The response of an impulse voltage measuring system is numerically analyzed by extensively using the Numerical Electromagnetic Code (NEC-2). The dynamic electromagnetic field around an impulse voltage measuring system including a resistor divider and a lead line is calculated to produce the output voltage waveform of the divider. The accuracy of the calculation is proved satisfactory by comparing the calculated waveforms with measured ones. The influencing factors of a measuring system on the USR (Unit Step Response) parameters are discussed based on the results of the numerical analysis.
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