MAIN ENGINE&AUXILIARY ENGINESHUTDOWNSSLOWDOWNS TRIPSINTERLOCKS

MAIN ENGINE SAFETY SYSTEMTHE ME SAFETY SYSTEM IS DESIGNED FOR PROTECTING THE DIESEL ENGINE AGAINST BREAKDOWN UNDER CONDITIONS DIFFERENT FROM THOSE OF NORMAL OPERATION.

THE SYSTEM CONSIST OF TWO INDEPENDENT SUB SYSTEMS :

SLOWDOWN SYSTEM - PROVIDES LOAD SHEDDING FOR A TWO-STROKE REVERSIBLE ENGINE WITH OUTPUT TO A FIXED PITCH PROPELLER,BY REDUCING ENGINE RPM.STUTDOWN SYSTEM - STOPS THE ENGINE BY CUTTING-OFF THE FUEL SUPPLY.IT OPERATES AFTER A TIME DELAY OF 10 SECS.

AFTER ACTUATION OF THE SYSTEM THE SAFETY RESET BUTTON MUST BE PRESSED TO UNLOCK.

MAIN ENGINE SLOWDOWNSTHE ME SLOWDOWN OCCURS UNDER THE FOLLOWING CONDITIONS,

MAIN LO LOW PRESSURE 1.2BAR

CAMSHAFT LO LOW PRESSURE 2BAR

THRUST BEARING HIGH TEMP 75 deg C

PISTON COOLING OIL FLOW 16.9 KG/sec

SCAVENGE AIR HIGH TEMP 75 deg C

MAIN LO HIGH TEMP 70 deg C

PISTON LO OUTLET HIGH TEMP 85 deg C

MAIN BEARING HIGH TEMP 80 deg C

EXHAUST HIGH TEMP 460 deg C

JACKET COOLING WATER HIGH TEMP 96 deg C

JACKET COOLING WATER LOW PRESSURE 0.5 BAR

PISTON LO PRESSURE LOW 0.5BAR

EXHAUST TEMP DEVIATION 45 deg C

OIL MIST DETECTOR ALARM

THRUST BEARING LOW LO PRESSURE

CONTROL AIR LOW PRESSURE

MAIN ENGINE SHUTDOWNS

THE ME SHUTDOWN OCCURS UNDER THE FOLLOWING CONDITIONS AFTER A DELAY OF 10 SECONDS,

MAIN LO LOW PRESSURE 1.0BAR

CAMSHAFT LO LOW PRESSURE 1.5 BAR

MAIN ENGINE OVERSPEED

THRUST BEARING HIGH TEMP 85 deg C

T/C LO LOW PRESSURE TRIP

JCW LOW PRESSURE TRIP

PISTON COOLING WATER LOW PRESSURE TRIP

MAIN BEARING HIGH TEMPERATURE AND PRESSURE TRIP

OIL MIST DETECTOR ALARM

SPRING AIR PRESSURE LOW TRIP

EMERGENCY MANUAL TRIP

MAIN ENGINE INTERLOCKST/G INTERLOCK

RUNNING DIRECTION (WRONG-WAY) INTERLOCK

AUXILIARY BLOWER INTERLOCK

ME START LOCKING AFTER REVERSE SYSTEM FAILURE

ME START LOCKING AFTER FAILURE OF 3 STARTING ATTEMPTS

AUXILIARY ENGINE TRIPS

ENGINE SIDE (ENGINE IS STOPPED)

LOW LO PRESSURE TRIP

OVERSPEED TRIP

COOLING WATER HIGH TEMPERATURE TRIP

GENERATOR SIDE (IT SWITCHES THE GCB OFF)

REVERSE POWER TRIP - > 0.08Prated for 6 sec

UNDER VOLTAGE TRIP - < 320V (0.8Vrated) for more than 3 sec

OVER VOLTAGE TRIP - > 440V (1.1Vrated) for more than 3 sec

OVERCURRENT OR OVERLOAD TRIP (1.21Irated) for 40 sec

SHORT-CIRCUIT TRIP ( I > 3Irated ) for 0.2 sec

LOW FREQUENCY TRIP - < 45 Hz without time delay

AUXILIARY ENGINE INTERLOCKS

CROW-BAR

LO PRIMING PUMP

BOILER SHUT DOWNBURNER CUT OUTS LOSS OF PRIMARY/F.D AIR HIGH STEAM PRESSURE FLAME FAILURE L.L WATER LEVEL

BOILER ALARMSLOW WATER LEVELLOW STEAM PRESSURELOW F.O TEMPERATURELOW ATTOMIZING PRE. FOR BURNERHIGH UPTAKE TEMP