porcelain bushing/ceramic bushing/hollow insulator/hollow bushing/porcelain shell
Transformer porcelain bushing is used to take the high voltage and low voltage down-lead within the transformer out of the oil tank. It is not only the insulation to the earth for the down-lead but also a supporting and fixing part. Therefore, the transformer hollow insulator must meet the electrical and mechnical strength shown in the manufacturing standard.
Middle voltage transformer can use ceramic/porcelain bushing insulator; high voltage transformer normally uses oil immersed porcelain bushing and capacitive ceramic bushing insulator.
Transformer bushing insulator has various of shape:
ANSI thread porcelain bushing insulator
with semi-conductor glaze or
DIN transformer bushing South African transformer bushing
Transformer accessories: transformer sleeves,butterfly valves, valve-s,ball valves,moisture absorbers and insulators for transformer.
DIN transformer bushing accessories assembly