What is a surge?
A "surge" is a boost in electrical charge in a power line. This can
be caused by lightning, but is more commonly caused by high-power
electrical equipment like air conditioners and refrigerators
which require more energy for starting and stopping compressors and
motors. In addition, some surges can be caused by faulty wiring.
Why is surge suppression needed?
Suppression is necessary because today's electronic devices are much more sensitive and expensive.
Also, telephone and cable
lines can conduct high voltage and need surge suppression as
well.
How to select the right surge suppressor
Generally, you get what you pay for because not all surge suppressors
are the same. Look for a quality product and a system
that balances price with the cost of losing electronic equipment or data. Here are a few important
things to look for:
-
Get a surge protector that states it is a
"transient voltage surge suppressor" and meets criteria for UL
1449. (Some products look like a surge protector but are no more
than extension cords.)
-
Get a clamping voltage of 400V or less,
the
lower the better.
-
Look for a joule rating of at least 200 to
400 minimum.
-
Buy a surge
suppressor with an indicator
light that tells you the protection components are functioning.
-
Better surge protectors come with a
guarantee on performance backed by an insurance guarantee on
your equipment.
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