In 1904 Haefely was founded based on patented design for manufacturing resin-impregnated paper insulators, the company grew fast and expanded into high voltage testing in 1922. Over the years, company become specialized in the fabrication of electrical apparatus, bushings, and capacitors in insulation technology and high voltage testing equipment. All Haefely test equipment is manufactured in Switzerland to exacting Swiss craftsmanship standards. This clearly expresses its pledge to Swiss Quality to provide premium products at a very competitive price.