Extreme Networks ExtremeSwitching 5320 Series User Manual

• Display the voltage currently on the line.
• Provide alarms on certain error conditions.
• Provide short-circuit protection.
Select a UPS
To determine UPS requirements for your switch, answer 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 the installation will allow? (See Provide a
Suitable UPS Transition Time on page 39.)
Note
Use a UPS that provides online protection.
Calculate Volt-Amperage Requirements
About This Task
To determine the size of UPS that you need:
Procedure
1. Locate the voltage and amperage requirements for each piece of equipment.
These numbers are usually found 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 nd the total VA
requirement.
To determine the minimum volt-amperage requirements for your UPS, add 30% to
the total.
Provide a Suitable UPS Transition Time
UPS transition time is the time required for the UPS to change from providing AC
power derived from the utility (or mains) supply to providing AC power derived from
the battery backup. UPS transition time is sometimes called UPS transfer time .
UPS transition times vary between UPS models and implementations, but shorter
transition times are preferred. For Extreme Networks stacking products, a UPS
transition time of 20 milliseconds or less ensures optimum performance and minimizes
service interruptions.
For high-availability and fault-tolerant installations in which the switches use
redundant power supply units (PSUs), ensure that each PSU in a switch is connected
to a different UPS and that each UPS is powered by an independent AC supply. This
will prevent service interruptions when a power source is lost, or when a UPS unit
Site Preparation UPS (Uninterruptible Power Supply) Requirements
ExtremeSwitching 5320 Series Hardware Installation Guide 39

Extreme Networks ExtremeSwitching 5320 Series Specifications

General

Brand	Extreme Networks
Model	ExtremeSwitching 5320 Series
Category	Switch
Language	English