Tamil Nadu Transmission Corporation Limited (TANTRANSCO)

Native name	தமிழ்நாடு மின் தொடரமைப்புக் கழகம் (வரையறுக்கப்பட்டது)
Company type	Government-owned corporation
Industry	Electric utility
Predecessor	Tamil Nadu Electricity Board Electricity Transmission Wing
Founded	October 1, 2010 (2010-10-01)
Headquarters	Chennai, Tamil Nadu , India
Area served	Tamil Nadu, India
Key people	Vikram Kapur I.A.S (Chairman) S.Shanmugam (MD)
Services	Electric power transmission
Revenue	₹2,781.84 crore (US$350 million) (2018) [1]
Operating income	₹2,112.70 crore (US$260 million) (2018)[1]
Net income	₹−4,666.14 crore (US$−580 million) (2018)[1]
Total assets	₹43,591.85 crore (US$5.5 billion) (2018)[2]
Total equity	₹22,206.70 crore (US$2.8 billion) (2018)[2]
Parent	TNEB Limited
Website	www.tantransco.gov.in

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.

Substations

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:

• 400/230 kV substations.
• 230/110 kV substations.
• 110 kV substations.
• 33 kV substations.

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.