A dry type model of a transformer doesn’t use any insulating oil or coolant to immerse the windings with core. Dry type transformers India use air pressure to cool down the temperature. The category of dry transformer is not limited to one model but for two. Yes, when you visit the manufacturer’s outlet, you will find cast resin dry type transformer and vacuum pressure impregnated transformer.
Let’s discuss the CRT or cast resin dry type transformer:
Cast resin dry type transformer is used by the industries located at high moisture prone areas. It is due to its primary and secondary windings that are encapsulated with epoxy resin. This encapsulation helps in preventing moisture content to enter and affect the winding stuff. Manufacturers and engineers achieve the complete protection by the cast resin encapsulation, so that the transformer can work without any disruption even in highly moisture prone area.
You can avail cast resin dry type model of the transformer in ratings of 25 KVA to 12,500 KVA. There are major advantages of cast resin dry type:
- Better overload capacity
- Low loss and low partial discharge
- Great efficiency
- Non inflammable winding insulation
- Zero risk to fire
- Best for indoor installation
- It is hygroscopic
Vacuum pressure impregnated transformer
Manufacturers intend and craft vacuum pressure impregnated transformer with least flammable material as insulation of windings. They prepare windings for this transformer in foil or strip in a continuous layer. For higher voltages, the winding is prepared of disks that are connected/linked in series or parallel as per power rating to meet voltage level.
You can avail these types of transformers from 5KVA to 30MVA. Major advantages of vacuum pressure impregnated transformer are:
- High mechanical strength
- No temperature fluctuation
- Void free insulation
- Easy to maintain
- Less prone to fire hazard
Benefits of using dry transformers
Dry type transformers are best for fire prone locations.
- These transformers provide safety for property and people
- It is best environment friendly product
- It is maintenance free
- It is easy to install
- Side clearance is less
- It supports overloads
- No fire hazard
- Superb resistance to short circuit shocks
- Suitable for contaminated and damp sites
Major industries like chemical, gas, and oil industries are using dry type transformers and are satisfied with the performance. There are manufacturers of Dry type transformers India, such as Royal transformers that supply their product ranges to rest of the world. You can talk to them and get a quote as per your requirement. You can even share your thoughts for this post.