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MX28B200/400 –48 VDC User’s Manual (990-9133) Page 3
2 Introduction
2.1. General Information
DC Power Plants from APC have unique features that make them easy to install,
maintain, and upgrade. The rectifier units are modular and truly “hot-pluggable” into the
shelf assembly without any separate AC wiring. All system settings are made from the
system control unit that provides monitoring and control functions for each component of
the system as well as alarm listings for system diagnosis and maintenance.
The APC Model MX28B is a modular stand-alone -48V DC power plant. It is configurable
in such a manner that it will support most typical applications within the specified current
ranges (either 200 or 400 amperes) without special application engineering or assistance.
Distribution is included for up to 24 plug-in circuit breakers. These circuit breakers can
be 1 to 100 amps, with 60-100 amp breakers requiring two positions and a circuit breaker
adapter kit. An optional low voltage disconnect (LVD) can be provided on either the
battery or the load side. A 400 amp MX28B is shown in Figure 2.1-1 MX28B-400 –48
VDC Power Plant. A block diagram is shown in Figure 2.1–1.
Figure 2.1-1 MX28B-400 –48 VDC Power Plant