Maintenance Bypass Module; Sync Control; Single-Feed Kit; Separate Rectifier Input - Eaton Power Xpert Plus 1 Installation And Operation Manual

1.2.3

Maintenance Bypass Module

The Maintenance Bypass Module (MBM) enables power to completely bypass and
isolate the UPS so that the UPS can be safely serviced or replaced without
interrupting power to critical systems.
1.2.4

Sync Control

An optional Power Xpert 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.
1.2.5

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 and bus bar extenders for each
phase, and the hardware required for installation.
1.2.6

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.
1.2.7

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 can contain two to three
UPMs.
A distributed bypass UPS system with two to five UPS units 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
provides connectivity and operational mode control. The distributed bypass system
consists of two to five UPS units 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 the 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.
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Power Xpert 9395 UPS (450–550 kVA) Installation and Operation Manual
Controller Area Network (CAN) Bridge Card
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INTRODUCTION
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