Product Description
1. General Introduction
BVR cable is a type of flexible electrical cable widely used in various electrical applications. It is designed to provide reliable electrical connections in both stationary and movable electrical equipment setups.
2. Conductor
- Material: Copper is the primary conductor material in BVR cables. Copper is chosen for its excellent electrical conductivity properties. High - purity copper ensures low resistance, which minimizes power loss during electrical transmission.
- Construction: The conductor is usually made up of multiple fine copper wires that are stranded together. This stranded structure gives the cable its flexibility. For example, in common BVR cables, there may be dozens of these fine strands, depending on the cable's cross - sectional area. The stranding process is carefully controlled to ensure uniformity and mechanical strength.
3. Insulation
- Material: Polyvinyl Chloride (PVC) is the most commonly used insulation material for BVR cables. PVC offers several advantages. It has good electrical insulation properties, effectively preventing the flow of current between conductors and external objects. It is also resistant to a wide range of chemicals, which helps protect the cable in different environmental conditions.
- Thickness and Quality: The thickness of the PVC insulation is carefully determined based on the cable's rated voltage. It is manufactured to meet strict quality standards to ensure long - term insulation integrity. The insulation is smooth and free from any cracks, voids, or other defects that could compromise its performance.
4. Rated Voltage
BVR cables are available in different rated voltage levels. Commonly, you can find BVR cables with ratings such as 300/500V. The rated voltage indicates the maximum voltage that the cable can safely withstand during normal operation. This specification is crucial for determining the appropriate cable for a specific electrical application. For example, for low - power household appliances, a 300/500V BVR cable may be sufficient, while for some industrial applications with higher voltage requirements, different voltage - rated BVR cables would be needed.
5. Rated Temperature
BVR cables have a specific rated temperature range within which they can operate effectively. The PVC insulation material has a certain temperature tolerance. Typically, BVR cables can operate within a temperature range from - 15°C to 70°C. This temperature range ensures that the cable's physical and electrical properties remain stable under normal operating conditions. Exposure to temperatures outside this range for extended periods can cause degradation of the insulation and affect the cable's performance.
6. Jacketing (if applicable)
- In some cases, BVR cables may have an additional outer jacketing layer. This jacketing can provide extra protection against mechanical damage, moisture, and other environmental factors. The material of the jacketing can vary, but it is often a type of durable polymer that is resistant to abrasion and environmental influences.
- The jacketing may also have certain markings or color - coding for identification purposes. For example, different colors may be used to indicate different cable functions or voltage ratings in some installation scenarios.
7. Flexibility and Bend Radius
- One of the key features of BVR cables is their high flexibility. This allows them to be easily bent and routed in tight spaces or around moving parts of electrical equipment. The cable's design, including the stranded conductor and the quality of the insulation, contributes to its flexibility.
- There is a specific minimum bend radius specified for BVR cables. This bend radius is determined based on the cable's diameter and construction. Exceeding the recommended bend radius can cause damage to the conductor or insulation, potentially leading to electrical failures. For example, a small - diameter BVR cable may have a minimum bend radius of a few centimeters, while a larger - diameter cable may require a larger bend radius.
8. Application Areas
- Household Appliances: BVR cables are commonly used to connect various household electrical appliances such as televisions, refrigerators, washing machines, and microwave ovens to the power supply. Their flexibility allows for easy movement of the appliances without putting stress on the cable.
- Electric Tools: For power tools like electric drills, saws, and screwdrivers, BVR cables are ideal for providing power. The cable's ability to withstand frequent bending and movement during tool operation makes it suitable for these applications.
- Lighting Equipment: In the case of movable or adjustable lighting fixtures such as table lamps and floor lamps, BVR cables are used to connect the light source to the power source. This enables users to position the lights as needed.
- Small Electrical Devices: Chargers, small fans, electric heaters, and other similar small electrical devices often use BVR cables for their power connections due to the cable's flexibility and reliability.
9. Standards and Certifications
- BVR cables are manufactured in accordance with international and national standards. The most relevant international standard is often the IEC (International Electrotechnical Commission) standards. For example, IEC 60227 may govern certain aspects of BVR cable production related to PVC - insulated cables.
- In addition to meeting these standards, BVR cables may also carry various certifications. These certifications ensure that the cable meets specific quality and safety requirements. Certifications may include marks such as CE (Conformité Européene) in the European market, indicating compliance with European Union safety, health, and environmental protection requirements. In other regions, there may be local certifications that are recognized and required for the cable to be legally sold and used.
10. Packaging and Marking
- BVR cables are usually packaged in reels or coils for easy storage and transportation. The packaging is designed to protect the cable from physical damage during handling.
- The cable itself is clearly marked with important information. This includes the cable type (BVR), rated voltage, conductor cross - sectional area, and other relevant details. Markings may be printed on the insulation at regular inteBVRals along the cable length. These markings help installers and users to correctly identify and use the cable.
Product Parameters
1. Conductor Parameters
- Material: Mainly copper, usually oxygen - free copper. Oxygen - free copper has an extremely low oxygen content, which can reduce the impact on electrical conductivity, ensure high electrical conductivity, effectively reduce resistance, and decrease power loss during electrical energy transmission. Meanwhile, copper also has good ductility and mechanical strength, facilitating the bending and stretching of the cable during use without breaking easily.
- Number of Strands and Wire Diameter:
- Number of Strands: There are different specifications such as 7 - strand, 19 - strand, and 49 - strand. The more strands there are, the better the flexibility of the cable. For example, in application scenarios that require frequent bending, like the power cords of electric tools, a multi - strand structure can better adapt to the twisting and bending during the operation of the tools.
- Wire Diameter: Each strand commonly has wire diameters such as 0.12mm and 0.20mm. The wire diameter and the number of strands jointly determine the cross - sectional area of the conductor. For example, a conductor with 7 strands of 0.20mm wire diameter per strand and a conductor with 19 strands of 0.12mm wire diameter per strand will have different cross - sectional areas and performance.
- Cross - sectional Area Range: Generally, it ranges from 0.3mm² to 2.5mm² or larger, such as 0.5mm², 0.75mm², 1.0mm², 1.5mm², etc. The cross - sectional area is one of the key factors determining the current - carrying capacity of the cable. A larger cross - sectional area can carry a larger current and is suitable for connecting electrical equipment with higher power. For example, the 1.5mm² BVR cable can be used for household electrical appliances with higher power (such as electric water heaters), while the 0.3mm² one can be used for some equipment with lower power (such as small chargers).
2. Insulation Parameters
- Insulation Material: Polyvinyl chloride (PVC) is a commonly used insulation material for BVR cables. PVC has good electrical insulation properties, which can effectively prevent current leakage and ensure safe use. It also has chemical stability and can resist the erosion of certain chemical substances within a range, adapting to different usage environments such as households and offices.
- Insulation Thickness: The insulation thickness is determined according to the rated voltage. For BVR cables with a rated voltage of 300/500V, the insulation thickness is generally around 0.6mm - 1.0mm. The appropriate insulation thickness is the key to ensuring electrical insulation. If it is too thin, the insulation performance may be insufficient and leakage may easily occur; if it is too thick, it may increase the outer diameter of the cable, waste materials, and affect the flexibility and installation convenience of the cable.
- Insulation Resistance: Under normal environmental conditions, the insulation resistance value per kilometer is usually required to be relatively high. For example, at 20°C, the insulation resistance constant is not less than 36.7MΩ·km. The insulation resistance reflects the ability of the insulation material to prevent the passage of current. A high insulation resistance value means better insulation effect and can effectively prevent the unintended flow of current between the conductor and the outside.
3. Rated Voltage
Common rated voltage levels include 300/500V, 450/750V, etc. The rated voltage indicates the voltage range within which the cable can operate safely for a long time. The lower value among them is the phase voltage, and the higher value is the line voltage. For example, in a 220V single - phase electrical system for household use, choosing an BVR cable with a rated voltage of 300/500V can meet the safety requirements; while in some industrial or commercial environments where a three - phase electrical system with a higher voltage is involved, a cable with a higher rated voltage level may be required.
4. Rated Temperature
- Normal Operating Temperature Range: Generally, it is from - 15°C to 70°C. Within this temperature range, the electrical and mechanical properties of the cable remain stable. If the temperature is too low, the insulation material may become brittle, affecting its flexibility and insulation performance; if the temperature is too high, the insulation material may soften, accelerate aging, and may even cause the resistance of the conductor to increase, thereby increasing power loss and safety risks.
- Short - term Overload Temperature: It can be slightly higher than 70°C, but the duration should not be too long. In some special circumstances (such as a short - term current overload), the temperature of the cable may rise. However, if it is in a high - temperature state for a long time, it will accelerate the aging of the insulation material and the conductor and reduce the seBVRice life of the cable.
5. Outer Diameter of the Cable
The outer diameter of BVR cables with different cross - sectional areas and structures is different. For example, the outer diameter of a 0.75mm² BVR cable may be around 3.5mm - 4.5mm, and that of a 2.5mm² one may be around 5.0mm - 6.5mm. The outer diameter of the cable is important for installation. When wiring, it is necessary to consider whether the pipes, trunking, and other spaces through which the cable passes can accommodate the cable. If the outer diameter is too large, it may not be able to pass through narrow passages or may be easily compressed and damaged at bends.
6. Current - carrying Capacity
- Current - carrying Capacity Related to Multiple Factors:
- Conductor Cross - sectional Area: The larger the cross - sectional area, the greater the current - carrying capacity. As mentioned above, cables with different cross - sectional areas are suitable for equipment with different powers because of their different current - carrying capabilities.
- Insulation Material: Good insulation materials help maintain a stable current - carrying capacity. If the insulation material has poor performance, heating problems may occur under high current, affecting the current - carrying capacity.
- Ambient Temperature: The higher the ambient temperature, the more difficult it is for the cable to dissipate heat, and the current - carrying capacity will decrease accordingly. For example, in a high - temperature industrial environment, the current - carrying capacity of the cable needs to be adjusted appropriately.
- Laying Method: If the cables are laid in bundles, heat accumulation will be more significant, and the current - carrying capacity will be reduced; when laid openly, heat dissipation is better, and the current - carrying capacity is relatively higher. Taking a 0.75mm² BVR cable as an example, when the ambient temperature is 30°C and it is laid openly, the current - carrying capacity is approximately 16A - 18A; for a 1.5mm² one, the current - carrying capacity is approximately 24A - 26A.
- Consideration of Current - carrying Capacity in Application Scenarios: When selecting an BVR cable for electrical equipment, the appropriate cable cross - sectional area should be determined according to the rated current of the equipment, the actual usage environment, and the laying method to ensure that the cable will not be damaged by overheating during normal operation.
7. Color
BVR cables have multiple color options, and common colors include red, yellow, blue, green, black, white, brown, etc. Color has an important identification function in the electrical system:
- In three - phase electricity, yellow, green, and red represent phases A, B, and C respectively. This color identification helps quickly identify the lines during the installation and maintenance of the electrical system.
- Cables of different colors can also be used to distinguish different circuits or functions. For example, in household wiring, red may be used for the live wire, blue for the neutral wire, and yellow - green for the ground wire, facilitating the operation of electricians and troubleshooting.
8. Bending Radius
- The minimum bending radius is usually 4 - 6 times the outer diameter of the cable: For example, for an BVR cable with an outer diameter of 5mm, the minimum bending radius may be between 20mm and 30mm. The bending radius is an important parameter to ensure that the cable is not damaged during use. If the bending radius is too small, the conductor at the bend may be stretched or compressed, resulting in a change in the cross - sectional area of the conductor, an increase in resistance, and possible cracking of the insulation layer, thereby affecting the electrical performance and seBVRice life of the cable.
- Requirements for Bending Radius during Installation and Use: During installation and use (especially in places where the cable needs to be bent, such as around the corners of equipment and at the connection parts of movable equipment), the minimum bending radius requirements must be followed to ensure the integrity and performance of the cable.
9. Weight
The weight per unit length varies depending on the cross - sectional area, structure, and material of the cable. For example, the weight of a 0.5mm² BVR cable per meter may be a dozen grams, and that of a 2.5mm² one per meter may be dozens of grams. Weight information has certain reference value for the transportation, installation, and support structure design of the cable:
- Transportation: Understanding the weight can help to reasonably arrange transportation tools and methods to avoid damage to transportation equipment caused by overweight.
- Installation: For cables that need to be manually carried and installed, those with a lighter weight are more convenient to operate; heavier cables may require auxiliary equipment for installation.
- Support Structure Design: In some application scenarios that require long - term suspension or support of cables (such as temporary lighting wiring in large - scale event venues), it is necessary to design an appropriate support structure according to the weight of the cable to ensure safety.
10. Standards and Certification - related Parameters
- Standards to be Complied with: BVR cables need to comply with relevant standards, such as the International Electrotechnical Commission (IEC) standards (such as IEC 60227, etc.). These standards have detailed regulations on various parameters, test methods, and quality requirements of the cable. Different countries also have their own national standards. For example, in China, there are corresponding national standards to regulate the production and use of cable products in the domestic market to ensure the uniformity of product quality and safety.
- Parameters of Certification Marks: If there is an international certification such as CE certification, it means that the cable meets the testing requirements of the corresponding certification body for various parameters of the cable, including electrical safety, environmental protection, and other parameter indicators. These certifications are the passports for products to enter the international market, indicating that the product has reached an internationally recognized level in terms of quality and safety, safeguarding the interests of consumers and users.
Our Advantages
Before production, conduct a circular inspection of the equipment to ensure that the probability of problems occurring at the production end is 0%.
Professional production equipment and strict requirements for product quality are our lifelines.
Conduct self-inspection during production, spot check by batch, and conduct ex-factory inspection after leaving the factory. Conduct product production supeBVRision in strict accordance with steps that far exceed the ISO 9001 quality control standard.
Ultra-large-scale inventory is also one of our advantages.
Not only do we have cables and wires. We are a group company. Under the company, there is a power design institute, a power installation company, a production plant for power distribution boxes and cabinets, a production plant for cable trays and cable accessories, and a production plant for cable conduits. We can provide integrated seBVRices from design and research to products and then to construction. If you have any power-related issues, we welcome you to discuss with us. We will do our best to provide a solution. And these seBVRices are permanently free of charge!!!
){kind=link}