Porcelain Bushing Insulator

Product Details

Porcelain is a ceramic material and a good ceramic is free of internal densities, holes and cracks formation without thermal expansion.A porcelain is made of china clay which is naturally available as Aluminum Silicate. The mixture of plastic cauline, feldspar (crystal stone of silica), and quartz (Silicon Dioxide “SiO2” are heated up in the kiln furnace at controlled temperature to make a smooth, tough and shiny insulator without porous.A strong porcelain insulator has a dielectric strength of 60kV/cm, compressive strength of 70,000 kg/cm2 and tensile strength about 500 kg/cm2.

Type and usages of porcelain bushing insulators

1. ordinary porcelain bushing insulators: used in general transformer or reactor, can be used in the low voltage and medium voltage.

2. high-voltage porcelain bushing insulators: used with high-voltage systems connected to the transformer, and can withstand higher pressures.

3. organosilicone porcelain bushing insulators: composed of organosilicone resin and ceramic material, has the advantages of small dielectric constant, low dielectric loss, etc. It is mainly used for supporting the insulation support of high-voltage windings.

Porcelain casing as the core component of the transformer, bear the insulation support and heat dissipation of the dual role, can effectively protect the normal use of the transformer.

Insulator bodies, when assembled with specific electrical hardware, become bushings designed for specific ratings and applications.