Rincon-based Efacec Power Transformers, Inc. has delivered a shell-type power transformer ready for service, marking the first time a unit of that type has been successfully designed and manufactured in the United States in more than 20 years.

Shell transformers have been made overseas since a key U.S. manufacturer shut down more than two decades ago. Shell Transformer

Efacec's state-of-the-art plant in Rincon is the only manufacturing plant in the U.S. to fully design and manufacture transformers using both core and shell technologies. More shell transformers are in production and will be delivered within the next few months, the company said.

While Efacec Power Transformers is a relatively new player in the U.S. market, it has been manufacturing transformers since 1957 with a production facility in Portugal.

"Our factory acceptance test and delivery records reflect our success in achieving a complete transfer of technology from Portugal to the U.S. and an ability to perform beyond expectations," said Jorge Guerra, Efacec USA's chief operating officer. "By using innovative technology and successfully training qualified people who are committed to fulfilling our customer's needs, our U.S. power transformer plant already has developed a significant number of orders."

Transformer Core The newest shell unit was delivered last month to a domestic utility company. A spare unit was delivered to another utility in June.