Radzi, I.F. and Nik Ali, N.H. and Rameli, N. and Mohd Ariffin, A. and Abd Rahman, M.S. and Ahmad, M.R. and Salleh, A.S.  (2019) Partial discharge detection device using ultrasonic sensor on medium voltage XLPE cable.  Indonesian Journal of Electrical Engineering and Computer Science, 17 (2).  pp. 886-894.  ISSN 25024752