Introduction to the Power Distribution System

Devices support both AC and DC power supplies.

• AC power supply mode: Under normal conditions, uninterruptible power supply (UPS) obtains three-phase 380 V AC power input from a mains power outlet and transmits 380 V AC power to an AC power distribution frame. A chassis receives power from the AC power distribution frame through the power distribution unit (PDU) installed in the cabinet.
  Figure 1 AC power supply mode
  

• High-voltage (240 V) DC power supply mode: Under normal conditions, a rectifier system obtains three-phase 380 V AC power input from a mains power outlet and transmits 240 V DC power to a DC power distribution frame. A chassis receives power from the DC power distribution frame through the PDU installed in the cabinet/rack.
  Figure 2 High-voltage (240 V) DC power supply mode
  
• DC power supply mode: Under normal conditions, a rectifier system receives three-phase 380 V AC power input from a mains power outlet and transmits -48 V DC power to a DC power distribution frame. The device obtains power from the DC power distribution frame.
  Figure 3 DC power supply mode