The below image shows finished and patented
design insulated, high-voltage-resistant con-
ductor. During the expected lifespan lightning
protection system, insulated, high-voltage-resistant
conductor must withstand multiple lightning events.
Overview the electrical field strength for insulation ma-
terials high-voltage cables and extrapolated values for
the short-time range, well two protected values
from type tests insulated conductors.
For this reason, the insulating material can used up
to close the limit the theoretical resistance of
250 kV/mm [Ushakov]. The properties the materi-
als are checked high-voltage test.13.
Beginning with the secured operating field strengths
for the long-time range, the following image
shows extrapolation the field strength for the
short-time range few 100 ns.5 Technical solution for insulated high-
voltage-resistant conductor
The insulation material not constantly subject to
voltage, meaning that aging processes not play a
role medium and high-voltage cables the power
supply. However, this assumes the
use high-quality materials for the internal and ex-
ternal conductive layer, the insulating material and for
the resistive field control.2. The extrapolation
covers the theoretical field strength given Ushakov
for the short-time range 250 kV/mm for the time
range 100 ns.TBS
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2. From the type tests carried out, the
field strengths effective the test can calculated
and are shown points the image. doing, the cross-section the copper
conductor selected such way that sufficient
lightning current carrying capacity and acceptable
flexibility for routing are given, but, the same time,
the standard specifications from IEC/EN 62305-3 are
fulfilled. They match the
theoretical field strength.
Electrical field strength kV/mm
Load period s
Sample from type guide
Theoretical limit according Ushakov
Ed extrapolated
Ed secured experimentally, Hz
TBS
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135
Chapter The external lightning protection system
