Types of instrument cables

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The last edit to this post was made by Stone_HOTO on 2018-10-30 at 16:56. The model of a cable consists of eight parts: first, the purpose code – it is marked as a power cable; K denotes a control cable, while P denotes a signal cable； II. Insulation code – Z for oil-impregnated paper, X for rubber, V for polyvinyl chloride, YJ for cross-linked polyethylene. III. Conductor material code – Not specified indicates copper; L indicates aluminum ； IV. Inner sheath code – Q: lead sheath, L: aluminum sheath, H: rubber sheath, V: polyvinyl chloride sheath. V. Derivative code – D: non-dripping, P: dry insulation ； VI. Outer coating code VII. Special product code – TH for humid tropical areas, TA for dry tropical areas ； 8. Rated Voltage – in units of KV. Types of instrument cables include:
1. SYWV (Y), SYKV: Cables specifically designed for cable television and broadband networks. Structure: (Coaxial cable) single strand of oxygen-free round copper wire + physically foamed polyethylene (insulation) + (tin wire + aluminum) + polyvinyl chloride (polyethylene).
2. Signal control cables (RVV insulated cables, RVVP shielded cables): Suitable for applications such as building intercom systems, security alarms, fire protection systems, and automatic meter reading.
3. RVVP: Soft cable with copper core, polyvinyl chloride insulation, and polyvinyl chloride shielding. Voltage: 300V/300V; available in 2–24 cores. Used for instruments, meters, intercom systems, surveillance, and control installations.
4. KVVP: Braided shielded cable with polyvinyl chloride sheathing. Used for signal transmission, control, and measurement in electrical appliances, instruments, and distribution systems.
5. RVV (227 IEC 52/53): Soft cable with polyvinyl chloride insulation. Used in household appliances, small power tools, instruments, and lighting systems.
6. RV: Cable with polyvinyl chloride insulation.
7. RVS, RVB: Cables suitable for connecting household appliances, small power tools, instruments, meters, and lighting systems.
8. BV, BVR: Cables with polyvinyl chloride insulation. Used for fixed wiring in electrical appliances, instruments, and lighting systems.
9. KVV: Control cable with polyvinyl chloride insulation. Used for signal transmission, control, and measurement in electrical appliances, instruments, and distribution systems.
Differences between RVV and KVV, RVVP and KVVP: RVV and RVVP consist of soft wires made up of multiple thin copper strands. KVV and KVVP use solid wires made of single-strand thick copper wires, that is, BV wires. Difference between AVVR and RVVP: They are the same; the one with an internal cross-sectional area of less than 0.75 square millimeters is called AVVR, while the one with an area of 0.75 square millimeters or more is called RVVP. Difference between SYV and SYWV: SYV is a video transmission cable that uses polyethylene for insulation. SYWV is a radio frequency transmission line with physically foamed insulation. Used for cable TV. Difference between RVS and RVV 2-core wires: RVS is formed by twisting two core RV wires together; it has no outer sheath and is used for broadcasting connections. RVV2 core wires are strung together to form a cable with an outer sheath; it is used for power supply, control signals, etc. R – connected using flexible cables (wires) with a flexible structure. V – Insulated polyvinyl chloride. V – Polyvinyl chloride insulation V – Polyvinyl chloride sheath B – Flat (flat-shaped). S-twisted pair type. A – Tin-plated or silver-plated. F – High-temperature resistance; P – Woven shielding. P2 – Copper tape shielding; P22 – Steel tape armoring. Y – Pre-fabricated type; often omitted, or polyolefin sheath. FD – Product category code, referring to branch cables. The standards to be issued by the Ministry of Construction are denoted by FZ; those with similar functions are indicated as follows: YJ – cross-linked polyethylene insulation; V – polyvinyl chloride insulation or sheathing; ZR – flame-retardant type; NH – fire-resistant type; WDZ – halogen-free, low-smoke flame-retardant type; WDN – halogen-free, low-smoke, fire-resistant type. Type, Name, Scope of Application: YJV – copper-core, polyethylene-insulated, polyethylene-sheathed power cable, suitable for use indoors, in tunnels, and within pipes, where the cable cannot be subjected to pressure or mechanical forces. YJV22 power cable with copper core, polyethylene insulation, steel tape armor, and polyethylene sheath – it can be installed indoors, in tunnels, or buried in soil; such cables are capable of withstanding pressure and other external forces. VV32 power cable with polyvinyl chloride insulation, fine steel wire armoring, and polyvinyl chloride sheathing – suitable for use indoors and in mines; the cable can withstand considerable tensile forces. VV42 power cable with polyvinyl chloride insulation, thick steel wire armor, and polyvinyl chloride sheath – suitable for use indoors and in mines; the cable can withstand considerable axial tensile forces. ZR-VV flame-retardant power cable with PVC insulation and PVC sheathing, intended for use indoors, in tunnels, and within pipes; this cable cannot withstand pressure or mechanical forces. ZR-VV22 flame-retardant power cable with PVC insulation, steel tape armor, and PVC sheath; it can be installed indoors, in tunnels, or buried in soil, and is capable of withstanding pressure and other external forces. ZR-VV32 flame-retardant power cable with PVC insulation, fine steel wire armor, and PVC sheath; it is suitable for use indoors and in mines, and can withstand considerable tensile forces. ZR-VV42 flame-retardant power cable with PVC insulation, thick steel wire armor, and PVC sheath; suitable for installation in indoor areas and mines, and capable of withstanding considerable axial tensile forces.