Lightning generates extremely large surge current and voltage. Malaysia ranks as one of the highest lightning activities in the world, where the average thunder day level for Kuala Lumpur is within 180-300 days per annum. 80% of the lightning discharge currents to the ground in Malaysia exceed 20kA with potentials approaching 50-100 million volts.
On average, 50% percent of Kuala Lumpur stroke exceed 36kA, where it is only 28kA worldwide. Not only the energy of the surge very high in Malaysia, but the frequency of occurence as well.
Due to this reason, the idea of coming up with this project is generated, that is to measure the earth resistance using a portable impulse generator. impulse generator is a device which produces very short high voltage or high current surges. such device can be classified into two types. impulse voltage generator and impulse current generator. for this project, the high impulse voltage is selected because the high impulse voltage is used to test the strength of electric power equipment against lightning and switching surges.
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