The Tata Power Company Limited (BSE:500400) has restarted fund-raising efforts for its renewables business, six months after pulling out of negotiations with Petronas for a potential $2 billion investment. It's now looking to raise INR 40 billion - INR 55 billion ($500-750 million) for Tata Power Renewables Energy Limited (TPREL), the subsidiary of listed Tata Power, said people aware of the development.