How often does a dry-type transformer require a maintenance check?

In a clean indoor environment, a maintenance check can usually be conducted once a year. Under dusty conditions that might be encountered outdoors, the maintenance should normally be conducted every six months. Trafo Power Solutions guides its customers in their maintenance planning, by providing a maintenance manual with each installation. This details the required frequency of service interventions, as suited to the specific transformer and site conditions. The company also offers to conduct the actual maintenance service, should the customer require.