AC Test of Power Frequency with NDDI Method

Abstract

Cable is used while transmitting power in an electrical system. High tension cable plays a vital role in electrical power systems. This paper puts forward an AC test of power frequency withstand voltage test of the insulation of the high tension cable. Pin to surface type electrode is used while performing the test. Power frequency withstand voltage test is performed at 11KV & 27KV voltages without the time and with time. Readings are taken at four-electrode distance at 11KV and 27KV voltage. The newton divided interpolation method is used to estimate breakdown voltage at unknown distances. The absolute error is calculated with known breakdown value at known distance with newton divided difference interpolation method at each vale of breakdown voltage at a known distance. The mathematical function is generated at 11KV & 27KV voltage and the mathematical function is plotted with the help of MATLAB software. Manuscript received December 00, 2021; revised August 00, 2021.