TAILIEUCHUNG - Ship Knowledge: A Modern Encyclopedia (Klaas van Dokkum) - Part 4

Tham khảo sách 'ship knowledge: a modern encyclopedia (klaas van dokkum) - part 4', kỹ thuật - công nghệ, kiến trúc - xây dựng phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Switchboards and switchgear assemblies Switchboards and other switchgear assemblies basically serve to connect and disconnect generators and consumers to the main power supply system. They contain also the protection devices of the generators the cables and the consumers against overload and short-circuits. Switchboards and other control-gear assemblies can be operated by engineers but servicing and maintenance and repairs should be carried out by specialists. Laws in most countries issue a clear instruction of how to power a part of an installation safely to carry out repairs and power up safely afterwards. It also defines skills and responsibilities of the operators and maintenance people. The main differences between an industrial switchboard and a marine switchboard are protection class IP23 with closed doors. In case of open doors protection class IP20 handrails door catchers in open position measuring and indication instruments to be able to synchronise and for load sharing of both power and current etc. When electric power is required for propulsion of the ship the source of power is to be duplicated and the main busbar in the main switchboard is to be divided in two parts connected by a removable link for small installations up to full-size circuit breakers with selective protection devices for large installations. Duplicated essential consumers shall be supplied each from a side of the switchboard or when supplied from distribution-boards from separate distribution-boards each supplied from a side of the main switchboard. All of this with the same target that a single fault does neither impair the propulsion system nor impair the habitability for the crew. This single failure also includes a fire or other damage to a cable tray. Therefore the power cables and control cables to essential duplicated consumers shall be separated. Blue Star main switchboard during ioilory texting 1 Generator ran it breaker 2 generator panel Synchronising .

• Kiến trúc - Xây dựng
• shipwise
• building of ship
• various sections
• closing arrangements
• engine room
• electrial installations