Vvg, Pvvg, Avvg, and Apvvg series power cables are low-voltage and medium-low voltage transmission cables suitable for voltage levels of 0.66kV, 1kV, and 3kV. They are widely used in power transmission and distribution systems in industrial, construction, energy, and other fields. All four types of cables use copper or aluminum as the conductor core and polyvinyl chloride (PVC) as the insulation and sheath material. Some models are equipped with steel tape or steel wire armoring structures, featuring excellent electrical performance, mechanical strength, and environmental adaptability, which can meet the safe power transmission requirements in different scenarios.​ In terms of conductor materials, Vvg and Pvvg adopt high-purity copper conductors (purity ≥99.9%). The excellent conductivity of copper can reduce transmission losses and ensure efficient current transmission, making them suitable for occasions with high requirements for conductive efficiency. Avvg and Apvvg use high-purity aluminum conductors (purity ≥99.5%). Aluminum conductors are lighter, lower in cost, and have good corrosion resistance, making them suitable for long-distance laying or scenarios with high lightweight requirements. The conductor structure is a multi-strand stranded design, which enhances the flexibility of the cable, facilitating bending and installation, especially in narrow spaces or complex wiring environments.​ In terms of insulation and sheath, all four types of cables uniformly use PVC materials. The PVC insulation layer has high insulation resistance (≥10¹⁴Ω·m), which can effectively isolate the conductor from the outside world and prevent electric leakage or short circuits. Its long-term working temperature is 70℃, and it can withstand a high temperature of 160℃ in case of short circuits (maximum 5 seconds), meeting the temperature resistance requirements under conventional working conditions. The outer PVC sheath has excellent mechanical protection capabilities, with a tensile strength of ≥12MPa and an elongation at break of ≥150%, which can resist extrusion, friction, and acid-alkali erosion, extending the service life of the cable.​ The differences between models are mainly reflected in the structural design: Vvg is a non-armored cable with copper conductor, PVC insulation, and PVC sheath; Pvvg adds a steel tape armoring layer on the basis of Vvg, which improves the resistance to mechanical damage and is suitable for direct burial or environments vulnerable to external impact; Avvg replaces the copper conductor with an aluminum conductor and maintains a non-armored structure, balancing performance and cost; Apvvg is a combination of aluminum conductor and steel tape armoring, which has both lightweight and high protection, suitable for scenarios with high cost performance and requiring armoring protection. In addition, some models can choose steel wire armoring according to requirements to further enhance tensile strength, adapting to vertical laying or high-tension environments.​ In terms of performance parameters, all four types of cables comply with national standards such as GB/T 12706, with rated voltages covering 0.66kV, 1kV, and 3kV, meeting the different needs from low-voltage power distribution to medium-low voltage power transmission. The current-carrying capacity varies according to the conductor cross-section (ranging from 1.5mm² to 240mm²) and laying method. For example, a 10mm² copper conductor cable has a current-carrying capacity of approximately 55A when laid in air, and an aluminum conductor has a current-carrying capacity of approximately 45A, which can match electrical equipment of different powers. The bending performance is excellent, with a minimum bending radius of 6-12 times the outer diameter of the cable, facilitating wiring construction in complex environments.​ In terms of application scenarios, non-armored Vvg and Avvg are often used for indoor open laying, bridge laying, or pipe threading in buildings, such as power distribution trunks in office buildings and shopping malls; armored Pvvg and Apvvg are suitable for underground direct burial, tunnel laying, or outdoor open environments, such as factory area power transmission, urban power grid branches, and new energy power station connecting lines. Aluminum conductor models can reduce line weight and cost in long-distance power transmission, while copper conductor models have more advantages in scenarios with high load and high stability requirements (such as power supply for precision instruments).​ In summary, through the differentiated design of conductor materials and structures, the Vvg, Pvvg, Avvg, and Apvvg series cables form a product matrix covering different voltage levels, installation environments, and cost requirements. With reliable performance, flexible installation characteristics, and economic cost, they have become indispensable power transmission solutions in industrial and civil power systems.