3.4. Battery Connections
WARNING: Hazardous energy levels are present on bare conductors in the +24Vdc 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 that:
•Any jewelry, rings or watches be removed while working on this equipment.
•Handles of all wrenches, screwdrivers, cutters and pliers should be insulated.
Planning the Battery installation
The battery cable(s) should be sized sufficiently large to limit the voltage drop from the 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 recommended in the positive line (located at the battery end) to protect the cables from the battery to the 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 power plant. Incorrect connection could cause severe equipment damage.
The battery cable connections are located at the top left rear of the unit as shown in Figure
Figure 3.4-1 Battery Cable Connection Locations
MX28B400 +24 VDC User’s Manual | Page 7 |