MAIN SWITCH BOARD (MSB) SAFETIES
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
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
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...
REVERSE POWER RELAY
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
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...
MAIN SWITCH BOARD
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
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
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...