EMERGENCY SWITCHBOARD

By -

 what is Em'cy switchboard?

  • It is a switchboard which distributes emergency load that power is supplied from emergency generator during main switchboard failure.
  • It has two sections. one for 440V another is 220V.
  • Under normal conditions, 440V supply is taken from Engine Room MSB through a circuit breaker.
  • when main power is lost, this circuit breaker is tripped (opened)
  • Emergency generator comes into action and supplies power through another circuit breaker. 
  • An interlock is given to prevent closing of both breakers simultaneously.

Em'cy switchboard distribution:

  1. Em'cy bilge p/p (440V)
  2. sprinkler system (440V)
  3. one of the steering gear motor(440V)
  4. Navigation equipment.(220V)
  5. Radio Communication.(220V)
  6. Transformed and rectified supply to battery system (220V)
  7. Transitional em'cy power battery(em'cy lights for 30 mins)
  8. Low power DC system battery(Alarms and control system)

Comments

Post a Comment

Popular posts from this blog

STIFF SHIP AND TENDER SHIP and Difference between stiff and tender ship.

By -
Image
Stiff ship and tender ship     STIFF SHIP When a metacentric height and righting lever distance is large, Ship have excessive stability Ship will come to its normal upright position very quickly when its heeled. Tender ship When metacentric height and righting lever distance is very small.  Ships have less stability Ship will come to its  normal  upright position very slowly when its heeled. DIFFERENCE BETWEEN STIFF SHIP & TENDER SHIP?
Read more

SOLAS CHAPTER 11.1 SPECIAL MEASURES ENHANCE TO MARITIME SAFETY (MEO CLASS4)

By -
SOLAS - 11.1  SPECIAL MEASURES ENHANCE TO MARITIME SAFETY                           IMO NUMBER & CONTINUOUS SYNOPSIS RECORD IMO NUMBER APPLY TO          cargo ship of 300 GT and above,      passenger ship of 100 GT and above, SHIP IDENTIFICATION NUMBER:   the number consists of seven digits assigned by IHS maritime, the label begins with the letters  "IMOxx00xx0"  once assigned the number will not changed,      permanently marked     visible in color      outside diameter  not less than 200mm     inside diameter not less than 100mm     width should be proportional to height. LOCATION OF IMO NUMBER MARKED IN SHIP   highly visible area sides of hull (port,stbd) mid ship super structure  CONTINUOUS SYNOPSIS RECORD Ship history book is a permanent record kept in a ship always. and shall be available for the inspection  it contains name of the ship the port at which the ship is registered  date of registered  flag state name  name of the charterers name of the classification s
Read more

BOILER ALARMS AND TRIPS

By -
Image
MEO CLASS 4 BOILER ALARMS AND TRIPS MMD ORAL Low water level alarm - ⏰ Alarm Low low water level alarm - ⏰ Alarm / Trip High water level alarm -  ⏰ Alarm High High water level - ⏰ Alarm / Trip Low fuel oil pressure - ⏰ Alarm Low steam pressure - ⏰ Alarm High steam pressure - ⏰ Alarm / Trip Low fuel oil temperature - ⏰ Alarm High fuel oil temperature - ⏰ Alarm Flame failure - ⏰ Alarm / Trip Burner not in starting fire position - ⏰ Alarm / Trip Low combustion Air pressure - ⏰ Alarm / Trip
Read more