Overhead Ground Wire Lightning Protection

2 1 1 installation of static wire the preferred method of lightning protection of overhead sub trans mission circuits is through use of an overhead static wire.

Overhead ground wire lightning protection.

The static wire shall be grounded at every pole except manually operated group air break switch poles. Lightning protection of. The overhead earth wire or ground wire is the form of lightning protection using a conductor or conductors. Overhead shield wire provides lightning protection and distributed grounding important for safe operation of power lines.

Protection zone of ground wire is a cone with apex at the location of ground wire and surface generated by line passing through the outermost phase conductor. Protecting things like lighting standards or trees can provide some area protection based on the zone model. Standard for the installation of lightning protection systems 2014 standards 20. The earth wire intercepts the direct lightning strikes which would strike the phase conductors.

Taller lines require smaller shielding angles than 30 degrees or else there will be shielding failures. The ground wire or earthling screen used for the protection of overhead lines and power stations and substations not only provides an adequate protection against lightning but also reduces the over voltages induced electrostatically or electromagnetically but such shielding is inadequate in providing protection against travelling waves which may reach the terminal equipment and cause damage to it. Performance of electric power overhead distribution lines ieee std 1410 2011 iec 62305 protection against lightning 2013 nfpa 780. Transmission and distribution lines carrying large blocks of power must be permanently protected from lightning strikes and the occasional fault.

Instead of a standard ground wire two ground wires placed at the top of separate external towers located at both sides of the protected line are used. Listed items are common parts for catenary systems. For strokes to wires or the ground plane. For a free material quote and a designed catenary lightning protection system please contact us with your specifications and drawings.

By means of a formed copper wire grounding electrode at each pole. In special circumstances where lightning cannot be allowed to penetrate the use of tall masts and overhead ground wires used in a reduced zone model can provide additional protection. Commonly used for overhead shield wire in high corrosion areas such as industrial seashore and desert environments. Catenary or overhead ground wires can be used for lightning protection to protect open areas launch pads munition storage large haystacks and more.

Opgw of which has aluminum clad steel as a component is also used for overhead shield wire. Abstract in this paper a new kind of overhead transmission line ohl lightning protection system based on external ground wires is analyzed.