Computer cables are suitable for places such as computers, instruments, and equipment with AC rated voltage of 300/500V and below to prevent external information interference; The long-term allowable working temperature of the cable is 65 ℃; The ambient temperature during installation shall not be lower than -40 ℃ for fixed installation and -15 ℃ for non fixed installation*** Small bending radius: For cables without armor layer, it should be less than 6 times the outer diameter of the cable, and for cables with armor layer, it should be no less than 12 times the outer diameter of the cable; After stable charging with a DC voltage of 500V at 20 ℃ for 1 minute, the insulation resistance should not be less than 2500M Ω· Km. There should be no open circuit between the twisted pair shields and between the twisted pair shields and the total shield; The core of the cable should withstand a 50Hz, 2000V AC voltage test for 5 minutes without breakdown between the core and the shield.

In order to reduce mutual crosstalk and external interference between circuits, the cable adopts a shielding structure. The shielding requirements for cables are based on different occasions, using methods such as twisted pair combination shielding, total shielding of twisted pair composed cables, and total shielding after twisted pair combination shielding.

There are three types of shielding materials: round copper wire, copper strip, aluminum strip/plastic composite strip. Shielded pairs have good insulation performance, and if there is a potential difference between shielded pairs during cable use, it will not affect the transmission quality of the signal.

Rated voltage of the product (U0/U): 300/500V, with a long-term working temperature of 70 ℃.

The ambient temperature during installation shall not be lower than -40 ℃ for fixed installation and -15 ℃ for non fixed installation.

***Small bending radius: The non armored layer should be less than 6 times the outer diameter of the cable, and the armored layer of the cable should not be less than 12 times the outer diameter of the cable.

The insulation resistance should not be less than 2500M after stable charging with a DC 500V voltage test at 20 ℃ for 1 minute

There should be no open circuit between each twisted pair shield and between the twisted pair shield and the total shield. The cable core to core and between shields should be subjected to a 50Hz, AC 2000V voltage test for 5 minutes without breakdown.

Control cables are suitable for use in industrial and mining enterprises, energy and transportation departments, as well as in control and protection circuits with rated AC voltage below 450/750 volts. They are PVC insulated and PVC sheathed control cables. Rated voltage: U0/U is 450/750V.

The long-term working temperature of the conductor core is 70 ℃ and 105 ℃, and the cable laying temperature is not lower than 0 ℃. The recommended allowable bending radius for cables is as follows:

Unarmored cables should not be less than 6 times the outer diameter of the cable; Armored or copper tape shielded cables should not be less than 12 times the outer diameter of the cable;

Shielded flexible cable, not less than 6 times the outer diameter of the cable.

Control cables generally refer to equipment instrument power supply/signal control representative models: KVV/KYJV/and other instrument lines, etc.

1. The two have different insulation levels. Relatively speaking, the insulation level of the control cable is slightly higher. The insulation of control cables is generally 450/750V.

2. Computer cables place more emphasis on shielding effects and have stronger anti-interference performance. Most of them adopt a combination of partial shielding and total shielding.

3. Control cables have higher mechanical strength and tensile strength than computer cables, especially those with steel armor. Suitable for outdoor or even underground laying. However, computer cables have slightly weaker mechanical strength and do not have tensile strength, and are generally only laid indoors in substations or cabinets.