The unit has been commissioned at Mouda Super Thermal Power Station (STPS) at Mouda in Nagpur district of Maharashtra, BHEL said in a statement.
The order for setting up two coal-based thermal units of 660 mw was placed by NTPC Ltd.
While the first unit has been commissioned, work on the other 660 mw unit is also in an advanced stage. Notably, BHEL has earlier set up two units of 500 mw each at Mouda STPS, which are in operation.
In the supercritical segment, BHEL has demonstrated its technological capability in the manufacture and execution of 660 mw, 700 mw and 800 mw sets.