Feb 5 (Reuters) - The Indian government expects to raise around 120 billion rupees ($2.25 billion) by selling a 9.5 percent stake in state power utility NTPC Ltd in a share auction on Feb. 7, Disinvestment Secretary Ravi Mathur said.
The floor price for the offer will be announced on Wednesday, he said.
Share sales in state companies has been a key element of the government's plan to bring down its fiscal deficit to 5.3 percent of gross domestic product by March-end to avoid a credit downgrade from global ratings agencies.
The government aims to raise $5.6 billion by selling shares in the 2012/13 fiscal year to March. Last week, it raised $585 million through a 10 percent stake sale in state explorer Oil India Ltd.
It expects to sell shares in four other state companies before March-end, Mathur told reporters.
($1 = 53.26 rupees) (Reporting by Prashant Mehra in MUMBAI; Editing by Anupama Dwivedi)