Marine cable

Marine cable is the wire and cable used for power, lighting and control host of various ships in rivers and seas, offshore oil platform and other water buildings. Marine cables are different from ordinary cables because they require higher technical and material requirements than ordinary cables when used in special working conditions.

Performance characteristics of marine cables

Unlike other cables, marine cables require not only basic performance requirements, but also good electrical, mechanical, aging resistance, moisture resistance, oil resistance, and cold resistance. Due to the difficulty of laying, the requirements for flexibility are higher. The characteristics of material selection stem from the high standards and strict requirements brought about by the harsh working environment, which requires marine cables to have characteristics of impact resistance, high wear resistance, corrosion resistance, UV resistance, and ozone resistance.

The purpose and laying conditions of marine cables

(1) Used for power, lighting, and control cables in ships and floating structures on rivers and seas. The working voltage is AC 500V or DC 1000V and below; (2) Soft structure cables are used for connecting mobile electrical equipment, while the rest are fixed and laid; (3) Steel wire braided cables are used in places prone to external force damage. Copper wire braided cables are used in anti-interference places; (4) All cables can be used in places that require no extension.

Requirements for the use of marine cables

(1) The cable should be suitable for various climatic conditions in various regions and can withstand various climatic conditions in cold, dry, and humid areas; (2) Ships are far from land for a long time, and there is a high demand for the safety and reliability of cables, such as good electrical performance, stability, and non extension. Cables laid in certain cabins require good oil resistance; (3) The ship has small internal space and strict requirements for cable outer diameter and outer diameter tolerance. For ease of installation, cables are required to be flexible. Some cabins (such as main engine and boiler cabins) have temperatures as high as 45-55 ℃, and some have humidity as high as 95% or above, requiring cables to have good heat resistance, moisture resistance, and mold resistance; (4) When installing or moving cables, the pulling force is generally greater than on land, and they are prone to external forces such as scratches and scratches, requiring good mechanical performance. The cables on the deck and mast are required to be resistant to sunlight, atmospheric and seawater erosion; (5) Some cables require anti-interference capability; (6) The flame retardancy and fire resistance requirements for marine wires and cables are particularly strict.

Characteristics of marine cables

The long-term allowable working temperature of the cable is 85 ℃, and the rated voltage Uo/U is 0.6/1KV. The bending radius of the cable during laying is as follows: the metal shielding armor type is 6 times the outer diameter of the cable. Non armored type, when the outer diameter is less than or equal to 25mm, it is 4 times the outer diameter of the cable, and when the outer diameter is greater than 25mm, it is 6 times the outer diameter of the cable.

Model name: CEFR/DA ethylene propylene insulated chloroprene sheathed marine power flexible cable, DA type,