20NF 250 Porcelain Transformer Bushing Brown ISO DIN 42531 Standard 11kv

20NF 250 Porcelain Transformer Bushing Brown ISO DIN 42531 Standard 11kv. Its breakdown field strength can reach 30kV/mm, far exceeding glass (20kV mm) and resin (15kV mm). Excellent electrical insulation: The insulation strength of porcelain bushing is much better than that of conventional materials. Long service life: Made of inorganic materials, its performance hardly deteriorates over time, and its design life can generally reach 20-30 years. During operation. Excellent weather resistance and corrosion resistance. Unparalleled reliability: Porcelain sleeves have a history of over a hundred years of application in power systems and are a proven, highly mature, and reliable technology.