The general term “overcurrent” applies to a relatively small increase over the full load current (FLC) rating (e.g. due to mechanical overloading of a motor) rather tha... Read more
Many forms of electrical protection on ship are available which are designed to protect the distribution system when a fault occurs. Protection relays are used to monitor overcurre... 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... Read more
If a single earth fault occurs on the live line of an earthed ship distribution system it would be equivalent to a short-circuit fault across the generator through the ship’s... 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
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... Read more
Electronic diodes, and other semi-conductor devices with p-n junctions (e.g. the base-emitter of a transistor) can be tested using a digital type instrument using the following pro... Read more
Anyone who has access to live electrical equipment must be fully aware of first-aid and safety procedures related to electric shock as described in relevant safety acts. Copies of... Read more
Ship’s large power equipment and processes utilise high forces. Electrical, mechanical, thermal and chemical changes produce the desired operation. Very high values of ship voltage... Read more
There are various types of diagram which attempt to show how an electrical Circuit operates on ship. Symbols are used to represent the various items of equipment. The shipbuilder p... Read more
