Oil Type Transformer is a mature and technical product and its life story is closely linked to the history of the application of electrical energy starting in the last decades. Based on just one fundamental physical principle, the induction and the basic design features never changed since then. Transformer are needed to feed most of the equipment and apparatus of our daily use which from our personal and public technical environment as well as high power industrial equipment for diverse applications power to voltage range from VA to GVA and mv to MV. Owed to such flexibility the transformer is the most imp link for transmission and distribution of electrical energy from the producer to customer.
Whereas the basic design and principle of transformer – core windings, insulation system remain more or less unchanged there was a tremendous improvement of the specify design and properties in the past.
Transformers and oil have always been synonymous with electric power. Conventional Oil Type Transformers use mineral base insulating oil as the medium for cooling and insulation.
Optimum Design & Features
By using CRGO silicon steel mitred cores and paper enamel covered conductors, the units are made compact, resulting in lower losses, better regulation and longer life. Windings are designed to withstand sufficient thermal, dynamic and electrical strength induced during operation as well as under short circuit conditions. Winding on HT side is provided with sufficient end-turn reinforcement for extra strength. Radial as well as axial clearances and cooling ducts provided for the coils add to the safety and uniform cooling of the windings and limbs.Each tank is pressure tested and the exterior surface is coated with primer and 2 coats of weather-proof paint. The interior is given anti corrosive protection with oil resistant varnish. Transformers are supplied with first filling of insulating oil conforming to IS-335/1 980
For more information you can visit website:www.sudhirpower.com
Concerning the transformer for a long time economical consideration were limited to purchase price and loss evaluation with depreciation figures based on the long pay back. Sudhir Transformers is in operation in India and abroad since 1969, Manufacturing of power transformers is still mainly hand work done by skilled workers.
Voltage regulation is provided with winding tappings as per customer’s specifications generally at +/-5% of input voltage. As a standard, tap changing is effected by means of externally hand-operated ‘OFF CIRCUIT’ tap changing switch.
On Load Tap Changers (OLTC) with a variety of steps that provide optimum control can be offered. All tap changing switches have indicators and locking device. Special multi-tapping transformers are also in the product range, besides the special duty transformers.
Every transformer undergoes a series of tests throughout the manufacturing process, rightfrom raw material stage. All routine tests are carried out at our works as per IS 2026, lEC 60726 and other international specifications. Type tests for impulse withstand and short circuit strength etc., have been conducted on representative ratings and voltage classes, at approved national test houses.