Skip to main content

MSB Safeties

  • MSB to be installed on a raised platform.
  • The location where MSB is installed should have good ventilation, illumination and affected by minimum vibration.
  • The operating floor space in front and behind the MSB should be covered with antiskid, insulated rubber mats with a minimum thickness of 15 mm.
  • There should be adequate space around allowing comfortable operation and maintenance.
  • Door opening mechanism should be interlocked with power supply.
  • Panel doors should be in locked position.
  • The enclosure should be drip proof.
  • MSB should be dead front type. (i.e. All the live conductor should pass behind MSB)
  • No water or oil pipes should pass above the MSB.
  • Every equipment onboard must be properly earthed. Also, MSB must be properly earthed.
  • Every incoming and outgoing feed must be protected by a switch fuse or circuit breaker.
  • Insulation resistance should not be less than 1 Mega Ohm in any case. Insulation Resistance (IR) to be checked and records are maintained.
  • All meters must be calibrated periodically and records are maintained.
  • All the meters, switches, fuses, push button, indicating lamps, etc. should be in working condition and identified with individual nameplate or tag.
  • All the interlocks must be in working condition.
  • Operating switchgear, tools such as circuit breaker handle, fuse puller, lamp grip, etc. must be readily available and to be used.
  • Appropriate ready to use fire extinguishers should be positioned nearby. (CO2and DCP)
  • Red tag/nameplate indicating high voltage and danger sign should be fitted
  • Wiring diagram laminated or framed indicating supply system must be displayed nearby.
  • Earth fault indication should be fitted and displayed in front panel.
  • Charts indicating drill procedures in case of electric shocks must be displayed near MSB.
  • All the appropriate spares should be properly preserved and protected, individually packed and identified, and should be readily available for use.


Labels:

Comments

Post a Comment

Popular posts from this blog

Difference Between A, B & C-Class Divisions?

IMO Symbol A Class Division  IMO Symbol B Class Division  SOLAS has tables for structural fire protection requirement of bulkheads and decks. The requirements depend on the spaces in question and are different for passenger ships and cargo ships. The Administration has required a test of a prototype bulkhead or deck in accordance with the Fire Test Procedures Code to ensure that it meets the above requirements for integrity and temperature rise. Types of Divisions: "A" Class "B" Class "C" Class "A" Class: "A" class divisions are those divisions formed by bulkheads and decks which comply with the following criteria: They are constructed of steel or equivalent material They are suitably stiffened They are constructed as to be capable of preventing the passage of smoke and flame to the end of the one-hour standard fire test. they are insulated with approved non-combustible materials such that the average tempera...
14 comments
Read more

Bilge Injection Valve

Bilge Injection is a valve that enables the engine room bilges to be pumped out directly overboard in the event of an emergency such as flooding. The valve is normally fitted to the end of a branch connection with the main sea water suction line. This enables large main seawater cooling pumps to be used as a bilge pump in an emergency. Emergencies like fire and flooding involve the use of seawater. If there is a fire, seawater is the biggest resource of water available in the sea. Similarly, if it involves flooding of the engine room, cargo spaces or any other place on the ship for that matter; you would again require pumping the sea water out of the ship. In both these cases, you require pumps.  There are two valves in close proximity namely main injection valve and bilge injection valve. Both of them have their own independent controls. The diameter of the bilge injection valve is kept nearly 66% of the main valve diameter which draws water directly from the sea th...
Post a Comment
Read more

Load Line & Why it is Important

Merchant ships have a marking on their hull know as the Plimsoll line or the Plimsoll mark, which indicates the limit until which ships can be loaded with enough cargo, internationally, the Plimsoll line on a ship is officially referred to as the international load line. Every type of ship has a different level of floating and the Plimsoll line on a ship generally varies from one vessel to another.  All vessels of 24 meters and more are required to have this Load line marking at the centre position of the length of summer load water line. There are two types of Load line markings:- Standard Load Line marking – This is applicable to all types of vessels. Timber Load Line Markings – This is applicable to vessels carrying timber cargo. These marks shall be punched on the surface of the hull making it visible even if the ship side paint fades out. The marks shall again be painted with white or yellow colour on a dark background/black on a light background.  ...
15 comments
Read more