Alstom Technology Limited

Claudio Picech

Ralf Rotzinger

Alfred Ziegler

Hermfred Gohn

The object of the invention is to provide improved protection for the insulation of the rotor end windings of electrical machines that is suitable in particular for electrical limit-rating machines. This is achieved by the rotor end bell ( ) consisting of steel and the retaining ring liner sheet ( ), spatially separating the end winding insulation ( ) from the rotor end bell ( ), consisting of titanium or a titanium alloy. Moreover, a lubricant ( ) with a temperature stability of >300&deg; C. is applied between the retaining ring liner sheet ( ) and the rotor end bell ( ).

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Moeriken, Switzerland

Claudio Picech