| Tamil Nadu Transmission Corporation Limited (TANTRANSCO) | |
| Native Name: | தமிழ்நாடு மின் தொடரமைப்புக் கழகம் (வரையறுக்கப்பட்டது) |
| Type: | Government-owned corporation |
| Predecessor: | Tamil Nadu Electricity Board Electricity Transmission Wing |
| Location City: | Chennai, Tamil Nadu |
| Location Country: | India |
| Area Served: | Tamil Nadu, India |
| Key People: | Vikram Kapur I.A.S S.Shanmugam |
| Industry: | Electric utility |
| Services: | Electric power transmission |
| Revenue: | (2018) [1] |
| Operating Income: | (2018) |
| Profit: | (2018) |
| Assets: | (2018)[2] |
| Equity: | (2018) |
| Parent: | TNEB Limited |
The Tamil Nadu Transmission Corporation Limited (TANTRANSCO) (Tamil: தமிழ்நாடு மின் தொடரமைப்புக் கழகம் (வரையறுக்கப்பட்டது)) is an electric power transmission system operator owned by Government of Tamil Nadu. It was established in November 2010, as a result of restructuring the Tamil Nadu Electricity Board. It is a subsidiary of TNEB Limited.
The TANTRANSCO maintains all the substations in Tamil Nadu apart from the Power Grid Corporation of India Limited (PGCIL). These substations fall under one of the following categories:
less than this kV transmissions as 22 kV and 11 kV are used for distribution.
66/11 kV substations were in use earlier. This is no longer the case anymore.