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The Transient Times
Your Surge Suppression News and Commentary |
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Do I protect
at the main-incoming service or at the equipment??
From the IEEE
Emerald Book:
8.6
Premise electrical system surge protection
Large transients on the power system are best
initially diverted at the service entrance of a facility.
Transients generated within the premises can best be diverted by
surge protective devices located close to the internal source of
the transients, or close to the electronic load equipment. Best
results are obtained if both locations are protected.
In addition to surge protective devices
installed in the service entrance equipment, it is recommended
that additional surge protective devices of listed Category "B" or
Category "A," as specified in IEEE Std C62.41-1991, be applied to
downstream electrical switchboards and panel boards, and panel
boards on the secondary of separately derived systems if they
support communications, information technology equipment,
signaling, television, or other form of electronic load equipment. |
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Nov. 30, 2003 |
Williamsport Municipal Water Authority
Williamsport, PA |
Some of our equipment was being repaired frequently because of
damage from surges, so your units were installed covering
computer panels, pumps, instrumentation communications and
telephone lines, branch panels, as well as the service
entrance panel.
.....The suppressors you
recommended have also reduced the downtime on
our equipment, and we know we will be protected during the
storm season. |
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Mar. 19, 2004 |
Florida Hospital
Orlando, FL |
Given the nature of the healthcare industry, reliable
operation of equipment is not just an economic issue. But,
being a business, it is important to obtain a quick pay back
on all investments. I estimate that our payback period is less
than a year. |
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June 12, 2002 |
Quebecor World
Concord, ON, Canada |
We were having numerous problems with our splicer,
specifically Programmable Logic Controllers (PLC's) locking
up, drives literally blowing up (grenading) which would shut
down the press for an hour to two hours each time at a cost of
$750.00 per hour. The cost of repair was approximately
$15,000. .....We haven't had
any downtime since we installed the suppressors and we
log all downtime on the press. |
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