In exercise of power conferred under Section 131(4) of the Electricity Act 2003, the Govt. of West Bengal unbundled West Bengal state Electricity Board into two Companies viz. West Bengal State Electricity Distribution Company Limited (WBSEDCL) and West Bengal State Electricity Transmission Company Limited (WBSETCL). Under the West Bengal Power Sector Reforms Transfer Scheme 2007, activities relating to Transmission and Load Dispatch business of WBSEB were transferred to West Bengal State Electricity Transmission Company Limited (WBSETCL). In effect of the Power Sector Reforms Transfer Scheme 2007, West Bengal State Electricity Transmission Company Limited was incorporated under the provisions of the Companies Act 1956 on 16.02.2007 and other obtained Certificate of Commencement of business on 21st March, 2007.

WBSETCL wholly owned by Govt. of West Bengal, is a professionally managed, a multi-sited Power Transmission Company in Eastern India. The Company has developed strong in-house expertise in various facets of power transmission business. As on the end of financial year 2018-19, the Company operates and maintains a transmission network of 14060 CKM of Extra High Voltage Transmission lines along with 137 sub-stations (400 KV- 66 KV) having total transformation capacity of 33801 MVA, spread over the entire stretch of the State of West Bengal. With focus of improving performance, the transmission system was consistently maintained at an availability of 99.92% for the year 2018-2019, at par with international standards.

Ministry of Power, Govt. of India, adjudged the Company for Best Transmission System Availability Award with Gold Shield for the year 2007-08 in appreciation of the fact that availability of transmission system remained more than 99.87%.In the year 2012, WBSETCL won the Powerline Award in the category of Best performing Transmission Company. Again in the year 2013, WBSETCL was adjudged with the IPPAI Award for best performing State Load Dispatch Centre (Eastern Region) by the Independent Power Producers Association of India. In 2018, WBSETCL bagged the prestigious IPPAI award as "Runner up" in the category of "Best State Transmission Company". Recently in 2019, WBSETCL won the IPPAI award as Winner in the category of "Best State Transmission Utility-Public Sector" for Commendable service in maintaining Transmission System Availability of 99.92% and Transmission Losses only 2.49%. Gross earning for the year 2018-19 is 1353.05 Crore with net profit of 448.30 Crore