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Failed sensor caused ice shards

The failure of a sensor to halt a giant wind turbine when temperatures fall is blamed for shards of ice crashing into nearby homes in Cambridgeshire. The Cornwall Light and Power 80m (262ft) turbine was put up in August, near an industrial estate and close to homes in King's Dyke, Whittlesey. On 29 November chunks of ice started crashing into gardens.

The failure of a sensor to halt a giant wind turbine when temperatures fall is blamed for shards of ice crashing into nearby homes in Cambridgeshire.

The Cornwall Light and Power 80m (262ft) turbine was put up in August, near an industrial estate and close to homes in King's Dyke, Whittlesey.

On 29 November chunks of ice started crashing into gardens.

An investigation revealed a sensor had failed. Now the turbines will shut down if temperatures drop below 4ºC (38ºF).

Neil Harris, chief executive at Cornwall Light & Power, said: "We have conducted a thorough investigation into what happened and how to ensure the safe operation of the turbine during icy conditions.

"The sensor that we had been advised to rely upon in stopping the turbine under icy conditions did not perform as expected.

"We have proposed the turbine is automatically stopped if temperatures drop below 4ºC.

"New equipment will then be installed which will detect the formation of ice on the blades, and which will stop the turbine operating.

"We have gone into great detail with the turbine manufacturer and have kept the Health and Safety Executive informed throughout.

"We have also met with local residents... more [truncated due to possible copyright]  

The failure of a sensor to halt a giant wind turbine when temperatures fall is blamed for shards of ice crashing into nearby homes in Cambridgeshire.

The Cornwall Light and Power 80m (262ft) turbine was put up in August, near an industrial estate and close to homes in King's Dyke, Whittlesey.

On 29 November chunks of ice started crashing into gardens.

An investigation revealed a sensor had failed. Now the turbines will shut down if temperatures drop below 4ºC (38ºF).

Neil Harris, chief executive at Cornwall Light & Power, said: "We have conducted a thorough investigation into what happened and how to ensure the safe operation of the turbine during icy conditions.

"The sensor that we had been advised to rely upon in stopping the turbine under icy conditions did not perform as expected.

"We have proposed the turbine is automatically stopped if temperatures drop below 4ºC.

"New equipment will then be installed which will detect the formation of ice on the blades, and which will stop the turbine operating.

"We have gone into great detail with the turbine manufacturer and have kept the Health and Safety Executive informed throughout.

"We have also met with local residents and businesses to explain this and to advise that the turbine will be operational again."


Source: http://news.bbc.co.uk/2/hi/...

JAN 16 2009
http://www.windaction.org/posts/18620-failed-sensor-caused-ice-shards
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