Indonesian Journal of Electrical Engineering and Computer Science Vol. 12, No. 1, October 2018, pp. 370~377 ISSN: 2502-4752, DOI: 10.11591/ijeecs.v12.i1.pp370-377  370 Journal homepage: http://iaescore.com/journals/index.php/ijeecs Space Charge and Electric Field Analysis on Contaminated XLPE Insulator M.H.A. Wahab 1 , N. A. M. Jamail 2 , E. Sulaiman 3 , Q.E. Kamarudin 4 , N.A. Othman 5, S.M.N.S. Othman 6 1 Department of Electrical Engineering, Politeknik Mersing, Johor Malaysia 2,3,5 Faculty of Electrical and Electronic Engineering, Universiti Tun Hussein Onn Malaysia 86400 Parit Raja, Batu Pahat, Johor, Malaysia 4 Faculty of Mechanical and Manufacturing Engineering, Universiti Tun Hussein Onn Malaysia 86400 Parit Raja, Batu Pahat, Johor, Malaysia 3,6 Research Centre for Applied Electromagnetics, Universiti Tun Hussein Onn Malaysia 86400 Parit Raja, Batu Pahat, Johor, Malaysia Article Info ABSTRACT Article history: Received Jun 1, 2018 Revised Jul 10, 2018 Accepted Jul 25, 2018 Nowadays, XLPE cable has been widely used because it has better resistance than other cables. XLPE insulation has unique features including a high dielectric strength and high insulation resistance. A lot of researches based on hardware and software have been conducted to prove the effectiveness of XLPE cable such as AC and DC applications and Space Charge Distribution measurement under HVDC at High Temperature. This research focused on analysis of space charge and electric field on XLPE cable with effect of non- uniform contamination layer by using Quickfield Software. Non-uniform contaminations have been applied along XLPE cable using Arsenic Tribromide (AsBr3), Boron Bromide (BBr3), Ethylene Dichloride (CH2C1), Formic Acid (CH1O2), Formamide (CH3NO) and Alcohol element. Presence of these contamination elements represent of underground contamination. The size and layer of the contamination were non-uniform type. From the results, it is shown that lower dielectric constant of contamination will affect more on charge of XLPE insulation. As a conclusion, it can be seen lower dielectric constant value of contamination element greatly affecting the performance of XLPE insulation. Furthermore, size of contamination also influences the content of charge in contamination where the bigger the contamination size, the more charge contained in the contamination. Keywords: Quickfield XLPE cable Space Charge Electric Field Dielectric Constant Copyright © 2018 Institute of Advanced Engineering and Science. All rights reserved. Corresponding Author: N. A. M. Jamail Faculty of Electrical and Electronic Engineering, Universiti Tun Hussein Onn Malaysia 86400 Parit Raja, Batu Pahat, Johor, Malaysia. Email: norakmal@uthm.edu.my 1. INTRODUCTION XLPE has begun to develop since 1963. There are Underground Power Cable, Distribution Cable, Overhead Transmission Line and Industrial Cable [1]. Researches have been done on Electric field Calculations for AC and DC Applications of Water Controlled Cable Termination [2] and Simultaneous Measurement of Space Charge Distribution and External Circuit Current in XLPE under HVDC at High Temperature [3] and contamination [4-5]. Nowadays, XLPE cable has been widely used because it has better resistance than other cables [6-8]. The improvement of the XLPE cable has made from time to time under extensive research in order to prove XLPE cable is safe to use. This improvement will increase the demand of international market. In addition, XLPE cable has been classified into several use such as transmission and