For this, the test-
ing arrangement used basis, which also
used for the high-voltage testing according IEC TS
62561-8 and represents the worst-case scenario.2.
Current density vectors resistive field control and po-
tential density insulated conductor time 1.2.13.
Field diagram insulated conductor the first equi-
potential bonding terminal during type test time =
1. an
induced voltage only present insulated con-
ductor when lightning strikes, resistive field control
can used avoid floating discharges. Using the numerical field calculation, the res-
istive field controller can calculated time-dis-
creet manner for the entire course the impulse
voltage.2 the applied impulse voltage 1.2/50.4 Potential control
For safe operation insulated conductor, meas-
ures avoid floating discharges are necessary. Both diagrams show how the nu-
merical, time-discreet field calculation can used to
optimise the resistive field control that the current
in the field control layer can kept small pos-
sible, whilst still avoiding the formation floating dis-
charges. The right-hand image uses cross-sec-
tion diagram show the current density vectors and
equipotential areas.2/50 below
the earthed fastening clamp. As
an example, the left image shows the field diagram of
this arrangement with applied impulse voltage of
1,000 the area the equipotential bonding ter-
minal. The lower
the resistance designed be, the more effective it
is.
Here, equipotential lines and the vertical electrical field
lines can seen. Within the external conductive layer
and the resistive field control layer, the current lines
can seen, which are significant for avoiding floating
discharges.
In upward direction, the value given the re-
quirement for effective field control. The value limited downward direction that
no partial lightning current can flow into the building. potential 1,000 is
applied the internal conductor.2
µs the applied impulse voltage 1. This allows optimisation the resistance
value the resistive field controller.
The voltage load lightning strike impulse
voltage.
TBS
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Chapter The external lightning protection system
