Research Article
Separation of Transformers for Class 1E Systems in Nuclear Power Plants
Table 8
Power transformer failures based on the components during 2009~2013.
| | Failure category | Number of failures
(2009~2013) | Percentage of failures (%) |
| | Winding | 28 | 14.3 | | Core | 15 | 7.7 | | Bushing | 26 | 13.3 | | OLTC | 20 | 10.2 | | Tank | 6 | 3.1 | | Coolant | 9 | 4.6 | | Insulation | 80 | 40.8 | | Others | 12 | 6.1 |
| | Total | 196 | 100 |
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