When I lived in Ga there was a small substation, a subsub station if
you will behind the place I worked. This substation fed an industrial
park and quite a large residential area.When lightning hit one of the
transformers there it blew and so did one of the transformers that fed
where I worked, we had three for three phase power. Power was out in a
patchwork all over the residential area and 3 or four other
transformers also blew up scattered around the subdivision. On one
road in particular you could tell that every third street off the road
was without power.
I do remember one power outage (of many) at my workplace where some
strange noises emanated, and the only incandescent light at the workplace
glowed to an extent typical of about 16 volts. I had a voltmeter handy
and it indicated about 40 volts. So I suspect a bunch of noise from UPS
units and a few generators, plus maybe a bit of RF pickup from the many
nearby radio transmitters. This was in the University City section of
Philadelphia, in an urban zip code (19144) having 4 hospitals for people
and 1 for animals.
That power outage did not damage anything.
A few or several months before that was the power "outage" where for the
first 45 minutes or hour or so (I disclaim accurate memory of amount of
time of the following stressful condition), the voltage was about 45
volts. I did not have a voltmeter handy. The only incandescent lamp at
the shop glowed to an extent that I consider typical of about 45 volts.
The fluorescent fixtures (with electronic ballasts) gave an eerie very dim
glow. Two refrigeration devices had compressor motors being burnt out.
Someone I know suggests that a transformer upstream from my shop
could have a 13,200 volt primary with a 4,600 volt tap, and the 4,600 volt
feeding power got switched to the 13,200 volt primary connection as a
result of an overload.
The overload could be from rich college kids having 42 inch plasma TVs
and refrigerators for beer in most bedrooms and most living rooms and 300
watt halogen torchiere lamps almost everywhere and computers running in
most bedrooms. I say "have the flashlights handy" when the weather gets
warm enough to need air conditioning during the "school year" to remove
the heat produced by all those beer cooling refrigerators, 42 inch plasma
TVs and 300 watt halogen lamps that my workplace's neighbors have!
Not a great example: TVs don't use that much juice, nor do computers.
300-watt torchieres could add up to something significant pretty quickly
(my term for those lamps is "firestarters").
I probably use more power than your neighbors, as I have an electric
water heater (small one, 20 gal.) and an electric dryer. (But no air
conditioner, thank you.)
Made From Pears: Pretty good chance that the product is at least
For same screen area, CRT uses the most power, plasma uses a little
less, and LCD uses the least. Plasma TVs are big power consumers by
generally being made in larger sizes.
- Don Klipstein ( firstname.lastname@example.org)
On Tue, 31 Mar 2009 07:24:12 +0000 (UTC), email@example.com (Don
The difference between LCD and Plasma is subjective.
AN LSC screen draws constant power while a Plasma draws varying power
depending on the screen contents. Highest draw is all white screen
(means all cells fired) while minimum draw is with black sctreen (no
Actual AVERAGE power use is very similar for equal sized screens - and
something just over half an equivalent CRT.
Remember also, Plasma is 42" and above (perhaps a few 37") while CRT
generally maxes out ar 42" and LCD can go from 2" to 60 or more. So
particularly with Plasma, the power is directly related to size, while
less so with CRT and LCD.
There is something that a lot of folks don't realize as
having detrimental effects on the power grid and the
power distribution of homes and business. This has developed
under our noses and most people never considered it.
Asymmetrical loads from switching power supplies can damage
older power transformers that were not designed to handle
the harmonics produced by modern electronic equipment. It's
hard to explain it to a lot of electricians because many of
them have no electronics background. I found a link to a
site with a lot of good information on the problem.
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