. In the context of dry-type transformer manufacturing, the vacuum
epoxy resin casting process is commonly used for electric
insulation. While there are different methods for casting resin,
including vacuum casting and atmospheric pressure gelation (APG),
the vacuum epoxy resin casting process is generally considered more
advanced and widely used.
The vacuum epoxy resin casting process, as described earlier,
involves encapsulating the transformer windings and core in epoxy
resin under vacuum conditions. This method ensures effective
impregnation of the resin and removal of air and moisture,
resulting in high-quality insulation.
On the other hand, the pouring process you mentioned is a more
traditional and less commonly used method for transformer
insulation. In this process, the epoxy resin is simply poured over
the windings and core without the use of vacuum or controlled
impregnation. While this process may still be utilized in certain
applications, it is generally considered less rigorous and may
result in lower-quality insulation compared to vacuum epoxy resin
casting.
It's important to note that advancements in technology and
manufacturing processes have led to the widespread adoption of
vacuum epoxy resin casting due to its superior insulation
properties, mechanical strength, and overall performance.
On the other hand, the APG (Atmospheric Pressure Gelation) process
is another method used for casting resin. In the APG process, the
resin is mixed with a catalyst and injected into a mold under
pressure, where it undergoes a chemical reaction to solidify and
form the insulation.
Both the vacuum epoxy resin casting and APG processes are used for
transformer insulation, but they differ in terms of the application
method and the equipment used.
Regarding the statement that the casting process is the most
rigorous and primitive process, it's important to note that the
casting processes, including both vacuum epoxy resin casting and
APG, have their own advantages and considerations. The choice of
process depends on factors such as the specific requirements of the
transformer, production volume, equipment availability, and
industry standards.
While the vacuum epoxy resin casting process is generally
considered more widely used and advanced, the APG process is also
popular in certain regions or industries. The APG process can offer
advantages such as shorter curing times and the ability to produce
large units. However, it may require specialized equipment and
molds.
Ultimately, the selection of the casting process depends on various
factors, and both vacuum epoxy resin casting and APG have their own
merits and applications. It's important to evaluate the specific
requirements and constraints of a project to determine the most
suitable casting process.
