Rolling Ball Lightning Protection

The sphere rolls up and over and is supported by lightning masts shield wires substation fences and other grounded metallic objects that can provide lightning shielding.

Rolling ball lightning protection. Lightning protection design for a structure using rolling sphere method is undertaken. The purpose is to evaluate lightning protection performance based on the leader potential concept. Rolling sphere method use an imaginary sphere of radius s over the surface of a substation. Dimension a in both figures is 20 or 25 feet and is the maximum spacing recommended by the nfpa between lightning rods.

An air terminal lightning rod or franklin rod a down conductor and grounding. The lightning protection system lps relies upon the application of the physics of electrical discharges. A piece of equipment is said to be protected from a. The rolling sphere method is included in national fire protection association document nfpa 780 standard for the installation of lightning protection systems the standard is based upon rigorous scientific research testing with real lightning and more than two hundred years of proven performance.

The air termination system is placed such that the sphere only touches the air terminations and not the structure. Rolling sphere method rsm. Basically by rolling a ball around an object or group of objects and tracking where the ball stays in contact determines where the lightning attachment may happen. In this case radius of the sphere is calculated using the leader potential concept for calculating striking distance.

It is needed to protect the electrical and electronic equipment against the lightning strikes for example the telecommu. The protection calculation of large complete substations such as. Generating a lighting ball from a streak lighting. Lightning protection area using rolling sphere method but of an insufficient lightning protection class rods and wires the primtech lightning protection calculation can accommodate lightning protection rods and wires as lightning arresters.

Thus where your lightning protection system should be deployed for a non isolated system that is. The rolling sphere method it involves the design of lightning protection for a building using what is known as the rolling sphere method. Kreosan english recommended for you. Generally a lightning protection system is designed such that the rolling sphere only touches the lightning protection system and not the structure i e.

Lightning protection for a house or building usually consists of 3 components. Naked science 60 805 views.