Internal discharge pulse measurement using a microcomputer

The purpose of this research was to predict breakdown of electrical equipment due to deterioration of insulation. An internal discharge pulse measurement system which could analyze the distribution of the discharge according to each phase area of the applied voltage (AC 50Hz) was developed. The system's features were as follows. A half cycle of the applied voltage starting from the negative peak and ending at the positive peak was divided into nine equal phase areas. The distribution of the discharge in each phase area was expressed with a three dimensional displaying method whose dimensions were discharge magnitude (q), number of pulses (n), and time (t).