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2. (2) M. Ikeda, T. Inoue, and T. Yanari: “V-t Characteristics and Probabilistic Distribution of Partial Discharge and Breakdown Voltages for Transformer Insulation”, T. IEE Japan, Vol. 101-B, No. 10, pp. 571-578 (1981) (in Japanese)
3. (3) E. Zaima, S. Okabe, T. Ohno, Y. Taniguchi, and H. Murase: “AC V-t Characteristics of Core Type Transformer Insulation Model”, T. IEE Japan, Vol. 115-B, No. 4, pp. 375-381 (1995) (in Japanese)
4. (4) S. Okabe, T. Ohno, E. Zaima, A. Kishi, K. Aono, and N. Hosokawa: “AC V-t and Impulse V-N Characteristics of Shell-Form Transformer Insulation Model”, T. IEE Japan, Vol. 115-B, No. 4, pp. 394-400 (1995) (in Japanese)
5. (5) “Cross-appraisal of the electric power machine and insulation material technology, and systematization of the common technology”, IEEJ Technological Report, No. 945 (2003)