MAIN SWITCH BOARD (MSB) SAFETIES

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MSB to be installed on the raised platform. The location where the MSB is installed should have good ventilation, illumination & affected by minimum vibration. No water or the oil pipes should pass above the MSB. There...

MEGGER OR MEGOHMMETER

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Megger is the most portable insulation tester. It is used to measure very high resistance of the order of Mega ohm. Types of Megger This can be separated into mainly two categories:- Electronic Type (Battery Operated) 2. Manual Type (Hand...

BRUSHLESS ALTERNATOR

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In this machine slip-rings and brushes are eliminated and excitation is provided not by conventional direct current exciter but by a small alternator. The a.c. exciter has the unusual arrangement of 3phase output windings on the rotor and magnetic...

CAPACITOR

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A capacitor is a two terminal electrical component used to store electrical energy temporarily in an electric field. The types of practical capacitors vary widely, but all contain at least two electrical conductors (plates)...

REVERSE POWER RELAY

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Alternators used for parallel running are required to have a protective device which will release the breaker and prevent motoring if reversal of powering occurs. Such type of device would prevent damage to prime...

RUDDER ANGLE INDICATOR

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It is a device which is used to indicate the current position of the rudder blade, normally fitted in the wheelhouse, bridge wings and engine control room. A rudder angle indicator consists of a feedback...

DRY DOCK

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All ships should under go drydock twice in 5 years, and time difference between two continues drydock cannot be more than 36 months.This comprise maintenance of the hull, propeller, rudder and other parts which...

MAIN SWITCH BOARD

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Survey of MSB Proper cleaning to be carried internally as well as externally normally carried out when board is completely dead (all generator stopped and prime mover locked off). Inspect for dirt and dust (electro clean and vacuum...

SHAFT DRIVEN GENERATOR ARRANGEMENT

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The a.c. shaft generator is a synchronous machine which produces alternating current with a frequency that is dictated by variations in engine speed. At the full rated r.p.m., frequency may match with the electrical...

MARINE DIESEL ENGINES NOTATIONS

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There has been too much puzzle with regards to the notations used for the Marine Diesel Engines. One can consult the engine manual & find out what such notations means. However, this article will provide explanation for...

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