| Maximum Electric Fields in Linear Materials (Unit: kV/mm) | Y0-Δ Connected Converter Transformer | ||
| Oil | Insulation Layer | Oil Immersed Pressboard | |
| A1 | 6.49 | 7.46 | 3.43 |
| A2 | 6.12 | 6.77 | 4.61 |
| A3 | 6.14 | 7.17 | 9.37 |
| A4 | 6.09 | 11.75 | 15.26 |