5-1
EATON
Powerware
®
9390 IAC-B and IAC-T Installation and Operation Manual
S
164201590 Rev C
powerware.com
Chapter 5
IAC Features, Options, Controls, and Operation
5.1 IAC Standard Features
The IAC has many standard features that provide cost-effective and consistently reliable
power distribution. The following descriptions provide a brief overview of the IAC controls,
and standard and optional features.
5.1.1 Maintenance Bypass Configuration
A maintenance bypass switch (MBP), in combination with the maintenance isolation switch
(MIS), can be used to completely isolate the UPS during service. The UPS can be serviced
or replaced without interrupting power to critical systems.
5.1.2 Parallel Redundant Configuration
Module output breakers (MOBs) 1 and 2 enable two UPS modules to be paralleled
together for redundancy. An optional system level breaker (SLB) provides output control
to the critical load for the whole system.
5.1.3 Parallel Redundant Configuration with Maintenance Bypass
MOBs 1 and 2 enable two UPS modules to be paralleled together for redundancy. The
MBP, in combination with the MIS, can be used to completely isolate the UPS during
service without interrupting power to critical systems.
5.1.4 Customer Interface
The IAC uses UPS building alarm inputs for MBP and MOB monitoring. One alarm input will
detect when the MBP is closed and the system is on bypass. A second building alarm is
used in parallel redundant systems to detect when the MOBs are closed.
5.1.5 Installation Features
The IAC can be installed in a
line-up-and-match
or
standalone
configuration. The cabinet
can be permanently bolted to the floor or left standing on leveling feet. Power and control
wiring can be routed through the top or bottom of the cabinet with connections made to
easily accessible terminals. Line-up-and-match cabinets are wired through knockouts in the
side panels of the units.
5.1.6 Expansion
The IAC supports custom configurations and scalability to adapt to changing and future
power and distribution needs. See paragraph 5.2 for available options.
Summary of Contents for Powerware 9390 IAC-B
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