Any ship electrical drawing representing an ship electrical installation or ship circuit uses specific symbols to represent the various ship electrical devices in shorthand. This p... Read more
What are some general safety tips for working with or near electricity? Inspect portable cord-and-plug connected equipment, extension cords, power bars, and electrical fittings for... Read more
The main advantages low-impedance ship’s grounded systems are: No special attention for equipment insulation required – Automatic detection and immediate isolation of ground... Read more
The main advantages of Insulated neutral ship’s system are: – Continuity of service on a ground fault – Ground fault currents can be kept low The main disadvant... Read more
Naturally, all lamps are designed to produce their rated luminous output at their rated voltage. An overvoltage on an incandescent lamp produces a brighter and whiter light because... Read more
ships, voltages upto and equal to 1000 volts is called as low voltage system and voltages above 1000 volts is called high voltage system. Normally low voltage system is common on b... 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
The induction motor has two main components, the stator and the rotor. The stator carries three separate insulated phase windings which are spaced 120 degree (electrical) apart and... Read more
LV generator circuit-breakers and other large distribution circuit-breakers (600-6000 A) on board ship are traditionally of the air break type called ACB (air circuit breaker). Thi... Read more
