Dry Type Transformers, Cast Resin Dry Type Transformer, Dry Transformer, Mumbai, India

Dry Type Transformer

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Industrial, Substation & Distribution purpose Manufacturing range Upto 2MVA 22 KV naturally air cooled. These transformers are generally smaller in dimensions and lesser in weights. The construction and installation cost for the sub-station can be reduced by adopting dry type transformers.

Without fire or danger of explosion, it is possible to place the transformers near to the load centre. Also, these transformers do not need construction of special fibre brick walls or oil pits, which reduces the overall civil works. Since no oil is used in these transformers, there are no chances of contamination of ground water due to oil leakage.

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Dry (VPI) Transformers

Industrial, Substation & Distribution purpose Manufacturing range Upto 2MVA 22 KV naturally air cooled. A dry type transformer has an iron core, vacuum pressure resin impregnated high voltage windings and low voltage windings . The low voltage winding is constructed with conductors. Dupond nomex insulating material includes an apparatus to secure the windings in place during a vacuum and pressure resin impregnation process. The result is

a coil that exhibits high short circuit protection due to the tightly bond conductors comparable to completely resin encased molded transformers at a substantially reduced cost.
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Cast Resin Dry Type Transformer

In cast-resin dry-type transformers, the complete encapsulation of primary and secondary winding in epoxy resin prevents penetration of moisture into windings. The cast resin offers very good protection against adverse ambient conditions. These transformers can work without disruption of service at 100% humidity. .

Due to the high grade insulation material, coils are non hygroscopes & the transformer can be switched on directly without pre-drying even after a long period of service interruption.
Contrary to the conventional dry type transformers the cast coil transformers are better in respect of impulse voltage withstand strength.

Higher dynamic short circuit withstands strength as compared to oil immersed and conventional dry type transformers because of fibre glass reinforced epoxy encapsulation. No partial discharges can occur during operation. The insulation material used is glass fibre reinforced with epoxy resin of class 'F' which can withstand wide temperature variation. Due to high quality insulation material the transformer is practically non-inflammable by an electrical arc, special fire protection measures are not required.

Due to encapsulation of coils with cast resin the coils dimensions are stable & no coil tightening is required to maintain the short circuit strength. Also no check of oil level and electrical insulation/oil is required. This leads to saving in cost on account of maintenance.
As cast resin transformers are solidly cast, problem associated with oil filled transformers like oil leakage and pilferage of oil is completely avoided.

These transformers are generally smaller in dimensions and lesser in weights. The construction and installation cost for the sub-station can be reduced by adopting dry type transformers.
Without fire or danger of explosion, it is possible to place the transformers near to the load centre. Also, these transformers do not need construction of special fibre brick walls or oil pits, which reduces the overall civil works. Additionally, since LT cables are not required, thers is also saving in cost on account of expensive cable laying works.

Since no oil is used in these transformers, there are no chances of contamination of ground water due to oil leakage.

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About Us

URJA is managed by a group of technocrats having vast and varied experience in transformer design, development, production, quality control and servicing. Its modern manufacturing plant with state-of-the-art manufacturing and testing facilities as per IS, IEC & ANSI standards, accredited to ISO-9001:2000 by Moody International for design, manufacture, marketing and after sales service, believing in producing energy efficient products. URJA is awarded with ‘CE’ certification which stands for ‘CONFIRMATIVE EUROPEENNE ‘ and conformity to European Standards meeting basic requirements of Safety, Health, Environment and Protection

Exports

Low Loss High Efficient Transformers are exported to Europe, Africa, Middle East, and Asian Countries.
URJA has rendered its services to Central and State Governments, MNCs, Public and Private Sectors, Medium and Small Units, State Electricity companies, Defence, Mining and Power Industries.

Up-gradation, Repair & Overhauling

URJA’s site operations are divided into three major segments such as (a) Oil Filtration (b) Testing and (c) Maintenance, encompassing the following facilities viz. (i) Annual Maintenance contracts (ii) Earth/Structure testing (iii) Sub-Station/Control Panel/Standby/D.G. erection and maintenance. URJA is well positioned with all machinery, tools and testing equipments to carryout these facilities.
URJA repairs, refurbishes and upgrades Transformers up to 10 MVA, and has complete facilities available for augmentation and repairs.

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Communication Details
Urja Techniques (India) Private Limited
B-17, Shri Ram Industrial Estate, G. D. Ambekar Road, Wadala, Mumbai - 400 031, Maharashtra, India.
Phone : +(91)-(22)-24150505 / 40670500 / 40670515 Fax : +(91)-(22)-40670514