| Faults/Gases | CO | H2 | CH4 | C2H6 | C2H4 | C2H2 |
| Overheated oil | 0 | 2 | 16 | 19 | 63 | 0 |
| Overheated cellulose | 92 | 0 | 0 | 0 | 0 | 0 |
| Corona in oil | 0 | 85 | 13 | 1 | 1 | 0 |
| Arcing in oil | 0 | 60 | 5 | 2 | 3 | 30 |