B. J. Baldwin Electric, Inc. - Narvon, PA
Service Company
Custom manufacturer of general purpose & substation transformers. Other products such as power distribution systems, grounding systems, switchgear, rectifiers, control panels & control systems can be fabricated. Services include design engineering, electrical construction, substation, high voltage, line construction, tower erection, traffic signal construction, preventative maintenance, testing, commercial, industrial wiring, plumbing, excavation, digging, trenching, site work & turnkey.
www.bjbaldwin.com/highvoltage.html

Siemens Medical Solutions USA - Malvern, PA
Manufacturer, Custom Manufacturer, Service Company
Manufacturer of substation transformers; power transformers rated 20 MVA & larger, for all voltages & for all types of units, including generator step-up transformers, autotransformers & LTC transformers. Also manufacture shunt reactors & phase-angle regulating transformers.