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Due to the increasing influence of power equipment maintenance to the price of delivered/undelivered energy, this paper provides the categories, strategy and policies of the maintenance. It also defines the maintenance activities, the ordinary required maintenance and optimal intervals of the maintenance. The paper defines the maintenance planning in compliance with the confronted requirements of the exploitation and maintenance as well as the availability of plants elements. Based upon the above, a model is provided for the calculation of the life cycle costs (LCC).

MAINTENANCE OF HIGH VOLTAGE EQUIPMENT IN HIGH VOLTAGE SUBSTATIONS