DHi (Defense Holdings Inc.) of Manassas Park, Virg. and H&N Electric from Pasco, Washington, recently conducted an up-tower inspection of DHi’s revolutionary blade pitch control slip ring featuring HiPerCon Brand metal fiber brushes (electric brushes) after one year of slip ring operation at PacifiCorp, Inc.’s Leaning Juniper Site in Arlington, OR. The DHi slip ring had operated trouble- and…
DHi sets industry benchmark with UL certification of its wind turbine pitch slip rings
Defense Holdings, Inc. (DHi) is raising the bar for the wind industry, having recently received unrestricted certification from Underwriters Laboratories (UL) for its pitch-control slip rings with HiPerCon metal fiber brushes. With this significant accreditation, DHi becomes: Only the second company to achieve a UL listing for WTG pitch slip rings, The first and only…