Electrical bushings are usually used as a way of taking out/in the power
from a machine without touching the ground parts. It can also be used in various other applications - called ‘through-wall’ bushings.
Electrical bushing consists of a hollow insulator and a conducting stud or bus bar.
The three typical material of electrical bushing
Composite electrical bushing : Because of its natural flexibility and ability to withstand impacts, it is well used in applications of high vibration and possible urban vandalism. The color can be brown or grey.
Porcelain electrical bushing: With the advantages: low cost, long life and maintenance-free, the porcelain electrical bushing is able to withstand all environmental conditions. For a given rating voltage porcelain insulators can be provided with varying creepage distances.
Selection of electrical bushings
Electrical bushings are typically chosen using the following characteristics:
• Transformer type.
• Bushing type
• Basic Impulse insulation Level
• Bushing operating Voltage – normally expressed in kV
• Bushing current carrying capacity
• Creepage / Protected creepage
• Connection type
• Required Regional or Industry Standard.
Orient insulators are designed to help the engineer to choose the correct bushing for the application, and produce the electrical bushing as customers’ required.