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Magnum VS –48 Vdc User Manual Page 12
2.4. Battery Connections
WARNING: Hazardous energy levels are present on bare conductors in the DC distribution
connection area of the plant. Accidental shorting of distribution conductors can cause
arcing and high currents that can cause serious burns or other physical harm. It is
recommended to:
Remove any jewelry, rings, or watches while working on this equipment.
• Use insulated wrenches, screwdrivers, cutters, pliers and other tools.
WARNING: Rectifier output DC circuits will be damaged if the batteries are installed
incorrectly. Ensure proper battery polarity and that the battery is isolated from the rest
of the system.
Planning the Battery installation
The battery cable(s) should be sized to limit the voltage drop from the dc power plant to the battery during charging
per system design requirements. The cable(s) must also carry the full load current during battery operation. If
assistance is required to determine the necessary cables for the application, contact your sales representative or
APC (Refer to Section Error! Reference source not found. for APC Customer Support information). A fuse or
circuit breaker (various options are available from APC) is recommended in the negative line to protect the cables
from the battery to the DC power plant. If a circuit breaker is used, the power plant can monitor auxiliary contacts
from this breaker.
Connecting the Cables
WARNING: Make certain that the battery polarity is correct when making connections
to the DC power plant. Incorrect connections can cause severe equipment damage.
The battery cable connections are located at the rear of the unit as shown in Figure 2.4-1. The battery positive and
battery negative buses each provide a pair of #10-32 studs on 5/8” centers for connecting two-hole battery cable
lugs. A ring size of 6 mm may also be used. Connect the battery cables as applicable using #10-32 nuts. Cover
connections with heat shrink after assembly.
Battery Negative
Connection
Battery Return
Connection