AMES Impex Electricals Pvt. Ltd.

Dry Type Transformers

Technical Features :

Manufacturing Standards

The transformers are built in accordance with IS 2026/IS 11171 and IEC 726 standards


The core is built of cold rolled oriented grain steel with low specific losses, insulated on both sides by a thin inorganic coating (Carlyte). The sheets composing the core are cut at 45 degrees C. Uniform pressing, stiffness and solidity of the columns assure a low noise level.

High Voltage Windings

The high voltage windings are realized by disc/ Comb winding, depending on the feeding voltage and transformer power. The copper conductor is NOMEX/FIREGLASS insulated or class H enamel. Adequate axial channels between the layers of windings grant a uniform cooling. Insulation between high and low voltage and core is made by fibreglass cylinders. All the winding are dried in an oven and impregnated under vacuum by using class F/H insulating Varnishes/ Resin.

Low Voltage Windings

The low voltage windings are made of copper Strip/Foil (Above 1000 KVA). This modern technology assures an excellent resistance to electrodynamic stresses, much higher than the one obtained with traditional elix windings. The insulation between windings is obtained by using class F/H material.

Standard Accessories
Optional Accessories
Technical Datasheet
Terminal Arrangement
  • Rating and diagram plate
  • Earthing terminal
  • Skid under base
  • Bidirectional wheels
    • Primary Terminal
    • Secondary terminal
    • Lifting lugs
    • Enclosure with IP 21, 23 or other protection class
    • Temperature monitoring unit with display
  • Over current relay
  • Forced ventilation system
  • Surge Arresstor
  • On Load Tap Changer with RTCC and AVR
  • Jacking Screw
  • Anti-Vibration Pad
  • Over current relay
  • Forced ventilation system


All transformers are individually tested with routine test, according to standard IS 2026/ 11171 and IEC 726. Upon request the following type test can be carried out.

  • Temperature Rise Test
  • Full Wave Impulse Test
  • Short Circuit Test
Standard Applicable : IS 2026, IS 11171, IEC 726
TYPE : Open / Enclosed
Temperature Class : 155/140/120 °C
Insulation class : H / F /B
Protection Class IP-21/23/33/44
Installation Indoor / Outdoor
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    500 KVA, 11/0.433 KV
    Dry Type Transformer
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    Dry Type Transformer
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    1250 KVA, 11/0.433 KV
    Dry Type Nomex Cover H Class Transformer
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    315 KVA
    Resin Impregnated Transformer
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    750KVA Nomex Insulated
    Dry Type Transformer
Designed By Cipher