Uninterruptible Power Supply Requirements - Extreme Networks BlackDiamond X8 Series Hardware Installation Manual

Uninterruptible Power Supply Requirements

An uninterruptible power supply (UPS) is a device that sits between a power supply (such as a wall
outlet) and a device (such as a switch) to prevent outages, sags, surges, and bad harmonics from
adversely affecting the performance of the device.
A UPS traditionally can perform the following functions:
•
Absorb relatively small power surges.
•
Smooth out noisy power sources.
•
Continue to provide power to equipment during line sags.
•
Provide power for some time after a blackout has occurred.
In addition, some UPS or UPS plus software combinations provide the following functions:
•
Automatically shut down equipment during long power outages.
•
Monitor and log power supply status.
•
Display the voltage (current draw) of the equipment.
•
Restart equipment after a long power outage.
•
Display the voltage currently on the line.
•
Provide alarms on certain error conditions.
•
Provide short circuit protection.
Select a UPS
Select a UPS that meets your requirements:
•
What are the amperage requirements?
•
What is the longest potential time period that the UPS would be required to supply backup power?
•
Where will the UPS be installed?
•
What is the maximum transition time that your installation will allow?
Note
Extreme Networks recommends that you use a UPS that provides online protection.
Calculate Volt-Amperage Requirements
Calculate Volt-Amperage Requirements
Building and electrical codes vary depending on your location.
1 Locate the voltage and amperage requirements for each piece of equipment.
These numbers are usually located on a sticker on the back or bottom of your equipment.
2 Multiply the numbers together to get Volt-Amperes (VA).
VA = Volts x Amperes
3 Add the VA from all the pieces of equipment together to find the total VA requirement.
4 Add 30% to the total (recommended by Extreme Networks)to determine the minimum volt-
amperage requirements for your UPS.
BlackDiamond X8 Series Switches Hardware Installation Manual
Site Preparation
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