Converting 3-Phase Ac To Single-Phase Ac - Cisco CRS-1 Site Planning Manual

AC Power Systems
Figure 2-16
E
The AS 3112 standard rates cord sets up to a maximum of 15 A, 250 VAC for the C-21 plug. Therefore
Note
the building circuit breaker must be 15 A maximum. Installation of the Cisco CRS 8-slot line card
chassis must follow national and local electrical codes.

Converting 3-Phase AC to Single-Phase AC

If you have 3-phase AC Delta or AC Wye input power at your equipment, a Cisco CRS 3-phase AC PDU
will be required to convert 3-phase AC Delta or AC Wye input power to single-phase AC input power
that connects directly to the rear of the modular configuration AC power shelf. The Cisco CRS PDU
includes either an AC Delta or AC Wye power interface, and has power input and power output cords
entering and exiting the box.
In addition to the requirements in the
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Cisco CRS Carrier Routing System 8-Slot Line Card Chassis Site Planning Guide
2-18
Australia—Modular Configuration AC-Input Power Cord
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15A 250V~
AS 3112
2-2, AC input power requirements are as follows:
Two separate and independent AC power sources are required, one for each PDU. Each PDU should
be connected to a different power source to provide 2N power redundancy in case a power source
fails.
Each AC power source must provide 3-phase VAC power, and have its own circuit breaker.
AC Delta input:
– 3-phase, 200 to 240 VAC (phase-to-phase), 50 to 60 Hz.
Input current: 27.7 A.
–
Delta input power cord has a 4-pin IEC 60309 plug (3 wire + protective earthing [3W+PE]).
–
The power cord is rated for 250 VAC, 60 A, and plugs into a similarly rated IEC 60309
receptacle.
– Each single PDU has three single phase output cords, each with a 90 degree IEC-320-C21 plug
that plugs into a IEC-320-C22 inlet on the rear of the modular configuration AC power shelf.
AC Wye input:
3-phase, 200 to 240 VAC (phase-to-neutral), 50 to 60 Hz.
–
– Input current: 16 A (International) or 20 A (North America). The PDU is rated for 16-amp service.
"General Power and Grounding Requirements" section on
Chapter 2 Power and Cooling
E
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16A 250V~
IEC-320-C21
OL-5802-09