Major advantages of cast resin transformers make the units most suitable for different installations.
Manufacturers themselves say that their cast resin transformers are best suited for most installations. The main benefits of oil transformers can be explained in three characteristics –
- Reduction of environmental impact
- Simplification of installation
- Flexibility in use
Reduction of environmental impact
There is higher safety, no cooling fluid, low Co2 emission, and recovery of materials at the end of life. Each of them plays a critical role in the reduction of environmental impact. Let’s talk about each of them in detail.
Higher safety (low fire risk)
Credit goes to the high-quality epoxy resin used for manufacturing transformers as it helps reduce environmental impact to a minimum and conform to the international environmental standards. Cast resin units are entirely made of flame-retardant and self-extinguishing materials. Thus, it reduces inflammability and minimizes the emission of toxic gases and opaque smokes. You can install these units in damp, dusty, saline or polluted environments. Cast resin transformers offer high resistance to thermal shock.
No cooling fluids required
Due to nil use of cooling fluids, cast resin transformers don’t pollute the environment and in case of fire, they emit minimum polluting gases as compared to insulating liquid filled transformers.
Recovery of materials at the end of life
Manufacturers of cast resin units are actually contributing a lot to the environment. It’s because these units don’t cause pollution even when their working life is over. At the end of the disposal, the resin is taken as an inert material, while the primary and secondary winding can be recycled by manufacturing facilities.
Low CO2 emission
When the consumption of the transformer gets low, it automatically affects the emission of CO2 in a positive way. Low CO2 emission means a healthy environment.
Simplification of installation
Reduction of building laying works
Cast resin models don’t require expensive civil works that is a basic need for oil-filled transformers, such as collection pits, fire resistant separation barriers, extinguishing grids, etc. to prevent the propagation of fire and the spreading of insulating liquids. There is no need for separation provision with a fire barrier in the case of cast resin units.
Installation inside buildings
The features like a reduction of expensive building work, low fire risk, and no use of cooling liquid make installation of cast resin units possible inside the buildings. You can even place them near to rooms that are accessed by people.
Flexibility in use
Greater overloading capacity
As cast resin units work on air cooling principle and take longer to reach operating temperature, you can expect them to be overloaded more than any other insulating liquid transformers. This makes cast resin models suitable to feed loads with frequent current breakaway starting current.
Reduction in maintenance
Cast resin transformers don’t require much maintenance since they are inspected regularly by the team to ensure that there is no accumulation of dust and dirt. However, things are different with oil transformers as they require proper testing of insulating liquid from time to time.