ENGINE ROOM CRANE BRAKE SAFETIES
- Measure distance between magnet & armature, clearance should be 0.5 mm around the armature (Refer manual for exact value).
- If the gap is more or less than the exact value adjust the braking power not to reach the required gap.
- If any overhauling is carried out supply the current to the magnetic coil only to confirm that running shaft is operating without any resistance.
- The electromagnetic brake is operated by the brake lining. Check for the moisture on the surface of the lining to avoid slippage.
- Check the signs of the overheating and mechanical damage.
- Check the tension of the spring which carries the brake during overheating of brake assembly.
CRANE SAFETIES
- Hoisting upper limit switch.
- Hoisting lower limit switch.
- Lifting upper limit switch 82″.55″
- Lifting lower limit switch 25″.
- Anti-collision limit switch or differential switch – it is for avoiding the collision between hoisting block of jib.
- Hoist wire rope black switch.
- Joystick should be neutral.
- Oil tank level.
- High temperature for main motor.
- Emergency stop .
- Load limiter.
BOILER SAFETIES
- High steam pressure – alrm/trip.
- Low steam pressure – Alarm
- High/Low water level – Alarm.
- Low low water level -Trip.
- F.O. high temperature – Trip.
- Combustion at low pressure – Trip.
- Motor overload FD fan – Trip.
- Flame failure – Trip.
- Wind box high temperature – Trip.
- Controll air low pressure – Alrm/Trip.
- Funnel door safety – Trip.
- Smoke density high – Alarm.
- Emergency stop.
- Atomizing air pressure low – Alarm.
- Safety valves.
- water level indicators.
- Pressure gauge.
- Low fuel oil prerssure – Alarm.
- Low F.O. temperature – Alarm.
- Air vent.
STEERING GEAR SAFETIES
- Overload alarm.
- 200% insulation in motor.
- High temperature alarm.
- Self starting after power failure.
- Phase failure alarm.
- Hydraulic lock alarm.
- L.O. low level alarm.
- L.O. level low low trip.
- Short circuit trip.
- Filter clogged.
MAIN ENGINE ALARM
- Emergency stop.
- shut down.
- Slow down cancelling.
- Shut down cancelling.
- Critical speed.
- Pickup sensor failure.
- Wrong way alarm.
MAIN ENGINE SHUTDOWN
- Overspeed trip.
- L.O. low prressure trip.
- Thrust pad bearing temperature high.
- Emergency stop.
- Turbo charger L.O. low pressure.
- Camshaft L.O. Low pressure.
MAIN ENGINE SLOWDOWN
- L.O. low pressure.
- P.C.O. inlet L.O. low pressure.
- P.C.O. Low flow.
- P.C.O. non flow.
- Jacket water inlet pressure low.
- Jacket water outlet temperature high.
- Main L.O. inlet temperature high.
- Camshaft L.O. inlet temperature high.
- Scavenge air temperature high.
- Exhaust gas temperature high.
- Oil mist in crankcase high.
- Control air pressure low
- Alpha lubricator failure.
AIR CIRCUIT BREAKER(ACB) SAFETIES.
- UV coil set at 100% of rated voltage,
- Over current
- LTD 105-120% of FLC 10-120 sec.
- STD 200-600% of FLC 0.1-1 sec.
- Instant 100% of FLC instant.
- Arching contact.
- Arc runner.
- Reverse power.
- Preferential trip.
- Simultaneous closing of all 3 contacts.
- Arching contact make first and break after main contact.
LIFEBOAT SAFETIES
- Centrifugal brake.
- Two starting mode.
- Drain plug.
- Internal light.
- oil flash point should not be less than 45°C.
- Emergency filler.
- Dead man handle.
- Limit switch.
