Used frequency controller

Consider the transformer's age, capacity, voltage rating, and overall condition. Check for maintenance records and any signs of wear or damage, such as oil leaks or rust.

Use a reputable transport service that specializes in moving heavy electrical equipment. Ensure the transformer is properly secured, protected from moisture, and handled carefully during transit.

Regular maintenance includes checking oil levels, inspecting for leaks, cleaning and inspecting bushings, and testing insulation resistance. Follow the manufacturer's guidelines for detailed maintenance intervals.