Overhead Power Line - Revision history

Wiki Gardener at 12:58, 30 September 2014

2014-09-30T12:58:47Z

Wiki Gardener: Wiki Gardener moved page Overhead power line to Overhead Power Line without leaving a redirect

2013-07-24T13:16:01Z

Wiki Gardener moved page Overhead power line to Overhead Power Line without leaving a redirect

Wiki Gardener at 13:15, 24 July 2013

2013-07-24T13:15:32Z

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Wiki Gardener at 13:12, 24 July 2013

2013-07-24T13:12:59Z

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Robert at 13:29, 26 August 2011

2011-08-26T13:29:44Z

Robert at 13:29, 26 August 2011

2011-08-26T13:29:29Z

Robert at 13:17, 18 February 2011

2011-02-18T13:17:17Z

Intern at 11:48, 7 June 2010

2010-06-07T11:48:05Z

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Harald Olk at 14:53, 2 June 2010

2010-06-02T14:53:33Z

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Rauwol mar at 11:16, 4 May 2010

2010-05-04T11:16:49Z

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-== Overview<ref name="WIKIPEDIA: http://en.wikipedia.org/wiki/Overhead_power_line">WIKIPEDIA: http://en.wikipedia.org/wiki/Overhead_power_line</ref> ==
+= Overview<br/> =
-An '''overhead power line''' is an electric power transmission line suspended by towers or poles. Since most of the insulation is provided by air, overhead power lines are generally the lowest-cost method of transmission for large quantities of electric power. Towers for support of the lines are made of wood (as-grown or laminated), steel (either lattice structures or tubular poles), concrete, aluminum, and occasionally reinforced plastics. The bar wire conductors on the line are generally made of aluminum (either plain or reinforced with steel or sometimes composite materials), though some copper wires are used in medium-voltage distribution and low-voltage connections to customer premises.
+[[File:Highvoltagetransmissionlines.jpg|thumb|right|180px|High voltage transmission lines]]An overhead power line is an electric power transmission line suspended by towers or poles. Since most of the insulation is provided by air, overhead power lines are generally the lowest-cost method of transmission for large quantities of electric power. Towers for support of the lines are made of wood (as-grown or laminated), steel (either lattice structures or tubular poles), concrete, aluminum, and occasionally reinforced plastics. The bar wire conductors on the line are generally made of aluminum (either plain or reinforced with steel or sometimes composite materials), though some copper wires are used in medium-voltage distribution and low-voltage connections to customer premises.<ref name="Wikipedia.org: http://en.wikipedia.org/wiki/Overhead_power_line">Wikipedia.org: http://en.wikipedia.org/wiki/Overhead_power_line</ref>
-The invention of the Strain insulator was a critical factor in allowing higher voltages to be used. At the end of the 19th century, the limited electrical strength of Telegraph-style Pin insulators limited the voltage to no more than 69,000 Volts. Today overhead lines are routinely operated at voltages exceeding 765,000 volts between conductors, with even higher voltages possible in some cases.
+The invention of the Strain insulator was a critical factor in allowing higher voltages to be used. At the end of the 19th century, the limited electrical strength of Telegraph-style Pin insulators limited the voltage to no more than 69,000 Volts. Today overhead lines are routinely operated at voltages exceeding 765,000 volts between conductors, with even higher voltages possible in some cases.<ref name="Wikipedia.org: http://en.wikipedia.org/wiki/Overhead_power_line">Wikipedia.org: http://en.wikipedia.org/wiki/Overhead_power_line</ref>
-<u>Overhead power transmission lines are classified in the electrical power industry by the range of voltages:</u>
+<br/>
-*Low voltage – less than 1000 volts, used for connection between a residential or small commercial customer and the utility.
-*Medium Voltage (Distribution) – between 1000 volts (1 kV) and to about 33 kV, used for distribution in urban and rural areas.
-*High Voltage (Subtransmission if 33-115kV and transmission if 115kV+) – between 33 kV and about 230 kV, used for sub-transmission and transmission of bulk quantities of electric power and connection to very large consumers.
-*Extra High Voltage(Transmission) – over 230 kV, up to about 800 kV, used for long distance, very high power transmission.
-*Ultra High Voltage – higher than 800 kV.
-Lines classified as "low voltage" are quite hazardous. Direct contact with (touching) energized conductors still present a risk of electrocution. A major goal of overhead power line design is to maintain adequate clearance between energized conductors and the ground so as to prevent dangerous contact with the line. This is extremely dependent on the voltage the line is running at.
+= Classification =
-== Further Information ==
+= Further Information<br/> =
-*[[Portal:Grid|Portal:Grid]]
+*[http://en.wikipedia.org/wiki/Overhead_power_line#Classification_by_operating_voltage Wikipedia - Overhead power line]
 <br/>
-== References ==
+= References<br/> =
-<references />
+<references /><br/>
 [[Category:Grid]]

← Older revision		Revision as of 13:29, 26 August 2011
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−	~~[[Image:Solec Kujawski longwave antenna feeder.jpg\|thumb\|Solec Kujawski longwave antenna feeder.jpg]]~~ An '''overhead power line''' is an electric power transmission line suspended by towers or poles. Since most of the insulation is provided by air, overhead power lines are generally the lowest-cost method of transmission for large quantities of electric power. Towers for support of the lines are made of wood (as-grown or laminated), steel (either lattice structures or tubular poles), concrete, aluminum, and occasionally reinforced plastics. The bar wire conductors on the line are generally made of aluminum (either plain or reinforced with steel or sometimes composite materials), though some copper wires are used in medium-voltage distribution and low-voltage connections to customer premises.	+	An '''overhead power line''' is an electric power transmission line suspended by towers or poles. Since most of the insulation is provided by air, overhead power lines are generally the lowest-cost method of transmission for large quantities of electric power. Towers for support of the lines are made of wood (as-grown or laminated), steel (either lattice structures or tubular poles), concrete, aluminum, and occasionally reinforced plastics. The bar wire conductors on the line are generally made of aluminum (either plain or reinforced with steel or sometimes composite materials), though some copper wires are used in medium-voltage distribution and low-voltage connections to customer premises.

	The invention of the Strain insulator was a critical factor in allowing higher voltages to be used. At the end of the 19th century, the limited electrical strength of Telegraph-style Pin insulators limited the voltage to no more than 69,000 Volts. Today overhead lines are routinely operated at voltages exceeding 765,000 volts between conductors, with even higher voltages possible in some cases.		The invention of the Strain insulator was a critical factor in allowing higher voltages to be used. At the end of the 19th century, the limited electrical strength of Telegraph-style Pin insulators limited the voltage to no more than 69,000 Volts. Today overhead lines are routinely operated at voltages exceeding 765,000 volts between conductors, with even higher voltages possible in some cases.

@@ Line 1: / Line 1: @@
-[[Image:Electric transmission lines.jpg|thumb|Electric transmission lines.jpg]] [[Image:Solec Kujawski longwave antenna feeder.jpg|thumb|Solec Kujawski longwave antenna feeder.jpg]] An '''overhead power line''' is an electric power transmission line suspended by towers or poles. Since most of the insulation is provided by air, overhead power lines are generally the lowest-cost method of transmission for large quantities of electric power. Towers for support of the lines are made of wood (as-grown or laminated), steel (either lattice structures or tubular poles), concrete, aluminum, and occasionally reinforced plastics. The bar wire conductors on the line are generally made of aluminum (either plain or reinforced with steel or sometimes composite materials), though some copper wires are used in medium-voltage distribution and low-voltage connections to customer premises.
+&nbsp;[[Image:Solec Kujawski longwave antenna feeder.jpg|thumb|Solec Kujawski longwave antenna feeder.jpg]] An '''overhead power line''' is an electric power transmission line suspended by towers or poles. Since most of the insulation is provided by air, overhead power lines are generally the lowest-cost method of transmission for large quantities of electric power. Towers for support of the lines are made of wood (as-grown or laminated), steel (either lattice structures or tubular poles), concrete, aluminum, and occasionally reinforced plastics. The bar wire conductors on the line are generally made of aluminum (either plain or reinforced with steel or sometimes composite materials), though some copper wires are used in medium-voltage distribution and low-voltage connections to customer premises.
 The invention of the Strain insulator was a critical factor in allowing higher voltages to be used. At the end of the 19th century, the limited electrical strength of Telegraph-style Pin insulators limited the voltage to no more than 69,000 Volts. Today overhead lines are routinely operated at voltages exceeding 765,000 volts between conductors, with even higher voltages possible in some cases.
@@ Line 91: / Line 91: @@
 *Double-circuit transmission line
-== Source ==
+== Source  ==
 Original&nbsp;Article from&nbsp;Wikipedia: [http://en.wikipedia.org/wiki/Overhead_power_line http://en.wikipedia.org/wiki/Overhead_power_line]
 [[Category:Grid]]

@@ Line 1: / Line 1: @@
-[[Image:Electric transmission lines.jpg|thumb]] [[Image:Solec Kujawski longwave antenna feeder.jpg|thumb]] An '''overhead power line''' is an electric power transmission line suspended by towers or poles. Since most of the insulation is provided by air, overhead power lines are generally the lowest-cost method of transmission for large quantities of electric power. Towers for support of the lines are made of wood (as-grown or laminated), steel (either lattice structures or tubular poles), concrete, aluminum, and occasionally reinforced plastics. The bar wire conductors on the line are generally made of aluminum (either plain or reinforced with steel or sometimes composite materials), though some copper wires are used in medium-voltage distribution and low-voltage connections to customer premises.
+[[Image:Electric transmission lines.jpg|thumb|Electric transmission lines.jpg]] [[Image:Solec Kujawski longwave antenna feeder.jpg|thumb|Solec Kujawski longwave antenna feeder.jpg]] An '''overhead power line''' is an electric power transmission line suspended by towers or poles. Since most of the insulation is provided by air, overhead power lines are generally the lowest-cost method of transmission for large quantities of electric power. Towers for support of the lines are made of wood (as-grown or laminated), steel (either lattice structures or tubular poles), concrete, aluminum, and occasionally reinforced plastics. The bar wire conductors on the line are generally made of aluminum (either plain or reinforced with steel or sometimes composite materials), though some copper wires are used in medium-voltage distribution and low-voltage connections to customer premises.
 The invention of the Strain insulator was a critical factor in allowing higher voltages to be used. At the end of the 19th century, the limited electrical strength of Telegraph-style Pin insulators limited the voltage to no more than 69,000 Volts. Today overhead lines are routinely operated at voltages exceeding 765,000 volts between conductors, with even higher voltages possible in some cases.
@@ Line 51: / Line 51: @@
 == Low voltage  ==
-[[Image:ABC TQ3157 064.JPG|thumb]]
+[[Image:ABC TQ3157 064.JPG|thumb|ABC TQ3157 064.JPG]]
 Low voltage overhead lines may use either bare conductors carried on glass or ceramic insulators or an Aerial bundled cable system. The number of conductors may be anywhere between four (three phase plus a combined earth/neutral conductor - a TN-C earthing system) up to as many as six (three phase conductors, separate neutral and earth plus street lighting supplied by a common switch).
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 *Air cable
 *Double-circuit transmission line
 [[Category:Grid]]

← Older revision		Revision as of 11:16, 4 May 2010
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	*Double-circuit transmission line		*Double-circuit transmission line

−	[[Category:Grid]]	+	[[Category:Grid old]]