..88 C Coonnttiinnuuoouuss S Sttaattiicc S Sw wiittcchh
A continuous static switch is used to provide transfer of the load from the inverter to the bypass source in the
event the inverter become unavailable. The continuous static switch eliminates the need for an additional
motorized wraparound bypass breaker.
Introduction