Cisco Systems CRS-1 manual AC PDU Wiring, AC Delta 3-Phase Wiring

Chapter 2 Power and Cooling

AC Power Requirements

Figure 2-4 AC Wye Power Cord Plug

To AC outlet

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Figure 2-5 AC Delta Power Cord Plug

To AC outlet

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For detailed AC power specifications, see the “Line Card Chassis Specifications” section on page 3-1. In addition, the next section “AC PDU Wiring” describes the 3-phase wiring for AC Delta and Wye configurations.

AC PDU Wiring

This section contains a brief description of the 3-phase wiring for AC Delta and Wye configurations that facilities electricians should understand.

AC Delta and AC Wye are both basically 200 to 240 VAC input power:

•AC Delta 3-phase wiring is typically used in the United States, Japan, and other countries where the phase-to-neutral voltage is approximately 120 VAC and 208 VAC phase to phase.

•AC Wye 3-phase wiring is typically used in Europe and countries where each phase-to-neutral voltage is approximately 220 VAC.

AC Delta 3-Phase Wiring

Figure 2-6shows a PDU wired for AC Delta 3-phase power. As shown, input AC power is routed to three internal 2.5-kW power modules in the rectifier, where it is converted into DC power (nominal 54.5 VDC, 46 ADC) and routed to the three load zones of the chassis.

The AC Delta PDU is shipped with a 14-foot (4.3 m) AC power cord with a 4-pin L15-30P plug.

Cisco CRS-1 Carrier Routing System 8-Slot Line Card Chassis Site Planning Guide

OL-5802-06 2-7