Delta Star power transformers are individually designed and manufactured to meet and exceed the highest industry standards and the exact specifications for the particular application involved. They are not stock units modified or customized to meet minimum specifications. Special options and features are planned into the original design and built into the unit. Delta Star power transformers are liquid-oil-immersed for the most efficient and reliable long-term operation in a wide variety of utility and industrial applications (transformer oil meets or exceeds ASTM D 3487 standards). Markets Served Utility Applications include power and distribution, system step up or step down transmission voltages, system tie, automatic voltage regulation, and many more. Industrial Applications include secondary load center, unit substation, distribution service, and power substation. Delta Star power transformers are manufactured in the small to medium size range from 5 kV up through 230 kV class in single and 3-phase ratings, 5 through 180 MVA (self cooled rating) with or without load tap change equipment. Power Generation Applications include generator step up, unit auxiliaries (UAT), and station service.