NEWS

Home page

Home page

Industry News

Company news

2022

What are the methods to judge the quality of marine cables?

Author：

　　Marine cable, also known as marine power cable, is a kind of wire and cable used for power, lighting and total control of various ships in river, sea and offshore oil routes.

　　The main use of marine cable: used for power, lighting and total control of various ships in river and sea and offshore oil routes.

　　Marine cable executive standard: marine power cable executive standard: iec60092-350, iec60092-353 or gb9331-88.

　　The main parameters of marine power cables include type standard, core number, combustion characteristics, rated voltage, temperature, nominal cross-sectional area and other major parameters.

　　Marine cables can be divided into two categories: wire and cable for civilian ships and wire and cable for warships.

　　From the point of view of use, marine cables can be divided into ship / ship power cable, ship / ship control cable and ship / ship communication cable three categories. Its function is: marine power cable: used for power, lighting and total control of various ships in the river and sea and offshore oil routes.

　　Marine control cable: used for total control of various ships in water buildings in rivers, seas and offshore oil routes.

　　Marine communication cable: used for signal transmission and control system in various communication, electronic computer and information processing equipment.

　　Marine cable judgment method.

　　1, according to the use of the cable, laying position and working conditions to choose the appropriate type of cable.

　　2, according to the working system of electrical equipment, power supply type, cable core and load current to choose the appropriate cable cross-section.

　　3、According to the system short-circuit current calculation results, the short-circuit capacity of the segmented cable to meet the requirements.

　　4, according to the ambient temperature correction of the rated load capacity of the cable, and then determine whether the allowable current of the cable is greater than the load current.

　　5、According to the bundle laying correction factor, correct the rated load capacity of the cable, and then determine whether the allowable current of the cable is greater than the load current.

　　6、Check the line voltage drop, and judge whether the line voltage drop is less than the specified value.

　　7、Judge whether the cable is compatible with the protection device according to the rectification value of the protection device; if it is inconsistent, judge whether the suitable protection device or setting value can be changed, otherwise the suitable cable carrying surface should be selected from scratch.