Product use: used for power transmission and distribution lines with a rated voltage of 35kV and below. It can be directly buried underground, in tunnels or pipelines, and used in humid environments, rivers and places with high groundwater levels. Product representation method: According to the representation method of cross-linked polyethylene insulated cables specified by the national standard, plus the additional characteristic representation method of this product ZSA or ZSB. The characteristic expression method is generally added before the cable model. ZSA means that the cable conductor and insulation filling are all designed with water blocking. The conductor and cable core have longitudinal water-blocking properties, and the cable has radial water-blocking properties. ZSB indicates that the conductor of the cable has no water-blocking structure, other cable cores have longitudinal water-blocking properties, and the cable has radial water-blocking properties.   The rated voltage of the cable is 35kV and below. Maximum rated working temperature of cable conductor: PVC insulation 70℃, XLPE insulation 90℃. When short circuit (the longest duration does not exceed 5 seconds), the maximum temperature of cable conductor does not exceed 160℃ for PVC insulation and 250℃ for XLPE insulation. Cable laying temperature is not Below 0°C, the minimum bending radius when laying the cable should meet the requirements of GB12706. Fully water-blocking cables (ZSA) can be used in areas with a lot of water such as rivers, and ZSB-class cables can be used in wet and rainy areas.