一 电线电缆常识：电线电缆用以传输电（磁）能，信息和实现电磁能转换的线材产品． 广义的电线电缆亦简称为电缆．狭义的电缆是指绝缘电缆．它可定义为：由下列部分组成的集合体：一根或多根绝缘线芯，以及它们各自可能具有的包覆层，总保护层及外护层．电缆亦可有附加的没有绝缘的导体。A wire and cable knowledge: wire and cable used to transmit electrical (magnetic) energy, information and wire products to achieve electromagnetic energy conversion. The generalized wire and cable is also referred to simply as cable. Narrowly defined cables refer to insulated cables. It can be defined as a group consisting of: one or more insulated cores, and their respective possible cladding, total protective layer and outer sheath. Cables can also have additional uninsulated conductors.
Two wire and cable classification:
1, bare wires and bare conductor products
The main characteristics of this type of product are: pure conductor metal, non-insulating and sheathing layers, such as ACSR, copper and aluminum busbars, electric locomotive wires and cables, etc.; the processing technology is mainly pressure processing, such as smelting, rolling , Drawing, stranding / compression stranding, etc.; products are mainly used in suburbs, rural areas, user main lines, switchgear and so on.
2, power cable
The main features of this type of product are: Extruding (wrapping) the insulation around the conductor, such as overhead insulated cables, or strands of cores (corresponding to the phase, neutral and ground of the power system), such as over two core overhead insulated cables , Or increase the jacket layer, such as plastic / rubber sheathed wire and cable. The main process technologies include drawing, stranding, insulation extrusion (wrapping), cabling, armoring, sheath extrusion, etc. There are certain differences in the different process combinations of various products.
The products are mainly used for transmission of strong electric energy in the transmission, distribution, transmission, change, and power supply lines, with large currents (tens of amps to several thousand amps) and high voltages (220V to 35kV and above).
3, wire and cable for electrical equipment
The main features of this type of product are: variety of specifications, a wide range of applications, the use of voltage in 1kV and below, in the face of special occasions continue to derive new products, such as fire-resistant cables, flame retardant cable, low smoke and halogen-free / low Smoke low-halogen cable, termite prevention, rat-proof cable, oil/cold resistance/temperature/wear resistance cable, medical/agricultural/mine cable, thin-walled wire, etc.
4, communication cable and optical fiber
With the rapid development of the communications industry, from simple telephone cable telegraph cables in the past to thousands of pairs of voice cables, coaxial cables, optical cables, data cables, and even composite communication cables.
The size of such products is usually small and uniform, and the manufacturing precision is high.
5, magnet wire (winding line)
Mainly used for various motors, instruments, etc.
6. Derivation of wires and cables/new products
The derivative/new products of wire and cable are mainly due to the requirements of different applications, different application requirements, and the convenience of equipment and the reduction of equipment costs. New materials, special materials, or changes in product structure, or technological requirements, or different requirements The products of the varieties are combined and produced.
Use different materials such as flame-retardant cables, low-smoke and halogen-free/low-smoke and low-halogen cables, termite-proof cables, mouse-proof cables, oil/cold/heat-resistant cables, etc.;
Change product structure such as: fire-resistant cables;
Improve process requirements such as: medical cables;
Combination products such as: OPGW;
Easy to install and reduce equipment costs such as: prefabricated branch cables.
Three wire and cable specifications and models. Name and scope of application:
Wire and Cable Specifications Model List yjv copper core polyethylene insulated polyethylene sheathed power cables are laid indoors, in tunnels and in pipelines. The cables cannot withstand the effects of pressure and mechanical external forces.
Wire and cable specification model table vlv aluminum core
Yjv22 copper-core polyethylene insulated steel tape armored polyethylene sheathed power cables are laid indoors, in tunnels and in direct-buried soils, and cables can withstand pressure and other external forces.
Vlv22
Vv32 PVC insulated thin steel wire armored PVC sheathed power cables are laid indoors and in mines, and cables can withstand considerable tension.
Vlv32
Vv42 PVC insulated thick steel wire armored PVC sheathed power cables are laid indoors and in mines, and the cables can withstand considerable axial tension.
Vlv42
Zr-vv PVC insulated PVC sheathed flame retardant power cables are laid indoors, in tunnels and in pipelines. The cables cannot withstand the effects of pressure and mechanical external forces.
Zr-vlv
Zr-vv22 PVC insulated steel tape armored PVC sheathed flame-retardant power cables are laid indoors, in tunnels and in direct-buried soils. Cables can withstand pressure and other external forces.
Zr-vlv22
Zr-vv32 PVC insulated fine steel wire armored PVC sheathed flame-retardant power cables are laid indoors and in mines, and the cables can withstand considerable tension.
Zr-vlv32
Zr-vv42 PVC insulated thick steel wire armored PVC sheathed flame-retardant power cable is laid indoors and in the mine, and the cable can withstand considerable axial tension.
Zr-vlv42
Wire and Cable Specification Model The cable model consists of eight parts: 1. Use code - not labeled as power cable, k is control cable, p is signal cable; 2. Insulation code - z oil impregnated paper, x rubber, v polychlorine Ethylene, yj cross-linked polyethylene three, conductor material code - not labeled as copper, l is aluminum; four, the inner sheath code - q lead package, l aluminum package, h rubber sleeve, v PVC PVC sheath five , Derived code -d does not drip, p dry insulation; VI, outer sheath code seven, special product code - th wet tropical, ta dry tropical; eight, rated voltage - unit kv
Wire and cable specification list
Sywv(y), sykv Cable TV, Broadband Network Specialized Cable Structure: (Coaxial Cable) Single Oxygen-Free Round Copper Wire + Physical Foamed Polyethylene (Insulation) + (Tin Wire + Aluminum) + PVC (Polyethylene) )
2, signal control cable (rvv sheathed wire, rvvp shielded wire) for building intercom, burglar alarm, fire, automatic meter reading and other projects
3, rvvp copper core PVC insulated shielded PVC sheathed flexible cable voltage 300v/300v 2-24 core
Uses: instruments, meters, intercom, monitoring, control installation
4, kvvp: PVC sheath braided shielded cable uses: electrical appliances, instruments, distribution equipment, signal transmission, control, measurement
5, rvv (227iec52/53) PVC insulated flexible cable uses: household appliances, small power tools, instruments and power lighting
6, rv PVC insulated cable
7, rvs, rvb Suitable for household appliances, small electric tools, instruments, instruments and power lighting connection cables
8, bv, bvr PVC insulated cable uses: Suitable for electrical instrumentation and power lighting fixed wiring
9, kvv PVC insulated control cable uses: electrical, instrumentation, distribution equipment signal transmission, control, measurement
Rvv with kvv rvvp with kvvp
Differences between wire and cable specifications: The wires used in rvv and rvvp are composed of multiple wires of fine copper wire, ie rv wires.
The line used in kvv and kvvp is a hard line consisting of a single strand of thick copper wire, ie a bv line.
Difference between avvr and rvvp: Same thing, except that the internal cross section is less than 0.75 square millimeters with the name avvr greater than or equal to 0.75 square millimeters with the name rvvp.
Differences between syv and sywv: syv is a video transmission line with polyethylene insulation. Sywv is a radio frequency transmission line, physical foam insulation. For cable TV.
The difference between rvs and rvv 2 cores: rvs is a twisted two-core rv cable with no outer sheath for broadcast connections.
Rvv 2 core wire laid directly into cable, with outer sheath for power supply, control signals, etc.
Wire and Cable Specification Model Table r-Connecting Flexible Cable (wire), soft structure. v-Insulated PVC. v-PVC insulation v-PVC sheath b-flat (flat). S-twisted type. A- Tin or silver plating. F- High temperature p-braided shield p2 Copper tape shield p22-Steel tape armored y—Prefabricated, generally omitted, or polyolefin sheathed fd—product class designator, refers to the branch cable. The standards of the Ministry of Construction to be promulgated are denoted by fz, and their essence is the same.
yj-XLPE insulation
v—PVC insulated or sheathed
Zr-flame retardant
Nh—fire resistant
Wdz - Halogen-free low smoke flame retardant
Wdn - Halogen-free low-smoke refractory
Two wire and cable classification:
1, bare wires and bare conductor products
The main characteristics of this type of product are: pure conductor metal, non-insulating and sheathing layers, such as ACSR, copper and aluminum busbars, electric locomotive wires and cables, etc.; the processing technology is mainly pressure processing, such as smelting, rolling , Drawing, stranding / compression stranding, etc.; products are mainly used in suburbs, rural areas, user main lines, switchgear and so on.
2, power cable
The main features of this type of product are: Extruding (wrapping) the insulation around the conductor, such as overhead insulated cables, or strands of cores (corresponding to the phase, neutral and ground of the power system), such as over two core overhead insulated cables , Or increase the jacket layer, such as plastic / rubber sheathed wire and cable. The main process technologies include drawing, stranding, insulation extrusion (wrapping), cabling, armoring, sheath extrusion, etc. There are certain differences in the different process combinations of various products.
The products are mainly used for transmission of strong electric energy in the transmission, distribution, transmission, change, and power supply lines, with large currents (tens of amps to several thousand amps) and high voltages (220V to 35kV and above).
3, wire and cable for electrical equipment
The main features of this type of product are: variety of specifications, a wide range of applications, the use of voltage in 1kV and below, in the face of special occasions continue to derive new products, such as fire-resistant cables, flame retardant cable, low smoke and halogen-free / low Smoke low-halogen cable, termite prevention, rat-proof cable, oil/cold resistance/temperature/wear resistance cable, medical/agricultural/mine cable, thin-walled wire, etc.
4, communication cable and optical fiber
With the rapid development of the communications industry, from simple telephone cable telegraph cables in the past to thousands of pairs of voice cables, coaxial cables, optical cables, data cables, and even composite communication cables.
The size of such products is usually small and uniform, and the manufacturing precision is high.
5, magnet wire (winding line)
Mainly used for various motors, instruments, etc.
6. Derivation of wires and cables/new products
The derivative/new products of wire and cable are mainly due to the requirements of different applications, different application requirements, and the convenience of equipment and the reduction of equipment costs. New materials, special materials, or changes in product structure, or technological requirements, or different requirements The products of the varieties are combined and produced.
Use different materials such as flame-retardant cables, low-smoke and halogen-free/low-smoke and low-halogen cables, termite-proof cables, mouse-proof cables, oil/cold/heat-resistant cables, etc.;
Change product structure such as: fire-resistant cables;
Improve process requirements such as: medical cables;
Combination products such as: OPGW;
Easy to install and reduce equipment costs such as: prefabricated branch cables.
Three wire and cable specifications and models. Name and scope of application:
Wire and Cable Specifications Model List yjv copper core polyethylene insulated polyethylene sheathed power cables are laid indoors, in tunnels and in pipelines. The cables cannot withstand the effects of pressure and mechanical external forces.
Wire and cable specification model table vlv aluminum core
Yjv22 copper-core polyethylene insulated steel tape armored polyethylene sheathed power cables are laid indoors, in tunnels and in direct-buried soils, and cables can withstand pressure and other external forces.
Vlv22
Vv32 PVC insulated thin steel wire armored PVC sheathed power cables are laid indoors and in mines, and cables can withstand considerable tension.
Vlv32
Vv42 PVC insulated thick steel wire armored PVC sheathed power cables are laid indoors and in mines, and the cables can withstand considerable axial tension.
Vlv42
Zr-vv PVC insulated PVC sheathed flame retardant power cables are laid indoors, in tunnels and in pipelines. The cables cannot withstand the effects of pressure and mechanical external forces.
Zr-vlv
Zr-vv22 PVC insulated steel tape armored PVC sheathed flame-retardant power cables are laid indoors, in tunnels and in direct-buried soils. Cables can withstand pressure and other external forces.
Zr-vlv22
Zr-vv32 PVC insulated fine steel wire armored PVC sheathed flame-retardant power cables are laid indoors and in mines, and the cables can withstand considerable tension.
Zr-vlv32
Zr-vv42 PVC insulated thick steel wire armored PVC sheathed flame-retardant power cable is laid indoors and in the mine, and the cable can withstand considerable axial tension.
Zr-vlv42
Wire and Cable Specification Model The cable model consists of eight parts: 1. Use code - not labeled as power cable, k is control cable, p is signal cable; 2. Insulation code - z oil impregnated paper, x rubber, v polychlorine Ethylene, yj cross-linked polyethylene three, conductor material code - not labeled as copper, l is aluminum; four, the inner sheath code - q lead package, l aluminum package, h rubber sleeve, v PVC PVC sheath five , Derived code -d does not drip, p dry insulation; VI, outer sheath code seven, special product code - th wet tropical, ta dry tropical; eight, rated voltage - unit kv
Wire and cable specification list
Sywv(y), sykv Cable TV, Broadband Network Specialized Cable Structure: (Coaxial Cable) Single Oxygen-Free Round Copper Wire + Physical Foamed Polyethylene (Insulation) + (Tin Wire + Aluminum) + PVC (Polyethylene) )
2, signal control cable (rvv sheathed wire, rvvp shielded wire) for building intercom, burglar alarm, fire, automatic meter reading and other projects
3, rvvp copper core PVC insulated shielded PVC sheathed flexible cable voltage 300v/300v 2-24 core
Uses: instruments, meters, intercom, monitoring, control installation
4, kvvp: PVC sheath braided shielded cable uses: electrical appliances, instruments, distribution equipment, signal transmission, control, measurement
5, rvv (227iec52/53) PVC insulated flexible cable uses: household appliances, small power tools, instruments and power lighting
6, rv PVC insulated cable
7, rvs, rvb Suitable for household appliances, small electric tools, instruments, instruments and power lighting connection cables
8, bv, bvr PVC insulated cable uses: Suitable for electrical instrumentation and power lighting fixed wiring
9, kvv PVC insulated control cable uses: electrical, instrumentation, distribution equipment signal transmission, control, measurement
Rvv with kvv rvvp with kvvp
Differences between wire and cable specifications: The wires used in rvv and rvvp are composed of multiple wires of fine copper wire, ie rv wires.
The line used in kvv and kvvp is a hard line consisting of a single strand of thick copper wire, ie a bv line.
Difference between avvr and rvvp: Same thing, except that the internal cross section is less than 0.75 square millimeters with the name avvr greater than or equal to 0.75 square millimeters with the name rvvp.
Differences between syv and sywv: syv is a video transmission line with polyethylene insulation. Sywv is a radio frequency transmission line, physical foam insulation. For cable TV.
The difference between rvs and rvv 2 cores: rvs is a twisted two-core rv cable with no outer sheath for broadcast connections.
Rvv 2 core wire laid directly into cable, with outer sheath for power supply, control signals, etc.
Wire and Cable Specification Model Table r-Connecting Flexible Cable (wire), soft structure. v-Insulated PVC. v-PVC insulation v-PVC sheath b-flat (flat). S-twisted type. A- Tin or silver plating. F- High temperature p-braided shield p2 Copper tape shield p22-Steel tape armored y—Prefabricated, generally omitted, or polyolefin sheathed fd—product class designator, refers to the branch cable. The standards of the Ministry of Construction to be promulgated are denoted by fz, and their essence is the same.
yj-XLPE insulation
v—PVC insulated or sheathed
Zr-flame retardant
Nh—fire resistant
Wdz - Halogen-free low smoke flame retardant
Wdn - Halogen-free low-smoke refractory
