BTWM developed the Combined CTC, Stepping Combined CTC and the Screening Combined CTC. These kind of CTC is the new type CTC special used in DC Converse transformers. The technical level of the construction size, performance of the new CTC has been reached the imported products, and has successfully used in the South Grid Chuxong Station ±200kv,ZZDFPZ-250Mka/500kv, 3sets and the ±400kv,ZZDFPZ-250Mka/500kv, Converse Current transformers,4sets.
