The company was originally incorporated 11th July 1994 as Triveni Electric Company Limited. Mr. Jitendra U. Mamtora, Mrs. Karuna J. Mamtora and Mr. Satyen J. Mamtora were promoted the company. In 1995, the Company name was subsequently changed to Transformers and Rectifiers (India) Limited. Currently, the company has having two manufacturing facilities situated at Changodar and Odhav situated in Ahmedabad. The company has executed a strategic acquisition of Odhav unit in 2006 as part of the expansion plans.

The company business mainly comprises of manufacturing and selling of various kinds of transformers such as power, and distribution transformers, furnace transformers, rectifier transformers, and specialised transformers. In 1998, the company has received as ISO 9001-2000 by Bureau Veritas, in respect of design manufacturing and servicing of distribution transformers, power transformers (up to 200 MVA, 220 kV class) and furnace transformers (up to 63 MVA, 33 kV class).

In year 2006, the company has increased the production capacity of the plant located at Changodar from 4000 MVA p.a to its present capacity of 6,000 MVA p.a. In order to effectively augment this unit's production capacities, the company has initiated several expansion and de-bottlenecking procedures to facilitate this expansion, including installation of new winding machines, separate oven for coil drying, segregation of despatch area along with 100 MT capacity EOT crane and employing additional manpower.