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[[file:Pylon_ds.jpg|thumb|Pylon ds]] [[file:NAURU_JULY_2007_(10709113444).jpg|thumb|NAURU JULY 2007 (10709113444)|left]] [[file:Łomża_linia_elektroenergetyczna_napowietrzna.jpg|thumb|Łomża linia elektroenergetyczna napowietrzna]] [[file:Einebenenleitung.jpg|thumb|Einebenenleitung|left]] [[file:Single_circuit_overhead_power_line_with_distribution_lines.png|thumb|Single circuit overhead power line with distribution lines]] [[file:Electric_Sails.jpg|thumb|Electric Sails]] {{Short description|Wires used to carry electricity above the ground}}
{{Use dmy dates|date=October 2023}}
{{Electric power transmission}}

An '''overhead power line''' is a structure used in [[electric power transmission]] and [[electric power distribution]] to transmit electrical energy along large distances. It consists of one or more [[conductors]] (commonly multiples of three) suspended by [[poles]] or [[towers]]. Since most of the insulation is provided by air, overhead power lines are generally the lowest-cost method of power transmission for large quantities of electric energy.

==Components==
Overhead power lines consist of several key components:
* '''Conductors''': These are usually made of [[aluminum]] (sometimes reinforced with [[steel]]) and are responsible for carrying the electrical current.
* '''Insulators''': These are used to attach the conductors to the poles or towers and prevent the current from flowing to the ground. They are typically made of [[glass]], [[ceramic]], or [[polymer]].
* '''Poles and Towers''': These structures support the conductors and insulators. They can be made of [[wood]], [[steel]], or [[concrete]].
* '''Crossarms''': These horizontal members are attached to the poles or towers and support the insulators and conductors.

==Types of Overhead Power Lines==
Overhead power lines can be classified based on their voltage levels:
* '''Low Voltage (LV) Lines''': Used for [[electric power distribution]] to residential and commercial areas.
* '''Medium Voltage (MV) Lines''': Used for distribution to larger facilities and between substations.
* '''High Voltage (HV) Lines''': Used for long-distance transmission of electrical power.
* '''Extra High Voltage (EHV) Lines''': Used for very long-distance, high-capacity transmission.

==Design Considerations==
Several factors are considered in the design of overhead power lines:
* '''Electrical Load''': The amount of electrical power the line needs to carry.
* '''Environmental Conditions''': Weather conditions such as wind, ice, and temperature variations.
* '''Mechanical Strength''': The ability of the poles, towers, and conductors to withstand physical stresses.
* '''Safety''': Ensuring that the lines are safe for the public and maintenance personnel.

==Advantages and Disadvantages==
===Advantages===
* Lower cost compared to underground power lines.
* Easier to install and maintain.
* Easier to identify and repair faults.

===Disadvantages===
* Aesthetic impact on the landscape.
* Vulnerability to weather conditions such as storms and ice.
* Potential hazards to wildlife and humans.

==Maintenance==
Regular maintenance of overhead power lines is crucial to ensure reliability and safety. This includes:
* Inspection of conductors, insulators, and support structures.
* Vegetation management to prevent trees from interfering with the lines.
* Repair and replacement of damaged components.

==Related Pages==
* [[Electric power transmission]]
* [[Electric power distribution]]
* [[Insulator (electricity)]]
* [[Transmission tower]]
* [[Electrical grid]]
* [[Substation]]

[[Category:Electric power transmission]]
[[Category:Electric power distribution]]
[[Category:Electrical engineering]]
[[Category:Energy infrastructure]]

{{Electricity-stub}}

Overhead power line - Revision history

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