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Revision B MX28B-1200 PRODUCT MANUAL
MX28B-1200/2400 7
4. PRODUCT OVERVIEW AND TECHNICAL DESCRIPTION
4.1 Description
The APC Models MX28B-1200/2400 represents a family of stand-alone -48V dc power plants.
Through the use of modular power and distribution box frames, a system is configurable in such
a manner that it will support most typical applications within the specified current range of up to
3600 amps without special application engineering or assistance.
The system is designed to start as a base unit capable of supplying 1200 amps of –48V dc power
in a single box frame with integrated power distribution breakers and an advanced control and
monitoring module. Standard distribution for a power bay includes up to 48 plug-in circuit
breakers (1 to 100 amps), or large panel-mounted circuit breakers (250 to 700 amps).
Expansion of the base unit is accomplished by adding power frames and distribution frames on
either side of the base unit The distribution box frames come with a variety of circuit breaker
and fuse options. Power expansion of the 1200 amp plant to a 2400 amp plant only requires the
addition of splice plates to the existing bus structure.
An optional low voltage disconnect (LVD) can be provided on either the battery or the load side
in each power bay. Systems incorporating power distribution frames need an external LVD unit
A 1200 amp MX28B is shown in. Figure 4-1. A block diagram is shown in Figure 4–2.
Figure 4-1 MX28B-1200