VNU Journal of Science Mathematics – Physics, Vol 37, No 3 (2021) 93 100 93 Original Article Breakdown Characteristics of Composite Insulation for High Temperature Superconducting Cable Nguyen Van Dung*, Le Vinh Truong Can Tho University, 3/2 Street, Ninh Kieu, Can Tho, Vietnam Received 22 November 2020 Revised 24 January 2021; Accepted 28 February 2021 Abstract Polypropylene laminated paper (PPLP) and Kraft paper have been studied as multi layer insulation for high temperature superconducting[.]