LIGHTNING PROTECTION FOR MASTS
3 (8)
Uppgjord (även faktaansvarig om annan) -
Prepared (also subject responsible if other)
Nr -
No.
KL/ECS/S/LT Magnus Lindahl
ECS/S/LT-96:5037
Dokansv/Godk -
Doc respons/Approved
Kontr -
Checked
Datum -
Date
Rev
File
KI/ECS/S/LTC
1996-06-04
A
Error! Unknown switch argument.
Explanation of terms
Lightning conductor
A conductor dimensioned to withstand the direct action of lightning and capable of
conducting the lightning current without becoming damaged.
Earth electrode
A conductor laid in the ground, giving good contact with the surrounding soil.
Earth electrode system
A number of interconnected earth electrodes.
Deep earth electrode
A conductor driven vertically into the ground; also known as an earthing bar.
Down lead
The connection between the collector and the earth electrode system. Metal masts
with good conductivity may be used as down leads.
Ring leads
Conductors, usually buried in the ground, connecting one or more down leads with
one or more earth electrodes. Often placed in the form of a closed circuit around a
mast or building to give symmetrical current conduction.
Protection distance
The minimum air gap between two objects, over which a lightning discharge
cannot take place.
Surge voltage protection
Spark gap with voltage - dependent components.
Lightning frequency
Number of days with lightning per year.
Lightning - exposed object or conductor
Object or conductor on which lightning strikes can be anticipated, for example,
antennas, masts, support wires and down leads.
