The high efficiency propellershaft earthing system "PES" can prevent the micro pitting marks at the propeller, on the sliding surfaces of crankshaft journals and main bearings of the engines to be assumed as spark erosion. The system serves for a short circuit between the rotating propeller shaft and ship´s hull. The propeller shaft earthing system "PES" (split slipring of copper lined with a silver track and contact brushes) ensures an excellent potential decomposition and the contact brushes ensure lubrication and long life.Standardized parts and a high prefabrication grade ensure an easy installation onboard by the technical crew without special tools. For effective operation it is recommended to install:
- a remote indicator in order to achieve a continuous control of the effectiveness of the whole system
- an automatic slipring cleaning device to prevent an increase of the residual potential during operation.
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