The three main factors which can affect the health of the transformers are paper, which is used for conductor insulation; the pressboard, which is used for the major insulation and winding support; and the insulating oil.
With age, water and contaminants (air or gas bubbles, particles of different origins, oxygen, and oil aging) dissolve in the dielectric fluid of the transformer, increasing the risk of failures or accelerating aging of the insulation system, thus reducing the technical life. The level of possible contamination of the insulating oil over the years depends on its design, especially on the effectiveness of the oil preservation system and sources of contamination.
By sampling and analyzing the dielectric fluid, contaminants can be detected, and appropriate preventative actions initiated. The Oil and Gas Analysis remains a critical component of the condition assessment of the transformer.
Why Hitachi Energy
- Combining the latest test technology and equipment with a century of design knowledge and expertise ensures reliable test reports and recommendations.
- By translating the test data into actionable information and recommendations, an informed decision can be taken on how to tackle the condition of the transformer.
- Service solutions aimed at addressing problems with the transformer, such as Oil Filtration, Oil Reclamation, and Vapour Phase Drying (VPH), are readily available.