All ship electrical machines have two sets of coils: one set (field coil in generator and motor, and primary coil in transformer) produces the working magnetic flux φ and the other... Read more
Remote control system showed “Abnormal Alarm” on the rpm pickup sensor, first time, the normal operation of the main engine was restored by a resetting operation. Main engine fail... Read more
All electrical circuits on ships are required to be identified in applicable documents and on equipment labels, such as nameplates and cable tags, with a designation prefix.Some se... Read more
During navigation in rough seas, the main engine tripped as a result of the actuation of themain engine overspeed trip induced by racing. After resetting it, crew members made atte... Read more
The first and foremost task for shipboard power system design is to compile a table of all connected ship electrical loads along with their load factors in all operating modes of t... Read more
It is not likely that there will be a dramatic shift in technology in electric power distribution for AC systems. A gradually introduction of new protection relays, programmable an... Read more
If one phase is short-circuited to ground, there will flow a ground fault current. Its magnitude depends heavily onthe method of system grounding, which are: UngroundedGround fault... Read more
Short circuit calculations are done to ensure that fault current in short circuits does not exceed breaker’s and other equipment’s maximum ratings. Under short circuit, the mechani... Read more
Staff on an up-bound tanker in a river waterway decided to anchor the vessel just below the lock to wait for traffic ahead to clear. While it was anchoring the vessel lost propulsi... Read more
One of our vessels recently called at a high-latitude port in severe winter conditions. In preparation for loading cargo with a shore loader, all the ship’s crane jibs were r... Read more
