The powers supply system supports four -48 V/-60 V DC power inputs for mutual backup in 8800 subrack. The power supply system adopts the switched-mode power supply mode for two areas, that is, the white-slot area and the black-slot area, as shown in Figure.

 

Rated working current: 100 A (two 50 A switched-mode power supplies)

 

Each area is configured with a pair of power supplies of mutual backup: one pair is IU39 and IU45, and the other pair is IU40 and IU46. The normal operation of the equipment is not affected in the case of failure of any external input -48 V/-60V power supply. Figure shows the two pairs of power supplies of mutual backup.

very helpful for an on-field engineer. This comes to help, when there is electrical power issue on-site.