Insulator Makes Life Better 
Current position: Orient > model >

Overhead power line

An overhead power line is a structure used in electric power transmission and distribution to transmit electrical energy along large distances. In the transmission lines, power companies used some polymer insulators or porcelain insulators to support and insulate for ensuring safety.

Overhead power line

Overhead power line

Overhead power line consists of one or more conductors (commonly multiples of three) suspended by towers or poles. 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.

Overhead power transmission and distribution lines are classified in the electrical power industry by the range of voltages:
◆ Low voltage (LV) – less than 1000 volts, used for connection between a residential or small commercial customer and the utility with LV insulators, such as shackle insulator.
◆ Medium voltage (MV; distribution) – between 1000 volts (1 kV) and to 69 kV, used for distribution in urban and rural areas with MV insulators, such as composite pin insulator.
◆ High voltage (HV; subtransmission less than 100 kV; subtransmission or transmission at voltage such as 115 kV and 138 kV), used for sub-transmission and transmission of bulk quantities of electric power and connection to electrical insulators, such as composite suspension insulator.
◆ Extra high voltage (EHV; transmission) – over 230 kV, up to about 800 kV, used for long distance, very high power transmission.
◆ Ultra high voltage (UHV) – higher than 800 kV

 

Relative Articles:
History of composite insulator
How to clean high voltage composite insulator?
Test for composite insulator
Composite silicone insulators; 10-1000kV composite silicone insulator

About Us - Composite insulator manufacturer
More than 30 years experience in power industry since 1978 as a composite insulator manufacturer in China, advanced manufacturing process, strict quality control test system, ISO certificated, excellent communication, considerate services, enable us to be a leading composite insulator manufacturer of composite insulator and polymer insulator.
Our Advantage
ISO 9001 certificate
5000h Aging Type Test Report
Considerate after-sale services
Patent Product and New Technique
Instant Response for Each Requirement

©2014 Zhengzhou Orient Power Co., Ltd All rights reserved. Tel/Fax: +86 371 86097078 
sales@composite-insulator.com  Orient is a composite insulator manufacturer for products of composite insulator and polymer insulator