Description:
A dry-type transformer vacuum epoxy resin casting plant is a facility where dry-type transformers are manufactured using the vacuum epoxy resin casting process. This process involves encapsulating the transformer windings and core in epoxy resin under vacuum conditions, which provides electrical insulation and protection against environmental factors.
Here's a general overview of the process and the components involved in such a plant:
Core Assembly: The transformer core, made up of laminated magnetic steel sheets, is assembled to create the desired shape and configuration. The core provides the magnetic path for the transformer.
Windings: Copper or aluminum conductors are wound around the core to create the primary and secondary windings. The windings carry the electrical current and induce voltage transformation.
Insulation: Insulating materials such as Nomex paper or polyester film are placed between the layers of windings to provide electrical insulation and prevent short circuits.
Vacuum Chamber: The transformer assembly is placed in a vacuum chamber, which allows for the removal of air and moisture from the system. This step ensures that the epoxy resin can penetrate and encapsulate the windings effectively.
Epoxy Resin Mixing and Heating: Epoxy resin, along with suitable hardeners and additives, is mixed in precise proportions to create a viscous liquid. The resin mixture is then heated to reduce its viscosity and improve its flow properties.
Resin Casting: The heated epoxy resin is poured into the vacuum chamber, where it fills the voids and encapsulates the windings and core. The vacuum helps remove any remaining air bubbles and ensures complete impregnation of the resin.
Curing: Once the resin is in place, the transformer assembly undergoes a curing process. The resin is hardened through a combination of time and temperature, allowing it to solidify and form a rigid, durable insulation system.
Finishing and Testing: After curing, the transformers undergo various finishing processes, such as trimming excess resin and cleaning the surfaces. They are then subjected to electrical tests, including insulation resistance, partial discharge, and other performance evaluations to ensure quality and compliance with standards.
The dry-type transformer vacuum epoxy resin casting process offers advantages such as improved insulation properties, increased mechanical strength, reduced maintenance requirements, and enhanced protection against moisture, dust, and other contaminants. It is commonly used in applications where safety, reliability, and environmental considerations are important, such as power distribution networks, renewable energy systems, industrial facilities, and commercial buildings.
Basic Info.
