Selecting A Ups; Calculating Amperage Requirements; Ups Transition Time; Applicable Industry Standards - Extreme Networks BlackDiamond 8810 Hardware Installation Manual

Site Preparation

Selecting a UPS

To determine UPS requirements for your switch, ask these questions:
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.

Calculating Amperage Requirements

To determine the size of UPS that you need, use the following procedure:
1 To find Volt-Amps (VA), 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. Then
multiply the numbers together to get VA:
VA = Volts x Amperes
2 Add the VA from each piece of equipment together to find the total VA requirement.
To determine the minimum amperage requirements for your UPS, we recommend that you add 30%
to the total.

UPS Transition Time

Transition time is the time that is necessary for the UPS to transfer from utility power to full-load
battery power. For Extreme Networks products, a transition time of less than 20 milliseconds is required
for optimum performance.

Applicable Industry Standards

For more information, see the following ANSI/TIA/EIA standards:
ANSI/TIA/EIA-568-A—discusses the six subsystems of a structured cabling system.
ANSI/TIA/EIA-569-A—discusses design considerations.
ANSI/TIA/EIA-606—discusses cabling system administration.
ANSI/TIA/EIA-607—discusses commercial building grounding and bonding requirements.
You can access these standards at:
http://www.ansi.org
or
http://www.tiaonline.org
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