SHIPBOARD SAFETIES IN BRIEF

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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.