Need for Protection,The need for earthing & lightning protection is determined according to many parameters including the lightning flash density of the considered area. A risk analysis method . The lightning flash density or by local data including for example detection network, maps and statistics.
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Components of the earthing & lightning protection system,The installation may be composed of the following elements:
Key :
1- One or more ESEAT
2- Connection component
3- One or more specific down-conductors
4- A test joint for each down-conductor
5- One earth termination for each specific down-conductor
6- Foundation earth electrode (earthing of the structure)
7- Electric power cable
8- Main electric power distribution box with SPD
9- Main telecom distribution box with SPD
10- Telecom cable with SPD
11- One or more equipotential bonding bars
12- One or more equipotential bondings between earth terminations
13- Disconnectable bonding device
14- One or more equipotential bondings (direct or via an Isolating SparkGap).
15- Main earthing bar
16- Electric equipment
17- Metallic pipe
18- One or more equipotential bondings through a spark gap for aerial mast
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General principles : An Early Streamer Emission Air Terminal (ESEAT) is composed of one striking point, emission device and a fixing element and a connection to the down-conductors. The area protected by an ESEAT is determined according to its efficiency . The ESEAT should preferably be installed on the highest part of the structure. It shall be the highest point within the area to be protected.