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Magnum VS –48 Vdc User’s Manual Page 2
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. The Magnum VS 50 has 1 shelf, holding up to five rectifiers for
a rated current of 50 A. The Magnum VS 100 has 2 shelves, holding up to ten rectifiers for a
rated current of 100 A. All system settings are made from a standard PC using a serial cable or
a 10/100 Base T connection. The controller provides monitoring and control functions for each
component of the system and stores alarm listings for system diagnosis and maintenance. For
ease of operation, a display with LCD readout and 5-button keypad can be inserted in rectifier
slot 5
Figure 2.1-1 Magnum VS 50 –48 Vdc Power Plant
The APC Magnum VS is a modular stand-alone -48 Vdc power plant. It is configurable in such
a manner that it will support most typical applications within the specified current ranges (10-100
A) without special application engineering or assistance. DC output distribution is included for
circuit breakers or GMT style fuses or in the 100-A versions, a combination of both. Available
circuit breakers are 30 A or 60 A. GMT fuses can be 1/4 to15 A. A low voltage disconnect
(LVD) is provided to disconnect the battery after deep discharge. A 50-ampere power system is
shown in Figure 2.1-1. A block diagram of a typical 100-ampere power system with fuses and
breakers is shown in Figure 2.2-1.
2.2. How to Use This Manual
Each section of this manual can be read in any order and provides a complete explanation of
the subject described by the title. However, the sequence of the sections is designed to provide
a typical step-by-step process for successful use of the equipment.