What is PROTOLON XPRT -50\u00b0C \/ PROTOLON XPRT-LWL -50\u00b0C: Cold-Resistant Medium Voltage Reeling Cable \u2014 In-Depth Engineering Analysis<\/title>\n\n <style>\n :root{\n --bg:#0b111a;\n --panel:#141f2f;\n --panel2:#1b2a40;\n --line:#354a66;\n --text:#eef5ff;\n --muted:#b8c7da;\n --red:#ff3b30;\n --orange:#ff8a00;\n --yellow:#ffd54a;\n --blue:#2f8cff;\n --green:#00d084;\n --cyan:#4ecdc4;\n --purple:#b388ff;\n }\n *{box-sizing:border-box;margin:0;padding:0}\n html{scroll-behavior:smooth}\n body{\n font-family:\"Segoe UI\",\"Microsoft YaHei\",Arial,sans-serif;\n background:var(--bg);\n color:var(--text);\n line-height:1.75;\n overflow-x:hidden;\n }\n .container{max-width:1080px;margin:0 auto;padding:0 22px}\n .hero{\n padding:74px 20px;\n text-align:center;\n border-bottom:3px solid var(--cyan);\n background:\n radial-gradient(circle at 10% 12%,rgba(78,205,196,.34),transparent 34%),\n radial-gradient(circle at 88% 18%,rgba(47,140,255,.30),transparent 34%),\n 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h1{font-size:31px}\n h2{font-size:27px}\n h3{font-size:22px}\n .hero{padding:48px 16px}\n .value{font-size:27px}\n .table-scroll table{min-width:1150px}\n .table-scroll.wide table{min-width:1550px}\n }\n <\/style>\n\n<\/head>\n<body>\n\n <section class=\"hero\">\n <div class=\"container\">\n <div class=\"badges\">\n <span class=\"badge b1\">PROTOLON XPRT -50\u00b0C<\/span>\n <span class=\"badge b2\">PROTOLON XPRT-LWL -50\u00b0C<\/span>\n <span class=\"badge b3\">(N)TSCGEWOEU \/ (N)TSKCGEWOEU<\/span>\n <span class=\"badge b4\">Medium Voltage Reeling Cable<\/span>\n <span class=\"badge b5\">Fully Flexible at -50\u00b0C<\/span>\n <\/div>\n <h1>What is PROTOLON XPRT -50\u00b0C \/ PROTOLON XPRT-LWL -50\u00b0C: An In-Depth Engineering Analysis of the Cold-Resistant Medium Voltage Reeling Cable<\/h1>\n <p>PROTOLON XPRT -50\u00b0C and PROTOLON XPRT-LWL -50\u00b0C are flexible medium voltage reeling cables designed for high to extreme mechanical stress in very cold environments. The family covers multiple voltage classes from 3.6\/6 kV to 12\/20 kV, with the LWL version adding integrated fibre optics for combined power and data transmission. Its defining engineering value is not only medium voltage power supply, but reliable reeling, bending, torsion and dynamic tensile performance even in fully flexible operation down to -50\u00b0C.<\/p>\n <div class=\"meta\">\n <span>\u2713 Medium voltage reeling cable<\/span>\n <span>\u2713 3.6\/6 kV, 6\/10 kV, 8.7\/15 kV, 12\/20 kV<\/span>\n <span>\u2713 Fully flexible operation down to -50\u00b0C<\/span>\n <span>\u2713 Optional LWL fibre optics up to 24 fibres<\/span>\n <span>\u2713 Reeling operation up to 240 m\/min<\/span>\n <\/div>\n\n“`\n <nav class=\"toc\">\n <a href=\"#definition\">Definition<\/a>\n <a href=\"#voltage\">Voltage Classes<\/a>\n <a href=\"#construction\">Construction<\/a>\n <a href=\"#cold\">-50\u00b0C Design<\/a>\n <a href=\"#lwl\">LWL Version<\/a>\n <a href=\"#mechanical\">Mechanical Data<\/a>\n <a href=\"#selection\">Selection<\/a>\n <a href=\"#faq\">FAQ<\/a>\n <\/nav>\n<\/div>\n“`\n\n <\/section>\n\n <div class=\"container\">\n <div class=\"cards\">\n <div class=\"card\"><div class=\"label\">Cold Flexibility<\/div><div class=\"value\">-50\u00b0C<\/div><div class=\"unit\">Fully flexible operation min. -50\u00b0C<\/div><\/div>\n <div class=\"card\"><div class=\"label\">Voltage Range<\/div><div class=\"value\">4<\/div><div class=\"unit\">3.6\/6, 6\/10, 8.7\/15 and 12\/20 kV classes<\/div><\/div>\n <div class=\"card\"><div class=\"label\">Travel Speed<\/div><div class=\"value\">240<\/div><div class=\"unit\">Reeling operation up to 240 m\/min<\/div><\/div>\n <div class=\"card\"><div class=\"label\">Fibre Optics<\/div><div class=\"value\">24<\/div><div class=\"unit\">Optional integration with up to 24 optical fibres<\/div><\/div>\n <div class=\"card\"><div class=\"label\">Conductor Temp.<\/div><div class=\"value\">90\u00b0C<\/div><div class=\"unit\">Maximum operating temperature of the conductor<\/div><\/div>\n <div class=\"card\"><div class=\"label\">Short Circuit<\/div><div class=\"value\">250\u00b0C<\/div><div class=\"unit\">Maximum short-circuit conductor temperature<\/div><\/div>\n <\/div>\n\n“`\n<main>\n <div class=\"divider\" id=\"definition\"><span>I<\/span><hr><span class=\"caption\">Definition and application<\/span><\/div>\n\n <h2>1. What is PROTOLON XPRT -50\u00b0C \/ PROTOLON XPRT-LWL -50\u00b0C?<\/h2>\n\n <p><strong>PROTOLON XPRT -50\u00b0C<\/strong> is a cold-resistant flexible medium voltage reeling cable for high to extreme mechanical stress. The standard power version uses the type designation <strong>(N)TSCGEWOEU<\/strong>. The fibre-optic hybrid version, <strong>PROTOLON XPRT-LWL -50\u00b0C<\/strong>, uses the LWL designation <strong>(N)TSKCGEWOEU<\/strong>.<\/p>\n\n <p>The family is based on <strong>DIN VDE 0250-813<\/strong> and is designed for mobile equipment such as fast-moving container cranes and other large dynamic machinery. It is intended for applications involving high travel speeds, dynamic tensile loads, frequent directional changes across multiple planes, churning over rollers and torsional forces.<\/p>\n\n <p>The decisive difference from standard medium voltage reeling cables is the cold-temperature design boundary: this family remains suitable for <strong>fully flexible operation down to -50\u00b0C<\/strong>. That makes it relevant for cold regions, winter port operations, mining machinery, Arctic and sub-Arctic outdoor terminals, and any project where a conventional flexible rubber cable may become too stiff under low-temperature movement.<\/p>\n\n <div class=\"note\">\n <h4>Technical thesis<\/h4>\n <p><strong>Engineering argument:<\/strong> PROTOLON XPRT -50\u00b0C is not simply a standard reeling cable with a lower storage temperature. The insulation, inner sheath and outer sheath are all based on special compounds for extreme cold conditions, while the cable still needs to survive dynamic reel tension, roller bending and torsion. The key engineering value is the combination of medium voltage electrical safety, high mechanical stress capability and fully flexible -50\u00b0C mobility in one cable system.<\/p>\n <\/div>\n\n <div class=\"table-scroll medium\">\n <table>\n <thead>\n <tr>\n <th>Product family<\/th>\n <th>Type designation<\/th>\n <th>Construction concept<\/th>\n <th>Primary engineering function<\/th>\n <\/tr>\n <\/thead>\n <tbody>\n <tr>\n <td>PROTOLON XPRT -50\u00b0C<\/td>\n <td>(N)TSCGEWOEU<\/td>\n <td>3C+3G, also with control or BUS options<\/td>\n <td>Cold-resistant medium voltage reeling power cable for dynamic machinery<\/td>\n <\/tr>\n <tr>\n <td>PROTOLON XPRT-LWL -50\u00b0C<\/td>\n <td>(N)TSKCGEWOEU<\/td>\n <td>LWL: 3C+2G+FO, also with control or BUS options<\/td>\n <td>Cold-resistant opto-power reeling cable for combined power and data transmission<\/td>\n <\/tr>\n <\/tbody>\n <\/table>\n <\/div>\n\n <div class=\"divider\" id=\"voltage\"><span>II<\/span><hr><span class=\"caption\">Electrical parameters and voltage classes<\/span><\/div>\n\n <h2>2. Electrical Parameters: From 3.6\/6 kV to 12\/20 kV<\/h2>\n\n <p>The -50\u00b0C family covers several medium voltage classes. The supplied electrical table lists <strong>3.6\/6 kV<\/strong>, <strong>6\/10 kV<\/strong>, <strong>8.7\/15 kV<\/strong> and <strong>12\/20 kV<\/strong>, with corresponding maximum permissible operating voltage and AC test voltage values.<\/p>\n\n <div class=\"table-scroll medium\">\n <table>\n <thead>\n <tr>\n <th>Rated voltage U0\/U [kV]<\/th>\n <th>Max. permissible operating voltage AC [kV]<\/th>\n <th>Max. permissible operating voltage DC [kV]<\/th>\n <th>AC test voltage [kV]<\/th>\n <th>Engineering interpretation<\/th>\n <\/tr>\n <\/thead>\n <tbody>\n <tr><td>3.6\/6<\/td><td>4.2\/7.2<\/td><td>\u2014<\/td><td>11<\/td><td>For 6 kV class mobile medium voltage supply systems<\/td><\/tr>\n <tr><td>6\/10<\/td><td>6.9\/12<\/td><td>\u2014<\/td><td>17<\/td><td>For 10 kV class reeling supply systems<\/td><\/tr>\n <tr><td>8.7\/15<\/td><td>10.4\/18<\/td><td>\u2014<\/td><td>24<\/td><td>For 15 kV class crane and mobile machinery systems<\/td><\/tr>\n <tr><td>12\/20<\/td><td>13.9\/24<\/td><td>\u2014<\/td><td>29<\/td><td>For 20 kV class large mobile equipment supply<\/td><\/tr>\n <\/tbody>\n <\/table>\n <\/div>\n\n <p>The product heading also references <strong>1.8\/3 kV \/ 3.6\/6 kV<\/strong> as part of the family positioning. The electrical parameter table provided here explicitly lists values from 3.6\/6 kV upward, so project documentation should confirm the exact electrical data if a 1.8\/3 kV version is requested.<\/p>\n\n <div class=\"warning\">\n <h4>Voltage selection warning<\/h4>\n <p><strong>Engineering warning:<\/strong> voltage class selection should not be based on the nominal system voltage alone. The engineer should also verify maximum permissible operating voltage, AC test voltage, termination system, cable outer diameter, reel geometry, moving bending radius and installation temperature. In cold reeling duty, electrical and mechanical verification are inseparable.<\/p>\n <\/div>\n\n <div class=\"divider\" id=\"construction\"><span>III<\/span><hr><span class=\"caption\">Cable construction<\/span><\/div>\n\n <h2>3. Construction Analysis: Conductors, EPR Insulation, Field Control, PCP Sheath and Polyester Braid<\/h2>\n\n <p>The cable construction follows the architecture of a high mechanical stress medium voltage reeling cable, but with compounds selected for extreme cold conditions. Both the power-only version and the LWL hybrid version are designed around flexible tinned copper conductors, EPR-based insulation, semiconductive field control and a special PCP sheath system for cold dynamic operation.<\/p>\n\n <div class=\"layer\">\n <div class=\"layer-title\">Layer 1 \u2014 Conductor: electrolytic copper tinned, very finely stranded, class FS<\/div>\n <div class=\"layer-text\">The conductor is made of tinned electrolytic copper with very fine stranding, class FS. Fine stranding supports repeated bending on reels and rollers, while tinning improves strand surface stability in outdoor, humid and industrial environments.<\/div>\n <\/div>\n\n <div class=\"layer\">\n <div class=\"layer-title\">Layer 2 \u2014 Insulation: special high-quality EPR compound for -50\u00b0C operation<\/div>\n <div class=\"layer-text\">The insulation is a special compound based on high-quality EPR for extreme cold conditions down to -50\u00b0C. This is the key electrical insulation layer and also a mechanical component that must remain elastic under low-temperature movement.<\/div>\n <\/div>\n\n <div class=\"layer\">\n <div class=\"layer-title\">Layer 3 \u2014 Electrical field control: inner and outer semiconductive layers<\/div>\n <div class=\"layer-text\">Inner and outer semiconductive layers control the medium voltage electric field around each core. In a moving reeling cable, these layers must retain both electrical interface quality and mechanical flexibility under repeated bending.<\/div>\n <\/div>\n\n <div class=\"layer\">\n <div class=\"layer-title\">Layer 4 \u2014 Core arrangement: three-core design with split earth conductors<\/div>\n <div class=\"layer-text\">The power-only version uses a three-core design with earth split into three interstices. This 3C+3G arrangement helps maintain a round cable shape and balanced bending behaviour in dynamic reel service.<\/div>\n <\/div>\n\n <div class=\"layer\">\n <div class=\"layer-title\">Layer 5 \u2014 LWL arrangement: three-core design with cradle separator, earth and FO element<\/div>\n <div class=\"layer-text\">The LWL version uses a three-core design with cradle separator, earth and fibre-optic element arranged in the interstices. In this version, the structure becomes 3C+2G+FO, enabling combined power and optical data transmission within one reeling cable.<\/div>\n <\/div>\n\n <div class=\"layer\">\n <div class=\"layer-title\">Layer 6 \u2014 Sheath system: special PCP rubber compound better than 5GM5<\/div>\n <div class=\"layer-text\">The inner sheath and outer sheath are made from a special PCP rubber compound, better than 5GM5, for extreme cold conditions down to -50\u00b0C. The sheath system provides abrasion resistance, tear resistance, environmental resistance and low-temperature flexibility.<\/div>\n <\/div>\n\n <div class=\"layer\">\n <div class=\"layer-title\">Layer 7 \u2014 Integrated reinforcement: polyester braid for torsion protection<\/div>\n <div class=\"layer-text\">An integrated polyester braid provides torsion protection. This reinforcement helps control cable twist, cross-section deformation and dynamic mechanical stress when the cable passes over rollers or changes direction across multiple planes.<\/div>\n <\/div>\n\n <div class=\"note\">\n <h4>Why the sheath system matters<\/h4>\n <p><strong>Engineering argument:<\/strong> at -50\u00b0C, the sheath is no longer just an abrasion layer. It becomes a decisive mechanical spring in the cable system. If the sheath hardens, the moving bending radius effectively increases, roller pressure rises, internal elements become overstressed and the cable loses dynamic life. The special PCP sheath system is therefore central to both cold flexibility and mechanical reliability.<\/p>\n <\/div>\n\n <div class=\"divider\" id=\"cold\"><span>IV<\/span><hr><span class=\"caption\">Cold-temperature engineering<\/span><\/div>\n\n <h2>4. -50\u00b0C Cold Flexibility: Why Fully Flexible Operation at -50\u00b0C is the Key Feature<\/h2>\n\n <p>Many cables can be stored or installed at low temperatures, but far fewer can operate dynamically at those temperatures. PROTOLON XPRT -50\u00b0C is specified with an ambient temperature range for <strong>fully flexible operation from -50\u00b0C to +80\u00b0C<\/strong>. That means the cable is intended to move, bend, reel and pass over rollers at -50\u00b0C, not merely remain stationary.<\/p>\n\n <div class=\"table-scroll\">\n <table>\n <thead>\n <tr>\n <th>Thermal parameter<\/th>\n <th>Value<\/th>\n <th>Engineering interpretation<\/th>\n <\/tr>\n <\/thead>\n <tbody>\n <tr><td>Maximum operating temperature of conductor<\/td><td>90\u00b0C<\/td><td>Continuous thermal limit of the conductor and insulation system<\/td><\/tr>\n <tr><td>Maximum short-circuit temperature of conductor<\/td><td>250\u00b0C<\/td><td>Short-time thermal withstand basis<\/td><\/tr>\n <tr><td>Ambient temperature for fixed installation<\/td><td>-50\u00b0C to +80\u00b0C<\/td><td>Suitable for static or fixed sections in extreme cold environments<\/td><\/tr>\n <tr><td>Ambient temperature in fully flexible operation<\/td><td>-50\u00b0C to +80\u00b0C<\/td><td>Suitable for dynamic reel, roller and moving operation at -50\u00b0C<\/td><\/tr>\n <\/tbody>\n <\/table>\n <\/div>\n\n <p>The distinction between fixed and fully flexible temperature is critical. A cable that survives fixed installation at -50\u00b0C may still be unsuitable for a moving reel at the same temperature. In this product family, both fixed and fully flexible minimum temperatures are stated as -50\u00b0C, which is the central engineering reason for choosing the -50\u00b0C version.<\/p>\n\n <div class=\"formula\">\n Cold Reeling Suitability =\n EPR Cold Insulation + PCP Cold Sheath + Very Fine Stranding + Polyester Anti-Torsion Braid + Correct Bending Radius + Controlled Reel Tension\n <\/div>\n\n <div class=\"divider\" id=\"lwl\"><span>V<\/span><hr><span class=\"caption\">LWL fibre-optic hybrid version<\/span><\/div>\n\n <h2>5. PROTOLON XPRT-LWL -50\u00b0C: Power and Data Transmission in One Cold-Resistant Reeling Cable<\/h2>\n\n <p>The LWL version is available with integrated fibre optics for combined transmission of power and data. The fibre-optic element can contain up to <strong>24 optical fibres<\/strong>, with single-mode E9 or multi-mode G62.5 or G50 options.<\/p>\n\n <p>This makes the LWL version relevant for advanced communication and control capabilities on container cranes, large mobile machinery and automation-heavy equipment. The same reeling cable can carry medium voltage power, protective earth and optical communication, reducing the need for a separate fibre-optic reel or cable route.<\/p>\n\n <div class=\"table-scroll\">\n <table>\n <thead>\n <tr>\n <th>Data transmission feature<\/th>\n <th>Available option<\/th>\n <th>Engineering meaning<\/th>\n <\/tr>\n <\/thead>\n <tbody>\n <tr><td>Maximum fibre count<\/td><td>Up to 24 fiber optics<\/td><td>Enough for redundant communication, control, monitoring and future spare channels<\/td><\/tr>\n <tr><td>Single-mode option<\/td><td>E9<\/td><td>Suitable for long-distance and high-bandwidth crane or terminal communication<\/td><\/tr>\n <tr><td>Multi-mode option<\/td><td>G62.5 or G50<\/td><td>Suitable for specific equipment networks and site communication architectures<\/td><\/tr>\n <tr><td>Hybrid structure<\/td><td>3C+2G+FO<\/td><td>Combines medium voltage power, protective earth and optical data in one cable<\/td><\/tr>\n <\/tbody>\n <\/table>\n <\/div>\n\n <div class=\"note\">\n <h4>Power + data under cold movement<\/h4>\n <p><strong>Engineering argument:<\/strong> in cold climates, running a separate fibre-optic reeling cable adds another moving system that must survive the same low-temperature bending, torsion and roller stress. The LWL hybrid approach consolidates power and data into one cable path, but it also makes correct reel design, bending radius and fibre termination especially important.<\/p>\n <\/div>\n\n <div class=\"divider\" id=\"mechanical\"><span>VI<\/span><hr><span class=\"caption\">Mechanical, chemical and environmental performance<\/span><\/div>\n\n <h2>6. Mechanical, Chemical and Environmental Parameters<\/h2>\n\n <p>The cable is designed for high to extreme mechanical stress, including high travel speeds, dynamic tensile loads, frequent directional changes across multiple planes, churning over rollers and torsional forces. The maximum tensile load on the conductor is <strong>20 N\/mm\u00b2<\/strong>, bending radii follow <strong>DIN VDE 0298, part 3<\/strong>, and reeling operation is specified up to <strong>240 m\/min<\/strong>.<\/p>\n\n <div class=\"table-scroll medium\">\n <table>\n <thead>\n <tr>\n <th>Parameter group<\/th>\n <th>Value \/ reference<\/th>\n <th>Engineering interpretation<\/th>\n <\/tr>\n <\/thead>\n <tbody>\n <tr><td>Max. tensile load on conductor<\/td><td>20 N\/mm\u00b2<\/td><td>Primary tensile verification value for the conductor system<\/td><\/tr>\n <tr><td>Bending radii min.<\/td><td>According to DIN VDE 0298, part 3<\/td><td>Reel, roller and fixed route geometry must follow the applicable bending rules<\/td><\/tr>\n <tr><td>Travel speed<\/td><td>Reeling operation up to 240 m\/min<\/td><td>Suitable for fast-moving mobile equipment within the stated speed boundary<\/td><\/tr>\n <tr><td>Current carrying capacity<\/td><td>According to DIN VDE 0298, part 4<\/td><td>Ampacity must be confirmed against installation method and ambient conditions<\/td><\/tr>\n <tr><td>Oil resistance<\/td><td>According to DIN EN 60811-404<\/td><td>Suitable for industrial and crane environments exposed to oils and lubricants<\/td><\/tr>\n <tr><td>Weather resistance<\/td><td>Outdoor and indoor use; ozone, UV, moisture and cold resistant<\/td><td>Suitable for exposed outdoor terminals, cold climates and industrial sites<\/td><\/tr>\n <\/tbody>\n <\/table>\n <\/div>\n\n <div class=\"warning\">\n <h4>Mechanical warning<\/h4>\n <p><strong>Engineering warning:<\/strong> low-temperature operation increases the importance of reel geometry. Even if the cable compound is rated for -50\u00b0C movement, an undersized reel core, sharp roller, short S-type direction change or uncontrolled torsion can reduce cable life. The cable and the reeling system must be treated as one mechanical design.<\/p>\n <\/div>\n\n <div class=\"formula\">\n Mechanical Verification =\n Travel Speed + Dynamic Tensile Load + 20 N\/mm\u00b2 Tensile Rule + DIN VDE 0298-3 Bending Radius + Roller Churning + Torsion Protection + -50\u00b0C Flexibility\n <\/div>\n\n <div class=\"divider\" id=\"selection\"><span>VII<\/span><hr><span class=\"caption\">Selection framework<\/span><\/div>\n\n <h2>7. How to Select PROTOLON XPRT -50\u00b0C \/ PROTOLON XPRT-LWL -50\u00b0C<\/h2>\n\n <p>Selecting this family means verifying three systems together: the medium voltage electrical system, the cold mechanical reeling system and, if LWL is used, the fibre-optic communication system. Cross-section and voltage alone are not enough.<\/p>\n\n <div class=\"table-scroll medium\">\n <table>\n <thead>\n <tr>\n <th>Selection dimension<\/th>\n <th>Data to confirm<\/th>\n <th>Decision it drives<\/th>\n <\/tr>\n <\/thead>\n <tbody>\n <tr><td>Voltage class<\/td><td>3.6\/6, 6\/10, 8.7\/15 or 12\/20 kV system<\/td><td>Confirms rated voltage, operating voltage and AC test voltage requirement<\/td><\/tr>\n <tr><td>Low-temperature requirement<\/td><td>Minimum operating temperature and whether the cable moves at that temperature<\/td><td>Confirms need for the -50\u00b0C fully flexible version<\/td><\/tr>\n <tr><td>Machine type<\/td><td>Container crane, mobile machinery, mining equipment, outdoor dynamic equipment<\/td><td>Confirms whether high to extreme mechanical stress design is required<\/td><\/tr>\n <tr><td>Travel speed<\/td><td>Actual reeling speed and acceleration profile<\/td><td>Checked against reeling operation up to 240 m\/min<\/td><\/tr>\n <tr><td>Tensile load<\/td><td>Reel tension, cable weight, acceleration, braking and hanging length<\/td><td>Checked against 20 N\/mm\u00b2 tensile rule<\/td><\/tr>\n <tr><td>Bending geometry<\/td><td>Reel diameter, roller diameter, cable path and direction changes<\/td><td>Checked according to DIN VDE 0298, part 3<\/td><\/tr>\n <tr><td>LWL requirement<\/td><td>Fibre count, single-mode or multi-mode, communication architecture<\/td><td>Determines whether XPRT-LWL -50\u00b0C is required<\/td><\/tr>\n <tr><td>Environment<\/td><td>Oil, UV, ozone, moisture, cold temperature and outdoor exposure<\/td><td>Confirms PCP sheath and weather-resistant performance requirements<\/td><\/tr>\n <\/tbody>\n <\/table>\n <\/div>\n\n <h3>7.1 Power-only version vs LWL hybrid version<\/h3>\n\n <div class=\"table-scroll medium\">\n <table>\n <thead>\n <tr>\n <th>Comparison item<\/th>\n <th>PROTOLON XPRT -50\u00b0C<\/th>\n <th>PROTOLON XPRT-LWL -50\u00b0C<\/th>\n <th>Engineering reading<\/th>\n <\/tr>\n <\/thead>\n <tbody>\n <tr><td>Type designation<\/td><td>(N)TSCGEWOEU<\/td><td>(N)TSKCGEWOEU<\/td><td>LWL version uses the hybrid designation<\/td><\/tr>\n <tr><td>Cross-section concept<\/td><td>3C+3G, also + control or BUS<\/td><td>3C+2G+FO, also + control or BUS<\/td><td>One earth interstice is replaced by the fibre-optic element<\/td><\/tr>\n <tr><td>Data transmission<\/td><td>Power cable only unless separate data cable is used<\/td><td>Integrated fibre optics up to 24 fibres<\/td><td>LWL version reduces need for separate fibre reeling system<\/td><\/tr>\n <tr><td>Cold flexibility<\/td><td>Fully flexible operation down to -50\u00b0C<\/td><td>Fully flexible operation down to -50\u00b0C<\/td><td>Both versions are designed for extreme cold dynamic operation<\/td><\/tr>\n <tr><td>Typical project use<\/td><td>Medium voltage power supply for cold mobile equipment<\/td><td>Power and data supply for automated cold-region mobile equipment<\/td><td>Choose LWL when communication and control data must move with the power cable<\/td><\/tr>\n <\/tbody>\n <\/table>\n <\/div>\n\n <div class=\"divider\" id=\"faq\"><span>VIII<\/span><hr><span class=\"caption\">Engineer FAQ<\/span><\/div>\n\n <h2>8. Frequently Asked Engineering Questions<\/h2>\n\n <div class=\"qa\">\n <h4>Question 1 \u2014 What is PROTOLON XPRT -50\u00b0C?<\/h4>\n <p><strong>Answer:<\/strong> It is a cold-resistant flexible medium voltage reeling cable designed for high to extreme mechanical stress, with fully flexible operation from -50\u00b0C to +80\u00b0C. It is primarily intended for mobile equipment such as fast-moving container cranes and large dynamic machinery.<\/p>\n <\/div>\n\n <div class=\"qa\">\n <h4>Question 2 \u2014 What is the difference between XPRT -50\u00b0C and XPRT-LWL -50\u00b0C?<\/h4>\n <p><strong>Answer:<\/strong> XPRT -50\u00b0C is the power cable version with 3C+3G construction. XPRT-LWL -50\u00b0C is the hybrid version with 3C+2G+FO construction, integrating fibre optics for combined power and data transmission.<\/p>\n <\/div>\n\n <div class=\"qa\">\n <h4>Question 3 \u2014 Can the cable move at -50\u00b0C, or is -50\u00b0C only for storage?<\/h4>\n <p><strong>Answer:<\/strong> The provided data states ambient temperature in fully flexible operation from -50\u00b0C to +80\u00b0C. This means the cable is designed for dynamic movement, reeling and bending at -50\u00b0C when the system geometry and operating conditions are correct.<\/p>\n <\/div>\n\n <div class=\"qa\">\n <h4>Question 4 \u2014 What voltage classes are covered?<\/h4>\n <p><strong>Answer:<\/strong> The electrical data lists 3.6\/6 kV, 6\/10 kV, 8.7\/15 kV and 12\/20 kV, with AC test voltages of 11 kV, 17 kV, 24 kV and 29 kV respectively.<\/p>\n <\/div>\n\n <div class=\"qa\">\n <h4>Question 5 \u2014 What fibre types are available in the LWL version?<\/h4>\n <p><strong>Answer:<\/strong> The LWL version can integrate up to 24 optical fibres, with single-mode E9 or multi-mode G62.5 or G50 options, depending on the communication system design.<\/p>\n <\/div>\n\n <div class=\"qa\">\n <h4>Question 6 \u2014 What is the reeling speed limit?<\/h4>\n <p><strong>Answer:<\/strong> The supplied data states reeling operation up to 240 m\/min. For project selection, the actual acceleration, reel tension, roller path and low-temperature movement should also be checked.<\/p>\n <\/div>\n\n <div class=\"qa\">\n <h4>Question 7 \u2014 Why is the PCP sheath important?<\/h4>\n <p><strong>Answer:<\/strong> The inner and outer sheath are made of special PCP rubber compound better than 5GM5 for extreme cold conditions down to -50\u00b0C. This sheath system provides the low-temperature flexibility, abrasion resistance, tear resistance and weather durability needed in cold reeling duty.<\/p>\n <\/div>\n\n <div class=\"success\">\n <h4>Feichun Engineering View<\/h4>\n <p>PROTOLON XPRT -50\u00b0C and PROTOLON XPRT-LWL -50\u00b0C represent the cold-region version of high mechanical stress medium voltage reeling cable engineering. Their value lies in the combination of medium voltage operation, very finely stranded tinned class FS conductors, special EPR insulation for -50\u00b0C conditions, semiconductive field control, PCP sheath system better than 5GM5, polyester braid torsion protection, reeling speed up to 240 m\/min and fully flexible operation down to -50\u00b0C. For projects involving container cranes, large mobile machinery, cold outdoor ports, mining equipment or automation systems with optical communication, selection should verify voltage class, low-temperature movement, reel geometry, tensile force, bending radius, environmental exposure and LWL fibre requirements together.<\/p>\n <\/div>\n<\/main>\n“`\n\n <\/div>\n\n <footer>\n <div class=\"container\">\n <h4>Anhui Feichun Special Cable Co., Ltd. \u2014 Cold-Resistant Medium Voltage Reeling Cable Engineering for -50\u00b0C Dynamic Operation<\/h4>\n <p>Anhui Feichun Special Cable Co., Ltd. supports OEM manufacturers, port machinery suppliers, container crane manufacturers, cold-region terminal operators, mining machinery builders, large mobile equipment manufacturers and industrial users requiring PROTOLON XPRT -50\u00b0C type medium voltage reeling cables, PROTOLON XPRT-LWL -50\u00b0C type opto-power reeling cables, PCP sheathed cold-resistant crane cables and technical documentation for high to extreme mechanical stress applications.<\/p>\n <div class=\"contact\">\n <p><strong>Feichun Engineering Contact<\/strong><br>\n Telephone: +86 13855123218<br>\n Email: <a href=\"mailto:Tech@feichuncables.com\">Tech@feichuncables.com<\/a><\/p>\n <\/div>\n <p>Feichun supports customers requiring 3.6\/6kV, 6\/10kV, 8.7\/15kV and 12\/20kV cold-resistant medium voltage reeling cable solutions, fully flexible -50\u00b0C cable systems, integrated fibre-optic crane cable selection, gantry reeling operation cable systems, dynamic tensile force evaluation, moving bending radius calculation, torsion protection review and outdoor cold-weather cable engineering.<\/p>\n <div class=\"docid\">Document Reference: FEICHUN-PROTOLON-XPRT-50C-PROTOLON-XPRT-LWL-50C-MEDIUM-VOLTAGE-REELING-CABLE-EN-V1 \u00b7 PROTOLON XPRT -50\u00b0C \u00b7 PROTOLON XPRT-LWL -50\u00b0C \u00b7 (N)TSCGEWOEU \u00b7 (N)TSKCGEWOEU \u00b7 DIN VDE 0250-813 \u00b7 3.6\/6kV \u00b7 6\/10kV \u00b7 8.7\/15kV \u00b7 12\/20kV \u00b7 Fully Flexible Operation -50\u00b0C to +80\u00b0C \u00b7 EPR Cold Insulation \u00b7 PCP Sheath Better Than 5GM5 \u00b7 Polyester Braid \u00b7 20N\/mm\u00b2 Tensile Load \u00b7 Reeling Operation Up To 240m\/min \u00b7 Integrated Fibre Optics Up To 24 Fibres \u00b7 Feichun Engineering<\/div>\n <\/div>\n <\/footer>\n<\/body>\n<\/html>\n\n","protected":false},"excerpt":{"rendered":"PROTOLON XPRT -50\u00b0C and PROTOLON XPRT-LWL -50\u00b0C are flexible medium voltage reeling cables designed for high to extreme mechanical stress in very cold environments. The family covers multiple voltage classes from 3.6\/6 kV to 12\/20 kV, with the LWL version adding integrated fibre optics for combined power and data transmission. Its defining engineering value is not only medium voltage power supply, but reliable reeling, bending, torsion and dynamic tensile performance even in fully flexible operation down to -50\u00b0C.","protected":false},"author":1,"featured_media":11776,"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":[66],"tags":[16,17],"class_list":["post-17448","post","type-post","status-publish","format-standard","has-post-thumbnail","category-common-problems-encountered-in-cable-applications","tag-din-vde-0250","tag-reeling-cable","cs-entry"],"_links":{"self":[{"href":"https:\/\/feichuncables.com\/blog\/wp-json\/wp\/v2\/posts\/17448","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=17448"}],"version-history":[{"count":2,"href":"https:\/\/feichuncables.com\/blog\/wp-json\/wp\/v2\/posts\/17448\/revisions"}],"predecessor-version":[{"id":17451,"href":"https:\/\/feichuncables.com\/blog\/wp-json\/wp\/v2\/posts\/17448\/revisions\/17451"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/feichuncables.com\/blog\/wp-json\/wp\/v2\/media\/11776"}],"wp:attachment":[{"href":"https:\/\/feichuncables.com\/blog\/wp-json\/wp\/v2\/media?parent=17448"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/feichuncables.com\/blog\/wp-json\/wp\/v2\/categories?post=17448"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/feichuncables.com\/blog\/wp-json\/wp\/v2\/tags?post=17448"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}

{"id":17448,"date":"2026-06-10T10:38:28","date_gmt":"2026-06-10T02:38:28","guid":{"rendered":"https:\/\/feichuncables.com\/blog\/?p=17448"},"modified":"2026-06-10T10:38:32","modified_gmt":"2026-06-10T02:38:32","slug":"what-is-protolon-xprt-50c-protolon-xprt-lwl-50c-an-in-depth-engineering-analysis-of-the-cold-resistant-medium-voltage-reeling-cable","status":"publish","type":"post","link":"https:\/\/feichuncables.com\/blog\/what-is-protolon-xprt-50c-protolon-xprt-lwl-50c-an-in-depth-engineering-analysis-of-the-cold-resistant-medium-voltage-reeling-cable\/","title":{"rendered":"What is PROTOLON XPRT -50\u00b0C \/ PROTOLON XPRT-LWL -50\u00b0C: An In-Depth Engineering Analysis of the Cold-Resistant Medium Voltage Reeling Cable"},"content":{"rendered":"\n\n\n\n\n \n \n \n \n \n \n What is PROTOLON XPRT -50\u00b0C \/ PROTOLON XPRT-LWL -50\u00b0C: Cold-Resistant Medium Voltage Reeling Cable \u2014 In-Depth Engineering Analysis<\/title>\n\n <style>\n :root{\n --bg:#0b111a;\n --panel:#141f2f;\n 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<\/style>\n\n<\/head>\n<body>\n\n <section class=\"hero\">\n <div class=\"container\">\n <div class=\"badges\">\n <span class=\"badge b1\">PROTOLON XPRT -50\u00b0C<\/span>\n <span class=\"badge b2\">PROTOLON XPRT-LWL -50\u00b0C<\/span>\n <span class=\"badge b3\">(N)TSCGEWOEU \/ (N)TSKCGEWOEU<\/span>\n <span class=\"badge b4\">Medium Voltage Reeling Cable<\/span>\n <span class=\"badge b5\">Fully Flexible at -50\u00b0C<\/span>\n <\/div>\n <h1>What is PROTOLON XPRT -50\u00b0C \/ PROTOLON XPRT-LWL -50\u00b0C: An In-Depth Engineering Analysis of the Cold-Resistant Medium Voltage Reeling Cable<\/h1>\n <p>PROTOLON XPRT -50\u00b0C and PROTOLON XPRT-LWL -50\u00b0C are flexible medium voltage reeling cables designed for high to extreme mechanical stress in very cold environments. The family covers multiple voltage classes from 3.6\/6 kV to 12\/20 kV, with the LWL version adding integrated fibre optics for combined power and data transmission. Its defining engineering value is not only medium voltage power supply, but reliable reeling, bending, torsion and dynamic tensile performance even in fully flexible operation down to -50\u00b0C.<\/p>\n <div class=\"meta\">\n <span>\u2713 Medium voltage reeling cable<\/span>\n <span>\u2713 3.6\/6 kV, 6\/10 kV, 8.7\/15 kV, 12\/20 kV<\/span>\n <span>\u2713 Fully flexible operation down to -50\u00b0C<\/span>\n <span>\u2713 Optional LWL fibre optics up to 24 fibres<\/span>\n <span>\u2713 Reeling operation up to 240 m\/min<\/span>\n <\/div>\n\n“`\n <nav class=\"toc\">\n <a href=\"#definition\">Definition<\/a>\n <a href=\"#voltage\">Voltage Classes<\/a>\n <a href=\"#construction\">Construction<\/a>\n <a href=\"#cold\">-50\u00b0C Design<\/a>\n <a href=\"#lwl\">LWL Version<\/a>\n <a href=\"#mechanical\">Mechanical Data<\/a>\n <a href=\"#selection\">Selection<\/a>\n <a href=\"#faq\">FAQ<\/a>\n <\/nav>\n<\/div>\n“`\n\n <\/section>\n\n <div class=\"container\">\n <div class=\"cards\">\n <div class=\"card\"><div class=\"label\">Cold Flexibility<\/div><div class=\"value\">-50\u00b0C<\/div><div class=\"unit\">Fully flexible operation min. -50\u00b0C<\/div><\/div>\n <div class=\"card\"><div class=\"label\">Voltage Range<\/div><div class=\"value\">4<\/div><div class=\"unit\">3.6\/6, 6\/10, 8.7\/15 and 12\/20 kV classes<\/div><\/div>\n <div class=\"card\"><div class=\"label\">Travel Speed<\/div><div class=\"value\">240<\/div><div class=\"unit\">Reeling operation up to 240 m\/min<\/div><\/div>\n <div class=\"card\"><div class=\"label\">Fibre Optics<\/div><div class=\"value\">24<\/div><div class=\"unit\">Optional integration with up to 24 optical fibres<\/div><\/div>\n <div class=\"card\"><div class=\"label\">Conductor Temp.<\/div><div class=\"value\">90\u00b0C<\/div><div class=\"unit\">Maximum operating temperature of the conductor<\/div><\/div>\n <div class=\"card\"><div class=\"label\">Short Circuit<\/div><div class=\"value\">250\u00b0C<\/div><div class=\"unit\">Maximum short-circuit conductor temperature<\/div><\/div>\n <\/div>\n\n“`\n<main>\n <div class=\"divider\" id=\"definition\"><span>I<\/span><hr><span class=\"caption\">Definition and application<\/span><\/div>\n\n <h2>1. What is PROTOLON XPRT -50\u00b0C \/ PROTOLON XPRT-LWL -50\u00b0C?<\/h2>\n\n <p><strong>PROTOLON XPRT -50\u00b0C<\/strong> is a cold-resistant flexible medium voltage reeling cable for high to extreme mechanical stress. The standard power version uses the type designation <strong>(N)TSCGEWOEU<\/strong>. The fibre-optic hybrid version, <strong>PROTOLON XPRT-LWL -50\u00b0C<\/strong>, uses the LWL designation <strong>(N)TSKCGEWOEU<\/strong>.<\/p>\n\n <p>The family is based on <strong>DIN VDE 0250-813<\/strong> and is designed for mobile equipment such as fast-moving container cranes and other large dynamic machinery. It is intended for applications involving high travel speeds, dynamic tensile loads, frequent directional changes across multiple planes, churning over rollers and torsional forces.<\/p>\n\n <p>The decisive difference from standard medium voltage reeling cables is the cold-temperature design boundary: this family remains suitable for <strong>fully flexible operation down to -50\u00b0C<\/strong>. That makes it relevant for cold regions, winter port operations, mining machinery, Arctic and sub-Arctic outdoor terminals, and any project where a conventional flexible rubber cable may become too stiff under low-temperature movement.<\/p>\n\n <div class=\"note\">\n <h4>Technical thesis<\/h4>\n <p><strong>Engineering argument:<\/strong> PROTOLON XPRT -50\u00b0C is not simply a standard reeling cable with a lower storage temperature. The insulation, inner sheath and outer sheath are all based on special compounds for extreme cold conditions, while the cable still needs to survive dynamic reel tension, roller bending and torsion. The key engineering value is the combination of medium voltage electrical safety, high mechanical stress capability and fully flexible -50\u00b0C mobility in one cable system.<\/p>\n <\/div>\n\n <div class=\"table-scroll medium\">\n <table>\n <thead>\n <tr>\n <th>Product family<\/th>\n <th>Type designation<\/th>\n <th>Construction concept<\/th>\n <th>Primary engineering function<\/th>\n <\/tr>\n <\/thead>\n <tbody>\n <tr>\n <td>PROTOLON XPRT -50\u00b0C<\/td>\n <td>(N)TSCGEWOEU<\/td>\n <td>3C+3G, also with control or BUS options<\/td>\n <td>Cold-resistant medium voltage reeling power cable for dynamic machinery<\/td>\n <\/tr>\n <tr>\n <td>PROTOLON XPRT-LWL -50\u00b0C<\/td>\n <td>(N)TSKCGEWOEU<\/td>\n <td>LWL: 3C+2G+FO, also with control or BUS options<\/td>\n <td>Cold-resistant opto-power reeling cable for combined power and data transmission<\/td>\n <\/tr>\n <\/tbody>\n <\/table>\n <\/div>\n\n <div class=\"divider\" id=\"voltage\"><span>II<\/span><hr><span class=\"caption\">Electrical parameters and voltage classes<\/span><\/div>\n\n <h2>2. Electrical Parameters: From 3.6\/6 kV to 12\/20 kV<\/h2>\n\n <p>The -50\u00b0C family covers several medium voltage classes. The supplied electrical table lists <strong>3.6\/6 kV<\/strong>, <strong>6\/10 kV<\/strong>, <strong>8.7\/15 kV<\/strong> and <strong>12\/20 kV<\/strong>, with corresponding maximum permissible operating voltage and AC test voltage values.<\/p>\n\n <div class=\"table-scroll medium\">\n <table>\n <thead>\n <tr>\n <th>Rated voltage U0\/U [kV]<\/th>\n <th>Max. permissible operating voltage AC [kV]<\/th>\n <th>Max. permissible operating voltage DC [kV]<\/th>\n <th>AC test voltage [kV]<\/th>\n <th>Engineering interpretation<\/th>\n <\/tr>\n <\/thead>\n <tbody>\n <tr><td>3.6\/6<\/td><td>4.2\/7.2<\/td><td>\u2014<\/td><td>11<\/td><td>For 6 kV class mobile medium voltage supply systems<\/td><\/tr>\n <tr><td>6\/10<\/td><td>6.9\/12<\/td><td>\u2014<\/td><td>17<\/td><td>For 10 kV class reeling supply systems<\/td><\/tr>\n <tr><td>8.7\/15<\/td><td>10.4\/18<\/td><td>\u2014<\/td><td>24<\/td><td>For 15 kV class crane and mobile machinery systems<\/td><\/tr>\n <tr><td>12\/20<\/td><td>13.9\/24<\/td><td>\u2014<\/td><td>29<\/td><td>For 20 kV class large mobile equipment supply<\/td><\/tr>\n <\/tbody>\n <\/table>\n <\/div>\n\n <p>The product heading also references <strong>1.8\/3 kV \/ 3.6\/6 kV<\/strong> as part of the family positioning. The electrical parameter table provided here explicitly lists values from 3.6\/6 kV upward, so project documentation should confirm the exact electrical data if a 1.8\/3 kV version is requested.<\/p>\n\n <div class=\"warning\">\n <h4>Voltage selection warning<\/h4>\n <p><strong>Engineering warning:<\/strong> voltage class selection should not be based on the nominal system voltage alone. The engineer should also verify maximum permissible operating voltage, AC test voltage, termination system, cable outer diameter, reel geometry, moving bending radius and installation temperature. In cold reeling duty, electrical and mechanical verification are inseparable.<\/p>\n <\/div>\n\n <div class=\"divider\" id=\"construction\"><span>III<\/span><hr><span class=\"caption\">Cable construction<\/span><\/div>\n\n <h2>3. Construction Analysis: Conductors, EPR Insulation, Field Control, PCP Sheath and Polyester Braid<\/h2>\n\n <p>The cable construction follows the architecture of a high mechanical stress medium voltage reeling cable, but with compounds selected for extreme cold conditions. Both the power-only version and the LWL hybrid version are designed around flexible tinned copper conductors, EPR-based insulation, semiconductive field control and a special PCP sheath system for cold dynamic operation.<\/p>\n\n <div class=\"layer\">\n <div class=\"layer-title\">Layer 1 \u2014 Conductor: electrolytic copper tinned, very finely stranded, class FS<\/div>\n <div class=\"layer-text\">The conductor is made of tinned electrolytic copper with very fine stranding, class FS. Fine stranding supports repeated bending on reels and rollers, while tinning improves strand surface stability in outdoor, humid and industrial environments.<\/div>\n <\/div>\n\n <div class=\"layer\">\n <div class=\"layer-title\">Layer 2 \u2014 Insulation: special high-quality EPR compound for -50\u00b0C operation<\/div>\n <div class=\"layer-text\">The insulation is a special compound based on high-quality EPR for extreme cold conditions down to -50\u00b0C. This is the key electrical insulation layer and also a mechanical component that must remain elastic under low-temperature movement.<\/div>\n <\/div>\n\n <div class=\"layer\">\n <div class=\"layer-title\">Layer 3 \u2014 Electrical field control: inner and outer semiconductive layers<\/div>\n <div class=\"layer-text\">Inner and outer semiconductive layers control the medium voltage electric field around each core. In a moving reeling cable, these layers must retain both electrical interface quality and mechanical flexibility under repeated bending.<\/div>\n <\/div>\n\n <div class=\"layer\">\n <div class=\"layer-title\">Layer 4 \u2014 Core arrangement: three-core design with split earth conductors<\/div>\n <div class=\"layer-text\">The power-only version uses a three-core design with earth split into three interstices. This 3C+3G arrangement helps maintain a round cable shape and balanced bending behaviour in dynamic reel service.<\/div>\n <\/div>\n\n <div class=\"layer\">\n <div class=\"layer-title\">Layer 5 \u2014 LWL arrangement: three-core design with cradle separator, earth and FO element<\/div>\n <div class=\"layer-text\">The LWL version uses a three-core design with cradle separator, earth and fibre-optic element arranged in the interstices. In this version, the structure becomes 3C+2G+FO, enabling combined power and optical data transmission within one reeling cable.<\/div>\n <\/div>\n\n <div class=\"layer\">\n <div class=\"layer-title\">Layer 6 \u2014 Sheath system: special PCP rubber compound better than 5GM5<\/div>\n <div class=\"layer-text\">The inner sheath and outer sheath are made from a special PCP rubber compound, better than 5GM5, for extreme cold conditions down to -50\u00b0C. The sheath system provides abrasion resistance, tear resistance, environmental resistance and low-temperature flexibility.<\/div>\n <\/div>\n\n <div class=\"layer\">\n <div class=\"layer-title\">Layer 7 \u2014 Integrated reinforcement: polyester braid for torsion protection<\/div>\n <div class=\"layer-text\">An integrated polyester braid provides torsion protection. This reinforcement helps control cable twist, cross-section deformation and dynamic mechanical stress when the cable passes over rollers or changes direction across multiple planes.<\/div>\n <\/div>\n\n <div class=\"note\">\n <h4>Why the sheath system matters<\/h4>\n <p><strong>Engineering argument:<\/strong> at -50\u00b0C, the sheath is no longer just an abrasion layer. It becomes a decisive mechanical spring in the cable system. If the sheath hardens, the moving bending radius effectively increases, roller pressure rises, internal elements become overstressed and the cable loses dynamic life. The special PCP sheath system is therefore central to both cold flexibility and mechanical reliability.<\/p>\n <\/div>\n\n <div class=\"divider\" id=\"cold\"><span>IV<\/span><hr><span class=\"caption\">Cold-temperature engineering<\/span><\/div>\n\n <h2>4. -50\u00b0C Cold Flexibility: Why Fully Flexible Operation at -50\u00b0C is the Key Feature<\/h2>\n\n <p>Many cables can be stored or installed at low temperatures, but far fewer can operate dynamically at those temperatures. PROTOLON XPRT -50\u00b0C is specified with an ambient temperature range for <strong>fully flexible operation from -50\u00b0C to +80\u00b0C<\/strong>. That means the cable is intended to move, bend, reel and pass over rollers at -50\u00b0C, not merely remain stationary.<\/p>\n\n <div class=\"table-scroll\">\n <table>\n <thead>\n <tr>\n <th>Thermal parameter<\/th>\n <th>Value<\/th>\n <th>Engineering interpretation<\/th>\n <\/tr>\n <\/thead>\n <tbody>\n <tr><td>Maximum operating temperature of conductor<\/td><td>90\u00b0C<\/td><td>Continuous thermal limit of the conductor and insulation system<\/td><\/tr>\n <tr><td>Maximum short-circuit temperature of conductor<\/td><td>250\u00b0C<\/td><td>Short-time thermal withstand basis<\/td><\/tr>\n <tr><td>Ambient temperature for fixed installation<\/td><td>-50\u00b0C to +80\u00b0C<\/td><td>Suitable for static or fixed sections in extreme cold environments<\/td><\/tr>\n <tr><td>Ambient temperature in fully flexible operation<\/td><td>-50\u00b0C to +80\u00b0C<\/td><td>Suitable for dynamic reel, roller and moving operation at -50\u00b0C<\/td><\/tr>\n <\/tbody>\n <\/table>\n <\/div>\n\n <p>The distinction between fixed and fully flexible temperature is critical. A cable that survives fixed installation at -50\u00b0C may still be unsuitable for a moving reel at the same temperature. In this product family, both fixed and fully flexible minimum temperatures are stated as -50\u00b0C, which is the central engineering reason for choosing the -50\u00b0C version.<\/p>\n\n <div class=\"formula\">\n Cold Reeling Suitability =\n EPR Cold Insulation + PCP Cold Sheath + Very Fine Stranding + Polyester Anti-Torsion Braid + Correct Bending Radius + Controlled Reel Tension\n <\/div>\n\n <div class=\"divider\" id=\"lwl\"><span>V<\/span><hr><span class=\"caption\">LWL fibre-optic hybrid version<\/span><\/div>\n\n <h2>5. PROTOLON XPRT-LWL -50\u00b0C: Power and Data Transmission in One Cold-Resistant Reeling Cable<\/h2>\n\n <p>The LWL version is available with integrated fibre optics for combined transmission of power and data. The fibre-optic element can contain up to <strong>24 optical fibres<\/strong>, with single-mode E9 or multi-mode G62.5 or G50 options.<\/p>\n\n <p>This makes the LWL version relevant for advanced communication and control capabilities on container cranes, large mobile machinery and automation-heavy equipment. The same reeling cable can carry medium voltage power, protective earth and optical communication, reducing the need for a separate fibre-optic reel or cable route.<\/p>\n\n <div class=\"table-scroll\">\n <table>\n <thead>\n <tr>\n <th>Data transmission feature<\/th>\n <th>Available option<\/th>\n <th>Engineering meaning<\/th>\n <\/tr>\n <\/thead>\n <tbody>\n <tr><td>Maximum fibre count<\/td><td>Up to 24 fiber optics<\/td><td>Enough for redundant communication, control, monitoring and future spare channels<\/td><\/tr>\n <tr><td>Single-mode option<\/td><td>E9<\/td><td>Suitable for long-distance and high-bandwidth crane or terminal communication<\/td><\/tr>\n <tr><td>Multi-mode option<\/td><td>G62.5 or G50<\/td><td>Suitable for specific equipment networks and site communication architectures<\/td><\/tr>\n <tr><td>Hybrid structure<\/td><td>3C+2G+FO<\/td><td>Combines medium voltage power, protective earth and optical data in one cable<\/td><\/tr>\n <\/tbody>\n <\/table>\n <\/div>\n\n <div class=\"note\">\n <h4>Power + data under cold movement<\/h4>\n <p><strong>Engineering argument:<\/strong> in cold climates, running a separate fibre-optic reeling cable adds another moving system that must survive the same low-temperature bending, torsion and roller stress. The LWL hybrid approach consolidates power and data into one cable path, but it also makes correct reel design, bending radius and fibre termination especially important.<\/p>\n <\/div>\n\n <div class=\"divider\" id=\"mechanical\"><span>VI<\/span><hr><span class=\"caption\">Mechanical, chemical and environmental performance<\/span><\/div>\n\n <h2>6. Mechanical, Chemical and Environmental Parameters<\/h2>\n\n <p>The cable is designed for high to extreme mechanical stress, including high travel speeds, dynamic tensile loads, frequent directional changes across multiple planes, churning over rollers and torsional forces. The maximum tensile load on the conductor is <strong>20 N\/mm\u00b2<\/strong>, bending radii follow <strong>DIN VDE 0298, part 3<\/strong>, and reeling operation is specified up to <strong>240 m\/min<\/strong>.<\/p>\n\n <div class=\"table-scroll medium\">\n <table>\n <thead>\n <tr>\n <th>Parameter group<\/th>\n <th>Value \/ reference<\/th>\n <th>Engineering interpretation<\/th>\n <\/tr>\n <\/thead>\n <tbody>\n <tr><td>Max. tensile load on conductor<\/td><td>20 N\/mm\u00b2<\/td><td>Primary tensile verification value for the conductor system<\/td><\/tr>\n <tr><td>Bending radii min.<\/td><td>According to DIN VDE 0298, part 3<\/td><td>Reel, roller and fixed route geometry must follow the applicable bending rules<\/td><\/tr>\n <tr><td>Travel speed<\/td><td>Reeling operation up to 240 m\/min<\/td><td>Suitable for fast-moving mobile equipment within the stated speed boundary<\/td><\/tr>\n <tr><td>Current carrying capacity<\/td><td>According to DIN VDE 0298, part 4<\/td><td>Ampacity must be confirmed against installation method and ambient conditions<\/td><\/tr>\n <tr><td>Oil resistance<\/td><td>According to DIN EN 60811-404<\/td><td>Suitable for industrial and crane environments exposed to oils and lubricants<\/td><\/tr>\n <tr><td>Weather resistance<\/td><td>Outdoor and indoor use; ozone, UV, moisture and cold resistant<\/td><td>Suitable for exposed outdoor terminals, cold climates and industrial sites<\/td><\/tr>\n <\/tbody>\n <\/table>\n <\/div>\n\n <div class=\"warning\">\n <h4>Mechanical warning<\/h4>\n <p><strong>Engineering warning:<\/strong> low-temperature operation increases the importance of reel geometry. Even if the cable compound is rated for -50\u00b0C movement, an undersized reel core, sharp roller, short S-type direction change or uncontrolled torsion can reduce cable life. The cable and the reeling system must be treated as one mechanical design.<\/p>\n <\/div>\n\n <div class=\"formula\">\n Mechanical Verification =\n Travel Speed + Dynamic Tensile Load + 20 N\/mm\u00b2 Tensile Rule + DIN VDE 0298-3 Bending Radius + Roller Churning + Torsion Protection + -50\u00b0C Flexibility\n <\/div>\n\n <div class=\"divider\" id=\"selection\"><span>VII<\/span><hr><span class=\"caption\">Selection framework<\/span><\/div>\n\n <h2>7. How to Select PROTOLON XPRT -50\u00b0C \/ PROTOLON XPRT-LWL -50\u00b0C<\/h2>\n\n <p>Selecting this family means verifying three systems together: the medium voltage electrical system, the cold mechanical reeling system and, if LWL is used, the fibre-optic communication system. Cross-section and voltage alone are not enough.<\/p>\n\n <div class=\"table-scroll medium\">\n <table>\n <thead>\n <tr>\n <th>Selection dimension<\/th>\n <th>Data to confirm<\/th>\n <th>Decision it drives<\/th>\n <\/tr>\n <\/thead>\n <tbody>\n <tr><td>Voltage class<\/td><td>3.6\/6, 6\/10, 8.7\/15 or 12\/20 kV system<\/td><td>Confirms rated voltage, operating voltage and AC test voltage requirement<\/td><\/tr>\n <tr><td>Low-temperature requirement<\/td><td>Minimum operating temperature and whether the cable moves at that temperature<\/td><td>Confirms need for the -50\u00b0C fully flexible version<\/td><\/tr>\n <tr><td>Machine type<\/td><td>Container crane, mobile machinery, mining equipment, outdoor dynamic equipment<\/td><td>Confirms whether high to extreme mechanical stress design is required<\/td><\/tr>\n <tr><td>Travel speed<\/td><td>Actual reeling speed and acceleration profile<\/td><td>Checked against reeling operation up to 240 m\/min<\/td><\/tr>\n <tr><td>Tensile load<\/td><td>Reel tension, cable weight, acceleration, braking and hanging length<\/td><td>Checked against 20 N\/mm\u00b2 tensile rule<\/td><\/tr>\n <tr><td>Bending geometry<\/td><td>Reel diameter, roller diameter, cable path and direction changes<\/td><td>Checked according to DIN VDE 0298, part 3<\/td><\/tr>\n <tr><td>LWL requirement<\/td><td>Fibre count, single-mode or multi-mode, communication architecture<\/td><td>Determines whether XPRT-LWL -50\u00b0C is required<\/td><\/tr>\n <tr><td>Environment<\/td><td>Oil, UV, ozone, moisture, cold temperature and outdoor exposure<\/td><td>Confirms PCP sheath and weather-resistant performance requirements<\/td><\/tr>\n <\/tbody>\n <\/table>\n <\/div>\n\n <h3>7.1 Power-only version vs LWL hybrid version<\/h3>\n\n <div class=\"table-scroll medium\">\n <table>\n <thead>\n <tr>\n <th>Comparison item<\/th>\n <th>PROTOLON XPRT -50\u00b0C<\/th>\n <th>PROTOLON XPRT-LWL -50\u00b0C<\/th>\n <th>Engineering reading<\/th>\n <\/tr>\n <\/thead>\n <tbody>\n <tr><td>Type designation<\/td><td>(N)TSCGEWOEU<\/td><td>(N)TSKCGEWOEU<\/td><td>LWL version uses the hybrid designation<\/td><\/tr>\n <tr><td>Cross-section concept<\/td><td>3C+3G, also + control or BUS<\/td><td>3C+2G+FO, also + control or BUS<\/td><td>One earth interstice is replaced by the fibre-optic element<\/td><\/tr>\n <tr><td>Data transmission<\/td><td>Power cable only unless separate data cable is used<\/td><td>Integrated fibre optics up to 24 fibres<\/td><td>LWL version reduces need for separate fibre reeling system<\/td><\/tr>\n <tr><td>Cold flexibility<\/td><td>Fully flexible operation down to -50\u00b0C<\/td><td>Fully flexible operation down to -50\u00b0C<\/td><td>Both versions are designed for extreme cold dynamic operation<\/td><\/tr>\n <tr><td>Typical project use<\/td><td>Medium voltage power supply for cold mobile equipment<\/td><td>Power and data supply for automated cold-region mobile equipment<\/td><td>Choose LWL when communication and control data must move with the power cable<\/td><\/tr>\n <\/tbody>\n <\/table>\n <\/div>\n\n <div class=\"divider\" id=\"faq\"><span>VIII<\/span><hr><span class=\"caption\">Engineer FAQ<\/span><\/div>\n\n <h2>8. Frequently Asked Engineering Questions<\/h2>\n\n <div class=\"qa\">\n <h4>Question 1 \u2014 What is PROTOLON XPRT -50\u00b0C?<\/h4>\n <p><strong>Answer:<\/strong> It is a cold-resistant flexible medium voltage reeling cable designed for high to extreme mechanical stress, with fully flexible operation from -50\u00b0C to +80\u00b0C. It is primarily intended for mobile equipment such as fast-moving container cranes and large dynamic machinery.<\/p>\n <\/div>\n\n <div class=\"qa\">\n <h4>Question 2 \u2014 What is the difference between XPRT -50\u00b0C and XPRT-LWL -50\u00b0C?<\/h4>\n <p><strong>Answer:<\/strong> XPRT -50\u00b0C is the power cable version with 3C+3G construction. XPRT-LWL -50\u00b0C is the hybrid version with 3C+2G+FO construction, integrating fibre optics for combined power and data transmission.<\/p>\n <\/div>\n\n <div class=\"qa\">\n <h4>Question 3 \u2014 Can the cable move at -50\u00b0C, or is -50\u00b0C only for storage?<\/h4>\n <p><strong>Answer:<\/strong> The provided data states ambient temperature in fully flexible operation from -50\u00b0C to +80\u00b0C. This means the cable is designed for dynamic movement, reeling and bending at -50\u00b0C when the system geometry and operating conditions are correct.<\/p>\n <\/div>\n\n <div class=\"qa\">\n <h4>Question 4 \u2014 What voltage classes are covered?<\/h4>\n <p><strong>Answer:<\/strong> The electrical data lists 3.6\/6 kV, 6\/10 kV, 8.7\/15 kV and 12\/20 kV, with AC test voltages of 11 kV, 17 kV, 24 kV and 29 kV respectively.<\/p>\n <\/div>\n\n <div class=\"qa\">\n <h4>Question 5 \u2014 What fibre types are available in the LWL version?<\/h4>\n <p><strong>Answer:<\/strong> The LWL version can integrate up to 24 optical fibres, with single-mode E9 or multi-mode G62.5 or G50 options, depending on the communication system design.<\/p>\n <\/div>\n\n <div class=\"qa\">\n <h4>Question 6 \u2014 What is the reeling speed limit?<\/h4>\n <p><strong>Answer:<\/strong> The supplied data states reeling operation up to 240 m\/min. For project selection, the actual acceleration, reel tension, roller path and low-temperature movement should also be checked.<\/p>\n <\/div>\n\n <div class=\"qa\">\n <h4>Question 7 \u2014 Why is the PCP sheath important?<\/h4>\n <p><strong>Answer:<\/strong> The inner and outer sheath are made of special PCP rubber compound better than 5GM5 for extreme cold conditions down to -50\u00b0C. This sheath system provides the low-temperature flexibility, abrasion resistance, tear resistance and weather durability needed in cold reeling duty.<\/p>\n <\/div>\n\n <div class=\"success\">\n <h4>Feichun Engineering View<\/h4>\n <p>PROTOLON XPRT -50\u00b0C and PROTOLON XPRT-LWL -50\u00b0C represent the cold-region version of high mechanical stress medium voltage reeling cable engineering. Their value lies in the combination of medium voltage operation, very finely stranded tinned class FS conductors, special EPR insulation for -50\u00b0C conditions, semiconductive field control, PCP sheath system better than 5GM5, polyester braid torsion protection, reeling speed up to 240 m\/min and fully flexible operation down to -50\u00b0C. For projects involving container cranes, large mobile machinery, cold outdoor ports, mining equipment or automation systems with optical communication, selection should verify voltage class, low-temperature movement, reel geometry, tensile force, bending radius, environmental exposure and LWL fibre requirements together.<\/p>\n <\/div>\n<\/main>\n“`\n\n <\/div>\n\n <footer>\n <div class=\"container\">\n <h4>Anhui Feichun Special Cable Co., Ltd. \u2014 Cold-Resistant Medium Voltage Reeling Cable Engineering for -50\u00b0C Dynamic Operation<\/h4>\n <p>Anhui Feichun Special Cable Co., Ltd. supports OEM manufacturers, port machinery suppliers, container crane manufacturers, cold-region terminal operators, mining machinery builders, large mobile equipment manufacturers and industrial users requiring PROTOLON XPRT -50\u00b0C type medium voltage reeling cables, PROTOLON XPRT-LWL -50\u00b0C type opto-power reeling cables, PCP sheathed cold-resistant crane cables and technical documentation for high to extreme mechanical stress applications.<\/p>\n <div class=\"contact\">\n <p><strong>Feichun Engineering Contact<\/strong><br>\n Telephone: +86 13855123218<br>\n Email: <a href=\"mailto:Tech@feichuncables.com\">Tech@feichuncables.com<\/a><\/p>\n <\/div>\n <p>Feichun supports customers requiring 3.6\/6kV, 6\/10kV, 8.7\/15kV and 12\/20kV cold-resistant medium voltage reeling cable solutions, fully flexible -50\u00b0C cable systems, integrated fibre-optic crane cable selection, gantry reeling operation cable systems, dynamic tensile force evaluation, moving bending radius calculation, torsion protection review and outdoor cold-weather cable engineering.<\/p>\n <div class=\"docid\">Document Reference: FEICHUN-PROTOLON-XPRT-50C-PROTOLON-XPRT-LWL-50C-MEDIUM-VOLTAGE-REELING-CABLE-EN-V1 \u00b7 PROTOLON XPRT -50\u00b0C \u00b7 PROTOLON XPRT-LWL -50\u00b0C \u00b7 (N)TSCGEWOEU \u00b7 (N)TSKCGEWOEU \u00b7 DIN VDE 0250-813 \u00b7 3.6\/6kV \u00b7 6\/10kV \u00b7 8.7\/15kV \u00b7 12\/20kV \u00b7 Fully Flexible Operation -50\u00b0C to +80\u00b0C \u00b7 EPR Cold Insulation \u00b7 PCP Sheath Better Than 5GM5 \u00b7 Polyester Braid \u00b7 20N\/mm\u00b2 Tensile Load \u00b7 Reeling Operation Up To 240m\/min \u00b7 Integrated Fibre Optics Up To 24 Fibres \u00b7 Feichun Engineering<\/div>\n <\/div>\n <\/footer>\n<\/body>\n<\/html>\n\n","protected":false},"excerpt":{"rendered":"PROTOLON XPRT -50\u00b0C and PROTOLON XPRT-LWL -50\u00b0C are flexible medium voltage reeling cables designed for high to extreme mechanical stress in very cold environments. The family covers multiple voltage classes from 3.6\/6 kV to 12\/20 kV, with the LWL version adding integrated fibre optics for combined power and data transmission. Its defining engineering value is not only medium voltage power supply, but reliable reeling, bending, torsion and dynamic tensile performance even in fully flexible operation down to -50\u00b0C.","protected":false},"author":1,"featured_media":11776,"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":[66],"tags":[16,17],"class_list":["post-17448","post","type-post","status-publish","format-standard","has-post-thumbnail","category-common-problems-encountered-in-cable-applications","tag-din-vde-0250","tag-reeling-cable","cs-entry"],"_links":{"self":[{"href":"https:\/\/feichuncables.com\/blog\/wp-json\/wp\/v2\/posts\/17448","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=17448"}],"version-history":[{"count":2,"href":"https:\/\/feichuncables.com\/blog\/wp-json\/wp\/v2\/posts\/17448\/revisions"}],"predecessor-version":[{"id":17451,"href":"https:\/\/feichuncables.com\/blog\/wp-json\/wp\/v2\/posts\/17448\/revisions\/17451"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/feichuncables.com\/blog\/wp-json\/wp\/v2\/media\/11776"}],"wp:attachment":[{"href":"https:\/\/feichuncables.com\/blog\/wp-json\/wp\/v2\/media?parent=17448"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/feichuncables.com\/blog\/wp-json\/wp\/v2\/categories?post=17448"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/feichuncables.com\/blog\/wp-json\/wp\/v2\/tags?post=17448"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}