| Maximum Electric Fields in Linear Materials (Unit: kV/mm) | Y0-Y Connected Converter Transformer | ||
| Oil | Insulation Layer | Oil Immersed Pressboard | |
| A1 | 9.07 | 11.23 | 5.19 |
| A2 | 6.26 | 12.77 | 13.01 |
| A3 | 6.30 | 17.27 | 27.73 |
| A4 | 6.16 | 31.06 | 45.38 |