This article focuses on the manufacturers of steel wire armoured (Swa) cables of models such as 3X35mm² Yjv32, Yjy32, Wdzn - Yjy32, and Zr - Yjv32. Yjv32 represents a copper - core cross - linked polyethylene insulated fine steel wire armoured polyvinyl chloride sheathed power cable. Yjy32 is a copper - core cross - linked polyethylene insulated fine steel wire armoured polyethylene sheathed power cable. Wdzn - Yjy32 is a copper - core cross - linked polyethylene insulated fine steel wire armoured polyethylene sheathed low - smoke, halogen - free, flame - retardant and fire - resistant power cable. Zr - Yjv32 is a copper - core cross - linked polyethylene insulated fine steel wire armoured polyvinyl chloride sheathed power cable with flame - retardant properties.​ These cables are suitable for AC 50HZ power transmission and distribution lines with a rated voltage of 35KV and below, and are used for transmitting electric energy. The allowable long - term operating temperature of the conductor is 90℃, and the temperature does not exceed 250℃ during short - circuit (with a maximum duration of not more than 5s). The ambient temperature during laying should not be lower than 0℃. Due to the fine steel wire armoured structure, they can withstand mechanical external forces and considerable tensile forces, and are suitable for high - drop areas. At the same time, some models such as Wdzn - Yjy32 have low - smoke, halogen - free, flame - retardant and fire - resistant properties, and Zr - Yjv32 has flame - retardant properties, which can meet the safety requirements of different scenarios.​ Manufacturers usually produce according to relevant standards such as GB/T12706. The products are widely used in urban power grids, mines, factories, fire - fighting systems, emergency power supply lines and other places, ensuring the stable transmission of electric power in various complex environments. When choosing cables, users need to rationally select appropriate models according to the specific laying environment, load, and requirements for cable characteristics (such as flame - retardant grade, whether low - smoke and halogen - free are required, etc.) to ensure the safe and reliable operation of the power system.

This cable is a 3-core Steel Wire Armoured (SWA) cable with a specification of 3X240mm². The conductor is available in copper or aluminum, offering high conductivity and lightweight advantages respectively. The copper conductor has a copper content of over 99.9%, with excellent conductivity, suitable for high-power transmission scenarios; the aluminum conductor weighs only 1/3 of the same specification copper conductor, with lower installation costs, suitable for medium and low-load circuits.​ The insulation layer adopts a composite structure of cross-linked polyethylene (XLPE) and polyvinyl chloride (PVC): XLPE has a temperature resistance range of -40℃ to 90℃ and an insulation resistance of ≥1000MΩ, which can resist high-voltage impact and temperature fluctuations; the outer PVC sheath has a tensile strength of ≥12MPa, wear-resistant and corrosion-resistant, and can adapt to complex environments such as humidity and dust. The steel wire armouring layer is made of high-carbon steel with an armouring density of ≥90%, which has excellent mechanical protection capabilities, can withstand external extrusion and stretching, and is suitable for harsh laying methods such as direct burial and pipe 穿.​ The cable has a rated current-carrying capacity of 420A (copper conductor)/320A (aluminum conductor) and a rated voltage of 10kV. It is widely used in industrial plant power distribution, main lines of high-rise buildings, outdoor overhead and underground transmission projects, providing stable and reliable guarantee for high-power equipment and long-distance power transmission.