Most of the transformers supplied to the market by ABB use Core Type Technology.
They are mostly used in customer applications as generator step up and system intertie power transformers.
Large Power Transformers are defined within ABB as units with a three phase power rating higher than 200 MVA or with voltage ratings higher than 275 kV. ABB supplies three phase units up to 1100 MVA and single phase units up to 500 MVA.
Power transformers for system voltages up to and including 800 kV have been delivered to the market since the 1970’s.