The Crucea North project, located in the Constanta county in eastern Romania, will feature 36 V112-3MW turbines.
Delivery of the machines is planned to start in April 2014 and commissioning is expected to be completed by December 2014.
The order includes supply, installation and commissioning of the turbines, along with a ten-year service agreement.
The wind farm is being developed by Crucea Wind Farm SRL, whose main shareholders are Steag and Romanian developer Monsson Alma.
Romania has an ambitious National Renewable Energy Action Plan and is expected to have an installed wind capacity of 2.8GW by the end of the year.
However, there have been recent concerns over the country's policy as the government eyes new cuts to the country's renewable energy incentive programme.
Earlier this year it was estimated that more than 900MW of new wind capacity could come online this year, bringing the country's total capacity to more than 2.8GW. But this forecast has steadily fallen throughout the year.