Transformers

Through continuous research and development, UJAASTM has successfully extended its product range to manufacture transformers upto 25,000 KVA at 132 KV class and includes special duty transformers as follows:

The transformers are manufactured in conformance to Indian Standards Specification IS:2026 and IS:1180, International Specification IEC:76 and / or equivalent. However transformers can be supplied conforming to any other standard if / as specifically required by the customer. We regularly manufacture ratings prevalent in India. However, any other rating can also be supplied on request.

UJAASTM is equipped to meet the special requirements of both domestic and foreign markets. Transformers can be designed and manufactured according to our standard specification or customer’s specifications in terms of rating, no load loss, impedance, flux density of core, current density, overall tank dimension or any other technical parameters.

Convertor And Special Purpose Transformers


Converter duty transformers are used as set up transformer from generator to line voltage. Converter duty transformers have range up to 10 MVA with the voltage capacity of up to 33 KV. Converter transformers and heavy duty transformers are very durable and hassle free to be used by desired clients. It comes with an automatic on/off cooling option. We offer these converter duty transformers and heavy duty transformers at a competitive price.

One of the main differences from other types of converter transformers is that the load currents contain higher harmonics due to the distorted waveform. The converter duty transformer causes the distorted current waveform. This current leads to higher losses in temperatures in the transformer. Network regulations also require reduction of harmonic distortion.

The most common use for converter transformers are found in applications such as:

Variable speed drives (VSD)

Aluminium electrolysis

DC arc furnace

Graphitizing furnaces

Traction substations

Copper refining

Power Transformers


We offer power transformer which is known for accepting energy at one voltage and passing it to other voltage. We made power transformer using premium quality materials which are rugged and reliable. The high quality standards adapted by M & B Transformers are appreciated throughout the country. Power transformers upto 25 MVA and 132 KV class are regularly manufactured and supplied to the domestic/international markets as per various standards.

One of the main differences from other types of converter transformers is that the load currents contain higher harmonics due to the distorted waveform. The converter duty transformer causes the distorted current waveform. This current leads to higher losses in temperatures in the transformer. Network regulations also require reduction of harmonic distortion.

Our power transformer finds extensive application in following areas :

Steel & Power Segment

Commercial and industrial power distribution system

Oil and dry-type units

Utility applications

Distribution Transformers


We specialize in manufacturing distribution transformers from 10KVA to 5000KVA capacity with primary voltage of 11KV, 22KV and 33KV and secondary voltage as per customer’s specifications.

The R&D and the design team always bring the best design for various capacities of transformers making sure it functions with high efficiency and low energy loss. With the advanced infrastructure and exceptionally qualified engineers, we have a capacity to manufacture more than 300 transformers a month.

Arc Furnace,Induction Furnace Transformers


We offer furnace transformers and arc furnace transformers for arc furnace/ submerged arc furnace/ induction furnace applications with capacity of 25MVA and primary voltage up to 33 KV class. The secondary voltages of these transformers suit furnace specifications with 6, 12 & 24 pulse operations.

Our power transformer finds extensive application in following areas :

“Off Circuit Manually Operated” and “On Load Tap Changer” (OLTC) with AVR and RTCC panel

OFWF cooling with ONAN cooling optional

ONAN cooling with conventional pressed steel radiators

Requisite series reactors for arc furnace transformers to reduce the short circuit stresses generated in transformer during the furnace operation

Designed to withstand the harmonics generated due to furnace operation