Archive for the ‘Pictures’ Category

Some picture of Surge Arrester

Posted: May 6, 2011 in Pictures

blow are some picture of surge arrester where are use in transmission lines.

it was our practical Soil resistance in UTM by the leadership of Prof Hussein to deal theory with practice

Grounding Systems Zinc ribbon

Posted: May 6, 2011 in Pictures

Grounding Systems

Zinc ribbon ground system installed at a mainline natural gas valve station

A lightning rod or lightning conductor is a metal rod or conductor mounted on top of a building and electrically connected to the ground through a wire, to protect the building in the event of lightning. If lightning strikes the building it will preferentially strike the rod, and be conducted harmlessly to ground through the wire, instead of passing through the building, where it could start a fire or cause electrocution. A lightning rod is a single component in a lightning protection system. In addition to rods placed at regular intervals on the highest portions of a structure, a lightning protection system typically includes a rooftop network of conductors, multiple conductive paths from the roof to the ground, bonding connections to metallic objects within the structure and a grounding network. The rooftop lightning rod is a metal strip or rod, usually of copper or aluminum. Lightning protection systems are installed on structures, trees, monuments, bridges or water vessels to protect from lightning damage. Individual lightning rods are sometimes called finials, air terminals or strike termination devices. The lightning rod was invented by Benjamin Franklin in the Americas in 1749 and, perhaps independently, by Prokop Diviš in Europe in 1754.

pic a is the structure of franklin rod connection and in pic b one rod is illustrated after hit by lightning stroke.

the effect of Franklin rod to protect of Dubai Tower.

lightning animation

Posted: February 1, 2011 in Pictures

it is a nice animation about how lightning stroke to the earth plus an inter-cloud lightning.