1kv 3X1X120 mm2 Cable Nyy Triple, 2X1X10 mm2 Nyy Duplex

3X1X120mm²: "3X1" clearly indicates a triple-core structure, that is, 3 individually insulated single-core conductors are stranded in parallel, suitable for phase line transmission (A, B, C three phases) in the three-phase four-wire system, and can adapt to symmetric load equipment without additional neutral lines; "120mm²" is the cross-sectional area of a single-core conductor, determining its high current-carrying characteristics. When laid in air at an ambient temperature of 30°C, the continuous current-carrying capacity reaches 210A, and the short-term (1 hour) overload current-carrying capacity can reach 252A, with an adapted power of about 105kW (calculation formula: P=√3×380V×210A×0.85≈105kW), which can meet the power supply needs of large industrial motors, central air-conditioning hosts and other high-power equipment.

2X1X10mm²: "2X1" is a duplex structure, composed of 2 individually insulated single-core conductors, suitable for single-phase 220V circuits (live wire and neutral wire) or DC circuits; the cross-sectional area of "10mm²" enables its continuous current-carrying capacity to reach 55A (at 30°C environment), and the overload current-carrying capacity is 66A, with an adapted power of about 11kW (P=220V×55A×0.9≈11kW, power factor is 0.9), suitable for medium and small power equipment such as household air conditioners and electric water heaters.

Conductor Structure: The 120mm² conductor is stranded by 61 Copper Wires with a diameter of 0.5mm, with a total outer diameter of about 14.5mm, and the stranding pitch is 16 times the outer diameter, ensuring that each copper wire is evenly stressed when bending; the 10mm² conductor is stranded by 7 copper wires with a diameter of 1.3mm, with an outer diameter of about 4.2mm, and the pitch ratio is 18 times, improving Flexibility to adapt to laying in narrow spaces.

Insulation Layer Parameters: Both cables use temperature-resistant PVC Insulation layers. The insulation thickness of the 120mm² conductor is 1.4mm, and that of the 10mm² conductor is 0.7mm, both meeting the insulation strength requirements of 1kV voltage level (breakdown field strength ≥20kV/mm). The volume resistivity of the insulation layer is ≥1×10¹⁴Ω·cm (at 20°C), ensuring no leakage current hazards.

Overall Dimensions: The stranded outer diameter of the 3X1X120mm² cable is about 38mm, with a bending radius ≥456mm (12 times the outer diameter); the stranded outer diameter of the 2X1X10mm² cable is about 12mm, with a bending radius ≥144mm, which can adapt to various laying methods such as pipe laying and bridge laying.

Rated Voltage and Frequency: The rated voltage is 0.6/1kV (phase voltage 0.6kV, line voltage 1kV), applicable frequency is 50/60Hz, compatible with mainstream power system frequency standards at home and abroad.

When the ambient temperature rises to 40°C (such as summer industrial workshops), the current-carrying capacity of the 3X1X120mm² cable is corrected to 180A (correction coefficient 0.86), and that of the 2X1X10mm² cable is corrected to 47A (coefficient 0.85);

When laid underground, if the soil thermal resistance coefficient is 1.2K·m/W, the current-carrying capacity of 120mm² drops to 190A, and that of 10mm² drops to 50A;

When laid in pipes (multiple pipes in common), the current-carrying capacity of 3 pipes in common needs to be multiplied by a coefficient of 0.8 to ensure good heat dissipation.

Main Line of Industrial Plant: In large industrial scenarios such as automobile manufacturing plants and metallurgical workshops, the cable is used as the main incoming line of the workshop to connect the low-voltage side of the transformer and the workshop distribution cabinet, which can support the simultaneous operation of 5 50kW injection molding machines. Its high current-carrying characteristics can resist the inrush current (about 6 times the rated current) when the equipment starts, and the oil resistance of the insulation layer (after 72 hours of immersion in engine oil, the volume resistivity retention rate is ≥90%) can adapt to the oily environment of the workshop.

Power Distribution in Commercial Complexes: Cables from the transformer room to the floor main distribution box in large shopping malls and hotels often use this cable. For example, the dedicated line of the air-conditioning room in a commercial center uses this cable, which can drive 4 15kW water chillers at the same time. Its flame retardant performance (UL94 V-0 grade) can effectively delay the spread of fire in case of short circuit accidents, buying time for personnel evacuation.

Main Incoming Line of High-rise Building: In high-rise buildings with more than 30 floors, the cable is led from the underground power distribution room to the roof main distribution box and laid through the shaft bridge. Its mechanical strength (tensile strength ≥12MPa) can bear the tension generated by its own weight, avoiding conductor breakage caused by long-term suspension.

Indoor Wiring in Residential Buildings: In the decoration of residential buildings, the cable is often used for socket circuits in living rooms and bedrooms, which can support the simultaneous operation of multiple devices such as refrigerators, TVs, and computers. When laid in pipes, its smooth insulation surface (friction coefficient ≤0.3) can reduce friction with PVC pipes, reducing the risk of damage to the insulation layer during construction.

Power Supply for Small Businesses: Lighting and socket circuits in convenience stores and offices mostly use this cable. For example, the dedicated line of the cash register in a chain convenience store is connected with this cable, which can support the simultaneous operation of cash registers, refrigerators, and microwave ovens, and its temperature resistance can adapt to the indoor temperature of 35°C in summer.

Power Supply for Outdoor Landscapes: Low-voltage lines of park street lamps and community landscape lamps often use this cable. When laid underground through galvanized steel pipes, the weather resistance of the insulation layer (after 1000 hours of xenon lamp aging test, the elongation at break retention rate is ≥80%) can resist ultraviolet rays and rain erosion.

Continuous casting and rolling of copper rod: Φ8mm copper rod is annealed at 800°C to reduce hardness (Vickers hardness HV ≤80);

Multi-head wire drawing: Drawing into 0.5mm fine copper wire through 12 wire drawing dies to ensure diameter deviation ≤±0.01mm;

Bunch stranding: 61 copper wires are stranded by a concentric bunch strander, and the direction of the outer copper wires is opposite to that of the inner layer to prevent loosening during laying.

The 120mm² conductor uses a φ120 extruder, and the insulation layer is extruded at one time, with the die head temperature of 190±5°C to ensure full plasticization of PVC;

The 10mm² conductor uses a φ65 extruder, and the insulation thickness deviation is controlled within ±0.05mm to avoid insulation breakdown caused by thin points;

A "micro-adhesion" process is adopted between the insulation layer and the conductor, with a peel strength of 0.8-1.2N/mm, which is convenient for stripping during terminal processing and prevents gaps between them.

3X1X120mm² cable: The three-core conductors are arranged in an equilateral triangle, the gap is filled with polypropylene rope (diameter 5mm), and the outer layer is wrapped with non-woven tape (thickness 0.1mm) for fixation to ensure the roundness of the cable (ellipticity ≤5%);

2X1X10mm² cable: The two cores are stranded in parallel with a pitch of 160mm, no filling is needed, and mica tape (temperature resistance 80°C) is directly wrapped to simplify the structure and improve flexibility.

Electrolytic copper must pass spectrum analysis, and the content of impurities (iron, nickel, etc.) ≤0.003%;

PVC particles are tested for melt index (1.8-2.2g/10min under 190°C/2.16kg conditions) and thermal aging performance (after 100°C×168 hours, tensile strength retention rate ≥85%);

The filling rope is tested for tensile strength (≥200MPa) and water absorption (≤0.5%).

Conductor Stranding: Servo motor is used to control tension (50N for 120mm² conductor, 15N for 10mm² conductor), and the pitch is monitored in real time. The machine stops automatically when the deviation exceeds ±2%;

Insulation Extrusion: Equipped with an online infrared thermometer to ensure that the temperature of the insulation layer after cooling is ≤40°C, avoiding cracking caused by internal stress;

Cabling Process: The triple-core cable uses a planetary cabling machine to ensure uniform stranding; the duplex cable uses a parallel stranding machine to control the stranding angle at 30° to reduce friction.

DC resistance: 120mm² ≤0.153Ω/km, 10mm² ≤1.83Ω/km (at 20°C);

Power frequency withstand voltage: Apply 3kV voltage for 5 minutes, no breakdown or flashover;

Insulation resistance: ≥100MΩ·km (500V megohmmeter);

Mechanical performance: Insulation layer tensile strength ≥12MPa, elongation at break ≥150%;

Flame retardant test: In the vertical burning test, the flame spread length ≤50mm, and the self-extinguishing time ≤30 seconds.

Cable Reel Specifications: 120mm² cables use galvanized steel reels with a diameter of 1600mm (load-bearing 2000kg), 10mm² cables use 800mm steel reels (load-bearing 500kg). The edge height of the steel reel is ≥200mm, and the diameter of the central shaft hole is 150mm, suitable for forklift loading and unloading.

Inner Packaging Details: The outer layer of the cable is wrapped with 3 layers of waterproof kraft paper (weight 100g/㎡), then covered with 0.15mm thick PE film (moisture permeability ≤3g/㎡·24h). Due to its heavy weight, the 120mm² cable is additionally fixed at 3 points with steel belts per reel (100m) to prevent loosening; the 10mm² cable is equipped with a plastic handle per reel (200m) for easy manual handling.

Identification Information: A weather-resistant label is attached to the side of the steel reel, indicating the model (such as "Nyy 3X1X120mm²"), length, production batch number, implementation standard, and icons such as "moisture-proof" and "up". The label is in both Chinese and English to ensure recognition by international customers.

Store in a well-ventilated and dry warehouse with an ambient temperature of -5°C to 30°C and a relative humidity of ≤60%;

The steel reel must be raised by 10cm (with a wooden pallet) to avoid ground moisture erosion;

Stacking height: no more than 2 layers for 120mm² cables, no more than 4 layers for 10mm² cables to prevent deformation of the bottom steel reel;

The storage period is 2 years. If it exceeds the period, the insulation resistance must be re-inspected (≥50MΩ·km can be used).

Road Transportation: Closed trucks are used within 300km. Anti-slip rubber pads are laid in the carriage. 120mm² cables are loaded and unloaded with forklifts, and each reel is fixed at 4 points; 10mm² cables need to be handled by two people manually to avoid wear of the insulation layer. During summer transportation, a sunshade is installed on the carriage to control the internal temperature ≤40°C.

Railway Transportation: Containers are used for long-distance transportation. A 20-foot container can hold 12 reels of 120mm² cables (100m/reel) or 50 reels of 10mm² cables (200m/reel). Silica gel desiccant (8kg per box) is placed in the box to prevent moisture.

Sea Transportation: The main transportation method, departing from Shanghai Port/Ningbo Port to global ports (such as Rotterdam, Dubai), with a voyage of 25-40 days. Cable reels are reinforced with pallets, moisture-proof membranes are laid in containers, and each reel is covered with a dust cover to resist salt spray.

Air Transportation: Air transportation is used for emergency orders. The weight of a single reel of 120mm² cable is ≤300kg, and that of 10mm² cable is ≤50kg. "Handle with care" signs are attached to the packaging, which conforms to IATA transportation standards.

Special spreaders (load-bearing ≥2t) are required for hoisting 120mm² cables, and the lifting points are located at the center of both sides of the steel reel to avoid tilting;

When manually handling 10mm² cables, dragging is prohibited, and the center of gravity (1/3 from both ends) must be lifted.

Integrity of packaging (no damage, water stains);

Consistency of label information with the order;

Length deviation (allowable ±0.5%);

Appearance quality (no scratches or bulges on the insulation layer, and the roundness of 120mm² cable is ≤5%).

Customers can apply for samples by email or phone. 1m long samples of 120mm² and 10mm² cables are provided (free of charge) and sent within 3 working days;

The sample is accompanied by a "Test Report", including key parameters such as conductor resistance and insulation thickness, which are consistent with bulk products.

Model Selection Consultation: Engineers recommend models according to scenarios (such as "industrial workshop", "residential wiring"), and provide current-carrying capacity correction tables and laying plans;

Installation Guidance: Provide a "Laying Manual", including bending radius requirements, fixed spacing (horizontal ≥1.5m, vertical ≥2m), and terminal processing methods;

Troubleshooting: 7×24-hour technical hotline responds to provide solutions for problems such as "overload heating" and "insulation aging".

Both cables provide a 24-month warranty (from the date of acceptance). During the warranty period, free replacement is provided for quality problems (such as insulation layer cracking and conductor oxidation);

Paid maintenance is provided for man-made damage (such as mechanical damage and overvoltage breakdown), and only the material cost is charged.

After receiving customer feedback, respond within 1 hour and provide a solution within 4 hours;

Arrange engineers to arrive at the site within 24 hours for domestic customers, and coordinate local service providers within 72 hours for international customers;

Conduct a return visit 3 months after maintenance to confirm that the problem is solved.

High Material Purity: Both use T2 grade electrolytic copper with a purity of 99.95%, ensuring low resistance and high conductivity, and reducing energy loss by 5-8% compared with ordinary Copper Cables.

Safety and Reliability: The insulation layer meets the flame retardant standard of UL94 V-0, and passes strict pressure resistance and insulation tests, effectively preventing short circuits and electric leakage accidents.

Strong Environmental Adaptability: It can work stably in the temperature range of -15℃ to 70℃, and the insulation layer is resistant to oil, moisture, and ultraviolet rays, adapting to various harsh environments.

Convenient Construction: The Multi-Core integrated design reduces the number of cables, simplifies the wiring process, and the flexible structure is easy to lay in narrow spaces.

Perfect Service System: From sample application to after-sales maintenance, a full-cycle service system is provided, with professional technical teams to solve various problems in the use process.