22 Dec '15, 2pm

Power transformers for ultra high voltages can be insulated with biodegradable natural oils:

The ester fluid transformers supplied by the Siemens factory in Linz, Austria and with a rated capacity of 125 MVA (10 units designed for 345 kV and 4 units for 230 kV) will connect the Glen Canyon power plant to the transmission grid and increase the transmission power capacity to provide stable, reliable electricity to customers. This project is the first time the Bureau of Reclamation will use ester fluid transformers of this size for a hydroelectric power plant. The synthetically produced ester fluid offers significant environmental benefits compared to the petroleum-based mineral oil counterparts typically used in power generator step-up (GSU) transformers. The ester fluid is fully biodegradable, operates at a much higher flash point which results in a lower fire risk and can dissipate in water quickly if necessary. "Yellowstone Electric is very proud to have been sel...

Full article: http://www.siemens.com/press/en/pressrelease/2015/energym...

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