Transformer bushing :why it is needed:Types of bushing

• Posted by Yash Highvoltage August 8, 2023 Filed in Technology #Transformer Bushings  127 views
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  An electrical conductor can safely pass through a conducting barrier, such as the case of a transformer or circuit breaker, with the help of a transformer bushing, which acts as an electrical insulator. Bushings are commonly constructed of porcelain, although they can also be made of other insulating materials as polymer, ceramic, glass, etc.

  What is a transformer bushing used for?

  Transformer bushings are used to:

  • Between the transformer windings and the exterior circuit, provide electrical insulation.
  • Permit sparking or arcing-free passage of high-voltage current via the transformer.
  • Support the weight of the conductor.
  • Defend the conductor against mechanical harm.

  Types of transformer bushings

  There are two main types of transformer bushings:

  • Solid bushings: These bushings are constructed from one continuous piece of an insulating material, such porcelain. They frequently function in low-voltage applications.
  • Capacitance-graded bushings: The insulating substance of these bushings contains a number of conductive layers. The insulator is not put under as much stress thanks to the capacitance between the layers, which aids in an even distribution of the electric field. High-voltage applications frequently employ bushings with capacitor gradations.

  Why are transformer bushings needed?

  For transformers to operate safely, transformer bushings are necessary. Without them, the transformer case and the high-voltage wires would be in direct contact, increasing the risk of arcing, sparking, and even fire. The conductors are additionally shielded from mechanical harm by bushings.

  Maintenance of transformer bushings

  Transformer bushings should be checked for signs of damage on a regular basis. A bushing should be replaced right away if it is cracked, chipped, or otherwise damaged. To guarantee optimal operation, bushings should also be cleaned and lubricated on a regular basis.

  
  A transformer's bushings are an essential component. They support the conductor's weight, offer electrical insulation, and shield it from mechanical harm. Bushings should be frequently checked for damage indicators and replaced as necessary.

  Read more Bushing : Transformer bushing: what is transformer bushing :why it is needed:Types of bushing