No. | Specified reasons disruptions’ causes in 2010 | Cluster | Description of the cluster | Number of failures | % of failures |
---|---|---|---|---|---|
1 | trees + plants | A | meteorological effects | 1205 | 4.7 |
2 | ice + rime + snow + frost | 853 | 3.3 | ||
3 | wind | 134 | 0.5 | ||
4 | atmospheric discharges | 1461 | 5.7 | ||
 |  |  | Total A | 3653 | 14.26 |
5 | planned breaks | B | operational shutdowns | 3742 | 14.6 |
6 | trial quick | 4125 | 16.1 | ||
7 | quick changeover | 1977 | 7.7 | ||
8 | repair >Â 3 min. | 464 | 1.8 | ||
9 | damage by the recipient on the MV | 7 | 0.0 | ||
10 | damage by an adjacent oper. | 769 | 3.0 | ||
11 | switch >Â 3 min. | 5530 | 21.6 | ||
 |  |  | Total B | 16,614 | 64.86 |
12 | digging | C | vandalism | 620 | 2.4 |
13 | animals | 204 | 0.8 | ||
 |  |  | Total C | 824 | 3.22 |
14 | aging, factory defects | D | aging | 1917 | 7.5 |
15 | power system protection automation errors | E | electronics devices | 32 | 0.1 |
16 | unidentified | F | unidentified | 2576 | 10.1 |
 |  |  | TOTAL | 25,616 | 100.0 |