Re: How to clean up mains power?

w_tom wrote:
On Aug 16, 4:09 pm, fl_fly_...@xxxxxxxxx wrote:
On Aug 16, 1:52 pm, w_tom <w_t...@xxxxxxx> wrote:
Recently, a neighborhood suffered what may have been a 33k or 69k
volt transmission line falling on their distribution. Hundreds of
electric meters were literally exploded from their bases. Many meters
were found in pieces 30 feet away. Many homeowners lost computers,
stereos, TVs, and plug-in protectors. My friend had no plug-in
protectors, one properly earthed 'whole house' protector, AND no
damage - except to his meter.
love to see the newspaper article or news film clips on this one
tom_w, sound like the forest fire i put out with the water hose on the
side of my house.

Apparently fl_fly_boy has no experience and knows only from
speculation. His knowledge is proved by mocking? fl_fly_boy
demonstrates how one with a 'doctorate awarded by retail store
shelves' knows so much. Why would meters damaged by 33K or 69K volts
result in news reports? This type event typically gets zero new
coverage - as fl_fly_boy would know if he had experience.

Exploding utility meters would certainly make the news in my non-podunk town. Apparently it happens all the time in w_'s town, where w_ designs electrical systems.


A homeowner that had a properly earthed a 'whole house' protector
had no damage - as expected. Others with plug-in protector had
appliance damage AND destroyed plug-in protectors. The homeowner has
a 'whole house' protector that remained operational because he did not
waste money on grossly undersized plug-in protectors.


It is well know that overvoltage will rapidly destroy MOVs. Provide an explanation for how service panel suppressors survived 33kV, at an easy 1 second duration.

I provided a *link* to Jerry Pournelle, a reliable source, who reported that most of his equipment connected to plug-in suppressors survived a cross to high voltage. His equipment connected to a UPS not only survived, it kept functioning.


You forgot the link to a source that says plug-in suppressors do NOT work.

You also forgot to answer:
- Why do the only 2 examples of protection in the IEEE guide use plug-in suppressors?
- Why does the NIST guide says plug-in suppressors are "the easiest solution"?
- How would a service panel suppressor provide any protection in the IEEE example, pdf page 42?
- Why does SquareD say in addition to their "whole house" suppressors "electronic equipment may need additional protection" from plug-in suppressors.
- Why do SquareD "whole house" suppressors not have those critical numbers for "each type of surge"?
– Where is your source that HDTVs “must” work at 95V?


--
bud--
.

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