70 year high performance and long life wire and cable
High performance and long life radiation crosslinked halogen-free low smoke flame-retardant fire-resistant wires and cables adopt the internationally advanced electron accelerator physical radiation crosslinking technology, which ensures the mechanical and physical properties and electrical properties of the wires, and has high and low temperature, flame retardant, wear-resistant, oil resistant, and high physical and mechanical properties and electrical properties. This product is applicable to rated voltage 0.6/1kV and below power distribution networks or industrial devices can be used in densely populated places such as shopping malls, theaters, stations, airports, and important power distribution lines and building wiring.
Product implementation and reference standards: JG/T441-2014, JG/T442-2014, DB37/T 2183.1-2012 and other relevant standards.
Usage properties:
1. Rated voltage Uo/U: 300/500V, 450/750V, 0.6/1kV;
2. Long term allowable working temperature of cable conductor: 90 ℃, 105 ℃, 125 ℃;
3. In case of short circuit (the longest duration shall not exceed 5S), the temperature of cable conductor shall not exceed 250 ℃;
4. Cable laying temperature ≥ 0 ℃;
5. Minimum allowable bending radius of cable: single core cable: no armored 20D, armored 15D; Multi core cable: no armored 15D, armored 12D.
manufacture Charging post cable The main materials of TPE 、 TPU 、 PVC Elastomer XL-PE , EPDM, neoprene, etc. Today, there is a small series of Jiaotai cable PVC Elastomer as an example Of PVC elastomer.
Production of charging pile cable materials Flexalloy It is a kind of hardness 75ShoreA And can achieve CSA Specified in the standard -40 º C Low temperature impact test requirements. It has 8.2MPa Tensile strength, tensile ratio can reach 390% , and complies with UL-62 Oil resistance requirements. It has excellent wear resistance, elasticity and hardness even at very low temperatures, and is cost-effective and suitable for mass production. FlexalloyPVC The resistance and elasticity of the elastomer make it the standard PVC It is a high-performance substitute for compounds, but it is cheaper than high-grade materials such as thermoplastic polyurethane.
1、 Scope of application
WDZ series wires and cables for railway rolling stock use low smoke halogen-free flame-retardant cross-linked polyolefin insulation. The product is mainly suitable for power transmission of railway rolling stock with AC rated voltage of 3kV and below, and has excellent cold resistance, oil resistance, ultraviolet resistance, low smoke halogen-free, high flame retardancy and other characteristics.
2、 Use Properties
1. The rated voltages U0/U of wires and cables for WDZ series railway rolling stock are 500V, 750V, 1kV, 1.5kV and 3kV. The rated DC voltage is 1.5 times of the rated AC voltage.
2. The long-term allowable working temperature of WDZ series wires and cables for railway rolling stock is: WDZ-DCYJ-125, and 125 ℃ for WDZ-DCYJ/B-125 products; 150 ℃ for WDZ-DCYJ/B-150 products.
3. Minimum operating ambient temperature of cable: WDZ-DCYJ-125 product should not be lower than - 40 ℃; WDZ-DCYJ/B-125, WDZ-DCYJ/B-150 products should not be lower than - 60 ℃.
4. Allowable bending radius of wire and cable laying for WDZ series railway rolling stock:
Cable outer diameter（ D) It shall not be less than 3D when it is 20mm or less.
Cable outer diameter（ D) It shall not be less than 5D when it is more than 20mm.
5. WDZ-DCYJ-125 cable can be used in oil polluted environment; WDZ-DCYJ/B-125 and WDZ-DCYJ/B-150 cables are allowed to be used in harsh environments with various grease pollution and non high concentration acid and alkali pollution.
Wind power cable Of Features and product categories
one Operating environment characteristics:
Long term operation outdoors, vertical suspended laying, frequent torsion (automatic yaw against wind), contact with oil (part), seawater corrosion (special environment).
two Requirements for cables:
High mechanical strength, torsion resistance (soft), vibration resistance, oil resistance and other requirements. In addition, cables used in cold regions should also be resistant to low temperature（ -40℃）。
three Cable structure and materials
Considering the above characteristics, wind power cables are basically rubber cables (at least used in the fan and the first tower barrel above), Class 5 or 6 conductor, EPR or silicone rubber insulation, neoprene, CPE or TPU sheath
four Application occasions of cables
Inside the engine room, between the engine room and the upper part of the tower, between the lower part of the tower and the box transformer at the bottom of the tower.
five Type of cable
Used in the engine room: flexible wire, control cable, data cable, drag cable (used to form a loop for the rotor), etc.
Inside the tower: Wiring (Lighting) power cable (fixed laying and twisting)
six Number of wind power cables used in wind turbines
With one For example, for a 1.25MW fan (in the tower and engine room), the tower height is generally about 90m, so only the number of cables required is about 1km according to the length. If a wind field of 50000 kW is used for calculation, 40 km cable is required.
