APC VS 50 User Manual

Magnum VS –48 Vdc User’s Manual 

                                     

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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. 
 

 
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.