Changgao Electric Group Co.,Ltd (China)

HUNAN CHANGGAO HIGH VOLTAGE SWITCHGEAR GROUP CO., is a non-public high-tech enterprise producing high-voltage and ultrahigh-voltage switchgears for large-scale power plants and power transmission and transformation stations. Its major products are indoor and outdoor high-voltage isolating switches and grounded switches of 550kV or below 550kV, outdoor high-voltage SF6 circuit – breakers of 40.5kV and outdoor high-voltage falling type fuse cutouts of 40.5kV or below 40.5kV. It has over 200 sets of mechanical processing equipment including horizontal and vertical digital control process center and digital control machines, wire-cutting machines, digital control soft connecting diffusion welding, power frequency withstand test equipment of 800kV and temperature rise equipment of 8000A and a completed inspection and testing equipment. It ranked first for several times in bidding appraisal in State Grid, South Grid and other large-and-medium-sized transformation stations and power plants projects.