Adaptation of the application of portable protective air gap to the Hungarian live-line maintenance technology

The purpose of this paper is to examine the usability of portable protective air gaps in case of high voltage live-line maintenance in the Hungarian transmission network. After the examination of the characteristics of the network where the PPAG would be used, the operating range of the device has to be determined, then the gap distance has to be adjusted based on measurements with different voltage waveforms, different arrangements and regarding some other parameters affecting the sparkover characteristics. For these reasons measurements were performed in the High Voltage Laboratory (HVL) of Budapest University of Technology and Economics (BUTE); the results of the measurements were evaluated and are introduced in this paper.