Take You To Understand The Relevant Knowledge Of Transformer Bushing

Transformer bushing:
1, 40kV and below pure porcelain insulation sleeve
This kind of casing has two kinds of structure: guide rod type and cable type. Guide rod type for transformer low voltage bushing; Cable type for 10~20kV high voltage outlet.
2, 40kV and below large current bushing
This kind of bushing has two kinds of structure: guide rod type and capacitance type. Guide rod type pure porcelain bushing is used for low voltage winding of medium capacity generator transformer. Capacitive bushing is used for low voltage winding of large generator transformer.
3, 66kV and above oil-paper capacitive bushing
The inner insulation of the sleeve is a capacitor core which is alternately wound by insulating paper and aluminum foil. The capacitor core and the porcelain sleeve are filled with insulating oil. The connection between the sleeve and the winding has two structures: guide rod type and cable type. The oil paper capacitor core is alternately wound on the conductive tube by 0.08-0.12mm thick cable paper and 0.01mm thick aluminum foil.
4, 66kV and above adhesive paper capacitive bushing
The inner insulation of the sleeve is a capacitor core which is alternately wound by adhesive paper and aluminum foil. The capacitor core is filled with insulating oil between the capacitor core and the porcelain sleeve, and the lower part of the sleeve does not need the porcelain sleeve. However, the tanδ of this sleeve is large, and the adhesive paper is prone to crack and generate partial discharge, and the production has been stopped.
5, resin pouring capacitive sleeve
The main insulation of this kind of sleeve is also a capacitor core made of insulating paper and aluminum foil alternately wound, and the epoxy resin is poured outside to become a solid insulating sleeve.