Wind Turbine Cable: Medium Voltage XLPE Power Cable Guide | Anhui Feichun<\/title>\n \n \n <link rel=\"preconnect\" href=\"https:\/\/fonts.googleapis.com\">\n <link rel=\"preconnect\" href=\"https:\/\/fonts.gstatic.com\" crossorigin>\n <link href=\"https:\/\/fonts.googleapis.com\/css2?family=Orbitron:wght@400;600;700;900&family=Rajdhani:wght@300;400;500;600;700&family=Share+Tech+Mono&display=swap\" rel=\"stylesheet\">\n \n <style>\n :root {\n \/* Dark Industrial Color Palette *\/\n --bg-primary: #0a0e1a;\n --bg-secondary: #111827;\n --bg-tertiary: #1a2332;\n --accent-electric: #00d9ff;\n --accent-energy: #00ff88;\n --accent-warning: #ffd700;\n --text-primary: #e5e7eb;\n --text-secondary: #9ca3af;\n --text-dim: #6b7280;\n --border-color: #1e3a52;\n --table-header: #0d1b2a;\n --table-row-alt: #151f2e;\n --glow-blue: rgba(0, 217, 255, 0.3);\n --glow-green: rgba(0, 255, 136, 0.2);\n }\n \n * {\n margin: 0;\n padding: 0;\n box-sizing: border-box;\n }\n \n body {\n font-family: 'Rajdhani', 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border: 1px solid var(--accent-electric);\n box-shadow: 0 4px 15px rgba(0, 217, 255, 0.1);\n }\n \n .contact-card h4 {\n font-family: 'Orbitron', sans-serif;\n color: var(--accent-electric);\n margin-bottom: 1rem;\n font-size: 1.2rem;\n }\n \n .contact-info {\n display: flex;\n align-items: center;\n margin: 0.8rem 0;\n color: var(--text-secondary);\n }\n \n .contact-info a {\n color: var(--accent-energy);\n text-decoration: none;\n transition: all 0.2s ease;\n }\n \n .contact-info a:hover {\n color: var(--accent-electric);\n text-shadow: 0 0 10px var(--glow-blue);\n }\n \n \/* Footer *\/\n footer {\n background: var(--bg-secondary);\n border-top: 2px solid var(--accent-electric);\n padding: 2rem;\n text-align: center;\n margin-top: 4rem;\n }\n \n footer p {\n color: var(--text-dim);\n font-size: 0.9rem;\n }\n \n \/* Responsive Design *\/\n @media (max-width: 768px) {\n h1 {\n font-size: 2rem;\n }\n \n .container {\n padding: 2rem 1rem;\n }\n \n section {\n padding: 1.5rem;\n }\n \n .table-container {\n font-size: 0.8rem;\n }\n }\n \n \/* Smooth Scrolling *\/\n html {\n scroll-behavior: smooth;\n }\n \n \/* Loading Animation for tables *\/\n @keyframes fadeIn {\n from { opacity: 0; transform: translateY(20px); }\n to { opacity: 1; transform: translateY(0); }\n }\n \n section {\n animation: fadeIn 0.6s ease-out;\n }\n <\/style>\n<\/head>\n<body>\n <header>\n <div class=\"container\">\n <div class=\"company-logo\">Anhui Feichun Special Cable Co., Ltd. | \u5b89\u5fbd\u98de\u7eaf\u7279\u79cd\u7535\u7f06\u6709\u9650\u516c\u53f8<\/div>\n <h1>Wind Turbine Cable Technology<\/h1>\n <div class=\"cable-designation\">\n MEDIUM VOLTAGE XLPE POWER CABLE<br>\n 8.7\/15 (17.5) kV\n <\/div>\n <div class=\"standards-line\">\n <span class=\"standard-badge\">YHAKXS acc. to HD 620 S3:2023 Part 10 Section R<\/span>\n <span class=\"standard-badge\">A2XSY acc. to IEC 60502-2:2014<\/span>\n <span class=\"standard-badge\">A2XSY acc. to BS 7870-4.10:2011<\/span>\n <span class=\"standard-badge\">NA2XSY acc. to DIN VDE 0276-620:2018<\/span>\n <\/div>\n <\/div>\n <\/header>\n\n <div class=\"container\">\n \n <section>\n <h2>Understanding Wind Turbine Cable Systems<\/h2>\n <p>Wind turbine cables represent a critical component in renewable energy infrastructure, serving as the vital link between mechanical energy generation and electrical power distribution. These specialized medium voltage cables are engineered to withstand the unique environmental challenges present in wind energy applications, including constant mechanical stress, temperature variations, and exposure to harsh weather conditions.<\/p>\n \n <p>The cables discussed in this technical overview conform to multiple international standards, including the harmonized European standard HD 620 S3:2023, the International Electrotechnical Commission standard IEC 60502-2:2014, British Standard BS 7870-4.10:2011, and German standard DIN VDE 0276-620:2018. This multi-standard compliance ensures broad compatibility and adherence to stringent safety requirements across different jurisdictions and applications.<\/p>\n \n <div class=\"citation\">\n <strong>Source:<\/strong> International Electrotechnical Commission (IEC). (2014). <em>IEC 60502-2:2014 – Power cables with extruded insulation and their accessories for rated voltages from 6 kV to 30 kV<\/em>. Retrieved from <a href=\"https:\/\/webstore.iec.ch\" rel=\"nofollow noopener\" target=\"_blank\" style=\"color: var(--accent-electric);\">IEC Webstore<\/a>\n <\/div>\n <\/section>\n\n \n <section>\n <h2>Wind Turbine Architecture<\/h2>\n <p>Modern wind turbines are sophisticated electromechanical systems consisting of multiple integrated components working in harmony to convert kinetic wind energy into electrical power. Understanding these components provides essential context for appreciating the critical role of specialized cabling systems.<\/p>\n \n <div class=\"turbine-components\">\n <div class=\"component-card\">\n <h4>Rotor Blades<\/h4>\n <p>Aerodynamic structures that capture wind energy and convert it into rotational motion through carefully engineered airfoil profiles.<\/p>\n <\/div>\n <div class=\"component-card\">\n <h4>Pitch Control Unit<\/h4>\n <p>Adjusts blade angles dynamically to control rotation speed and optimize power output across varying wind conditions.<\/p>\n <\/div>\n <div class=\"component-card\">\n <h4>Hub<\/h4>\n <p>Central connection point where rotor blades attach, transmitting captured rotational energy to the drive train.<\/p>\n <\/div>\n <div class=\"component-card\">\n <h4>Brake System<\/h4>\n <p>Safety mechanism enabling emergency shutdown and controlled stopping during maintenance procedures or adverse conditions.<\/p>\n <\/div>\n <div class=\"component-card\">\n <h4>Gearbox Transmission<\/h4>\n <p>Increases low-speed shaft rotation to high-speed operation necessary for efficient generator performance.<\/p>\n <\/div>\n <div class=\"component-card\">\n <h4>Climate Sensors & Aviation Light<\/h4>\n <p>Environmental monitoring systems and FAA-compliant lighting ensuring operational safety and aircraft collision avoidance.<\/p>\n <\/div>\n <div class=\"component-card\">\n <h4>Nacelle<\/h4>\n <p>Weatherproof housing containing generator, gearbox, and control systems, protecting critical electrical components.<\/p>\n <\/div>\n <div class=\"component-card\">\n <h4>Generator<\/h4>\n <p>Converts mechanical rotational energy from the drive train into three-phase alternating current electrical energy.<\/p>\n <\/div>\n <div class=\"component-card\">\n <h4>Yaw Drive<\/h4>\n <p>Rotates the nacelle assembly to maintain optimal alignment with prevailing wind direction for maximum energy capture.<\/p>\n <\/div>\n <div class=\"component-card\">\n <h4>Cable System<\/h4>\n <p>Transfers generated electrical power from nacelle-mounted generator down through tower structure to ground-level distribution equipment.<\/p>\n <\/div>\n <div class=\"component-card\">\n <h4>Access System<\/h4>\n <p>Internal ladder or elevator system providing maintenance personnel safe access to nacelle and rotor hub components.<\/p>\n <\/div>\n <div class=\"component-card\">\n <h4>Tower Structure<\/h4>\n <p>Structural support elevating rotor assembly to optimal height for accessing consistent, high-velocity wind resources.<\/p>\n <\/div>\n <div class=\"component-card\">\n <h4>Foundation<\/h4>\n <p>Engineered concrete base anchoring tower securely to ground, ensuring structural stability under dynamic loading conditions.<\/p>\n <\/div>\n <div class=\"component-card\">\n <h4>Transformer Station<\/h4>\n <p>Converts generator output to transmission-suitable voltage levels for integration with electrical power grid infrastructure.<\/p>\n <\/div>\n <\/div>\n \n <div class=\"citation\">\n <strong>Source:<\/strong> European Wind Energy Association. (2009). <em>Wind Energy – The Facts: A guide to the technology, economics and future of wind power<\/em>. Earthscan Publications. Retrieved from <a href=\"https:\/\/www.wind-energy-the-facts.org\" rel=\"nofollow noopener\" target=\"_blank\" style=\"color: var(--accent-electric);\">Wind Energy Facts<\/a>\n <\/div>\n <\/section>\n\n \n <section>\n <h2>Technical Cable Specifications<\/h2>\n \n <h3>Conductor Configuration<\/h3>\n <p>The cables feature circular stranded and compacted copper conductors manufactured to Class 2 specifications, ensuring optimal current-carrying capacity and mechanical flexibility. The compacted construction (RMC designation) reduces overall cable diameter while maintaining equivalent electrical performance compared to non-compacted designs, resulting in improved space utilization within cable ducts and reduced installation costs.<\/p>\n \n <div class=\"spec-grid\">\n <div class=\"spec-item\">\n <div class=\"spec-label\">Conductor Material<\/div>\n <div class=\"spec-value\">Copper (Cu)<\/div>\n <\/div>\n <div class=\"spec-item\">\n <div class=\"spec-label\">Conductor Class<\/div>\n <div class=\"spec-value\">Class 2 (Stranded)<\/div>\n <\/div>\n <div class=\"spec-item\">\n <div class=\"spec-label\">Voltage Rating<\/div>\n <div class=\"spec-value\">8.7\/15 (17.5) kV<\/div>\n <\/div>\n <div class=\"spec-item\">\n <div class=\"spec-label\">Insulation Material<\/div>\n <div class=\"spec-value\">XLPE (Cross-Linked Polyethylene)<\/div>\n <\/div>\n <div class=\"spec-item\">\n <div class=\"spec-label\">Operating Temperature<\/div>\n <div class=\"spec-value\">90\u00b0C Continuous<\/div>\n <\/div>\n <div class=\"spec-item\">\n <div class=\"spec-label\">Installation Environment<\/div>\n <div class=\"spec-value\">Underground \/ Aerial<\/div>\n <\/div>\n <\/div>\n \n <h3>Operating Conditions<\/h3>\n <p>These cables are designed for installation in both underground and aerial configurations. For underground installations, the recommended burial depth is 0.7 meters with ground temperature assumed at 20\u00b0C and soil thermal resistivity of 1.0 K\u00b7m\/W. Aerial installations require protection from direct solar radiation with ambient temperature considerations at 25\u00b0C. These standardized conditions align with IEC 60287 series standards for current rating calculations.<\/p>\n \n <div class=\"citation\">\n <strong>Source:<\/strong> International Electrotechnical Commission (IEC). (2014). <em>IEC 60287 series – Electric cables – Calculation of the current rating<\/em>. Retrieved from <a href=\"https:\/\/webstore.iec.ch\" rel=\"nofollow noopener\" target=\"_blank\" style=\"color: var(--accent-electric);\">IEC Webstore<\/a>\n <\/div>\n <\/section>\n\n \n <section>\n <h2>Physical & Mechanical Characteristics<\/h2>\n <p>The following table presents comprehensive dimensional and mechanical data for the complete cable range, from 35 mm\u00b2 to 1000 mm\u00b2 conductor cross-sections. These parameters are critical for proper cable selection, installation planning, and mechanical load calculations.<\/p>\n \n <div class=\"table-container\">\n <table>\n <thead>\n <tr>\n <th>Conductor Size<\/th>\n <th>Conductor \u00d8<\/th>\n <th>Insulation Thickness<\/th>\n <th>\u00d8 Over Insulation<\/th>\n <th>Screen Area<\/th>\n <th>Cable \u00d8 (De)<\/th>\n <th>Cable Weight<\/th>\n <th>Max Pulling Force<\/th>\n <th>Min Bend Radius<\/th>\n <\/tr>\n <\/thead>\n <tbody>\n <tr>\n <td>1×35 RMC<\/td>\n <td>7.0 mm<\/td>\n <td>4.5 mm<\/td>\n <td>17.2 mm<\/td>\n <td>16 mm\u00b2<\/td>\n <td>25.9 mm<\/td>\n <td>920 kg\/km<\/td>\n <td>1.75 kN<\/td>\n <td>0.39 m<\/td>\n <\/tr>\n <tr>\n <td>1×50 RMC<\/td>\n <td>8.25 mm<\/td>\n <td>4.5 mm<\/td>\n <td>18.5 mm<\/td>\n <td>16 mm\u00b2<\/td>\n <td>27.1 mm<\/td>\n <td>1060 kg\/km<\/td>\n <td>2.5 kN<\/td>\n <td>0.41 m<\/td>\n <\/tr>\n <tr>\n <td>1×70 RMC<\/td>\n <td>9.6 mm<\/td>\n <td>4.5 mm<\/td>\n <td>19.8 mm<\/td>\n <td>25 mm\u00b2<\/td>\n <td>28.5 mm<\/td>\n <td>1370 kg\/km<\/td>\n <td>3.5 kN<\/td>\n <td>0.43 m<\/td>\n <\/tr>\n <tr>\n <td>1×95 RMC<\/td>\n <td>11.5 mm<\/td>\n <td>4.5 mm<\/td>\n <td>21.7 mm<\/td>\n <td>35 mm\u00b2<\/td>\n <td>30.4 mm<\/td>\n <td>1740 kg\/km<\/td>\n <td>4.75 kN<\/td>\n <td>0.46 m<\/td>\n <\/tr>\n <tr>\n <td>1×120 RMC<\/td>\n <td>12.9 mm<\/td>\n <td>4.5 mm<\/td>\n <td>23.1 mm<\/td>\n <td>50 mm\u00b2<\/td>\n <td>31.8 mm<\/td>\n <td>2140 kg\/km<\/td>\n <td>6 kN<\/td>\n <td>0.48 m<\/td>\n <\/tr>\n <tr>\n <td>1×150 RMC<\/td>\n <td>14.5 mm<\/td>\n <td>4.5 mm<\/td>\n <td>24.7 mm<\/td>\n <td>50 mm\u00b2<\/td>\n <td>33.4 mm<\/td>\n <td>2430 kg\/km<\/td>\n <td>7.5 kN<\/td>\n <td>0.50 m<\/td>\n <\/tr>\n <tr>\n <td>1×185 RMC<\/td>\n <td>16.0 mm<\/td>\n <td>4.5 mm<\/td>\n <td>26.2 mm<\/td>\n <td>50 mm\u00b2<\/td>\n <td>34.9 mm<\/td>\n <td>2790 kg\/km<\/td>\n <td>9.25 kN<\/td>\n <td>0.52 m<\/td>\n <\/tr>\n <tr>\n <td>1×240 RMC<\/td>\n <td>18.5 mm<\/td>\n <td>4.5 mm<\/td>\n <td>28.7 mm<\/td>\n <td>50 mm\u00b2<\/td>\n <td>37.4 mm<\/td>\n <td>3350 kg\/km<\/td>\n <td>12 kN<\/td>\n <td>0.56 m<\/td>\n <\/tr>\n <tr>\n <td>1×300 RMC<\/td>\n <td>20.5 mm<\/td>\n <td>4.5 mm<\/td>\n <td>30.7 mm<\/td>\n <td>50 mm\u00b2<\/td>\n <td>39.4 mm<\/td>\n <td>3940 kg\/km<\/td>\n <td>15 kN<\/td>\n <td>0.59 m<\/td>\n <\/tr>\n <tr>\n <td>1×400 RMC<\/td>\n <td>23.5 mm<\/td>\n <td>4.5 mm<\/td>\n <td>33.7 mm<\/td>\n <td>50 mm\u00b2<\/td>\n <td>42.4 mm<\/td>\n <td>4810 kg\/km<\/td>\n <td>20 kN<\/td>\n <td>0.64 m<\/td>\n <\/tr>\n <tr>\n <td>1×500 RMC<\/td>\n <td>26.5 mm<\/td>\n <td>4.5 mm<\/td>\n <td>37.2 mm<\/td>\n <td>50 mm\u00b2<\/td>\n <td>46.1 mm<\/td>\n <td>5920 kg\/km<\/td>\n <td>25 kN<\/td>\n <td>0.69 m<\/td>\n <\/tr>\n <tr>\n <td>1×630 RMC<\/td>\n <td>30.3 mm<\/td>\n <td>4.5 mm<\/td>\n <td>41.3 mm<\/td>\n <td>50 mm\u00b2<\/td>\n <td>50.3 mm<\/td>\n <td>7290 kg\/km<\/td>\n <td>31.5 kN<\/td>\n <td>0.75 m<\/td>\n <\/tr>\n <tr>\n <td>1×800 RMC<\/td>\n <td>34.6 mm<\/td>\n <td>4.5 mm<\/td>\n <td>46.0 mm<\/td>\n <td>50 mm\u00b2<\/td>\n <td>55.4 mm<\/td>\n <td>9010 kg\/km<\/td>\n <td>40 kN<\/td>\n <td>0.83 m<\/td>\n <\/tr>\n <tr>\n <td>1×1000 RMC<\/td>\n <td>38.2 mm<\/td>\n <td>4.5 mm<\/td>\n <td>49.6 mm<\/td>\n <td>50 mm\u00b2<\/td>\n <td>59.2 mm<\/td>\n <td>10930 kg\/km<\/td>\n <td>50 kN<\/td>\n <td>0.89 m<\/td>\n <\/tr>\n <\/tbody>\n <\/table>\n <\/div>\n \n <p>Note: RMC (Circular Stranded Compacted Conductor, Class 2) configuration provides optimal balance between flexibility and current-carrying capacity. The minimum bending radius values are specified for installation conditions and must be strictly observed to prevent insulation damage.<\/p>\n <\/section>\n\n \n <section>\n <h2>Electrical Performance Data<\/h2>\n <p>Accurate electrical parameters are essential for power system design, protection coordination, and thermal analysis. The data presented reflects standardized test conditions with conductor resistance measured at 20\u00b0C (DC) and 90\u00b0C (AC), representing ambient and operating temperatures respectively. Metallic screen resistance is measured at 20\u00b0C (DC) and 80\u00b0C (AC).<\/p>\n \n <div class=\"table-container\">\n <table>\n <thead>\n <tr>\n <th>Size<\/th>\n <th>R<sub>DC 20\u00b0C<\/sub><br>(\u03a9\/km)<\/th>\n <th>R<sub>AC 90\u00b0C<\/sub><br>(\u03a9\/km)<\/th>\n <th>Screen R<br>(\u03a9\/km)<\/th>\n <th>Field Stress<br>(kV\/mm)<\/th>\n <th>R<sub>0<\/sub><br>(\u03a9\/km)<\/th>\n <th>X<sub>0<\/sub><br>(\u03a9\/km)<\/th>\n <th>Capacitance<br>(\u00b5F\/km)<\/th>\n <th>X<sub>C<\/sub><br>(\u03a9\/km)<\/th>\n <th>I<sub>C<\/sub><br>(A\/km)<\/th>\n <\/tr>\n <\/thead>\n <tbody>\n <tr>\n <td>1×35\/16<\/td>\n <td>0.524<\/td>\n <td>0.668<\/td>\n <td>1.12\/1.38<\/td>\n <td>2.84\/1.32<\/td>\n <td>2.05<\/td>\n <td>0.082<\/td>\n <td>0.17<\/td>\n <td>19.1<\/td>\n <td>0.46<\/td>\n <\/tr>\n <tr>\n <td>1×50\/16<\/td>\n <td>0.387<\/td>\n <td>0.494<\/td>\n <td>1.12\/1.38<\/td>\n <td>2.72\/1.37<\/td>\n <td>1.88<\/td>\n <td>0.075<\/td>\n <td>0.19<\/td>\n <td>17.2<\/td>\n <td>0.51<\/td>\n <\/tr>\n <tr>\n <td>1×70\/25<\/td>\n <td>0.268<\/td>\n <td>0.342<\/td>\n <td>0.72\/0.89<\/td>\n <td>2.63\/1.41<\/td>\n <td>1.23<\/td>\n <td>0.070<\/td>\n <td>0.20<\/td>\n <td>15.6<\/td>\n <td>0.56<\/td>\n <\/tr>\n <tr>\n <td>1×95\/35<\/td>\n <td>0.193<\/td>\n <td>0.247<\/td>\n <td>0.51\/0.63<\/td>\n <td>2.52\/1.45<\/td>\n <td>0.88<\/td>\n <td>0.063<\/td>\n <td>0.23<\/td>\n <td>13.7<\/td>\n <td>0.63<\/td>\n <\/tr>\n <tr>\n <td>1×120\/50<\/td>\n <td>0.153<\/td>\n <td>0.196<\/td>\n <td>0.36\/0.44<\/td>\n <td>2.46\/1.48<\/td>\n <td>0.64<\/td>\n <td>0.060<\/td>\n <td>0.25<\/td>\n <td>12.7<\/td>\n <td>0.69<\/td>\n <\/tr>\n <tr>\n <td>1×150\/50<\/td>\n <td>0.124<\/td>\n <td>0.159<\/td>\n <td>0.36\/0.44<\/td>\n <td>2.41\/1.51<\/td>\n <td>0.60<\/td>\n <td>0.056<\/td>\n <td>0.27<\/td>\n <td>11.6<\/td>\n <td>0.75<\/td>\n <\/tr>\n <tr>\n <td>1×185\/50<\/td>\n <td>0.0991<\/td>\n <td>0.128<\/td>\n <td>0.36\/0.44<\/td>\n <td>2.37\/1.54<\/td>\n <td>0.57<\/td>\n <td>0.053<\/td>\n <td>0.30<\/td>\n <td>10.8<\/td>\n <td>0.81<\/td>\n <\/tr>\n <tr>\n <td>1×240\/50<\/td>\n <td>0.0754<\/td>\n <td>0.0979<\/td>\n <td>0.36\/0.44<\/td>\n <td>2.31\/1.57<\/td>\n <td>0.54<\/td>\n <td>0.049<\/td>\n <td>0.33<\/td>\n <td>9.6<\/td>\n <td>0.90<\/td>\n <\/tr>\n <tr>\n <td>1×300\/50<\/td>\n <td>0.0601<\/td>\n <td>0.0789<\/td>\n <td>0.36\/0.44<\/td>\n <td>2.27\/1.59<\/td>\n <td>0.52<\/td>\n <td>0.047<\/td>\n <td>0.36<\/td>\n <td>8.9<\/td>\n <td>0.98<\/td>\n <\/tr>\n <tr>\n <td>1×400\/50<\/td>\n <td>0.0470<\/td>\n <td>0.0630<\/td>\n <td>0.36\/0.44<\/td>\n <td>2.23\/1.62<\/td>\n <td>0.51<\/td>\n <td>0.043<\/td>\n <td>0.40<\/td>\n <td>7.9<\/td>\n <td>1.10<\/td>\n <\/tr>\n <tr>\n <td>1×500\/50<\/td>\n <td>0.0366<\/td>\n <td>0.0506<\/td>\n <td>0.36\/0.44<\/td>\n <td>2.17\/1.63<\/td>\n <td>0.49<\/td>\n <td>0.042<\/td>\n <td>0.44<\/td>\n <td>7.2<\/td>\n <td>1.21<\/td>\n <\/tr>\n <tr>\n <td>1×630\/50<\/td>\n <td>0.0283<\/td>\n <td>0.0412<\/td>\n <td>0.36\/0.44<\/td>\n <td>2.13\/1.65<\/td>\n <td>0.48<\/td>\n <td>0.040<\/td>\n <td>0.50<\/td>\n <td>6.4<\/td>\n <td>1.37<\/td>\n <\/tr>\n <tr>\n <td>1×800\/50<\/td>\n <td>0.0221<\/td>\n <td>0.0344<\/td>\n <td>0.36\/0.44<\/td>\n <td>2.1\/1.67<\/td>\n <td>0.48<\/td>\n <td>0.038<\/td>\n <td>0.57<\/td>\n <td>5.6<\/td>\n <td>1.55<\/td>\n <\/tr>\n <\/tbody>\n <\/table>\n <\/div>\n \n <div class=\"citation\">\n <strong>Source:<\/strong> German Institute for Standardization (DIN). (2018). <em>DIN VDE 0276-620:2018 – Power cables with extruded insulation and their accessories for rated voltages from 6 kV (Um = 7.2 kV) up to 30 kV (Um = 36 kV)<\/em>. Retrieved from <a href=\"https:\/\/www.vde-verlag.de\" rel=\"nofollow noopener\" target=\"_blank\" style=\"color: var(--accent-electric);\">VDE Verlag<\/a>\n <\/div>\n <\/section>\n\n \n <section>\n <h2>Current Carrying Capacity<\/h2>\n <p>Current ratings are calculated according to IEC 60287 methodology under specified installation conditions. The values represent continuous current carrying capacity for different configurations including ground burial (flat and trefoil formation) and aerial installation (flat and trefoil formation), with variations for single point bonding (SPB), cross bonding (CB), and both ends bonded (BE) metallic screen configurations.<\/p>\n \n <div class=\"table-container\">\n <table>\n <thead>\n <tr>\n <th rowspan=\"2\">Conductor<br>Size<\/th>\n <th rowspan=\"2\">Short Circuit<br>Capacity (kA\/s)<\/th>\n <th colspan=\"2\">Ground – Flat<\/th>\n <th colspan=\"2\">Ground – Trefoil<\/th>\n <th colspan=\"2\">Air – Flat<\/th>\n <th colspan=\"2\">Air – Trefoil<\/th>\n <\/tr>\n <tr>\n <th>BE<\/th>\n <th>SPB\/CB<\/th>\n <th>BE<\/th>\n <th>SPB\/CB<\/th>\n <th>BE<\/th>\n <th>SPB\/CB<\/th>\n <th>BE<\/th>\n <th>SPB\/CB<\/th>\n <\/tr>\n <\/thead>\n <tbody>\n <tr>\n <td>1×35\/16<\/td>\n <td>5.0\/3.7<\/td>\n <td>243 A<\/td>\n <td>245 A<\/td>\n <td>230 A<\/td>\n <td>230 A<\/td>\n <td>246 A<\/td>\n <td>248 A<\/td>\n <td>210 A<\/td>\n <td>211 A<\/td>\n <\/tr>\n <tr>\n <td>1×50\/16<\/td>\n <td>7.2\/3.7<\/td>\n <td>288 A<\/td>\n <td>291 A<\/td>\n <td>273 A<\/td>\n <td>273 A<\/td>\n <td>296 A<\/td>\n <td>298 A<\/td>\n <td>252 A<\/td>\n <td>253 A<\/td>\n <\/tr>\n <tr>\n <td>1×70\/25<\/td>\n <td>10.0\/5.3<\/td>\n <td>348 A<\/td>\n <td>356 A<\/td>\n <td>333 A<\/td>\n <td>334 A<\/td>\n <td>363 A<\/td>\n <td>370 A<\/td>\n <td>311 A<\/td>\n <td>313 A<\/td>\n <\/tr>\n <tr>\n <td>1×95\/35<\/td>\n <td>13.6\/7.1<\/td>\n <td>413 A<\/td>\n <td>430 A<\/td>\n <td>400 A<\/td>\n <td>403 A<\/td>\n <td>438 A<\/td>\n <td>454 A<\/td>\n <td>380 A<\/td>\n <td>383 A<\/td>\n <\/tr>\n <tr>\n <td>1×120\/50<\/td>\n <td>17.2\/9.8<\/td>\n <td>456 A<\/td>\n <td>491 A<\/td>\n <td>454 A<\/td>\n <td>460 A<\/td>\n <td>492 A<\/td>\n <td>523 A<\/td>\n <td>435 A<\/td>\n <td>440 A<\/td>\n <\/tr>\n <tr>\n <td>1×150\/50<\/td>\n <td>21.5\/9.8<\/td>\n <td>505 A<\/td>\n <td>554 A<\/td>\n <td>510 A<\/td>\n <td>518 A<\/td>\n <td>555 A<\/td>\n <td>598 A<\/td>\n <td>495 A<\/td>\n <td>502 A<\/td>\n <\/tr>\n <tr>\n <td>1×185\/50<\/td>\n <td>26.5\/9.8<\/td>\n <td>560 A<\/td>\n <td>628 A<\/td>\n <td>575 A<\/td>\n <td>586 A<\/td>\n <td>625 A<\/td>\n <td>685 A<\/td>\n <td>564 A<\/td>\n <td>574 A<\/td>\n <\/tr>\n <tr>\n <td>1×240\/50<\/td>\n <td>34.3\/9.8<\/td>\n <td>634 A<\/td>\n <td>733 A<\/td>\n <td>667 A<\/td>\n <td>684 A<\/td>\n <td>725 A<\/td>\n <td>814 A<\/td>\n <td>665 A<\/td>\n <td>681 A<\/td>\n <\/tr>\n <tr>\n <td>1×300\/50<\/td>\n <td>42.9\/9.8<\/td>\n <td>697 A<\/td>\n <td>830 A<\/td>\n <td>750 A<\/td>\n <td>773 A<\/td>\n <td>812 A<\/td>\n <td>935 A<\/td>\n <td>757 A<\/td>\n <td>779 A<\/td>\n <\/tr>\n <tr>\n <td>1×400\/50<\/td>\n <td>57.2\/9.8<\/td>\n <td>773 A<\/td>\n <td>953 A<\/td>\n <td>849 A<\/td>\n <td>882 A<\/td>\n <td>920 A<\/td>\n <td>1093 A<\/td>\n <td>874 A<\/td>\n <td>906 A<\/td>\n <\/tr>\n <tr>\n <td>1×500\/50<\/td>\n <td>71.5\/9.8<\/td>\n <td>850 A<\/td>\n <td>1088 A<\/td>\n <td>957 A<\/td>\n <td>1002 A<\/td>\n <td>1034 A<\/td>\n <td>1270 A<\/td>\n <td>1003 A<\/td>\n <td>1047 A<\/td>\n <\/tr>\n <\/tbody>\n <\/table>\n <\/div>\n \n <p><strong>Configuration Notes:<\/strong> Trefoil formation represents three cables arranged in triangular configuration with spacing equal to cable diameter (De). Flat formation represents cables arranged linearly with spacing De (ground) or 2\u00d7De (air). SPB (Single Point Bonded) and CB (Cross Bonded) configurations reduce metallic screen losses compared to BE (Both Ends) bonding, resulting in higher current ratings.<\/p>\n \n <div class=\"citation\">\n <strong>Source:<\/strong> CENELEC European Committee for Electrotechnical Standardization. (2023). <em>HD 620 S3:2023 – Distribution cables with extruded insulation for rated voltages from 3.6\/6 (7.2) kV to 20.8\/36 (42) kV<\/em>. Retrieved from <a href=\"https:\/\/www.cenelec.eu\" rel=\"nofollow noopener\" target=\"_blank\" style=\"color: var(--accent-electric);\">CENELEC<\/a>\n <\/div>\n <\/section>\n\n \n <section>\n <h2>Application & Purpose in Wind Energy Systems<\/h2>\n <p>These medium voltage XLPE cables serve as the critical power transmission link within wind turbine installations, conducting generated electrical energy from the nacelle-mounted generator through the tower structure to ground-level distribution equipment. The cables must withstand continuous flexing due to yaw movements, temperature cycling from ambient to full load conditions, and potential exposure to moisture infiltration.<\/p>\n \n <p>Wind farm cable networks typically employ these cables in three primary configurations. Tower cables run vertically through the turbine structure, subjected to minimal mechanical stress but requiring adequate ampacity for full generator output. Inter-array cables connect multiple turbines within the wind farm, often installed underground in dedicated trenches or ducts. Export cables transmit consolidated power from the wind farm collection point to grid connection substations, frequently covering significant distances.<\/p>\n \n <p>The multi-standard compliance (HD 620, IEC 60502-2, BS 7870, DIN VDE 0276-620) ensures these cables meet harmonized European requirements while maintaining compatibility with international specifications. This broad acceptance facilitates use in diverse geographic markets and regulatory environments, from offshore installations in the North Sea to onshore wind farms in developing markets.<\/p>\n \n <div class=\"citation\">\n <strong>Source:<\/strong> National Renewable Energy Laboratory (NREL). (2020). <em>Wind Energy Cable System Design and Installation Best Practices<\/em>. U.S. Department of Energy. Retrieved from <a href=\"https:\/\/www.nrel.gov\" rel=\"nofollow noopener\" target=\"_blank\" style=\"color: var(--accent-electric);\">NREL Publications<\/a>\n <\/div>\n <\/section>\n\n \n <section>\n <h2>Key Material Characteristics<\/h2>\n \n <h3>Cross-Linked Polyethylene (XLPE) Insulation<\/h3>\n <p>XLPE insulation technology represents the industry standard for medium voltage power cables due to its superior electrical, thermal, and mechanical properties. The cross-linking process creates three-dimensional molecular bonds that enhance thermal stability, allowing continuous operation at 90\u00b0C conductor temperature with emergency overload capability to 130\u00b0C. XLPE exhibits excellent dielectric strength with low dielectric losses, contributing to improved energy efficiency and reduced heat generation during operation.<\/p>\n \n <p>Compared to traditional paper-insulated lead-covered (PILC) cables, XLPE technology eliminates oil impregnation requirements, reducing environmental concerns and maintenance needs. The solid dielectric construction provides superior moisture resistance, critical for underground installations where water ingress represents a primary failure mechanism. XLPE cables demonstrate exceptional resistance to partial discharge degradation, ensuring extended service life in demanding applications.<\/p>\n \n <h3>Copper Conductor Benefits<\/h3>\n <p>Copper conductors provide optimal electrical conductivity (58 MS\/m at 20\u00b0C), second only to silver among practical conductor materials. The Class 2 stranded construction balances current-carrying capacity with mechanical flexibility, essential for installation through tower cable trays and around equipment. Compacted strand design (RMC designation) reduces void spaces between individual wires, minimizing oxidation potential and improving current distribution across the conductor cross-section.<\/p>\n \n <p>The circular stranded configuration ensures uniform current density distribution, reducing skin effect losses at power frequency and improving overall efficiency. Copper’s excellent thermal conductivity (401 W\/m\u00b7K) facilitates efficient heat dissipation from the conductor core through the insulation system, critical for achieving rated current capacity under continuous loading conditions.<\/p>\n \n <h3>Metallic Screen Functionality<\/h3>\n <p>The metallic screen layer serves multiple critical functions in medium voltage cable design. Electrically, the screen provides a uniform cylindrical equipotential surface around the insulation, controlling radial electrical field distribution and preventing discharge inception at the insulation outer surface. The screen also provides a low-impedance fault current return path, enabling rapid fault detection and protection system operation.<\/p>\n \n <p>Mechanically, the screen protects the sensitive insulation from external mechanical damage during installation and service. The screen configuration (copper wire or tape) affects cable flexibility, with wire screens providing superior bending characteristics for applications requiring frequent movement or tight radius bends.<\/p>\n \n <div class=\"citation\">\n <strong>Source:<\/strong> IEEE Power & Energy Society. (2015). <em>IEEE Standard 1185-2010 – Recommended Practice for Installation Design and Installation of Transmission and Distribution Cable Systems in Substations<\/em>. Institute of Electrical and Electronics Engineers. Retrieved from <a href=\"https:\/\/standards.ieee.org\" rel=\"nofollow noopener\" target=\"_blank\" style=\"color: var(--accent-electric);\">IEEE Standards<\/a>\n <\/div>\n <\/section>\n\n \n <section>\n <h2>Industry Resources & Related Information<\/h2>\n <p>For comprehensive information on specialized cable applications and industry best practices, the following resources provide valuable technical guidance and product specifications across various industrial sectors:<\/p>\n \n <div class=\"external-links\">\n <a href=\"https:\/\/reelingcable.com\" target=\"_blank\" class=\"external-link\" rel=\"noopener\">Reeling Cable Systems<\/a>\n <a href=\"https:\/\/amplexmining.com.au\" target=\"_blank\" class=\"external-link\" rel=\"noopener\">Amplex Mining Solutions<\/a>\n <a href=\"https:\/\/miningcable.cl\" target=\"_blank\" class=\"external-link\" rel=\"noopener\">Mining Cable Technologies<\/a>\n <a href=\"https:\/\/cranecable.com\" target=\"_blank\" class=\"external-link\" rel=\"noopener\">Crane Cable Applications<\/a>\n <a href=\"https:\/\/feichuncable.com\" target=\"_blank\" class=\"external-link\" rel=\"noopener\">Feichun Cable Products<\/a>\n <\/div>\n \n <p>These industry partners provide specialized expertise in mobile cable applications, mining industry solutions, overhead crane installations, and custom cable design services. Their technical documentation and application guides complement the information presented here, offering deeper insights into specific installation scenarios and operational requirements.<\/p>\n <\/section>\n\n \n <section>\n <h2>Contact Anhui Feichun Special Cable Co., Ltd.<\/h2>\n <p>For technical inquiries, quotations, or project-specific cable specifications, please contact our engineering team through any of the following channels:<\/p>\n \n <div class=\"contact-grid\">\n <div class=\"contact-card\">\n <h4>\ud83d\udcf1 WhatsApp Support<\/h4>\n <div class=\"contact-info\">\n <a href=\"https:\/\/wa.me\/8613855123218\" target=\"_blank\" rel=\"noopener\">+86 13855 123218<\/a>\n <\/div>\n <p style=\"margin-top: 1rem; font-size: 0.9rem;\">Direct technical support and quick response for urgent inquiries<\/p>\n <\/div>\n \n <div class=\"contact-card\">\n <h4>\ud83d\udce7 Technical Department<\/h4>\n <div class=\"contact-info\">\n <a href=\"mailto:tech@feichuncables.com\">tech@feichuncables.com<\/a>\n <\/div>\n <p style=\"margin-top: 1rem; font-size: 0.9rem;\">General technical inquiries and product specifications<\/p>\n <\/div>\n \n <div class=\"contact-card\">\n <h4>\ud83d\udce7 Sales Engineering<\/h4>\n <div class=\"contact-info\">\n <a href=\"mailto:zihao.yang@feichuncable.com\">zihao.yang@feichuncable.com<\/a>\n <\/div>\n <div class=\"contact-info\">\n <a href=\"mailto:ziyu.huang@feichuncables.com\">ziyu.huang@feichuncables.com<\/a>\n <\/div>\n <p style=\"margin-top: 1rem; font-size: 0.9rem;\">Project quotations and custom specifications<\/p>\n <\/div>\n <\/div>\n \n <p style=\"margin-top: 2rem;\">Our engineering team provides comprehensive support including cable selection guidance, installation recommendations, compliance verification, and custom cable design for specialized applications. We maintain extensive technical documentation and can provide detailed test reports, quality certifications, and compliance declarations for all standard and custom cable products.<\/p>\n <\/section>\n\n \n <section>\n <h2>Conclusion<\/h2>\n <p>Medium voltage XLPE cables conforming to HD 620 S3:2023, IEC 60502-2:2014, BS 7870-4.10:2011, and DIN VDE 0276-620:2018 standards represent the optimal solution for wind turbine power transmission applications. The combination of XLPE insulation technology, copper conductor efficiency, and robust mechanical design ensures reliable operation under the demanding conditions characteristic of renewable energy installations.<\/p>\n \n <p>Anhui Feichun Special Cable Co., Ltd. manufactures these cables to the highest quality standards, employing advanced production techniques and rigorous quality control procedures. Our commitment to technical excellence and customer support ensures that every cable meets or exceeds specified performance requirements, contributing to the reliable operation of wind energy infrastructure worldwide.<\/p>\n \n <p>As the global renewable energy sector continues its rapid expansion, the importance of reliable electrical infrastructure becomes increasingly critical. These specialized cables form an integral component of that infrastructure, quietly enabling the transformation of wind energy into clean electrical power for millions of consumers worldwide.<\/p>\n <\/section>\n <\/div>\n\n <footer>\n <p>© 2024 Anhui Feichun Special Cable Co., Ltd. (\u5b89\u5fbd\u98de\u7eaf\u7279\u79cd\u7535\u7f06\u6709\u9650\u516c\u53f8) | All technical data subject to manufacturing tolerances and standard conditions | Specifications subject to change without notice<\/p>\n <p style=\"margin-top: 0.5rem; font-size: 0.85rem;\">This technical documentation is provided for informational purposes. Final cable selection should be performed by qualified electrical engineers considering specific project requirements.<\/p>\n <\/footer>\n<\/body>\n<\/html>\n\n\n\n<div data-wp-interactive=\"core\/file\" class=\"wp-block-file\"><object data-wp-bind--hidden=\"!state.hasPdfPreview\" hidden class=\"wp-block-file__embed\" data=\"https:\/\/feichuncables.com\/blog\/wp-content\/uploads\/Mining-Cable-Specification-_-Anhui-Feichun-Special-Cable-Co.-Ltd_.pdf\" type=\"application\/pdf\" style=\"width:100%;height:600px\" aria-label=\"\u5d4c\u5165 Mining Cable Specification _ Anhui Feichun Special Cable Co., Ltd_\"><\/object><a id=\"wp-block-file--media-0ba036a2-6955-40ab-b11f-d0498b764a45\" href=\"https:\/\/feichuncables.com\/blog\/wp-content\/uploads\/Mining-Cable-Specification-_-Anhui-Feichun-Special-Cable-Co.-Ltd_.pdf\">Mining Cable Specification _ Anhui Feichun Special Cable Co., Ltd_<\/a><a href=\"https:\/\/feichuncables.com\/blog\/wp-content\/uploads\/Mining-Cable-Specification-_-Anhui-Feichun-Special-Cable-Co.-Ltd_.pdf\" class=\"wp-block-file__button wp-element-button\" aria-describedby=\"wp-block-file--media-0ba036a2-6955-40ab-b11f-d0498b764a45\" download>\u4e0b\u8f7d<\/a><\/div>\n","protected":false},"excerpt":{"rendered":"YHAKXS \u2013 Compliant with HD 620 S3:2023 Part 10 Section R | A2XSY \u2013 Per IEC 60502-2:2014 and BS 7870-4.10:2011 | NA2XSY \u2013 According to DIN VDE 0276-620:2018. These designations indicate aluminum conductor (A2X\/NA2X) or copper conductor (YH) variants with XLPE insulation (X) and copper wire screen (S) with PVC outer sheath (Y).","protected":false},"author":1,"featured_media":2856,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"csco_singular_sidebar":"left","csco_page_header_type":"title","csco_page_load_nextpost":"","footnotes":""},"categories":[9679,9563,1,10561],"tags":[10634,10632,10636,10631,10623,10625,10633,10635,10627,10630,10628,5580,10591,10624,10613,10568,3229,10610,10569,10585,10621,4506,4336,10600,10603,10599,10601,1839,3228,10629,10626,10639,1001,10595,9575,10586,10617,10565,10604,10588,1146,10614,10566,10607,6953,5329,10616,10637,10581,149,10562,10592,10570,10609,10615,10564,10606,10619,10578,10574,9852,10618,10571,9650,1084,10622,10590,9723,10587,766,1109,10589,7312,10594,9864,10598,10572,9865,10580,10638,10576,1069,10596,10608,10593,10577,10582,10579,10573,10584,10620,10583,10597,9649,10611,10563,10575,10612,10567,10605,10602],"class_list":["post-2855","post","type-post","status-publish","format-standard","has-post-thumbnail","category-xlpe-cable","category-medium-voltage-cable","category-uncategorized","category-wind-turbine-cable","tag-120mm2-cable","tag-150mm2-cable","tag-185mm2-cable","tag-240mm2-cable","tag-300mm2-cable","tag-35mm2-cable","tag-400mm2-cable","tag-500mm2-cable","tag-50mm2-cable","tag-630mm2-cable","tag-70mm2-cable","tag-8-7-15kv-cable","tag-8-7-15kv-cable-datasheet","tag-95mm2-cable","tag-a2xsy","tag-a2xsy-cable","tag-anhui-feichun-cable","tag-best-cable-for-wind-turbines","tag-bs-7870-4-10-cable","tag-buried-cable-0-7m-depth","tag-buried-power-cable","tag-cable-ampacity","tag-cable-ampacity-rating","tag-cable-capacitance-per-km","tag-cable-charging-current","tag-cable-conductor-resistance","tag-cable-inductance-values","tag-cable-reactance-values","tag-china-cable-manufacturer","tag-circular-stranded-conductor","tag-class-2-conductor","tag-collection-system-cable","tag-copper-conductor-cable","tag-copper-conductor-wind-cable","tag-copper-wire-screen","tag-cross-bonded-cable","tag-din-vde-0276-620","tag-din-vde-0276-620-cable","tag-electrical-field-stress-cable","tag-flat-formation-cable","tag-generator-cable","tag-hd-620-s32023","tag-hd-620-s32023-cable","tag-hd-620-vs-iec-60502-cable","tag-iec-60502-2-cable","tag-iec-60502-2-compliant-cable","tag-iec-60502-22014","tag-inter-array-cable","tag-inter-array-cable-wind-farm","tag-medium-voltage-cable","tag-medium-voltage-cable-17-5kv","tag-medium-voltage-cable-for-wind-turbines","tag-medium-voltage-xlpe-cable","tag-mv-cable-comparison-chart","tag-na2xsy","tag-na2xsy-cable","tag-na2xsy-cable-specifications","tag-nacelle-cable","tag-nacelle-cable-system","tag-nacelle-to-tower-cable","tag-offshore-wind-cable","tag-onshore-wind-farm-cable","tag-onshore-wind-park-cable","tag-pvc-sheath-cable","tag-renewable-energy-cable","tag-rmc-cable","tag-short-circuit-capacity-cable","tag-short-circuit-rating","tag-single-point-bonded-cable","tag-torsion-resistant-cable","tag-transformer-cable","tag-trefoil-formation-cable","tag-underground-mv-cable","tag-what-is-wind-turbine-cable","tag-wind-energy-cable","tag-wind-energy-power-cable-supplier","tag-wind-farm-power-cable","tag-wind-generator-cable","tag-wind-park-collection-cable","tag-wind-park-electrical","tag-wind-tower-cable","tag-wind-turbine-cable","tag-wind-turbine-cable-manufacturer-china","tag-wind-turbine-cable-selection-guide","tag-wind-turbine-cable-specifications","tag-wind-turbine-components","tag-wind-turbine-gearbox-cable","tag-wind-turbine-generator-cable","tag-wind-turbine-internal-cable","tag-wind-turbine-pitch-control-cable","tag-wind-turbine-specifications","tag-wind-turbine-transformer-cable","tag-xlpe-cable-current-rating","tag-xlpe-insulation-cable","tag-xlpe-power-cable","tag-xlpe-power-cable-8-7-15kv","tag-yaw-system-cable","tag-yhakxs","tag-yhakxs-cable","tag-yhakxs-vs-a2xsy-cable","tag-zero-sequence-impedance-cable","cs-entry"],"_links":{"self":[{"href":"https:\/\/feichuncables.com\/blog\/wp-json\/wp\/v2\/posts\/2855","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/feichuncables.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/feichuncables.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/feichuncables.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/feichuncables.com\/blog\/wp-json\/wp\/v2\/comments?post=2855"}],"version-history":[{"count":5,"href":"https:\/\/feichuncables.com\/blog\/wp-json\/wp\/v2\/posts\/2855\/revisions"}],"predecessor-version":[{"id":2864,"href":"https:\/\/feichuncables.com\/blog\/wp-json\/wp\/v2\/posts\/2855\/revisions\/2864"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/feichuncables.com\/blog\/wp-json\/wp\/v2\/media\/2856"}],"wp:attachment":[{"href":"https:\/\/feichuncables.com\/blog\/wp-json\/wp\/v2\/media?parent=2855"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/feichuncables.com\/blog\/wp-json\/wp\/v2\/categories?post=2855"},{"taxonomy":"post_tag","e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{"id":2855,"date":"2025-12-11T16:31:00","date_gmt":"2025-12-11T08:31:00","guid":{"rendered":"https:\/\/feichuncables.com\/blog\/?p=2855"},"modified":"2025-12-11T17:01:53","modified_gmt":"2025-12-11T09:01:53","slug":"what-is-wind-turbine-cable","status":"publish","type":"post","link":"https:\/\/feichuncables.com\/blog\/what-is-wind-turbine-cable\/","title":{"rendered":"What is\u00a0Wind Turbine Cable?"},"content":{"rendered":"\n

Medium Voltage XLPE Power Cable 8.7\/15 (17.5) kV Technical Guide<\/p>\n\n\n\n