what is dry type transforme and oil type transformer?

Dry-type and oil-type transformers are two different technologies used for stepping up or down voltages in electrical systems. Here’s a brief overview of each:

 

 

Use air as the cooling medium.

Often referred to as “cast resin transformers.”

Environmentally safer due to the absence of oil, reducing the risk of fire.

Suitable for indoor installations, such as in commercial buildings or hospitals.

Typically limited to a maximum voltage of 35kV due to cooling constraints.

Tend to be larger in size and may have higher operating losses compared to oil-filled transformers.

 

Use oil (usually mineral oil) as the cooling and insulating medium.

The oil helps control the temperature and dissipates heat through radiators.

Can reach higher voltage capacities, sometimes up to 1000kV.

Generally more efficient with a longer lifespan and lower operational costs.

Due to the presence of oil, they are better suited for outdoor installations where there’s less risk of fire spreading.

 

When choosing between the two, factors like maintenance, operational cost, noise, energy efficiency, and installation site are considered. Oil-filled transformers require more maintenance but are often more cost-effective in the long run. Dry-type transformers, while having higher initial operating losses, are preferred for their safety and lower environmental impac