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An
outlet strip is sometimes miscalled a surge protector, but
provides no such protection. Make sure you know the difference when
you purchase one. When you repair or buy a new computer system, you'll need a good
surge suppressor and should consider a new
Uninterruptible Power
Supply (UPS) as well .
You can plug multiple items into one power outlet of a
surge suppressor. With all of the different components that make up
a computer system, this is definitely a useful piece of equipment.
You should mark the date it was purchased , they get
worn after several hits and should be replaced at least every few
years. You will know when it received a hit because you will have to
press the reset button to get it working again. If you
have a modem in your computer then find a power strip that also has
telephone line protection. Considerations
- Provides a row of
power outlets and on/off switch that protects from over voltages
on AC power lines and telephone lines
-
Shunt type absorbs surge.
- Series type blocks
surge from flowing
- Measured by
clamping voltage, the amount of energy it can absorb
-
Joules like a diamond the higher the rating the better.
Important
Specifications
Here are some specifications which are critical to understand
when choosing a surge protector.
- Clamping voltage - This says what voltage will cause the
metal oxide
varistors (MOVs) to conduct electricity to the ground line. A
lower clamping voltage indicates better protection. There are
three levels of protection in the UL rating -- 330 V, 400 V and
500 V. For most purposes, a clamping voltage more than 400 V is
too high.
- Energy absorption/dissipation - This rating, given in
joules, says how much energy the surge protector can absorb before
it fails. A higher number indicates greater protection. Look for a
protector that is at least rated at 200 to 400 joules. For better
protection, look for a rating of 600 joules or more.
- Response time - Surge protectors don't kick in
immediately; there is a slight delay as they respond to the power
surge. A longer response time says your computer (or other
equipment) will be exposed to the surge for a greater amount of
time. Look for a surge protector that responds in less than one
nanosecond.
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