July 25 (Reuters) - TransAlta Corp said it estimates a loss in the second-quarter compared with a year earlier due to higher maintenance costs, losses in energy trading and lower electricity prices.
The company, which will report second-quarter results on July 31, estimated net loss of between C$18 million and C$28 million, or 8 Canadian cents and 12 Canadian cents per share.
Analysts are expecting earnings of 18 Canadian cents per share, according to Thomson Reuters I/B/E/S.
Power producer TransAlta also said its unit entered into a 11-year agreement to provide electricity to Puget Sound Energy. (Reporting by Ankur Banerjee in Bangalore; Editing by Akshay Lodaya)