ROCKWILL manufactures all kinds of: oil immersed type transformers, power transformer, distribution transformer, Dry type distribution transformer, prefabricated substation, compact substation, pad mounted transformer, step voltage regulator, self protected transformer (CSP) , dry type transformers, cast resin transformer, earthing / grounding transformer, prefabricated substation,transformer components, transformer parts ... Capacity from 5kVA up to 5000kVA, 5000kVA up to 50MVA,..