Thegrounding methods for the DC-powered system are more complex than that of an AC-powered system.
Typical Power and Ground for a DC-Powered Cabinet shows a typical power and ground layout for a DC-powered cabinet. The size of the wire required for the -48 volt DC and -48 volt return must ensure the voltage supplied by the battery plant is maintained between -42.5 and -54.2 volts DC at all times for proper operation and to prevent hardware damage. The wire must be sized for a maximum voltage drop of 0.5 VDC in each leg of the DC distribution. This procedure applies to both PPN and EPN cabinets.
Task List: Connect DC Power and Ground
Perform these tasks to connect DC power and ground, power distribution unit (J58890CH-1 Only):
- Install Rectifier Modules and Battery Interface Unit
- Connect Power and Ground(s)
Perform these tasks to connect DC Power and Ground (J58890CF Only):
