Dry-type transformers are a part of most electrical installations. They range in size from small doorbell transformers to three-phase 25-kVA units installed in electrical closets to large, free standing units rated at several hundred kVA. Electro tehnical Officers on ship must know how to test for and diagnose problems that develop in transformers especially in […] Read more
Responsibilities of IT Tehnician on Cruise ship: Maintain inventory of all software and computer, printer, and network hardware with serial numbers and record of ownership Assist shoreside IT with application deployment, upgrades, and troubleshooting User assistance: Assist users when required in all computer based applications Instruct users in basic handling routines, such as login, logout, […] Read more
Coils are used in a variety of electromagnetic starters, relays and contactors. Letters are used to Identify the coil. For example, -KM would indicate a motor starter while -K indicates both a control relay and contactor. Read more
Manned engine-rooms are rare nowadays. Modern automation systems such as remote control and alarm and monitoring systems make it possible to operate most engine-rooms unmanned, at least part of the time. In day-time engineers can execute planned maintenance and repairs or replacement of defective parts. Because engine-rooms are usually warm, damp and noisy, an un-manned […] Read more
An ETO (Electro Technical Officer) is part of the engineering department on a ship or yacht, employed to look after all electrical and electronic equi... Read more
Like the old chaps Pascal, Bramah, Reynold and other physicists found and defined natural laws and principles ruling for hydraulics, also electronics... Read more
Sometimes a few turns in the secondary winding of a transformer experience a partial short, which in turn causes a voltage drop across the secondary.... Read more
Ideally insulation resistance measurement on ship electrical machine is while the machine is hot? Insulation becomes more leaky (its IR value falls) a... Read more
We are currently seeking Electricians for current Port Project which currently is around 3 months of... Read more
All equipment is subject to wear and tear and will eventually reach the end of its useful life and need to be replaced. As equipment nears the end of its safe working life, its condition can deteriorate to a dangerous extent.The purpose of maintenance, therefore, is to extend the useful life by repair and/or replacement […] Read more
Passenger vessels, cruise ships, and ferries have very high requirement for on-board comfort regarding noise and vibration. In addition, the reliability and availability is very critical for the safety of the passengers and the vessel. Consequentially, electric propulsion was early evaluated to be beneficial and taken into use. The list of cruise vessels with electric […] Read more
A ship shore-supply is required so that the ship’s generators and their prime-movers can be shut down for major overhaul during a dry-docking period. There must be a suitable connection box conveniently located to accept the shore supply cable. The connection box is often located at the entrance to the accommodation or in the emergency […] Read more
When motor direct-on-line started with the stator winding star connected, it will only take one-third of the starting current that it would take if the windings were delta connected. The starting current of a motor which is designed to run delta connected can be reduced by star-delta starters for small motors may be operated by […] Read more
The direct on line ship motor will rotate with a speed directly determined by the ship network frequency. For propulsion, thrusters, pumps, winches, etc., there might be significant savings in ship power or fuel consumption of ship generators by reducing the no-load dependent losses in operations. Also, controllability of the driven load will be greatly […] Read more
Azimuth thrusters are thrusters that can be rotated in order to produce thrust in any direction. The thrust is controlled either by constant speed and CPP design, variable speed FPP design, or in rare cases with a combination of speed and pitch control. Variable -speed FPP designs has a significantly simpler mechanical underwater construction with […] Read more
Power currents (a. c.) can be measured simply by means of a clamp meter which acts as a current transformer. The instrument tongs are clipped round a single insulated conductor – the circuit is not interrupted. The value of current is obtained from the magnetic flux strength around the conductor and is usually displayed on […] Read more
To successfully carry out the various test procedures suggested in this manual, certain test instruments are essential. The following lists detail the basic requirements in this respect. It should be noted that in addition to these instruments a comprehensive kit of tools is also essential. For fault finding purposes this need not include any specialised […] Read more
Most multimeters can only measure current up to 10 A maximum. The current measuring facility is intended only for small current components and, in particular, for electronic circuits. The instrument will almost certainly be damaged if it is used to measure the current to motors and other power circuits. The basic current range can be […] Read more
Diesel electric propulsion and station keeping facilities are also used in vessels for operations in more shallow waters, such as dredgers and construction vessels, wind mill installation vessels, etc. Maneuvering and fuel economy with Diesel Electric Propulsion on Dredgers Accurate maneuverability with improved fuel economy, in combination with a need to move working place frequently […] Read more
The podded propulsion system is the largest step forward as propulsion unit in the recent years. The concept is not yet fully developed for all market and power applications, and there will be a continuous development to be seen.This may have significant impact on vessel design and allow for total new ship concepts for many […] Read more