Dry Type Transformers

VPI / Cast Resin
5 Kva – 2.5 MVA , Up to 11 Kv Class

We manufacture Vacuum Pressure Impregnated Transformers with Conventional & Corrugated Enclosures as per Customer requirement. These Transformers are specifically needed in distribution networks for feeding basements or stilts of high-rise structures, Hotels, Air Ports , Residential Complex, Malls, stadium, chemical & refinery plants, Distribution Net works.

A dry type transformer does not use a liquid cooling agent. Instead of oil, circulating air protects the coils – windings and insulation – from overheating. Within the transformer, manufacturers have multiple options for the components used for insulation, windings and core materials. The quality of materials and construction determine the operating temperature range and ultimately the useful life of a transformer.

Key Benefits

High temperature resistant materials are used including Nomex Aramid papers, silicone coated fibre glass and pressure sensitive glass tape.
Adequate ducts between coils, discs for maximum air circulation and reduced hot spot temperature.
Self-extinguish type with higher resistance to fire than oil
Suitable for harmonic loading.

Dry Type Transformer Applications

ATLAS dry type transformers provide efficient and reliable power to the following industries:

Operational manual for Dry type transformers

General Specification

Duty, Type

Outdoor / Indoor Ground Mounted Type

Voltage Class

UPTO 22 kV

No of Phases

3 Phase

Frequency

50/60 Hz

Vector Group

Dyn1 or Dyn5 or Dyn11 or any specific

Class of Insulation

F or H with Temp Rise of 90 or 115 Deg C or as per customer requirement

Tap Changer Type

Off Circuit Type or On Load Type + 2.5% X 2 for OFF CIRCUIT TAP CHANGER or + 2.5% X 2

Tapping Range

& - 2.5% X 6 for OFF LOAD TAP CHANGER or as per customer requirement

Winding Material

Aluminium Or Copper with multi paper NOMEX-ARAMID covering

IS Standard

IS 11171 , IEC 60076, ANSI

Quick Delivery

We stock dry type transformers up to 1000 KVA ratings. We normally maintain 95% availability of units in these popular ratings, so that we can ship from stock within 24-48 hours. If you have unique specifications, we can also build a new dry type transformer for you. In case of emergency, We can quick-ship from stock, and we strive to respond to service requests within 24 hours, saving you time and money. Our Rapid Response Team can help you restore power and get back in operation quickly.

Long Life

Because we use quality materials in their construction, our dry type units have an expected useful life of 30 years or more, and require little or no maintenance. Their resistance to short circuits and excessive heating minimizes the chances of premature failure.

Lower Fire Risk

Enclosing the coils in a polyester varnish coating greatly reduces the risk of fire and isolates them from moisture. Dry types do not contain any combustible oil coolant; consequently, they provide a safer option in potentially hazardous areas such as forests, petrochemical plants or chemical manufacturing facilities.

Easy Installation

With options for either indoor or outdoor enclosures, the installation of these transformers is simple and easy. While this greatly reduces any downtime, we go one step further – offering offer a customized retrofit solution that leaves our facility as a perfect “plug and play” for your facility.

Pollution Free

Dry type transformers contain no liquids that can leak out and contaminate an area. Dry types provide pollution-free operation, making them useful in areas sensitive to liquid or chemical contamination.

Suitable for a Variety of Environments

Because many models provide moisture protection of the inner coils or cores, these transformers can work indoors and outdoors in dry and moist conditions. Additionally, because these transformers have proven to perform through some seismic events, they are ideal for earthquake prone areas where building codes may require equipment to have this protection. Dry Type Transformer Applications

Dry Type Transformers