Wire and cable in the application of the whole process, the application of the whole process will encounter a variety of problems, below Qingdao Huaqiang cable for us to sort out some of the common problems of cable and wire, for us to interpret one by one.

Basic knowledge

1, the common cable, cable according to the main use of what type?

A: According to the main use can be divided into bare power lines, insulated cables, high temperature resistant cable, shielded wire, wire and cable, frequency conversion cable, communication cable, RF coaxial cable and so on.

2. What are the insulated cables?

A: There are the following types of insulated cables that often appear: Polyethylene insulated cable, polyethylene insulating layer copper wire, nitrile rubber polyethylene compound insulating layer copper wire, rubber rubber insulated cable, agricultural machinery directly buried aluminum core plastic insulated cable, rubber insulating layer pure cotton textile copper wire, polyethylene insulating layer polyester sheath cable, power engineering and general lighting polyethylene insulating layer copper wire.

3. What kind of place is the bridge suitable for?

Answer: The bridge is suitable for laying wires and cables and frequency conversion cables in indoor and outdoor empty frames of general factories and mining enterprises, and can also be used for telecommunications networks, television broadcasting and other units to build indoors and outdoors.

4. What are the cable accessories?

A: Common electrical accessories include cable terminal equipment terminal terminals, cable middle terminal terminals, connecting pipes and terminal blocks, thick steel wiring slots, Bridges, etc.

5. What is the middle connector of the cable?

A: The equipment that connects the cable line with the electrical conductor, insulating layer, shielding layer and protective layer of the cable line to connect the cable line is called the middle connector of the cable line.

6, what is the main wiring of electrical equipment?

A: The main wiring of electrical equipment is the interface mode of key electrical equipment and bus grooves in power stations and substations, including the interface mode of the main bus grooves and the plant power system software according to a certain role.

7, in the selection of wire and cable cross-section, should follow what requirements?

A: The selection of wire and cable should follow the following criteria:

(1) The rated current of the cable should be greater than or equal to the rated current of the power supply and distribution system at the installation point;

(2) The continuous allowable current of wire and cable should be equivalent to or exceed the larger continuous current of the power supply system load;

(3) The core cross section should meet the requirements of the reliability of the short-circuit fault of the power supply and distribution system;

(4) Check whether the current meets the requirements according to the length of the cable;

(5) The less short circuit capacity at the end of the route should be able to make the protection equipment reliable posture.

8. What are the advantages of high-density polyethylene cable and oil cable?

A: (1) Easy to install, because it allows less bending radius, and light weight;

(2) will not be limited by the fluctuation of the route;

(3) Good thermal characteristics, high allowable operating temperature, large transfer volume;

(4) Cable accessories are simple, dry test structure;

(5) Easy operation and maintenance, no oil leakage problem;

(6) The price is lower;

(7) High stability, low equipment failure rate;

(8) The manufacturing process is less, the processing technology is simple, and the economic benefits are obvious.

9. What are the requirements for the clamp of fixed and immovable AC single core wire and cable? Why is that?

A: Fixture should be composed of no steel equivalent circuit, this is because when the cable core according to the current flow, the magnetic induction line is caused in its periphery, the magnetic induction line is positively related to the current flow size of the core, if the application of steel and other magnetic raw materials, according to the magnetic effect of the current, it will cause vortices in the steel to make the cable hot, and even burn the cable. Therefore, steel can not be used as a single core communication AC cable fixed fixture.

10. What are the major characteristics and advantages of the following accessories for heat-shrinkable cable joints?

A: The biggest feature of the heat shrink fittings is to replace the traditional ground stress cone with a stress pipe, which not only simplifies the construction technology, but also reduces the specifications of the terminal equipment of the connection head, convenient installation, saving time and labor, performance, and saving metal materials. The heat shrinkable cable attachment combines the advantages of both grouting and dry pack.

Qingdao Tianxing Cable Co., Ltd. focuses on the production of customized wire and cable manufacturers, main: fire wire and cable, power cable, control cable and other products, exported to more than 40 countries and regions around the world, the annual production capacity of 1 billion yuan. 6000 square meters of storage, standing hundreds of millions of inventory, order demand for rapid distribution and delivery, large prices more favorable. Hotline: 16678668098