GNEE Steel 1500 kva dry type transformer

1. What is dry type transformer?

 

dry-type transformer is a completely stationary solid-state device and it requires less maintenance to provide service with few failures. This transformer does not contain any moving parts. Unlike liquid-filled transformers, this transformer uses only high-temperature insulation as they are very environmentally safe. These transformers provide a stable and safe source of electricity without the need for a fire pit, which would otherwise emit harmful gases.

Image 1: MBT dry-type transformers

2. Difference between dry-type and oil-type transformers

Dry-types transformes and oil-filled transformers (Also known as oil-immersed transformers, liquid filled transformers). They serve as the same purpose, but have major differences of construction. These differences make certain types of transformers are better for certatin situations.

 

 

 

 

 

In general, oil-filled transformers require more frequent maintenance procedures than dry-type transformers.

 

 

 

 

Oil-filled transformers are generally cheaper than dry-type variants, with some exceptions.

 

 

Transformers are commonly known to be noisy when they are running. With that said, oil-types transformers run quieter than dry-type transformers.

 

 

Oil-filled transformers are known to be more efficient than dry-type transformers, which are limited in their voltage rating and size.

 

This makes dry transformers susceptible to overheating if they are overloaded and it is important to remember that their performance is limited under overload. As a result, maintaining dry-type transformer power is also more costly over time.

 

Those are the main differences that exist between oil-type transformers and dry-type transformers. Your choice of transformer will depend on your safety requirements and your purchase budget.

 

3. How many types of dry-type transformers

There are two types of dry-type transformers:

Cast Resin Dry Type Transformer (CRT) (Imange 3)

Vacuum pressure Impregnated Transformer (VPI) (Imange 4)

Image 3: Cast Resin Dry Type Transformer (CRT)

 

Image 4: Vacuum pressure Impregnated Transformer (VPI)

4. Application of dry-type transformer

Due to safety factors, there are some applications of dry-type transformers