Riding the Lightning
So, now that we know the requirements of a true
surge/spike protector, we can now go shopping for the
one that is right for our needs. What would you buy
Brent? Glad you asked! I have purchased and only
recommend SurgeX. Why? The SurgeX surge protection
technology was designed to handle the indirect surges,
and this technology has been verified by UL for 1000
such surges. The odds of you using this unit up are
nil, unless you live in Tampa, FL, in the highest
unprotected structure in town.
SurgeX uses Series Mode surge suppression. They act
first as low pass filter, blocking the high-frequency
components of surges. The remaining low-frequency
surge energy is stored in capacitors, for the duration
of the event. Then it is slowly discharged back
across the incoming hot and neutral conductors without
involving any connection to equipment ground. SurgeX
units can be placed anywhere along a power circuit
without the ground reference elevation disadvantage of
Shunt Mode surge protection devices.
All other manufacturers use Metal Oxide Varistors
(MOV's). These are the main components that divert
incoming surge energy into the equipment ground. In
all Shunt Mode surge suppressors, they have a "fixed
clamping voltage" characteristic, above which they
rapidly change from virtual open circuits into low
resistance conductors. For a transient surge duration
of not more than a few milliseconds, the resulting
power dissipation in MOV's can be tolerated. In the
event of a continuous surge of any significant
duration, MOV's rapidly heat up and then either
permanently revert to their non-conductive state, or
fail, possibly catching fire.
No matter who makes it, or how much they cost, the
sacrificial effect of repeated surges over time will
ultimately cause MOV's to fail one way or the other.
Recent MOV-based surge suppressor devices made to
Underwriters Laboratories (UL) 1449-2 (2nd ed.)
specifications incorporate a fuse element which
disconnects the power in the event of catastrophic MOV
failure. Older MOV-based devices do not have this
feature, however, and non-catastrophic MOV failure
leaves the attached equipment completely unprotected,
usually without the knowledge of the owner! To ensure
continuously safe operation, MOV-based surge
protection devices should be tested on a regular
basis.
Why buy any other unit than a SurgeX? Glad you asked.
SurgeX is the only company that does not use
radial-lead MOVs, that does not contaminate the
ground, does not have to switch on, and last but not
least, does not need to be tested. I would encourage
you to protect yourself, in storm season and out of
storm season with a SurgeX.
Brent Handy
HA! Handy Audio!
918-664-4952
www.homepage.mac.com/brenthandy/
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