The cooling system runs on the following standard layout: The central freshwater cooling system with single-stage scavenges aircooler and a separate HT circuit. As freshwater is t... Read more
Electronic equipment such as programmable logic controllers (PLCs), timing relays and coupling modules that can be affected by other components on ship electric network, are common... Read more
Electromechanical relays can be expensive, large, take longer to work than modern semiconductors and have a finite contact life, particularly for large power contactor relays on bi... Read more
Overload relays protect motors from overheating, eg by machinery being overloaded or an open phase In a three-phase system.The relay will open and disconnect from the power source... Read more
It is very important that electrical devices in a circuit are connected accurately by using cables with the correct voltage and polarity. To ensure cables are connected correctly t... Read more
Ship electrical diagrams are schematic illustrations used to represent any ship electrical system ranging from single line power distribution systems to ship main power and auxilia... 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
There are three types of overcurrent relay (OCR) used for motor protection: Electronic Thermal Electromagnetic Electronic OCIT (overcurrent inverse time) relays have largely supers... 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
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 connecte... Read more
