Servo Stabilizers Manufacturer: Industrial Electrical Corporation
Logo Cast Resin Type Transformer
In view of the requirement of Indian Industry, we have already introduced IEC Cast Resin (Dry Type) Transformers. This introduction will supplement our existing products. Dry Type Transformers of both the varieties (Cast Resin type and Vacuum Impregnated Type) are in use in the Indian Industry. IEC manufacturers only Cast Resin Type Transformers as per the IS- IS 11171 / IEC 60726
Product Range
Ratings 25 KVA to 1,500 KVA. H.V. Voltages: 11, 22, 33KV. Voltages lower than 11KV on request
L.V. Voltages:
433 V and around. Insulation Class: F (90°C Tempe. Rise)
Applicable Standards:
IS 11171 / IEC 60726
Advantage of Cast Resin Transformers
arrow No Fire Hazard
arrow Near Load Center or even near to load
arrow Low Cable Losses as transformer is near to load.
arrow Negligible smoke generation
arrow Suitable for indoor use as no fire risk
arrow Can be installed outdoor in IP 45 enclosure.
arrow Suitable for as low as -25° C ambient temperature
Manufacturing Process
Manufacturing Core Process:
Three limb core constructions are used. Core sheets conforming to drawings are made from Cold Rolled Grain Oriented (CRGO) Silicon Steel sheets. Individual sheets come duly coated with inorganic insulation. Circular Core cross section is used which is obtained by assembling number of steps of different widths. Number of steps and step widths are optimized to gain maximum advantage. Mitred joints are used between the limb plates & yoke plates. Fiber -glass tape banding hold the core tight and reduce the noise level. Treatment given to the completed core protects it from atmospheric corrosion.
Winding And Protection
Both the H.V. and L.V. windings are made from copper conductors. Round wire, rectangular strip is used depending on current to be carried. Layer type or cross over type winding is used depending on current / voltage to be handled. On the H.V. side, inserts are provided to receive tap changing links. Inter connections between H.V. phases are obtained by links made out of copper tubes with their ends formed into lugs. These links are insulated by means of heat shrinkable tubes.
Protection against Overload/high winding temperature can be provided by Thermistors. ALAAM and TRIP are provided, when required, by means of Thermistors or RTD sensors can be provided with 2 set points.
Standard Accessories
arrow Rating & diagram plate
arrow Earthing terminal
arrow Skid under base or truck with bidirectional wheels
arrow Primary Terminal
arrow Secondary terminal lifting lugs
arrow Enclosure with IP 21,23 or other protection class
arrow Temperature monitoring unit with display
Optional Accessories
arrow Over current relay
arrow Forced ventilation system
All routine tests list below are carried out at our factory during final testing according to standard IEC 726/ IS 2026 / IS 11171.
arrow Check Rating
arrow Insulation Resistance Test
arrow Winding Resistance Test
arrow Turns Ratio Test
arrow No load Current Test
arrow No load losses Test
arrow Full load losses Measurement Test arrow Impedance Voltage of Transformer
arrow High Voltage Test arrow Temperature Rise Test
arrow Induced Voltage Test arrow Insulation level & Dielectric Test
arrow Polarity Phase Relationship Test arrow Impulse Test
arrow Break down value test of Transformer Oil arrow Short Circuit withstand Test
Upon request the following type test can be carried out on customer's request
arrow Temperature rise test
arrow Full wave impulse test
Technical Data
Standard Applicable IS 2026, IS-11171, IEC 726
Type Open / Enclosed
Temperature Class 155/140/120 °C
Insulation class H / F /B
Contact Us
Industrial Electrical Corporation 602, Phase - IV, GIDC Vatva, Ahmedabad, Gujarat - India. Pin/Zip Code : 382 445.
Phone: 091 - 79 - 25831047
Fax: 091 - 79 - 25834379
E-Mail: mn_ppk@bsnl.in info@servostabilizers.com