 |
 |
|
|
Understanding
uninterruptible power supply devices and how to choose the right one for your needs.
What is an uninterruptible power supply?
An uninterruptible power supply (UPS) is a device that protects equipment such as computers,
modems and fax machines from variances in voltage. This device provides protection
from voltage sags and power interruptions.
Standby UPS
Line-interactive UPS
- For home offices and businesses that require longer protection from power disturbances and additional power conditioning. You can purchase PGE’s line interactive UPS model, ES800C, in our small business Surge and Power Back-up Products section.
Selecting the right UPS device
Consider a UPS as an inexpensive way to provide backup power to computers and office equipment
when an interruption in utility power occurs. UPS devices for home applications are “plug and play.”
That is, you can install them yourself.
To make sure you get the right size UPS with the options you need, look for products that meet these
specifications.
- UL 1778 listed
Conforms to Underwriter Laboratory’s standard UL 1778.
- Size
Depending on your equipment protection needs, you could use a 450 VA UPS to protect one computer and a monitor. A 650 VA UPS should
be considered the minimum size needed to protect a file server. For answers to questions
about sizing up your home needs, call the Power Quality Hotline at 503-736-5750
or 800-270-7016, or e-mail us.
Available options for line-interactive UPS devices
- UPS performance monitoring
Feature that constantly checks device is operational.
- Automatic network shutdown software
Shuts down all open computer applications so no data is lost.
- Extensions for battery run time
Some UPS devices offer extensions for a longer battery run time (how long the UPS can support equipment on its battery).
- Systems interface
Capability to activate alarms or communication when an outage occurs.
Common questions about UPS devices
Q. How does a UPS work?
- When there is an interruption of power, a UPS converts battery power to the AC power needed to
operate equipment. It does this with an electronic circuit called an inverter.
Q. How long can a UPS provide power from its battery?
- It depends on the size of the UPS, the size of the battery and the
connected equipment. Usually, they can support equipment for 10 to 20 minutes.
Q. How do I know when my battery power is low?
- Usually, the UPS device starts “beeping” when the battery is low.
Higher-end UPS devices now come with a software package that will alert you when the battery reaches such status.
Q. Why are there different types of UPS devices?
- All UPS types provide power interruption protection, but line-interactive can provide continuous power conditioning.
Q. How much should I plan on investing in a UPS?
- A basic UPS starts at about $120, while the more performance-oriented devices can run up to $2,000.
For more information, contact an electrical contractor, PGE’s
Power Quality Hotline
at 503-736-5750 or 800-270-7016, or
e-mail us.
|
|
