TransAlta to return power plants to service

TransAlta Corp. said the forced outage at its Keephills 1 power plant will last longer than anticipated so the company can complete a full rewind of the generator.

For Sundance 1, TransAlta reported an earlier return-to-service date of July 31, 2013.

Keephills 1 tripped offline on March 5, 2013. After extensive testing involving the original equipment manufacturer, the cause of the fault was determined to be a winding failure within the power generator. Two phases of repair work were safely completed in an attempt to return the power plant to service.

However, upon completion of the repair work, further condition testing and analysis by TransAlta, the original equipment manufacturer and industry experts has identified greater winding degradation requiring a full rewind of the generator. As a result, the power plant is anticipated to return-to-service by mid-November, 2013.

TransAlta has given notice under the power purchase arrangement to the PPA buyer and the balancing pool of a high impact low probability force majeure event. In the event of a force majeure, TransAlta is entitled to continue to receive its PPA capacity payment and is protected under the terms of the PPA from having to pay availability penalties. As a result, TransAlta does not expect the outage to have a material financial impact on the corporation

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