AUTOMATIC VOLTAGE REGULATOR

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Sudden load current surges (eg. Due to motor starting) on a generator causes a corresponding change in its output voltage. This is due to an internal voltage drop in the generator winding and effect is called...

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...

EMERGENCY GENERATOR

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SOLAS Requirements Emergency generator and ESB should be located above the uppermost continuous deck, not forward of collision of bulkhead.MSB or any machinery space should not interface with the supply control and distribution of emergency...

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...

SHAFT EARTHING

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When steel is immersed in sea water (e.g. a ships hull) small galvanic current are initiated at anodic areas of the metal surface, causing corrosion. Such corrosion prevail at the stern of a ship, where...

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...

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...

LATEST SOLAS & MARPOL AMENDMENTS

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MARPOL 1) 1st  March 2018 – Data collection system for fuel oil consumption on ships. IMO documents : MARPOL Annnex 6, regulation 22, 5000GT & above. Entry in to force(EIF) under tacit acceptance procedure : 1st March...

MOTOR STARTING METHOD

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Star Delta Starter This is means of reducing starting current of induction motor by initially connecting to the stator winding to ‘STAR’. Once the motor comes up to speed (68%) to be connected in DELTA. When motor start in ‘STAR’ it has the effect of: Reducing...

SHORE ELECTRICAL SUPPLY

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A shore supply is required so that the ships generators and their prime movers can be shut down for major overhaul during a dry dock period. Requirements/Checks There must be a suitable connection box conveniently located...

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