1、 Characteristics of operation environment: long term outdoor operation, vertical suspended laying, frequent torsion (automatic yaw to wind), oil pollution (part), seawater corrosion (special environment)
2、 Requirements for cables: high mechanical strength, torsion resistance (softness), vibration resistance and oil resistance. In addition, cables used in cold regions should also be resistant to low temperature (- 40 ℃, - 55 ℃)
3、 Cable structure and materials: combined with the above characteristics, wind power cables are basically rubber cables (at least for the cables used in the fan and the upper first tower drum), category 5 or 6 conductors, EPR or silicone rubber insulation, chloroprene rubber, CPE or TPU sheath
4、 Special performance test (according to environmental requirements): -- low temperature resistance (- 40 ℃ or - 50 ℃) - seawater resistance (NaCl: MgCl2 is 7:1, concentration is 30g / L, pH range is 7.0-8.0, 40 ℃, 14d) - weatherability and ultraviolet resistance of sheath GB 12527 -- torsion resistance
5、 Characteristics of cable:
1. It has good low temperature resistance, wear resistance, fatigue resistance, weather aging resistance, microbial resistance, and good corrosion resistance to oil and chemicals. Ordinary cable does not have wear resistance and corrosion resistance
2. Excellent torsion resistance and bending performance: the finished cable can withstand the torsion resistance test with positive and negative four turns for one time and the torsion angle of 1080 ° for no less than 10000 times under the low temperature environment of - 25 ℃, - 40 ℃ or - 55 ℃. After the test, the conductor shall not break and the sheath surface shall not crack. Ordinary cables are not suitable for torsion at low temperature
3. The applicable ambient temperature is - 45 ℃～ + 110 ℃, and the operating temperature is - 55 ℃～ + 110 ℃
4. The laying temperature of the cable shall not be lower than - 30 ℃
5. Cable bending radius: fixed installation shall not be less than 4 times of cable outer diameter, mobile installation shall not be less than 5 times of cable outer diameter. The bending radius of ordinary cable is 20 times of the outer diameter of cable
