Marine power cable is a special kind of wire and cable, which is mainly used for power supply, control and communication wires and cables for various ships, water platforms, ports, etc. in rivers, lakes and seas. It has the advantages of waterproof, flame retardant, corrosion resistance, acid and alkali resistance, soft and easy to bend. Marine cables can also be used in metallurgy, chemical engineering, construction and other industries. We cannot use cables that are not qualified.

Marine cables can be divided into marine power cables, marine communication cables, marine control cables, marine radio frequency cables, marine electric wires, marine coaxial cables, shore power cables, etc.

Marine cables can be divided into rubber insulated marine cables, PVC insulated marine cables, XLPE insulated marine cables and so on.

Selection procedures and principles of cables in ship power system

1, choose suitable cable type according to cable's usage, laying position and working condition.

2, choose suitable cable section according to the working system, power type, cable core and load current.

3, according to the calculation results of the system short-circuit current, whether the short circuit capacity of the fragmented cable meets the requirements.

4. According to the ambient temperature, the rated current carrying capacity of the cable is corrected, and then the permissible current of the cable is larger than the load current.

5. According to the correction coefficient of the bundle laying, the rated current carrying capacity of the cable is corrected, and then the permissible current of the cable is judged to be larger than the load current.

6, check the line voltage drop to determine whether the line voltage drop is less than the specified value.

7. According to the setting value of the protection device, it is necessary to judge whether the cable is compatible with the protective device; if it is not coordinated, determine whether the appropriate protective device or setting value can be changed, otherwise the suitable cable surface should be re selected.

Model selection of marine cables

The following factors should be taken into account in the selection of marine cable models:

1, the use of cables - for power, lighting and radio communications.

2. Cable laying location - dry, wet, low temperature and whether shielding is required.

3, working conditions - fixed laying, pipe number and mobile.