General power and grounding requirements – Cisco CRS-1 User Manual
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Cisco CRS Carrier Routing System 8-Slot Line Card Chassis Site Planning Guide
OL-5802-09
Chapter 2 Power and Cooling
General Power and Grounding Requirements
Note
In a fixed configuration AC or DC power system, PDU refers to the power component that connects to
the AC rectifier or DC PEM.
Note
In a modular configuration AC power system, PDU refers to the Cisco CRS 3-phase AC PDU that
converts 3-phase AC-Wye or AC-Delta input power to single-phase AC input power for the modular
configuration AC power shelf. For further information, refer to .
Fixed configuration chassis input power requirements are as follows:
•
DC-powered chassis requires up to a maximum of 8,000 watts (8.0 kW) of DC input power when
the chassis is fully loaded.
•
AC-powered chassis requires up to a maximum of 8,500 watts (8.5 kW) of AC input power when
the chassis is fully loaded.
Modular configuration chassis input power requirements are as follows:
•
DC-powered chassis requires up to a maximum of 9,500 watts (9.5 kW) of DC input power when
the chassis is fully loaded.
•
AC-powered chassis requires up to a maximum of 9,800 watts (9.8 kW) of AC input power when
the chassis is fully loaded.
Note
If you have a Cisco CRS 3-phase AC PDU installed, three AC PMs are required to be installed in each
modular configuration AC power shelf to maintain a balanced 3-phase power load.
Note
These power requirements are for a fully loaded chassis with eight PLIMs. A chassis with six or
seven PLIMs uses slightly less power. However, it is a good idea to allocate this much power for each
chassis to ensure that enough power is available for future system expansion.
See Cisco CRS Carrier Routing System 8-Slot Line Card Chassis System Description for detailed
information about how each power system operates and distributes power to components in the chassis.
General Power and Grounding Requirements
This section describes the power and grounding requirements you must consider when planning the site
facilities for the routing system. In addition, see the
“DC Power Systems” section on page 2-5
or the
Power Systems” section on page 2-11
for additional information about the power requirements for your
chassis type.
Note
A qualified electrician should review the information in these sections to ensure that the installation site
meets these requirements. For larger system configurations, consult a facilities electrical expert to
understand the load that the routing system may put on the facility power plant.