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Introduction: It boasts excellent thermal and mechanical properties, outstanding electrical performance, and superior resistance to chemical corrosion. At the same time, it features a simple structure, lightweight design, and is not constrained by deployment limitations due to height differences. It is widely used in urban power grids.
NH-BV Wire: As its name suggests, the copper-core polyvinyl chloride insulated fire-resistant wire adds an extra layer of fire-resistant material on top of the BV wire. NH-DV wires are often used in environments where fires are highly likely to occur or in locations with particularly stringent fire safety requirements. The fire-resistant material used in NH-BV wires is made from glass fiber braided fluoromica tape, processed through a special manufacturing technique. Its key features include high-temperature resistance, excellent insulation, fire retardancy, and corrosion resistance. Typically, the fire-resistant layer is wrapped around the surface of the conductor. Depending on the specific fire-resistance requirements, the fire-resistant layer can be either single-layer or double-layer; naturally, the fire-resistant performance will vary accordingly based on the type of fire-resistant layer used.
The BTTZ cable is a heavy-duty, fire-resistant cable with a copper conductor and a copper sheath, featuring magnesium oxide insulation (also known as heavy-duty mineral-insulated cable). It consists of a seamless copper tube sheath on the outside, with magnesium oxide crystal powder densely packed in the middle as the insulating material. The conductors are made up of single-strand copper rods. Typically, these cables are constructed by twisting several individual conductors—or groups of conductors (with each group containing at least two conductors) —together in a rope-like configuration. Each conductor group is electrically insulated from one another and is often twisted around a central core. The entire cable is then encased in a highly insulating outer covering.
BTTZ cable is a heavy-duty fire-resistant cable with copper conductors and a copper sheath, featuring magnesium oxide insulation (also known as heavy-duty mineral-insulated cable). It consists of a seamless copper tube sheath on the outside, with magnesium oxide crystal powder filling the space in between as the insulating material. The conductor is made up of a single solid copper rod—a new type of cable design.
Cables typically consist of several individual conductors—or groups of conductors (with at least two conductors per group)—twisted together to form a rope-like structure. Each group of conductors is electrically insulated from one another and often twisted around a central core. The entire cable is then encased in a highly insulating outer covering.
Scope of Application:
Low-smoke, halogen-free flame-retardant cables are difficult to ignite and possess the ability to inhibit or prevent flame spread. Moreover, once ignited, these cables exhibit characteristics such as being halogen-free, producing low smoke, non-toxic, and non-corrosive. They are suitable for applications in high-rise buildings, hotels, hospitals, subways, nuclear power plants, tunnels, power plants, mines, oil fields, chemical industries, and other similar environments.
Low-smoke, halogen-free fire-resistant cables not only meet the performance requirements of low-smoke, halogen-free flame-retardant cables but also maintain the capability to supply power to circuits under fire conditions. They are primarily used in locations requiring fire resistance—for example, in power supply lines for fire alarms, firefighting equipment, smoke-extraction systems, emergency transportation routes, emergency lighting, and other critical facilities. Return to source for more information.
1. YJLV is an aluminum-core power cable, and its model name is: Aluminum-core cross-linked polyethylene-insulated polyvinyl chloride-sheathed power cable.
2. The meaning of the YJLV cable is as follows:
YJ----Cross-linked polyethylene insulation
L----Conductor material is aluminum
V----Polyvinyl chloride sheath
3. The operating temperature of the YJLV cable is as follows: the maximum rated operating temperature of the conductor is 90°C; the maximum short-circuit temperature of the conductor must not exceed 250°C. When laid in soil, the ambient temperature is 25°C, and the maximum duration of such operation shall not exceed 5 seconds. The installation and laying temperature must be no lower than 0°C. When laid in air, the ambient temperature is 40°C.
YJV22 refers to a cross-linked polyvinyl chloride (PVC)-insulated cable with steel tape armor. The letter "YJ" indicates cross-linking, while the letter "V" stands for the PVC insulation material. The number "22" denotes the type of armor used. This cable boasts excellent heat resistance, high current-carrying capacity, resistance to aging and corrosion, and outstanding durability. It is easy to install and is typically used in outdoor environments, where it can even be buried underground.
The YJV cable is a power cable with cross-linked polyethylene insulation and a polyvinyl chloride sheath.
This type of cable boasts excellent electrical performance and outstanding resistance to chemical corrosion. It features a simple structure and light weight, and its installation is not restricted by elevation differences. It is widely used in urban power grids as well as in factories and mining areas.
Cross-linked polyethylene significantly enhances the mechanical properties of polyethylene. Moreover, its rated operating temperature is 90 degrees Celsius—considerably higher than that of polyvinyl chloride and polyethylene-insulated cables—thus enabling a higher current-carrying capacity for the cable.
I. What does KVV cable mean?
1. The KVV cable is a type of control cable, commonly known as polyvinyl chloride-insulated control cable. It is generally used for wiring in control, signal, and measurement systems.
2. Its rated voltage is either 450/750V or 0.6/1kV.
3. When operating continuously, the conductor’s maximum working temperature must not exceed 70 degrees Celsius, and the ambient installation temperature must not be lower than zero degrees Celsius. If the cable is to be installed in environments below zero degrees Celsius, it must be preheated first.
4. Permissible bending radii: ① For non-armored cables, the permissible bending radius is six times or more the outer diameter. ② For armored or copper tape-shielded cables, the permissible bending radius is twelve times the outer diameter. ③ For shielded flexible cables, the permissible bending radius is also six times or more the outer diameter.
5. Installation scope: This cable is suitable for fixed installations, such as indoors, in cable trenches, and in pipelines.
RV is a wire and cable model, whose full name is copper-core polyvinyl chloride insulated flexible connecting wire and cable. Its maximum operating temperature is 70℃, and it is used for internal wiring in instruments and equipment. Copper-core flexible wires are primarily employed in movable parts that require flexible connections. The long-term permissible operating temperature for all RV cable models should not exceed 70℃. The rated voltages are 450/750V and 300/500V. Standard cross-sectional areas of these cables include 0.30, 0.50, 0.75, 1.0, 1.5, 2.5, 4.0, 6.0, 10.0, 16.0, 25.0, 35.0, 50.0, and 70.0 mm².
WDZN-BYJ stands for a wire that is cross-linked polyethylene insulated (copper core), halogen-free, low-smoke, flame-retardant, and fire-resistant.
An electromagnetic wire is an insulated conductor that, when energized, generates a magnetic field or induces an electric current in a magnetic field. It is primarily used in motor windings, transformer windings, and other related electromagnetic devices. Its conductors are mainly made of copper wire and should have a thin insulation layer as well as excellent electrical and mechanical properties, along with resistance to heat, moisture, and solvents. By selecting different insulating materials, wires can achieve varying performance characteristics.
RVV wire, fully known as copper-core polyvinyl chloride (PVC)-insulated and PVC-sheathed flexible wire, is also referred to as lightweight PVC-sheathed flexible wire or commonly as "soft-sheathed wire." It is a type of sheathed wire. Its primary applications include power cables, control cables, and signal transmission cables for electrical appliances, instruments, electronic equipment, and automation devices. Specifically, it can be used in burglar alarm systems, building intercom systems, and other similar applications.
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