Shaft Earthing Device and Rudder Bonding Cable

A turning propeller and Rudder are electrically insulated from the hull by the lubricating oil film in the bearings and by the use of non-metallic bearing materials in the tail shaft and rudder carrier.
If the ship has a system of cathodic protection, whether it is sacrificial anode or an impressed cathodic current protection system, the shaft insulation will prevent the propeller and the boss from receiving protection. The electrical potential between the shaft and the hull can cause a heavy current to flow in bearings when the oil film breaks down or is contaminated with seawater.
This current can cause deep pitting of the bearing surface.
Rotating propeller generates a voltage potential difference between the shaft and the hull, which in time will cause damage to the propeller and the bearings due to arc erosion.
Arc erosion can occur due to lubrication oil break down (contamination with water and high metal contents). When the propeller is at rest, the stern tube, propeller shaft and main engine bearings are in contact with each other, maintaining continuity of the circuit.
#sed
#shaftearthing
#iccp
#bondingcable
#rudder
#shaftpropeller
#earthing
#arcerosion

[@yektinugroho7085]

Mantap bos

[@rickantonio188]

Nggeh Pak Guru..

[@mikesolo7993]

Great 3d models, however a 1 minute intro on a 15 minute video is a bit much. Keep up the great work!

[@rickantonio188]

Thank you for your sugestion and for your valuable feedback. I do hope that you enjoy my video and apreciate your fast response.
You can find more videos with 3D animation sort by its subject in my channel playlist.