ERICORE DOWNCONDUCTOR
The function of a down conductor is to provide a low impedance path from the air termination to the ground system so that the lightning current can be conducted to earth, without the development of excessively large voltages.
In order to reduce the possibility of dangerous sparking (side-flashing), the down conductor route(s) should be as direct as possible with no sharp bends or stress points where the inductance, and hence impedance, is increased under impulse conditions
ERITECH ERICORE is a specialised coaxially screened and insulated downconductor that conveys higher frequency lightning current to ground safely via a known low impedance route, and in such a way as to ensure only minimal risk of sideflashing.
The unique ability of ERITECH ERICORE to confine discharge current and simultaneously support electrical bonding, helps ensure minimal risk to building, occupants and sensitive electronics.
The design of the ERICORE cable is based on the use of coaxial cable theory and extensive laboratory testing using ERICO’s own High Voltage and High Current Impulse Generators here in Hobart Australia and Solon USA , as well as similar equipment at other high voltage laboratories elsewhere in the world.
In the design of the cable, ERICO had analysed both the electric field stress and the voltage stress that the cable will be subjected to under a variety of different conditions. Where ERICO had to use lightning related parameters as part of their analysis, they had extracted this information from Annex A of International Standard IEC 61204‑1, Protection of Structures Against Lightning.
Based on ERICOs measurements, and on the electrical parameters of the materials used in the manufacture of the conductor , ERICORE was able to withstand voltage impulses of over 200kV, and electric field stresses of over 100kV/mm for the main insulator.
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