WARNING: The MX28B DC power plant is supplied from a nominal 220VAC, 60 Hz source. Keep the AC input enclosure in place when the system is operational or energized.
3.4. Battery Connections
WARNING: Hazardous energy levels are present on bare conductors in the
∙Any jewelry, rings or watches be removed while working on this equipment.
∙Handles of all wrenches, screwdrivers, cutters and pliers be insulated.
∙Shafts of screwdrivers be wrapped in electrical tape or otherwise insulated
Planning the Battery installation
The battery cable(s) should be sized sufficiently large to limit the voltage drop from the MX28B 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.
An external fuse or circuit breaker (various options are available from APC) is required in the negative line (located at the battery end) to protect the cables from the battery to the MX28B DC power plant. 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 Model MX28B DC power plant. Incorrect connection could cause severe equipment damage.
The battery cable connections are located at the top rear of the unit as shown in Figure
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