The fund, jointly promoted by ICICI Bank, Bank of Baroda, Life Insurance Corporation (LIC) and Citicorp Finance (India), awarded its first sanction letter to a road project.
Economic Affairs Secretary Arvind Mayaram said a high ratings would make infrastructure debt funds competitive in the refinancing market.
The first sanction letter was given to a project by Jaiprakash group for refinancing of NHAI-bid road-project of Zirakpur-Parwanoo section of NH-22 built by Himalayan Expressway Limited.
Mayaram said debt funds would play an important role in financing of infrastructure projects in the country.
India targets to invest nearly $1 trillion in infrastructure between 2012-17. Half of this money is expected to come from private sector.
"We require about $1 trillion for infrastructure sector, out of which $500 billion have to come from private sector. Therefore, we have to provide multiple instruments to the private sector to raise funds," Mayaram said at a function organised at the finance ministry in North Block.
Managing director and chief executive of ICICI Bank Chanda Kochhar said the "rating would enable Infradebt to access long-term funds for Indian infrastructure sector at low interest rates from domestic markets as well as pension and insurance funds."