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Transformers

Sudhir Powering the Nation

Sudhir is a renowned name in India’s power generation industry, known for delivering comprehensive turnkey electrical solutions from generation and distribution to electrification. With its headquarters in Gurugram, the company specializes in setting up diesel-based captive power plants up to 40 MW. Sudhir serves a diverse blue-chip clientele through multiple manufacturing facilities across India, focusing on diesel and gas generators, HT and LT switchboards, transformers, packaged substations, and turnkey EPC (Engineering, Procurement, and Construction) contracts.

Their product range includes an extensive lineup of diesel gensets from 7.5 to 3000 KVA, gas-powered options, a full range of HT (11KV & 33KV) panels, LT switchboards, oil and dry-type transformers, and packaged substations. Sudhir’s turnkey EPC services cover both electrical and mechanical aspects of power generation, distribution, and electrification. With five cutting-edge manufacturing plants located in Silvassa, Jammu, and Manesar, the company proudly serves over 100,000 customers.

Transformers – At a Glance

Offers a complete range of power and distribution transformers designed to grant the reliability, durability, and efficiency required in utility, industrial, and commercial applications.

1

First company to manufacture Dry Type Transformers (Mould-less Resin Encapsulated) in India.
2

Proven expertise in design for special duty & Multi Winding Transformers for applications like variable speed drives, furnace duty & converter duty.
3

Designs tested at CPRI as per IS 2026, IS 1180, IS11171 IEC60076-11 & ECBC
4

ISO 9001:2008 accredited by DNV.GL
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Proven high product reliability.
6

Approved with all leading consultants & major supplies to steel plants & thermal power plants.

Product Range

Dry Type Cast Resin upto 5 MVA, 33KV class
Oil Type upto 20 MVA, 33 KV class
Dry Type VPlupto 5 MVA, 11 & 22 KV class
Multi Tap Transformers
Drive Transformers – Converter duty – upto 36 pulse 18 secondary’s
Corrugated tank hermetically sealed Transformers
Solar Transformers Inverter duty upto 15MVA, 33 KV,2,3 or 4 windings.

Oil Type Transformers

Our oil type transformer offers perfect solution for any application. High efficiency & low cost transformer form part of our wide range. Our transformer are certified by Bureau of Energy Efficiency.

Voltage regulation is provided with winding tapings as per customers’ 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.

Every transformer undergoes a series of tests throughout the manufacturing process, right from raw material stage. All routine tests are carried out at our works as per IS 1180, IEC 60076-11 and other international specifications. Type tests for impulse withstand and short circuit strength etc., have been conducted on representative ranging and voltage national test houses.

Dry Type Transformer

  • Cast Resin Transformer
  • Vacuum Pressure Impregnation(VPI)

A full range of dry-type transformers with primary voltages through 72.5 kV built according to all major standards including IS, IEC and ANSI. are offered to minimize environmental contamination and fire hazard.

These transformers meet strict parameters with respect to electrical system demands and functioning in areas with extreme climate condions.

The dry-type transformers are moisture-proof, suitable for operation in humid or heavily polluted environment. They are the ideal for operation in environment with humidity higher than 95 % as well as at temperatures down to -25 °C. There is less space and less civil work needed, no special safety features are required (fire detecon). They are maintenance free and extended life is due to low thermal and di-electric ageing Looking at these advantages customers are specifying dry-type transformers more frequently

Advantages Of Dry Transformers

  • These state of art Transformers provide the best solutions in the most demanding applications.
  • Insulation offered is class F (115) class H (145) & class C (2000)
  • Minimum partial discharge
  • High mechanical & short circuit strength
  • Resistant to dust and humidity
  • Safe equipment which can be placed closed to the load
  • Flexibility invariable load situations
  • Reduced size & weight or better space utilization
  • Maintenance free under normal conditions
  • Comply to IEC 60076-11 & 11171-1985
  • Comply to latest ECBC norms.

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