A Dry Type electric transformer is made up of various components to ensure safe and efficient functionality. The Dry-Type electric transformer is most commonly used on small and medium-scale setups.

The Dry type transformer is a solid-state transformer. It does not have any rotational parts and doesn’t need any liquid or oil to operate. The core and windings of a Dry Type Transformer are positioned inside a pressurized air-sealed tank. One can install a Dry Type Transformer in a different indoor chamber. Certainly, the installation process of a Dry Type Transformer is a bit complicated. The ground base of the transformer should have reliable grounding.

Types of Dry Type Electric Transformers

There are two types of Dry Type Electrical Transformers:

  1. Cash Resin Dry Type Transformer
  2. Vacuum Pressure Impregnated Transformer

Cast Resin Dry Type Transformer

Epoxy resin encodes the primary and secondary windings of the Cast Resin Type Transformer. The epoxy resin shields the windings from moisture and humidity. Hence Cast Resin Transformers perform well in locations that experience high humidity.

Cast Resin Dry Transformer benefits include:

  • Greater Effectiveness
  • Not hygroscopic
  • Suitable for installation inside
  • No danger of fire accidents

Vacuum Pressure Impregnated Transformer

The primary and secondary windings of Vacuum Pressure Impregnated transformers are insulated with less-flammable material. Furthermore, the windings are made up of foil or strips and insulated with class H polyester resin.

After the insulation, the primary and secondary winding are placed in a vacuum protective box.

The windings are composed of disks coupled in series and parallel for greater voltage levels. Furthermore, the advantages of Vacuum Pressure Impregnated Transformer are mentioned below:

  • Less inflammable
  • Moisture protection
  • Low maintenance
  • Less vulnerable to fire

Advantages of Dry Type Electric Transformer

  • The Dry type Electrical Transformers are convenient for contaminated and damp areas
  • These transformers are highly efficient and useful in the long run
  • The risk parameter for fire accidents is very low
  • The Dry Type Transformer offers exceptional short-circuit resistance
  • Requires low maintenance & has a simplified installation process
  • These transformers can easily manage overloads because they have high capacity
  • The pollution emission is also negligible

Disadvantages of Dry-Type Electric Transformer

  • The Dry-Type Transformers function effectively and durably. But in case of failure or damage, the whole structure needs to be changed
  • Dry-Type Transformers are more expensive than oil-based transformers

Important considerations for designing Dry Type Electric Transformer

Below are the critical design considerations according to leading Dry Type Transformer Manufacturers in Canada.

1.  Insulation material

The F and H class insulation material is used to insulate the primary and secondary windings. One must consider following insulation factors.

  • Mechanical strength
  • Thermal shock
  • Dielectric strength

2. Winding material

Copper and aluminum are used to make windings. Copper coils are stronger mechanically than aluminum coils.

3. Choosing a low hysteresis loss core material

To be more efficient, the transformer’s core needs to have high permeability and little hysteresis loss. CRGO steel is the core material. Additionally, higher permeability and little hysteresis loss are features of CRGO steel.

4. Regulation

One can improve the transformer’s ability to regulate voltage by keeping the leakage resistance at the minimum level. The leakage reactance is typically limited to 2% or less. Certainly, one should rely on seasoned manufacturers offering dry type transformers in Canada.

5. Lifecycle

The insulation’s usable life affects the transformer’s lifespan. Furthermore, the rise in temperature must be calculated at the design phase of the transformer. Certainly, it helps in increasing the life expectancy of transformer.

6. Losses

Using a CRGO core and minimizing the leakage reactance helps reducing the no-load losses to the absolute minimum.

7. Overloading

If the load rises above the rated kVA, the transformer is considered to be overloaded. There should be a cooling system to handle the temporary overload of the transformer.

8. Level of Insulation

Insulation level adjustment is a crucial component in transformer design. Undoubtedly, optimal insulation helps in increasing a transformer’s lifespan.

Dry Type Transformers Canada

Electric Power Inc. based in Mississauga, Canada, offers a wide variety of Dry-Type Transformers. It is one of the leading Dry Type Transformer manufacturers in Canada. Additionally, you will find transformer models available in multiple sizes, and voltages for home and commercial usage.

Conclusion

There is an outlet in transformers to release the generated heat. Hence, to prevent the device from combusting, cooling it down is crucial. In Dry Type Transformers natural air works as a cooling medium. Additionally, the Dry Type Transformer is less vulnerable to fire accidents due to the unavailability of flammable liquids.