Any transformer must include transformer bushings. They make it easier for a current-carrying conductor to pass through the grounded transformer tank. The high voltages and currents present in a transformer must be withstood by bushings, and they must be able to do so safely and reliably.
Manufacturing process
Depending on the type of bushing, different manufacturing techniques are used to create transformer bushings. However, the following are the fundamental steps:
- A substance with a high conductivity, like copper or aluminium, is used to create the conductor.
- Porcelain, oil, or gas are examples of materials that can withstand high voltages and moisture and are used to make insulators.
- Together, the conductor and the insulator are put together.
- To make sure the bushing satisfies the necessary requirements, it is tested.
Testing
Transformer bushings are put through a number of tests to make sure they meet the necessary requirements. These tests consist of:
High voltage test: The bushing will be tested to see if it can resist the highest voltage that will be applied to it.
Dielectric strength test: Through this test, it is confirmed that the bushing can endure the intense electrical strains found in transformers.
Mechanical strength test: This test makes sure that the bushing can withstand the forces that are given to it mechanically, such as the conductor's weight and the forces produced by the current running through it.
Corrosion test: This test makes that the bushing is durable enough to endure the environment where it will be put.
To guarantee the security and dependability of transformers, the production procedure and testing of transformer bushings are essential. Manufacturers may build bushings that can survive the demanding circumstances of the electrical grid and offer years of dependable service by adhering to these exacting criteria.
