CHAPTER 8
Power Cabling
This chapter describes how to connect -48 VDC power feeds to the Power Filter Units (PFUs) on the ASR
5500 chassis.
The -48 VDC Battery Return (BR) input terminals to the PFUs are not connected to the equipment frame
(chassis) are treated as Isolated DC returns (DC-I) in compliance with GR-1089-CORE (sec.9.8.3).
Important
This chapter includes the following sections:
•
Power Considerations, page 77
•
Internal Power Planes, page 78
•
Power Cable Requirements, page 81
•
Connect Power Feeds to the PFUs, page 83
Power Considerations
Each chassis supports up to eight -48 VDC, 80-amp power feeds, four per PFU. Each feed consists of a supply
and return cable.
The power source must be a UL/CSA listed device with a regulated output no greater than -60VDC.Important
Typically, the DC power feeds are fed from a power distribution frame (PDF) to a power distribution panel
(PDP) at the rack.
The DC power Battery Return (BR) or positive terminal, must be grounded at the source end (power feed
or mains power end).
Important
ASR 5500 Installation Guide
77
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