The Transformers Dry have many advantages compared to the submerged in liquid. These advantages can be operational, economic and environmental. Their reliability, low maintenance and reduced risk make them the best option for new electrical distribution projects. Economy, safety and environment, make them an Eco-logical solution.
Among the main ones we can find the following:
- Self-extinguishable. Low risk of fire
The insulation of the dry transformer with insulation made of epoxy resin and quartz powder, or polyester resin, or varnish, have the characteristic of being flame retardant, self-extinguishing and maintenance-free. This eliminates the need for firefighting equipment. They do not produce toxic gases.
. Do not use any type of insulating oil
Dry transformers only require air to cool. So, the extra work of: (a) Checking the oil level is eliminated. (b) Oil quality tests. (c) Recycling, moisture absorption tests, and dielectric tests.
- Ecologically friendly
Dry transformers have zero risk of leakage, as they do not contain any liquid inside. Likewise, they do not produce any type of pollution to the environment.
- High Security
In contrast to oil-cooled transformers, the dry transformer has a very low risk of explosion as it does not contain liquid.
- Low installation cost, Low loss, Low load
Transformers under load have almost no restrictions to be installed in any location. Additionally, they have no cost required for facilities that are required to protect deep waters from contamination because they do not contain any contaminating liquid.
- High Reliability
Dry transformers have a high MTBF *, about 2,100 years. They have a 20-year Useful Life ** and a very low failure rate.
- Low Maintenance
The dry transformers only need air for cooling, thus testing and analysis or insulating coolants is not necessary. The non-rough surface of its windings eliminates the accumulation of dirt even in the most extreme conditions. The only maintenance required is routine visual inspection by technical personnel, infrared camera analysis and external cleaning of the transformer when required.
- High capacity of Fast Overloads
Dry transformers are manufactured with a multilayer winding of the coils. In this way, manufacturers can ensure: (a) Safe handling of overvoltage; (b) Balanced stress across the coil. The multilayer winding also allows to introduce extra cooling ducts, and having a larger cooling surface produces a uniform temperature distribution.
- Resistance to cracking
Due to expansion, as a result of increased temperature, the transformer windings can crack. However, in glass fiber reinforced resin mold encapsulated dry transformers, this effect does not occur.
- Resistance to humidity
The complete immersion of the transformer coils in resin, and its curing in a vacuum, prevents the penetration of moisture inside the encapsulation. This also results in very low maintenance and very long dry transformer life.
- Low noise levels
The coil supports have spacers which isolate the vibrations from the iron core of the dry transformer. As a result, noise levels during operation are greatly reduced.
- Compact design
Dry transformers have a small bottom bearing surface. Likewise, they have a reduced weight because they do not contain any liquid.
- Vibration proof
For high vibration applications, in high motion locations, it is possible to have designs with more rigid structures with resistance up to 3G upon customer request.
- Correct operation in extreme conditions
The transformer can operate in conditions of high temperature, high humidity, and even in freezing conditions, including temperatures down to -30 ° C.
- Ecologically sustainable
The use of dry transformers contributes to saving natural resources and reducing CO2 emissions. Its design and operation are ecologically sustainable towards the environment:
Useful life of approximately 20 years.
It has a low own power consumption, low losses, which means less heating.
90% of the materials used in its construction are recyclable.
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