 Amer of the Engineering Consulting Centre at Ain Shams University reports on some investigations made for a petroleum company on a 5,400 kW motor, without a clear reason for the failure.In their article they reported that Siemens was called in as a consultant and their solution was to fit R-C suppression /surge arresters similar to that used in other motor starter failures at a Venezuela pumping station.An article in the Wärtsilä technical journal 01.2009, reports that the four 2,900 kW thrusters motor autotransformers starters on Q4000 a multipurpose oil drill vessel suffered repeated autotransformer failures prior to 2008.