INTRODUCTION
Eaton 9395 Plus 1 UPS (225–275 kVA) Installation and Operation Manual
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164201710 Rev 2
www.eaton.com\powerquality
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1.2.3
Sync Control
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.
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 Eaton 9395 225–275 kVA Plus 1 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.
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 one or two 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.
