Conductor Cross-Sectional Area: The conductor cross-sectional area of this cable is 70mm², which is determined based on the demand for high-current grounding. A larger cross-sectional area means that the conductor can carry a larger fault current. When a device has a leakage fault, it can quickly conduct a large amount of current into the ground, avoiding equipment damage or personal injury caused by excessive current. At the same time, the large cross-sectional area also helps to reduce the resistance of the conductor, improve current conduction efficiency, and ensure the smoothness of the grounding loop.
Conductor Structure and Resistance: The conductor adopts a stranded bare copper structure, composed of multiple strands of fine Copper Wires with a diameter of about 0.3-0.5mm. This stranded structure has many advantages. Compared with a solid Copper Conductor, its Flexibility is greatly improved, and it can easily adapt to complex installation environments, such as bending and turning in narrow spaces around corners and pipes, reducing construction difficulty. In addition, the stranded structure also enhances the fatigue resistance of the conductor. During long-term use, even if it is subjected to slight vibration or stretching, it is not easy to break, prolonging the service life of the cable. At a standard ambient temperature of 20°C, the maximum resistance of the conductor does not exceed 0.268Ω/km. The low resistance characteristic ensures that current can be conducted quickly and efficiently, reducing energy loss during current transmission and also reducing heat generated due to excessive resistance, further ensuring the safety of the grounding system.
Insulation Layer Parameters: The insulation layer is made of 90°C high-temperature resistant PVC material with a thickness of about 2.0-2.5mm. This thickness of the insulation layer can not only provide good electrical insulation performance, effectively isolate the conductor from the external environment, prevent leakage accidents, but also maintain structural stability in high-temperature environments. Under the high-temperature condition of 90°C, the insulation layer will not soften, flow, crack, etc., and can still maintain its insulation effect. At room temperature, the insulation resistance of the insulation layer is greater than 100MΩ·km. This high-performance index ensures that during long-term use, even if affected by factors such as humidity and dust, the insulation performance will not decrease significantly, providing continuous safety guarantee for the grounding system.
Rated Voltage: The rated voltage of the cable meets the requirements of relevant grounding specifications and is mainly applicable to the grounding loop of low-voltage systems. In general industrial and civil electrical systems, the voltage of the grounding loop is usually low. The rated voltage design of this cable can meet the needs of these systems, ensuring that the insulation layer of the cable will not be broken down under normal working and fault conditions, maintaining the stability of the grounding system.
Appearance Identification: The appearance of the cable is green and yellow alternately, which is an internationally accepted grounding identifier with clear 辨识度. The alternating arrangement of green and yellow follows strict standards, and the length of each color segment is usually between 50-100mm. This standardized identification allows electricians and installers to quickly identify the Grounding Cable during construction, avoiding confusion with other functional cables such as phase lines and neutral lines, thereby reducing the risk of wiring errors and ensuring the safe operation of the electrical system.
Length Specification: Each roll of cable has a length of 100 meters. This length design not only considers the grounding wiring needs of most projects but also facilitates transportation and storage. For small projects, a length of 100 meters may be sufficient for the wiring of the entire grounding system; for large projects, multiple rolls of cables can be connected through connectors to form a longer grounding line. At the same time, the length of 100 meters allows the cable to be easily wound on the reel during transportation, saving transportation space and facilitating handling and unfolding at the construction site.
Power System:
Grounding of Distribution Equipment: In distribution equipment in places such as substations and distribution rooms, such as switch cabinets, circuit breakers, disconnectors and other equipment, their metal enclosures must be reliably grounded. This cable can be used as a grounding branch to connect the enclosures of these equipment to the grounding grid. When an insulation fault occurs inside the equipment causing the enclosure to be live, the fault current can quickly flow into the grounding grid through this cable, reducing the potential of the equipment enclosure to a safe range, avoiding electric shock accidents when operators touch it, and at the same time, it can trigger the action of the relay protection device to cut off the fault power supply and prevent the accident from expanding.
Transformer Grounding: The transformer is a key equipment in the power system, and its enclosure, iron core and other parts need to be grounded to ensure safety. This cable can be used for the protective grounding of the transformer, connecting the non-live metal parts of the transformer to the grounding system. When the transformer has leakage or insulation damage, it can timely conduct the current into the ground, protect the safety of the transformer itself and surrounding equipment, and also prevent high voltage from entering the low-voltage system, causing damage to electrical equipment and personal injury.
Industrial Heating Equipment:
Grounding of Industrial Electric Furnaces: During the operation of industrial electric furnaces, the furnace body temperature is extremely high, and its metal enclosure needs to be reliably grounded to ensure the safety of operators. The 90°C High-temperature resistant insulation layer of this cable can adapt to the high-temperature environment around the electric furnace. Even if it is exposed to high-temperature baking for a long time, the insulation layer will not age and deteriorate, ensuring the smoothness of the grounding loop. When the electric furnace has a leakage situation, the fault current can be quickly conducted into the ground through the cable, avoiding electric shock accidents.
Grounding of Drying Kilns and Heat Treatment Equipment: Drying kilns and heat treatment equipment generate a lot of heat during operation, and the temperature of the equipment enclosure is also high. Using this cable as a grounding cable can maintain stable grounding performance in high-temperature environments, timely conduct away the static electricity and fault current on the equipment enclosure, prevent fires or equipment failures caused by static electricity accumulation, and ensure the personal safety of operators.
Building Electrical:
Lightning Protection Grounding: Buildings need to be equipped with lightning protection grounding systems to resist lightning strikes. This cable can be used to connect lightning rods, lightning strips, air terminals and other lightning protection devices to grounding electrodes to form a complete lightning protection loop. When a building is struck by lightning, the powerful lightning current can quickly flow into the ground through this cable, avoiding damage to the electrical equipment and structure inside the building by the lightning current, and protecting the safety of the building.
Protective Grounding and Working Grounding: In the electrical system of buildings, the metal enclosures of various electrical equipment such as air conditioners, water pumps, elevators, etc. need protective grounding to prevent electric shock accidents when the equipment leaks. This cable can be used as the protective Grounding Wire for these equipment to ensure reliable grounding. At the same time, in some systems that require working grounding, such as the grounding systems of computer rooms and communication rooms, this cable can also meet the requirements, providing a stable reference potential for the system, reducing interference, and ensuring the normal operation of the equipment.
New Energy Field:
Grounding of Photovoltaic Power Stations: Photovoltaic modules, inverters, combiner boxes and other equipment in photovoltaic power stations need reliable grounding to cope with harsh outdoor environments and possible leakage situations. This cable can adapt to the outdoor environment of photovoltaic power stations, withstand the impact of natural factors such as wind, sun, rain, etc. At the same time, its good conductivity can timely conduct the fault current and static electricity of the equipment into the ground, protect the normal operation of photovoltaic equipment, and improve the safety and reliability of the power station.
Grounding of Wind Farms: The nacelle, tower and other parts of wind turbines need to be grounded to ensure safety. This cable can be used for the protective grounding of wind turbines. During the operation of wind turbines, it can conduct away the static electricity and fault current of the equipment, prevent equipment failures caused by static electricity or leakage, and also resist the impact of natural disasters such as lightning strikes, ensuring the stable operation of wind farms.
Large Public Places:
Grounding of Subway Systems: The subway system has many electrical equipment and a complex environment, requiring a reliable grounding system. This cable can be used for equipment grounding and track grounding in subway stations, connecting the metal enclosures of various electrical equipment and tracks to the grounding system. During the operation of the subway, it can timely conduct away the fault current of the equipment and the stray current of the track, prevent the stray current from corroding the track and surrounding metal structures, and ensure the safety of passengers and staff.
Grounding of Airports: The terminal buildings, runway lighting systems, communication and navigation equipment of airports all need to be grounded. This cable can be used for grounding these equipment, ensuring the normal operation of the equipment, and at the same time, resisting interference such as lightning strikes, ensuring the stability and reliability of the airport's communication and navigation systems, and ensuring the safe take-off and landing of flights.
Conductor Material: The conductor is made of high-purity bare copper with a purity of more than 99.9%. High-purity bare copper has excellent conductivity, which is the key to ensuring that the grounding cable can quickly conduct fault current. Copper has high conductivity and low resistance, which can conduct fault current into the ground in the shortest time, reduce the duration of the fault, and reduce the risk of accidents. At the same time, the bare copper surface has no insulation layer, further reducing the resistance of current conduction and ensuring the smoothness of the grounding loop. In addition, copper has good ductility and toughness, so that fine copper wires are not easy to break during stranding, ensuring the stability of the conductor structure. Bare copper will form a thin oxide film in the air, which not only does not affect its conductivity but also can play a certain anti-corrosion role, delaying the corrosion rate of copper and prolonging the service life of the cable.
Insulation Layer Material: The insulation layer is made of 90°C high-temperature resistant PVC material, with heat-resistant stabilizers and flame retardants added to ordinary PVC materials. Heat-resistant stabilizers can improve the thermal stability of PVC materials, making them not decompose or age in a high-temperature environment of 90°C, maintaining good mechanical properties and insulation performance. Flame retardants endow the insulation layer with certain flame retardancy. When encountering an open flame, it can inhibit the spread of the flame, burn slowly, and can self-extinguish after leaving the fire source, reducing the possibility of fire and improving the safety of the cable in case of fire. The PVC material also has good chemical corrosion resistance, can resist the erosion of oil, moisture, acid, alkali and other substances, and adapts to complex environments such as industrial and outdoor. At the same time, its mechanical strength is high, can withstand a certain amount of friction, extrusion and stretching, and protect the internal copper conductor from damage.
Style Design:
Green-Yellow Identification: The insulation layer of the cable adopts a green-yellow alternating design, which is an internationally accepted grounding identifier with strong 辨识度. The proportion and interval of colors are strictly regulated, and usually, green and yellow each account for a certain proportion, alternating evenly. This clear identification allows staff to quickly identify the grounding cable during construction and maintenance, avoid confusion with other cables, and ensure the correct connection of the grounding system.
Stranded Structure: The stranded structure of the conductor not only improves the flexibility of the cable but also makes its appearance more regular. Multiple strands of fine copper wires are stranded together according to a certain stranding pitch to form a circular conductor cross-section, which is closely combined with the insulation layer, making the overall structure of the cable compact and easy to install and lay.
Reel Packaging Style: The cable adopts a 100-meter per roll reel packaging. The reel is usually made of hard paper tube or plastic material, with a certain strength, which can protect the cable from extrusion and damage during transportation and storage. The design of the reel makes the cable easy to unfold during use, avoiding knotting and 缠绕，and improving construction efficiency.
Selection and Inspection of Copper Rods: The first step in production is to select high-purity electrolytic copper rods with a purity of more than 99.9%. The copper rods are strictly inspected, including appearance inspection and chemical composition analysis, to ensure that the surface of the copper rods is smooth, free of cracks and impurities, and the chemical composition meets the standards, laying a good foundation for the subsequent copper wire processing.
Copper Wire Drawing and Annealing: The qualified copper rods are sent to the wire drawing machine for drawing processing. Through a series of wire drawing dies with different apertures, the copper rods are gradually drawn into fine copper wires with a diameter of about 0.3-0.5mm. During the drawing process, the drawing speed, tension and lubrication cooling system are controlled to avoid the copper wire from being affected by overheating or breaking due to excessive tension. The drawn copper wire needs to be annealed. The copper wire is heated to 300-500°C, kept for a certain time, and then slowly cooled. Annealing treatment can eliminate the internal stress of the copper wire, improve its flexibility and ductility, make the copper wire not easy to break during the subsequent stranding process, and also restore the conductivity of the copper wire.
Conductor Stranding: Multiple strands of annealed fine copper wires are stranded through a stranding machine to form a 70mm² conductor. According to the design requirements, the number of copper wire strands and the stranding pitch are determined, and the stranding pitch is usually 10-15 times the outer diameter of the conductor. During stranding, ensure that each strand of copper wire is evenly stressed, arranged closely and neatly, avoiding loose strands, broken strands, jumping strands and other phenomena. The Stranded Conductor needs to undergo appearance and size inspection to ensure that the diameter and roundness of the conductor meet the standards.
Insulation Layer Extrusion: The stranded conductor is sent to the extruder, and at the same time, 90°C high-temperature resistant PVC material (added with green-yellow color masterbatch) is added to the hopper of the extruder. The PVC material is heated, melted and plasticized in the extruder, and then evenly wrapped around the outer layer of the conductor through an extrusion die to form an insulation layer with a thickness of 2.0-2.5mm. During the extrusion process, the extrusion temperature, speed and pressure are precisely controlled to ensure that the insulation layer has uniform thickness, smooth surface, is closely combined with the conductor, and has no bubbles, depressions, scratches and other defects. The addition ratio of green-yellow color masterbatch needs to be precisely controlled to ensure that the color of the insulation layer is uniform and bright, meeting the requirements of grounding identification.
High-Temperature Aging Test: The cable after extruding the insulation layer needs to undergo a high-temperature aging test. The cable is placed in a constant temperature environment of 90°C for a certain time (usually 168 hours), and then taken out and cooled to room temperature. By conducting appearance inspection, insulation resistance test, tensile strength and elongation at break test on the aged cable, the performance stability of the insulation layer in high-temperature environment is inspected to ensure that it will not age and deteriorate due to high temperature during long-term use.
Spark Test: After the high-temperature aging test, the cable undergoes a spark test. The cable is passed between high-voltage electrodes, and a certain high voltage (usually 10-30kV) is applied between the cable and the electrodes. If there are defects such as pinholes and cracks in the insulation layer, the high voltage will break down the defect and generate sparks, and the testing machine will alarm immediately. The operator will mark and handle the defective cable to ensure that the insulation layer of the delivered cable is intact.
Winding and Inspection: The cable that has passed all tests is pulled to the winding machine and wound into a 100-meter length on a hard paper tube or plastic reel. During the winding process, the winding tension is controlled to make the cable wind neatly and tightly, avoiding looseness and distortion. After winding, each roll of cable undergoes a final inspection, including appearance inspection (color, identification, surface quality), length measurement, electrical performance sampling inspection, etc., to ensure that the product quality meets the standards. Qualified cables are packaged and prepared for delivery.
Packaging Materials: Hard paper tubes or plastic reels are used as inner packaging. These materials have certain strength and rigidity, can bear the weight of the cable itself and external extrusion, and prevent the cable from
Order Processing: After receiving the customer's order, the sales staff will confirm the product specifications, quantity, delivery address, and delivery time with the customer. For special requirements such as customized lengths or packaging, they will communicate with the production and logistics departments to ensure that the requirements can be met. The order information is then entered into the system, and a picking list is generated for the warehouse.
Inventory Check and Picking: The warehouse staff will check the inventory according to the picking list. They will verify the product model, specifications, batch number, and expiration date (if applicable) to ensure that the products are in good condition and meet the order requirements. The cables are picked from the warehouse shelves and placed in the designated area for packing. During picking, care is taken to avoid damaging the packaging or the cables themselves.
Inspection Before Shipping: Before shipping, the picked cables undergo a final inspection. This includes checking the appearance of the cables (such as the integrity of the insulation layer, the clarity of the green-yellow marking), the tightness of the packaging, and the accuracy of the labels. Random sampling is also conducted to test the electrical performance (such as insulation resistance) to ensure that the products meet the quality standards.
Documentation Preparation: The necessary shipping documents are prepared, including the invoice, packing list, certificate of conformity, and waybill. The invoice contains details such as the product name, quantity, unit price, and total amount. The packing list specifies the contents of each package, including the number of rolls and the length of each cable. The certificate of conformity confirms that the products meet the relevant standards and specifications. These documents are attached to the shipment or sent to the customer in advance as required.
Notification to Customer: Once the shipment is ready, the customer is notified of the shipping details, including the waybill number, carrier, estimated arrival time, and contact information of the delivery person. This allows the customer to track the shipment and make arrangements for receiving the goods.
Sample Request: Customers can request samples through various channels such as phone calls, emails, or the company's website. They need to provide information such as their company name, contact person, contact information, and the intended application of the cable. The company will evaluate the sample request and, in most cases, provide free samples, but the customer may be responsible for the shipping costs.
Sample Preparation: The samples are prepared from the same batch of products as the formal orders to ensure consistency. The length of each sample is usually 1-5 meters, which is sufficient for customers to conduct tests such as appearance inspection, measurement of conductor cross-sectional area, insulation resistance test, and high-temperature resistance test. The samples are packed in small packages with labels indicating the product specifications and batch number.
Sample Delivery: The samples are shipped to the customer via express delivery. The company tracks the shipment and informs the customer of the tracking number so that they can check the delivery status. A cover letter is included with the samples, providing information about the product and the company's contact details for any questions or feedback.
Feedback Collection: After the customer receives the samples, the company follows up to collect their feedback. This includes the customer's evaluation of the sample's quality, performance, and suitability for their application. The feedback is used to improve the product and service, and to better meet the customer's needs.
Quality Guarantee: The company provides a quality guarantee period for the cable, usually 1-3 years from the date of delivery. During the guarantee period, if the cable has quality problems (such as insulation layer damage, conductor breakage, or failure to meet the specified performance parameters) due to manufacturing defects, the customer can apply for repair, replacement, or refund. The company will send technical personnel to inspect the problem and handle it according to the actual situation.
Technical Support: A professional technical team is available to provide customers with technical support. This includes answering questions about the installation, use, and maintenance of the cable. The technical team can provide guidance on how to properly lay the cable, connect it to grounding devices, and test the grounding resistance. They can also offer solutions to any technical problems encountered during use.
Complaint Handling: If customers have complaints about the product or service, they can contact the after-sales department. The after-sales staff will record the details of the complaint and investigate it promptly. A response is provided to the customer within a specified time (usually 24-48 hours), and a solution is proposed. The company takes customer complaints seriously and uses them as an opportunity to improve its products and services.
Regular Follow-up: The company conducts regular follow-up with customers who have purchased the cable to understand their usage experience and any problems they may have encountered. This helps to build long-term relationships with customers and provides valuable feedback for product improvement. The follow-up can be done through phone calls, emails, or on-site visits, depending on the customer's preferences and the nature of the project.
Hongtai Cable Technology Co., Ltd
Correo electrónico: export@qlcables.com
sales@qlcables.com
Tel/WhatsApp:+86-18032066271
Agregue: Zona de desarrollo industrial de Xiaokou, condado de Ningjin, ciudad de Xingtai, provincia de Hebei, China
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