Conversion of Current Value between Two Types of SPDs
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Abstract:
In order to study the equivalent relation between the maximum discharge currents (〖WTBX〗I〖WTBZ〗max)of two types of SPDs (ClassⅡ test and ClassⅠ test), the paper uses the method of taking 〖WTBX〗I〖WTBZ〗max 〖KG*5〗(8/20 μs) and 〖WTBX〗I〖WTBZ〗imp〖KG*5〗(10/35 μs) current waves as oblique waves, and calculates the 〖WTBX〗I〖WTBZ〗max〖KG*5〗(8/20 μs) current wave energy exerted on the ClassⅡ test SPD and 〖WTBX〗I〖WTBZ〗imp〖KG*5〗(10/350 μs) current wave energy exerted on the ClassⅠtest SPD, equals the energy of the two, then calculates the ratio of 〖WTBX〗I〖WTBZ〗max〖KG*5〗(8/20 μs)and 〖WTBX〗I〖WTBZ〗imp〖KG*5〗(10/350 μs), both of which should be satisfied. It is concluded through the calculation that when the voltage protection level of ClassⅡ test SPD is equal to that of ClassⅠtest SPD and the ClassⅡ test SPD maximum discharge current is 2156 times as much as that of ClassⅠtest SPD, the both bear the same energy.
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Supported by:Beijing E-Tiller Technology Development Co., Ltd.
Supported by:Beijing E-Tiller Technology Development Co., Ltd.