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Topic: Power line

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	Electric power transmission - Wikipedia, the free encyclopedia
		Typically, power transmission is between the power plant and a substation near a populated area.
		Redundant paths and lines are provided so that power can be routed from any power plant to any load center, through a variety of routes, based on the economics of the transmission path and the cost of power.
		The fraction of total energy flow (power) which is resistive (as opposed to reactive) power is the power factor.
	en.wikipedia.org /wiki/Power_line (2501 words)

	Power line communication - Wikipedia, the free encyclopedia
		Power line communication (PLC), also called Mains Communication or Power Line Telecoms (PLT) or Powerband, is a wireline technology that is able to use the current electricity networks for data and voice transmission.
		As power lines are typically untwisted and unshielded, they are essentially large antennas, and will broadcast large amounts of radio energy (see the American Radio Relay League's article).
		One natural application of narrow band power line communication is the control and telemetry of electrical equipment such as meters, switches, heaters and domestic appliances.
	en.wikipedia.org /wiki/Power_line_communication (2934 words)

	Power Lines and Cancer (Site not responding. Last check: 2007-10-20)
		The reduction in magnetic fields for underground lines is not due to shielding, and the reduction in magnetic fields from burying a line is greatest at a distance from the line.
		The original studies which suggested an association between power lines and childhood cancer used a combination of the type of wiring and the distance to the residence as a surrogate measure of exposure, a system called "wire codes" [C1, C3, C6].
		Wire codes: The original US power line studies used a combination of the type of wiring (distribution vs transmission, number and thickness of wires) and the distance from the wiring to the residence as a surrogate measure of exposure [C1, C2, C3, C6, C7, C12, C29, C30, C36, C45, C46, C47].
	www.mcw.edu /gcrc/cop/powerlines-cancer-FAQ/toc.html (17382 words)

	Power Line Health Blog
		Because of health concerns, the Uganda power company has concluded that, starting April 6, it may demolish all structures constructed under high voltage (66 and 132kv) transmission power lines and those structures within a radius of 15 meters from the center of the lines.
		The Minnesota Power Company GTE is refusing to build a 65,000 kv power line next to an existing line on the grounds that the new line would come within 80 feet of houses.
		Georgia Transmission Corp., which installs power lines for the state's 39 electric membership cooperatives, said the planned 230 KV lines are needed in the county to keep pace with population growth and economic development.
	www.deadly.blogspot.com (12318 words)

	Howstuffworks "How Power Grids Work"
		Electrical power is a little bit like the air you breathe: You don't really think about it until it is missing.
		It is only during a power failure, when you walk into a dark room and instinctively hit the useless light switch, that you realize how important power is in your daily life.
		Your brain likely ignores all of the power lines because it has seen them so often.
	www.howstuffworks.com /power.htm (223 words)

	Line installers and repairers
		All line installers, or line erectors, install new lines by constructing utility poles, towers, and underground trenches to carry the wires and cables.
		Entry-level line installers may be hired as ground workers, helpers, or tree trimmers, who clear branches from telephone and power lines.
		Overall employment of line installers and repairers is expected to grow more slowly than the average for all occupations through 2014.
	www.bls.gov /oco/ocos195.htm (2099 words)

	Power Line Disturbances (Site not responding. Last check: 2007-10-20)
		Major metropolitan areas of the Country (where most of us dwell) are headed for a growing number of power related problems (as their populations increase) with significant increases in both frequency and severity of power line disturbances.
		Noise on the A/C line can manifest itself in the form of "clicks" and "pops" or, more detrimentally, as subtle distortions that veil the music, adding the equivalent of "sonic grunge." Visual artifacts are many and varies.
		The power output of your amplifier is directly dependent upon line voltage.
	www.gcaudio.com /resources/howtos/powerlinedist.html (1531 words)

	Wave Report \| Broadband Power Line Tutorial
		Advances in processing power enable new BPL modem chips to overcome difficulties in sending communications signals over the electric power lines that could not be overcome with less computing power.
		Medium voltage power lines are the electric lines that you see at the top of electric utility poles beside the roadways in areas that do not have underground electric service.
		A major challenge is how to deliver the signal from the medium voltage line to the low voltage line that enters your house, because the transformer that lowers the electric power from several thousands volts down to 220/110 is a potential road block to the broadband signal.
	www.wave-report.com /tutorials/bpl.htm (1076 words)

	JS Online: Opposition to power line intense (Site not responding. Last check: 2007-10-20)
		Opponents of the 345,000-volt line, the first high-voltage power line built in Wisconsin in decades, are just as determined now as when the line was first proposed four years ago to help ease the state's power woes.
		The line is considered vital to the state's fragile power transmission grid, which experienced energy shortages in the late 1990s.
		The northwestern Wisconsin line, opponents say, would intrude on the beauty of an unspoiled area that serves as a summer and fall retreat for folks from southern Wisconsin and is home to dairy farmers, as well as retirees and others seeking to get away from it all.
	www.jsonline.com /news/state/oct03/174931.asp (1373 words)

	Background on proposed MN-WI transmission lines
		WPS and Minnesota Power are seeking approval from Wisconsin and Minnesota regulators for their power line proposal.
		Roger Steffen says their organizing efforts against the power line are "gathering so much steam that we’re worried we’ve got too many people." With a length of 250 miles, the utility project cuts across a lot of lives.
		The power line, estimated to cost from $125 million to $175 million, could be in service by 2002 and, if approved, would be the state's first major long-distance power transmission project in 30 years.
	www.alphacdc.com /treaty/powerline.html (6715 words)

	JS Online:One power line must wait (Site not responding. Last check: 2007-10-20)
		A $124 million high-voltage power line that would cross 60 miles of Waukesha, Jefferson and Dane counties won't be needed as soon as planners had envisioned.
		The 345,000-volt power line was thought to have been needed as soon as 2011, and was part of a $3.4 billion, 10-year transmission upgrade plan released in September by ATC, the company that owns and operates eastern Wisconsin's major electric lines.
		The line was expected by some to be controversial, because it would have used some of the same right of way used in recent years by Wisconsin Gas Co. to build a natural gas lateral pipeline in Ixonia.
	www.jsonline.com /bym/news/dec05/380573.asp (816 words)

	Apple - Power Mac G5 (Site not responding. Last check: 2007-10-20)
		Power one up today and blaze through your work, deliver ahead of schedule, and astound your clients — because this baby really moves.
		“The new Power Mac G5 Quad dramatically raises the level of what’s possible with desktop video editing and motion graphics, and AJA is thrilled to be a part of the transition with our new Kona LHe.
		The power of the Power Mac G5 Quad, supported by the incredible bandwidth of an all-new PCI Express architecture, will be a compelling solution for video professionals of all levels, and we anticipate a rapid migration to these new machines.”
	www.apple.com /powermac (1025 words)

	Home Page
		The State of Connecticut passed by overwhelming margins in early May 2004 a law that requires power lines to be buried if they pass near residences, schools, hospitals and other sensitive facilities.
		A major June 2005 British study concludes there is a statistical link between EMF from power lines and childhood leukemia even at distances up to 200 meters.
		Xcel's proposal to build a new power line through the SE metro portion of Minnesota's Twin Cities.
	www.powerlinefacts.com (358 words)

	PCWorld.com - Power Line Broadband Comes to Texas
		Customers who subscribe to the service simply plug a tiny modem, based on the HomePlug power line standard, into an electrical outlet and connect a cable from their computer for Internet access, which is capable of two-way speeds 25 times faster than other high-speed services, according to the Current Web site.
		Broadband power line technology is not entirely new, and has encountered commercial and technological difficulties over the past several years, including spectrum interference with ham-radio operators, in both North America and Europe.
		Eon later abandoned the broadband power line market, claiming the technology is too complicated and costly to deploy with little chance of seeing a return on investment any time soon.
	www.pcworld.com /resource/article/0,aid,124008,pg,1,RSS,RSS,00.asp (599 words)

	The Power Line PITCH SOFTBALL: Valuable softball pitching advice for girl softball pitchers
		is an imaginary line from the center of the pitching rubber to the rear point of home plate.
		(2) Land with the toe of your stride foot on the power line.
		Use a string or chalk line 35 to 40 feet long…nail one end in the ground at a point 3½ or 4 feet in front of the pitching rubber, in a line going to the center of home plate from the middle of the rubber
	www.pitchsoftball.com /ThePowerLine.html (682 words)

	Power Line: March 2005 Archives
		Rather, he assumes that judges should possess all of the power they have appropriated, and that criticism of the way in which they exercise their power somehow is out-of-bounds.
		At Power Line, our most most important contribution to counterbalancing the partisanship of the mainstream media was our role in the exposure of the fake documents publicized by "60 Minutes" in its September 8 report on President Bush's Air National Guard service.
		The powers-that-be at the college extended the voting deadline this morning from April 11 to April 22 -- or so I was advised in a telephone conversation with a college representative this morning.
	powerlineblog.com /archives/2005_03.php (12731 words)

	FSK Wire Modem: data transfer over any wire, PBX phone lines and high voltage power lines
		It permits full-duplex asynchronous data transmission over 120V or 240V power lines at data rates from 0 to 9600 baud.
		The power line modem eliminates costly cable installations and, without the need for other modems or special equipment, achieves efficient data rates with significant savings.
		Power line modem applications include automated materials handling equipment, stacker cranes, rotating casting tables, electronic sign control, conveyor belt monitoring and general industrial data communications.
	www.data-linc.com /powerline.htm (356 words)

	Overhead Power Line Safety
		Look up before raising a ladder or pole to verify that it will not be close to power lines when raised.
		If you see a fallen line, fallen tree limbs, as well as anything they are touching-such as puddles and fences, stay far away.
		If there is a fallen power line near your home, stay inside unless told by emergency personnel to evacuate.
	www.csu.org /residential/safety/page7712.html (317 words)

	More Power!
		Voltage is monitored with a dedicated miniature transformer, the current is measured using a home built current transformer that clamps around the incoming power feed, and the real power is calculated with an analog multiplier followed by a low pass filter to obtain the DC component (real power).
		The data on power, voltage, current and frequency is displayed on the home status window.
		This voltage seems unaffected by the instantaneous power draw of my own home (thus remains largely unchanged by my own HVAC units cycling), but is closely correlated to the current time and temperature conditions.
	www.edcheung.com /automa/power.htm (1251 words)

	Power Line
		You can keep up with John's posts on Power Line News, where RWN will head up the blog RSS feeds for the next week; we'll also link off this site from time to time over the coming week.
		UPI reported yesterday (via Power Line News) that the Democrats are "hunting through" the last three defense appropriations bills in search of a "scandal." The always-charming Democrats are looking for funding requests made by former Congressman Randy Cunningham, hoping to tie them to appropriations that were ultimately made.
		Several new video clips are available at Power Line Video.
	powerlineblog.com (3464 words)

	Power Line
		Several of the most powerful strands of the speech last night, those where he wore his own feelings on his sleeve, were those that came out of his own heart and life.
		The lines were clearly drawn; the Trunk and I argued that race discrimination is always a bad idea (not to mention illegal, in the context of a state institution like the University of Michigan); she argued that it all depends.
		Much of York's material has already appeared on Power Line, but the article is worthwhile in its discussion of the refusal of other anti-war factions to condemn Brian Becker and his fellow Workers World Party activitsts.
	powerline.blogspot.com /2003_01_01_powerline_archive.html (15494 words)

	ARRLWeb: Broadband Over Power Line (BPL) and Amateur Radio
		The graph and article shows the expected receiver input power from the natural noise floor (galactic noise (from ITU-R P.372-8)); and the expected receiver input power from BPL that is of intensity sufficient to result in a maximum field strength of 30?V/m at 30m distance as specified by FCC Part 15.209.
		The graph's receiver power axis is scaled in both dBm and in "S-units".
		Annual Minnesota power Systems Conference (MIPSYCON), has a tutorial about broadband over power line and the new FCC rules restricting how it can be deployed.
	www.arrl.org /tis/info/HTML/plc (869 words)

	ARRLWeb: FCC Power-Utility Letter
		Your power company may be interested in the text of the letter the FCC Call Center can send out in cases of power line interference.
		Under FCC rules, most power-line and related equipment is classified as an "incidental radiator." This term is used to describe equipment that does not intentionally generate any radio-frequency energy, but that may create such energy as an incidental part of its intended operation.
		The FCC prefers that those responsible for the proper operation of power lines assume their responsibilities fairly.
	www.arrl.org /tis/info/fcc_utility_letter.html (930 words)

	PowerPro - Catch The Power!
		Luckily the simulated line is easy to spot as they’ve chang...
		At this time, the counterfeit line has not been spotted in the United States; however, it is best to be cautious of any PowerPro line being sold at a drastically low price.
		Fred Roumbanis is fishing a long way from home this year in an attempt to requalify for the FLW Tour.
	www.powerpro.com (165 words)

	Power Online: Digital Marketplace for the power generation industry
		Then you need the expert advice of Power Online, the premier sourcing site for the power generation industry.
		Our expertise in designing and manufacturing thermal conductivity analyzers for hydrogen cooled generators enables us to bring the most safe, the most flexible and the most cost effective solution to market.
		The rating ranges for this new package include 350 — 550 ekW (Standby) and 320 — 455 ekW (Prime) in a 60 Hz model, and 400 — 550 kVA (Standby) and 365 — 500 kVA (Prime) in a 50 Hz model, all powered by the new Cat C15 engine...
	www.poweronline.com (303 words)

	WSBTV.com - News - Blast Linked to Power Line
		ATLANTA -- Georgia Power crews continued working Monday afternoon to repair underground power lines in downtown Atlanta that exploded overnight, sending manhole covers flying into the air.
		The explosion, which happened around 1:15 a.m., was caused by an electrical line that supplies power to a traffic light caught fire before exploding, a Georgia Power engineer said.
		Officials said the incident disrupted power to some downtown traffic signals and a communications facility for the Georgia State Patrol.
	www.wsbtv.com /news/3672708/detail.html (388 words)

	BPA Power Business Line (PBL)
		Note: The footer of each page on the PBL web site provides additional navigation tools that link directly to certain pages within the site, including the Site Map and a list of all the Navigation Menus (access key = N) that appear on the left side of each PBL web page.
		NOTICE: This server is owned and operated by the Bonneville Power Administration, United States Department of Energy.
		Use of this system is monitored by system and Security personnel.
	www.bpa.gov /power (177 words)

	Proto Power West/A-Line Web Site
		A-Line/Arrow Hobby, a division of Proto Power West, is a diversified hobby products retailer and manufacturing company producing a high quality line of precision HO locomotive power chassis, model vehicles and vehicle detail parts, intermodal containers and cars, and an extensive line of railroad detail parts.
		We have innovated many of the newest concepts in model railroading and continue to do so today.
		However, we are constantly adding new products to our lines - faster than our catalog can keep up.
	www.ppw-aline.com (213 words)

	Power Line Systems, Inc. Home Page (Site not responding. Last check: 2007-10-20)
		Power Line Systems develops, sells and supports software for the design of transmission lines and their structures.
		We are the creators of the industry standard line design programs PLS-CADD, PLS-POLE and TOWER.
		Subscribe to Power Line Systems, Inc. mailing list
	www.powline.com (69 words)

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