We all know that the transmission of electricity requires conductors, so the inside of the cable is a metal conductor, such as; Copper, aluminum, and so on, followed by the protection of metal conductors. Different conductors have different protective skins, usually using insulators such as rubber, silicone rubber, cross-linked polyethylene, polyethylene, polyvinyl chloride, etc., which are used to protect metal conductors.

With the development trend of economic globalization, more and more companies are not paying attention to the principle of proximity when purchasing items. The improvement of purchase spacing, transportation reduction, and storage reduction are also becoming increasingly crucial. The logistics transportation and storage stages of cables and wires are also crucial. Some large and medium-sized manufacturers and enterprises purchase a large amount of cables and wires at once, so many cables and wires are temporarily stored.

Control cable The model is KVV control cable, and its name is copper core, PVC insulation, and PVC sheath. Its rated voltage index is 450/750. This type of cable is mainly used in mines as a dedicated control cable. Control cable The model is KVV22, and its full name is copper core PVC insulated PVC sheathed steel tape armored KVv22 cable. The rated voltage is 450/750. The main application area is in fixed situations such as indoor or cable trenches, direct burial of pipelines, etc. The characteristic of this type of cable is its ability to withstand large mechanical external forces. The control cable model is KVVRP, which is a copper core PVC insulated PVC sheathed braided shielded control flexible cable. Its rated voltage is 450/750, and it is generally used indoors in areas with mobile shielding requirements. Control cable The model is ZRKVVRP, which is a copper core PVC insulated PVC sheathed braided shielded cable. Its rated voltage is 450/750. The main application area is indoors, in some places with mobile shielding and flame retardant requirements. The control cable model ZRKVV22, its full name is copper core polyvinyl chloride insulated polyvinyl chloride sheathed woven steel strip armored zrkvv22 cable. The rated voltage of this type of cable is 450/750, mainly used indoors, in cable trenches or directly buried pipelines. This type of cable support can be used in some places with flame retardant requirements due to its ability to bear relatively large mechanical external forces.

1、 Overview of control cables The cables connecting the control center to various systems for transmitting signals or controlling operational functions are collectively referred to as control cables. The early functions of control cables were relatively simple, including: indicator light display, instrument indication, operation of relays and switchgear, alarm interlocking system, etc. In recent years, due to the widespread application of weak current and computer networks, new functions have put forward higher requirements for the selection and application of control cables. 2、 Main series varieties of control cables The main products of control cables today include PVC insulated control cables, natural styrene butadiene rubber insulated control cables, and polyethylene insulated control cables. In addition, there are also cross-linked polyethylene insulation and ethylene propylene rubber insulation products. The oil immersed paper insulated lead wrapped control cables produced in the early years have been phased out. The rated voltage of the control cable is expressed in U0/U. The national standard issued in 1998 in China stipulates that the rated voltage of plastic insulated control cables is 450/750V. Foreign countries have proposed 600/1000V products as the conventional product series for control cables. At present, China can also produce 600/1000V plastic insulated control cables. The rated voltage of rubber insulated control cables is specified as 300/500V. The control cable core is copper core, with a nominal cross-section of 2.5mm and below, with 2-61 cores; 4-6 mm, 2-14 cores; 10mm, 2-10 cores. Control the working temperature of the cable: rubber insulation at 65 ℃, polyvinyl chloride insulation at 70 ℃ and 105 ℃. The control cables used in computer systems generally use PVC, polyethylene, cross-linked polyethylene, and fluoroplastic insulation products.