Yjvr, Zryjv, and Vvr are all copper core power cables, covering various cross-sectional area specifications such as 16mm², 25mm², 35mm², 50mm², and 70mm², suitable for different power transmission scenarios.​ Yjvr cable adopts cross-linked polyethylene (XLPE) insulation and polyvinyl chloride (PVC) sheath, with excellent electrical and mechanical properties, good temperature resistance, a long-term working temperature of up to 90℃, and good flexibility, suitable for occasions requiring bending laying. Zryjv is a flame-retardant cross-linked polyethylene insulated power cable. In addition to the basic properties of Yjvr, it also has excellent flame-retardant characteristics. In case of fire, it can delay the spread of fire and ensure the stable operation of the power system in a short time, suitable for places with high fire protection requirements such as high-rise buildings and shopping malls. Vvr cable is a polyvinyl chloride insulated and sheathed flexible cable. The conductor is stranded with multiple strands of copper wire, with high flexibility and convenient installation, suitable for mobile equipment connection, temporary power supply lines and other scenarios.​ The different specifications of these three types of cables can meet different current-carrying capacity requirements. The cross-sectional area from 16mm² to 70mm² covers the common range of medium and low voltage power transmission, and is widely used in industrial power distribution, building electrical, municipal engineering and other fields, providing safe and stable power transmission support for various power systems.