Eaton Power Xpert 9395 UPS, Installation And Operation Manual

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Introduction
Power Xpert
TM
9395 UPS (450–825 kVA) Installation and Operation Manual 164201725—Rev 10 www.eaton.com/powerquality 1-5
1.2.3 Sync Control
An optional Eaton 9395 Sync Control maintains the critical load outputs of two separate single module Power
Xpert 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.
1.2.4 Single-Feed Kit
An optional kit is available for converting the dual-feed rectifier and bypass inputs to a single-feed
configuration. The kit consists of jumpers for each phase, and the hardware required for installation.
1.2.5 Separate Rectifier Input
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.
1.2.6 Distributed Bypass System
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.
1.2.7 Input Output Module Configuration
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.
1.2.8 Continuous Static Switch
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.
1.2.9 Inherent Redundancy
To deliver greater reliability, the Power Xpert 9395 UPS can be configured by an authorized Eaton Customer
Service Engineer
for inherent redundancy if a FI-UPM is installed. When configured, the UPS automatically
becomes redundant if the load is at or below the capacity of the UPMs minus the capacity of one UPM. Under
normal conditions the UPMs in the UPS share the load equally. If one or more UPMs becomes unavailable and
the load is at or below the capacity of remaining UPMs, the remaining UPMs supply the load instead of
transferring to bypass.