Computer cable manufacturer

Computer cables for coal minesComputer cables for coal minesAs a power supply equipment for communication, monitoring, detection, alarm, and control systems, intrinsically safe cables are mainly used in environments containing mixtures such as petroleum, chemical, textile, and coal mines. The cable can withstand a single vertical combustion test,Cables have the performance of resisting magnetic field interference, electromagnetic radiation interference, and electrostatic interference

computer cable

1： Product Features and Applications This product is suitable for communicationU0/Ufor300/500VThe power, metallurgy, petrochemical and other industries mainly use electronic computers for automatic control systems, computer distributed control systems, automation control systems as control lines, and electronic computer cables for testing instruments and meters.

2： Product execution standards

Flame retardant performance test executionGB12666-90standard

3： Using rated current voltage:U0/U 300/500KV

2． Working temperature: Polyethylene insulation not exceeding70℃

Cross linked polyethylene insulation90℃

Low smoke halogen-free flame-retardant polyolefin70℃

Low smoke halogen-free flame-retardant cross-linked polyolefin90℃ and125Two types of temperature

3． Environmental temperature: PVC sheath: fixed installation-40℃, non fixed installation-15℃

4． The temperature for cable installation and laying should not be lower than0℃。

5． Allowable bending radius of cable: Non armored cable refers to the outer diameter of the cable6times

Copper tape shielded or steel tape armored cable refers to the outer diameter of the cable12times

6Purpose: Used for cables with high anti-interference performance requirements, and can also be used for cables with high anti-interference performance and instrument connection lines

1： The flexibility requirements for the conductive core of mining cables are higher for drill cables and mining machine cables; The following measures are taken for the wire structure:

1Using softer small-diameter copper single wires, bundled and twisted at small intervals. The bending and twisting properties of the entire cable are also affected by the insulation and sheath structure, so it cannot be assumed that the finer the single wire, the smaller the pitch, the better.
2， The use of co directional bundle twisting and compound twisting can improve flexibility.
3In order to facilitate the relative sliding of wires in the insulation layer and facilitate installation and maintenance. The single wire of drill cables and small section mining machine cables should be tinned, and the large section mining machine cables should be insulated with paper tape outside the wire.
2： Insulation layer Require sufficient electrical insulation performance
1， Adopting a glue content of not less than one percent35The rubber
2The insulation thickness is thicker than that of general rubber sheathed cables
3， Using rubber with good electrical properties and adopting good extrusion technology (such as extrusion vulcanization continuous production line)
3： Layer
The use of semiconducting rubber as a layer should ensure that its transition resistance meets the standard requirements to ensure reliable operation of the relay protection system in case of accidents.
4： Pad core
1， The cushion core should fully serve as a buffer when the cable is subjected to impact or compression, while not being too large in outer diameter. Require a reasonable design to fill the gaps between insulated core wires.
2， The mechanical performance should not be lower than the requirements of insulating rubber.
3， Cannot adhere to the insulated wire core.
5： Cable structure
1， To improve the flexibility of the cable, smaller pitch multiples should be used.
2， To ensure the mechanical strength of the ground wire core, the cross-section of the ground wire core is larger than that of general cables. For small cross-section products, the same cross-section as the main conduit is used.
3， The control core is first individually twisted into a group, and then combined with the main core to form a cable.
6： Protective layer
1， Require sufficient mechanical strength and good wear resistance. Underground cables require flame retardancy. Therefore, chloroprene rubber is used, and the rubber content is not less than 50%.
2，6KVMobile rubber sheathed cables require sufficient electrical insulation of the sheath to improve its resistance to corona cracking.