| DP | Insulating oil | Insulating paper | ||
| Water content/ppm | Acid value (mgKOH/g) | Water content/ppm | Acid value (mgKOH/g) | |
| 1131 | 42 | 0.0957 | 22160 | 0.486 |
| 775 | 54 | 0.0926 | 21920 | 0.548 |
| 326 | 81 | 0.0931 | 21380 | 0.558 |