Ever since AC generation and distribution has been introduced on a large scale on ships around 1950, there has been debate about the type of distribution system. The main focus wit... Read more
Look at the stator windings for damaged insulation caused by careless replacement of the rotor into the stator. Discoloured insulation is an indication that the winding has been ov... Read more
The standard cage-rotor a.c. induction motor operates as an almost constant speed drive over its load range. This feature is satisfactory for most of the ship’s auxiliary ser... Read more
Generally, fault finding on ship is not an easy task. It is essential to have a good under-standing of the operation of the particular equipment and general insight into some of th... Read more
The fuse is a piece of wire which can carry a stated current; if the current rises above this value it will melt. If the fuse melts (blows) then there is an open circuit and no cur... Read more
A bulk carrier was on a ballast passage and conducting ballast exchange operations when a large gate valve in the engine room on the ballast/bilge system failed, causing severe flo... Read more
A vessel at a repair berth was on shore power. The heavy electrical cable was led parallel to the shore gangway that was hooked on to the ship’s side bulwark on the main deck... Read more
Repetitive alarms occurred when crew performed steering tests to move the rudder through its range of motion. The alarms indicated a ‘hydraulic lock’ event, even though the steerin... Read more
