Connecting A 3.5-Kw Hvac/Hvdc Power Supply To Ac Power Sources - Cisco Nexus 7718 Hardware Installation Manual

Installing or Replacing Modules, Fan Trays, and Power Supplies
• The AC power sources are rated as follows:
• The power supply is already installed in the chassis.
• The chassis is connected to an earth ground.
Procedure
Step 1 Ensure that the power supply switch located on the front of the power supply is set at standby (labeled as 0).
Step 2
Plug one AC power cable into the power supply, and pull down the retention clip over the plug on the power
cable.
Step 3 Plug the other end of the power cable into a AC power source supplied by the data center.
Note
Warning
Statement 1018
Warning
250V, 20 A
Statement 1005
Step 4
Turn the power supply switch from standby to on (from 0 to 1 as labeled on the power switch).
Step 5 Verify that the power supply is receiving AC power and outputting DC power by making sure that the INPUT
and OUTPUT power supply LEDs are lit and the FAULT LED is not lit or flashing. For an explanation of all
the power supply LEDs and the conditions that they indicate, see
Note
If the Fault LED is flashing red, turn the power switch to standby (labeled as 0), check the AC power
connections on the power supply and the AC power source, and then turn the power switch back on (labeled
as 1). The Input and Output LEDs for the connected power supplies should be green and the Fault LED should
be off.

Connecting a 3.5-kW HVAC/HVDC Power Supply to AC Power Sources

You use one power cord to connect a 3.5-kW HVAC/HVDC power supply to its AC power source and to
ground the power supply. Depending on the power mode that you use for the switch, you either connect all
OL-30453-01
◦Full redundancy—Two AC power sources
◦For North American installations—20A with 110V or 220V circuits.
◦For international installations—size the circuits by local and national standards.
If you are using the combined power mode or power supply redundancy, you connect the power
cables to the same 20-A circuit. If you are using the input source redundancy mode or full redundancy
mode, you connect half of the power cables to one AC power source and the other half to another
AC power source.
Take care when connecting units to the supply circuit so that wiring is not overloaded.
This product relies on the building's installation for short-circuit (overcurrent) protection. Ensure
that the protective device is rated not greater than:
When you first activate the power supply, you can verify the functionality of the LEDs by checking
that each LED turns on for a couple of seconds.
Cisco Nexus 7718 Switch Site Preparation and Hardware Installation Guide
Connecting a 3.5-kW HVAC/HVDC Power Supply to AC Power Sources
Power Supply LEDs
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