ELECTRICAL TROUBLESHOOTING
1. Alternator shows no voltage
Causes:
Exciter field resistance is too high or there is a
loss of residual magnetism.Short-circuit in excitation circuit probably between
leads to field or alternator slip rings.Insulation of windings is not proper.Fault in...
TROUBLESHOOTINGS FOR PURIFIERS
1. Fuel oil purifier feed pump breaker faulty
Causes:
Breaker is
tripping. It is not holding at ON position.
Remedial Actions:
Operate the system
with the standby pump. Isolate the faulty breaker & change with new one.
2. Fuel oil...
TROUBLESHOOTINGS FOR FRESH WATER GENERATOR & HYDROPHORE SYSTEMS
1.Fresh
water generator Ejector sea water pump over current trip
Causes:
Pump is drawing
high current & over current relay is tripping the breaker.
Remedial Actions:
Isolate the pump
and rotate the shaft by hand. Check for possible reason of...
AUXILIARY ENGINE RUNNING IN OPERATIONS
Running-In Operation
When the engine is started for the first time or immediately after replacement of the parts, such as the cylinder liners and piston, since the sliding parts of the engine are not yet...
TROUBLESHOOTINGS FOR MAIN AIR COMPRESSOR
1.Main air compressor breaker faulty
Causes:
Breaker is
tripping. It is not holding at ON position.
Remedial Actions:
Fill up the air
bottle with another air compressor. Isolate the faulty breaker & change
with new one.
2. Main air compressor outlet...
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...
BOILER MOUNTINGS
LIST OF BOILER MOUNTINGS
1) Main steam Stop Valve: The steam generated in the boiler is supplied to the main system through this valve. It is normally non-return type of valve.
2) Auxiliary steam Stop Valve: If there is...
BOILER CONSTRUCTION MATERIALS
Boiler
Casing:-
Mild steel plates (low carbon) C, Si, Mn, (Hot finished
rolled plates)
Steam
Drum:-
Mild steel plates (low carbon) TS-430-490MN/m2 C, Si, Mn (Hot finished)
Fire
Row & Gen. Row Tubes:-
Cold drawn seamless (low carbon steel) C, Si,...
BOILERS CLASSIFICATION
According to Passage of water and hot gases: • Water Tube Boiler: A boiler in which the water flows inside some small tubes which are surrounded by hot combustion gases. •...