Zc-Yjv22, Zr-Yjv22, and Wdzn-Yjy22 are all high-quality armoured copper core cables, with copper conductors as the core, using XLPE (cross-linked polyethylene) as the insulation layer, combined with different protective structures (Sta steel tape armouring, PVC sheath or low-smoke halogen-free sheath). They are widely applicable to power transmission scenarios with high requirements for safety and weather resistance.​ The copper conductors of the three types of cables all have a purity of over 99.9% and a conductivity of ≥58MS/m, ensuring low transmission loss and adapting to medium and high-voltage power systems. After warm water cross-linking treatment, the insulation layer has a temperature resistance range extended to -40℃ to 90℃, with an insulation resistance of ≥1000MΩ·km and a breakdown field strength of ≥20kV/mm, which can resist the impact of harsh environments such as humidity and high temperature. The steel tape armouring layer (Sta) adopts a hot-dip galvanizing process, with a thickness of ≥0.3mm and a compressive strength of ≥200MPa, effectively improving the cable's resistance to mechanical impact and rolling, and is suitable for complex laying environments such as direct burial and pipe penetration.​ In terms of protective characteristics, the three types of cables have their own focuses: Zc-Yjv22 has flame-retardant properties, passing the GB/T 18380 bundle combustion test, with a flame spread length of ≤1.5m and no drips igniting filter paper, suitable for crowded places such as shopping malls and office buildings; Zr-Yjv22 enhances flame-retardant performance, with a flame-retardant grade of Class C, which can delay the spread of fire in the early stage of a fire and gain time for emergency power supply, mostly used in key facilities such as hospitals and data centers; Wdzn-Yjy22 uses a low-smoke halogen-free sheath, with a smoke density of ≤50% when burning and a halogen acid gas release of ≤0.5mg/g, complying with the GB/T 19666 standard, suitable for enclosed spaces such as subways and tunnels, reducing the risk of suffocation and corrosion during fires.​ Structurally, all three are multi-core designs (common specifications such as 4×120+1×70mm², 4×240+1×120mm², etc.), and the current-carrying capacity increases with the specification. The 4×240mm² model has a current-carrying capacity of 400-500A, meeting the power supply needs of large industrial equipment and urban power grid main lines. During laying, the steel tape armouring allows a minimum bending radius of 12 times the cable outer diameter, adapting to installation in narrow spaces.​ In practical applications, Zc-Yjv22 is often used in the distribution main lines of commercial complexes, Zr-Yjv22 ensures uninterrupted power supply in hospital ICU wards, and Wdzn-Yjy22 has become the main cable in subway tunnel sections. With their excellent conductivity, mechanical strength and protective properties, the three provide stable and reliable power transmission support for various high-demand scenarios.