H07RN-F Weather-resistant power cable for wind energy generation (tower‑type) 

Product Standard 

Enterprise Standard 

Scope of Application 

Power cables for wind power generation are suitable for free‑moving, freely suspended, or fixed installations. In freely suspended installation environments, the cables can rotate freely along with the wind turbine. 

This product is suitable for phase conductors connecting the stator of a wind turbine generator to the distribution cabinet, PE Cable; phase conductor from the wind turbine generator rotor to the distribution box; phase and grounding conductors from the wind turbine distribution cabinet to the transformer substation. 

Model Name 

Environmental conditions 

Altitude: 1000m

Ambient air temperature: Long-term average temperature: 10 °C 

             Extreme maximum temperature: 50 °C

             Extreme minimum temperature: -40 °C

Average relative humidity: Multi-year average: 80%

Seismic Resistance: Horizontal Acceleration: 0.2g

             Vertical acceleration: 0.1g

             Safety factor: 1.67

             Among them g For the acceleration due to gravity, its value is 9.8m /s ² 

Maximum wind speed: 30.0 m/s

Cable Laying Scope 

The cable is primarily installed either in the air or buried directly in soil containing water, acids, and salts. 

Usage characteristics 

Rated voltage U 0/U For 450/750V；

Long-term operating ambient temperature for cable use: -40 ~ 90 °C; 

The ambient temperature for cable installation shall not be lower than -15 °C; 

The minimum allowable bending radius of the cable shall not be less than the cable’s outer diameter multiplied by 6 Times. 

Product Introduction 

Conductor 

Conductors shall comply with IEC60228 The requirements stipulated for the fifth type of conductor. 

The conductor surface shall be smooth, free of oil and grease, and free of burrs that could damage the insulation, as well as any protrusions or broken strands. 

Isolation layer 

Each conductor is coated with an insulating layer made of a suitable material. 

Insulation 

The nominal value of the insulation thickness shall comply with DIN VDE 0250-4 According to the relevant provisions, the average insulation thickness shall not be less than the nominal value, and the minimum thickness at the thinnest point shall not be less than the nominal value of 90%-0.1mm 。

The insulation is made of ethylene–propylene rubber, and its performance complies with… DIN VDE 0207-20 middle EI4 Requirements for insulating materials. The insulation shall be tightly extruded over the conductor and shall be easily stripped without damaging the insulation, the conductor, or any plating. The surface of the insulation shall be smooth and uniformly colored. 

Insulated conductors shall be marked with color codes or numerical codes for identification and shall comply with… DIN VDE 0293 The provisions. 

Sheath 

The nominal value of the sheath thickness shall comply with DIN VDE 0250-4 of the specified requirements. Furthermore, the average thickness of the outer jacket shall not be less than the nominal value, and the minimum thickness at the thinnest point shall not be less than the nominal value of 85%-0.1mm 。

The sheath shall be made of chloroprene or a similar elastomeric material, and its performance shall comply with… DIN VDE 0207-21 middle EM2 Specification requirements. The jacket shall be tightly extruded over the stranded insulated cores or the covering layer, and the outer jacket surface of the cable shall be smooth and uniformly colored. 

The cable outer diameter shall comply with DIN VDE 0250-4 and Q/321023KLA130 The provisions.

Finished cable 

Finished cable 20 At ℃, the DC resistance of the conductor shall not exceed IEC60228 The provisions therein. 

Finished cables and insulated cores shall be capable of withstanding the specified AC rated voltage. 2500V Withstand voltage test, requirements: 5 No breakdown occurs within the minute. 

The mechanical and physical properties of the finished cable insulation comply with… DIN VDE 0282-4 The provisions. 

The mechanical and physical properties of the finished cable jacket comply with… DIN VDE 0282-4 The provisions. 

The finished cable shall be able to withstand -40 Low-temperature performance test as specified by the standard. 

The finished cable shall be able to pass IEC60332.1 or EN 5 0265-2-1 The specified combustion test. 

The finished cable shall be able to pass EN 6 0811-2-1 The specified oil resistance test. 

The finished cable shall be capable of withstanding four forward and four reverse twists per cycle, with a torsional angle of not less than +/-150 ° /m , with a frequency of no less than 3600 In the subsequent torsional‑resistance test, it is required that, upon completion of the cable test, the conductor remains intact and no cracks appear on the sheath surface. 

The main engineering and technical parameters of the finished cable are shown in the table below: 

Inspection Rules 

Products shall be inspected and approved by the technical inspection department before leaving the factory, and each shipment shall be accompanied by a certificate of product quality inspection. 

Products shall be in accordance with DIN VDE 0282-4 Conduct the prescribed type of inspection; if the first test result for a sampling inspection item is unsatisfactory, an additional sample shall be taken from the same batch of cables.  For a single specimen, tests are conducted on the nonconforming items; If all sampled units pass inspection, the batch of cables is deemed accepted; otherwise, the batch is rejected. The sample size for each batch shall be determined by mutual agreement; if the user does not specify, it shall be prescribed by the manufacturer. 

Labeling, packaging, transportation, and storage & transport 

Logo 

The outer surface of the cable shall bear continuous markings indicating the manufacturer, model, nominal cross-sectional area, voltage rating, and other relevant information; the marking method shall comply with… DIN VDE 0293-308 Requirements for color coding of cable conductors and flexible cords. 

The marking shall be legible and resistant to erasure; it may be gently wiped with a water‑soaked, degreased cotton cloth. 10 Next, the handwriting remains clearly legible. 

Packaging 

Cables may be packaged in drums or coils; drum‑packaged cables shall be properly secured in accordance with… JB/T8137 Delivery shall be made on the specified cable reel. The cable shall be securely sealed, and the cable end protruding from the reel shall be fitted with a protective cap; the length of the protrusion shall not exceed 300mm。

The outer side of the cable reel for bundled cables and the additional label on coiled cables shall indicate: 

① Manufacturer’s name or trademark; 

② Product model and specifications, mm ² ,V ；

③ Length, m ；

④ Manufacturing date:   year   month; 

⑤ This standard’s number; 

⑥ Indicates the correct rotation direction of the cable reel. 

Transportation and Storage 

Cables should be kept away from high-temperature environments, and cable reels must not be laid flat. 

During transportation, it is strictly prohibited to drop cable reels containing cables from height, and mechanical damage to the cables is also strictly forbidden. 

When lifting packaged units, it is strictly prohibited to lift multiple reels simultaneously. On vehicles, vessels, and other transport equipment, cable reels must be securely positioned and properly restrained to prevent collisions and overturning.