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Dry type transformers are class 'C' type insulated. The insulating materials used for these type of Transformers, having high dielectric strength and are capable to withstand high temperature. The temperature withstanding capacity is generally made to comply with IEC 76/IS 2026/IS 11171
Dry Type transformers are available in the following versions
 
Open execution type for installation in an existing panel or enclosure.
Well-Ventilated enclosure with lip cut louvers and baffles for indoor installation.
 
Non Ventilated enclosure for outdoor installation.
Dry Type Transformers have the following advantages
 
Use of non-biodegradable materials makes these suitable for strict environmental conditions.
 
No fire or explosion hazards because of use of non-flammable materials and absence of any liquid insulation.
 
Non-requirement of oil sump makes these ideally suitable for installation near load centers thus reducing cabling costs and improving voltage regulation.
Zero Maintenance
 
Drastically reduced maintenance and clear looks due to the absence of any insulating liquid.
 
A life cycle analysis would revel the cost - effectiveness of Dry Type Transformers in long run through it requires a higher initial cost.
 
Easy handling and access to active parts for inspection.
Dry type Transformers are ideally suitable for installations in
 
Underground gassy mines.
 
Petrochemical refineries
 
Multistoried buildings.
 
Business Blocks & Supermarkets.
 
Congested Metropolitan urban areas.
 
Underground Railways.
 
Airports.
Range
Present product range includes transformers up to 3000 KVA, 11KV / 33KV class.
Electrical Components
The coils and all current- carrying parts - are vacuum impregnated with silica-varnish or resin casted under vacuum in a controlled environment preventing contamination by ambient outdoor air, industrial environments, salt spray and other.
Testing  

The coils and later the core and coil assembly are tested before proceeding to the next stage. All routine tests are performed on all completed as per IS/2026.

Satisfied Customers

Name of the Firm

Transformers Specification
Nos.

Vardaan Market (Verdaan Improvement Pvt. Ltd.)
Kolkata

1600 KVA, 6000/415 Volts
1
Diamond Group (Stellar Properties (P) Ltd.)
Kolkata
1500 KVA, 6000/415 Volts
1
Berger Paints India Ltd.
Jammu
1250 KVA, 11000/433 Volts
1
Metro Railway
Kolkata
1000 KVA 11000/415 Volts
3
Haldiram Bhujiwala (Ruby Developers Pvt. Ltd.)
Kolkata
750 KVA, 6000/433 Volts
 1
Regent Market (Bhagwati Plasto Works (P) Ltd.)
Howrah
750 KVA, 6000/415 Volts
1
Star Theatres
Kolkata
630 KVA, 600/433 Volts
1
Globe Theatres Pvt. Ltd.
Kolkata
500 KVA, 6000/415 Volts
1
Metro Railway
Kolkata
315 KVA, 11000/433 Volts
1
Lux Group (A.B.Industries)
Kolkata
200 KVA, 11000/433 Volts
1