{"id":24301,"date":"2026-07-24T13:36:18","date_gmt":"2026-07-24T05:36:18","guid":{"rendered":"https:\/\/feichuncables.com\/blog\/?p=24301"},"modified":"2026-07-24T13:36:22","modified_gmt":"2026-07-24T05:36:22","slug":"protolon-m-r-ntscgewoeu-lwl-arctic-50c-36-6-%d0%ba%d0%b2-%d0%bd%d0%b8%d0%b7%d0%ba%d0%be%d1%82%d0%b5%d0%bc%d0%bf%d0%b5%d1%80%d0%b0%d1%82%d1%83%d1%80%d0%bd%d1%8b%d0%b9-%d1%8d%d0%bb%d0%b5","status":"publish","type":"post","link":"https:\/\/feichuncables.com\/blog\/protolon-m-r-ntscgewoeu-lwl-arctic-50c-36-6-%d0%ba%d0%b2-%d0%bd%d0%b8%d0%b7%d0%ba%d0%be%d1%82%d0%b5%d0%bc%d0%bf%d0%b5%d1%80%d0%b0%d1%82%d1%83%d1%80%d0%bd%d1%8b%d0%b9-%d1%8d%d0%bb%d0%b5\/","title":{"rendered":"PROTOLON (M) R-(N)TSCGEWOEU LWL Arctic-50C 3,6\/6 \u043a\u0412 \u2014 \u043d\u0438\u0437\u043a\u043e\u0442\u0435\u043c\u043f\u0435\u0440\u0430\u0442\u0443\u0440\u043d\u044b\u0439 \u044d\u043b\u0435\u043a\u0442\u0440\u043e\u043e\u043f\u0442\u0438\u0447\u0435\u0441\u043a\u0438\u0439 upgrade"},"content":{"rendered":"\n<figure class=\"wp-block-image size-large\"><img data-dominant-color=\"25333d\" data-has-transparency=\"false\" style=\"--dominant-color: #25333d;\" loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"564\" sizes=\"auto, (max-width: 1200px) 100vw, 1200px\" src=\"https:\/\/feichuncables.com\/blog\/wp-content\/uploads\/image-1714-1200x564.avif\" alt=\"\" class=\"wp-image-24302 not-transparent\" title=\"\" srcset=\"https:\/\/feichuncables.com\/blog\/wp-content\/uploads\/image-1714-1200x564.avif 1200w, https:\/\/feichuncables.com\/blog\/wp-content\/uploads\/image-1714-300x141.avif 300w, https:\/\/feichuncables.com\/blog\/wp-content\/uploads\/image-1714-768x361.avif 768w, https:\/\/feichuncables.com\/blog\/wp-content\/uploads\/image-1714-400x188.avif 400w, https:\/\/feichuncables.com\/blog\/wp-content\/uploads\/image-1714-800x376.avif 800w, https:\/\/feichuncables.com\/blog\/wp-content\/uploads\/image-1714-832x391.avif 832w, https:\/\/feichuncables.com\/blog\/wp-content\/uploads\/image-1714-1248x586.avif 1248w, https:\/\/feichuncables.com\/blog\/wp-content\/uploads\/image-1714.avif 1530w\" \/><\/figure>\n\n\n\n\n<!DOCTYPE html><html lang=\"ru\"><head><meta charset=\"UTF-8\"><meta name=\"viewport\" content=\"width=device-width,initial-scale=1\"><title>PROTOLON (M) R-(N)TSCGEWOEU LWL Arctic-50C 3,6\/6 \u043a\u0412<\/title><meta name=\"description\" content=\"Arctic-50C LWL 3,6\/6 \u043a\u0412: \u221250 \u00b0C flexible, 6\u201324 fibers, G62,5\/G50\/E9, OTDR, split earth and cold-soak engineering.\"><style>\n:root{--bg:#061018;--panel:#0e1c27;--panel2:#142938;--ink:#f3f8fb;--muted:#adc4d2;--line:#315365;--ice:#8ee9ff;--blue:#54b8ff;--cyan:#44ded7;--gold:#f1c84d;--violet:#b69cff;--green:#6ee58a;--red:#ff6961;--orange:#f49a3d}\n*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font-family:Arial,'Segoe UI',sans-serif;line-height:1.72}.container{max-width:1400px;margin:auto;padding:0 24px}a{color:var(--ice)}.hero{padding:60px 0;background:radial-gradient(circle at 12% 8%,rgba(142,233,255,.28),transparent 34%),radial-gradient(circle at 82% 14%,rgba(182,156,255,.20),transparent 30%),linear-gradient(135deg,#061018,#0e2634);border-bottom:1px solid var(--line)}h1{font-size:42px;line-height:1.16;margin:20px 0}h2{margin-top:48px;border-left:6px solid var(--ice);padding-left:14px}h3,h4{color:var(--ice)}.sub{font-size:20px;color:#d9edf7}.badges,.meta{display:flex;gap:10px;flex-wrap:wrap}.badge,.meta span{border:1px solid var(--line);background:#07151e;border-radius:22px;padding:8px 13px;font-weight:800}.cards,.spec-grid,.advice-grid,.cert-grid,.fmea-grid,.protocol-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:16px;margin:24px 0}.card,.spec,.advice,.cert,.note,.warn,.layer,.fmea,.protocol{background:var(--panel);border:1px solid var(--line);border-radius:9px;padding:18px}.card{border-top:4px solid var(--ice)}.value{font-size:29px;font-weight:900;color:var(--ice)}.label,.spec span:first-child{color:var(--muted)}.toc{background:var(--panel);border:1px solid var(--line);border-left:7px solid var(--ice);border-radius:9px;padding:20px;margin:28px 0}.toc ol{columns:2}.truth{background:linear-gradient(120deg,rgba(142,233,255,.15),rgba(182,156,255,.11));border:1px solid var(--line);border-left:7px solid var(--ice);padding:20px;border-radius:9px}.warn{border-left:7px solid var(--red)}.advice{border-left:5px solid var(--blue)}.cert{border-left:5px solid var(--ice)}.fmea{border-left:5px solid var(--red)}.protocol{border-top:5px solid var(--cyan)}.table-scroll{overflow:auto;border:1px solid var(--line);border-radius:8px;margin:18px 0}table{width:100%;border-collapse:collapse;background:#07151e}th,td{border:1px solid var(--line);padding:9px;vertical-align:top}th{background:var(--panel2);color:#e4f5ff}td:first-child{color:var(--ice);font-weight:700}.formula{white-space:pre-line;background:#07151e;border:1px solid var(--line);padding:18px;border-radius:9px}.svg-wrap{background:#07151e;border:1px solid var(--line);padding:14px;margin:22px 0}.caption{text-align:center;color:#9bb8c6}.contact{display:grid;grid-template-columns:1fr 1fr;gap:14px}.contact div{background:#07151e;border:1px solid var(--line);padding:15px;border-radius:7px}.checklist li{margin-bottom:8px}footer{margin-top:48px;background:#030a0f;padding:34px 0}.small{font-size:12px;color:#90a8b4}@media(max-width:760px){h1{font-size:30px}.toc ol{columns:1}.contact{grid-template-columns:1fr}}\n<\/style><script type=\"application\/ld+json\">{\"@context\": \"https:\/\/schema.org\", \"@type\": \"TechArticle\", \"headline\": \"PROTOLON (M) R-(N)TSCGEWOEU LWL Arctic-50C 3,6\/6 \u043a\u0412\", \"author\": {\"@type\": \"Organization\", \"name\": \"Feichun Cable\"}}<\/script><\/head><body>\n<section class=\"hero\"><div class=\"container\"><div class=\"badges\"><span class=\"badge\">PROTOLON (M) R<\/span><span class=\"badge\">(N)TSCGEWOEU LWL Arctic-50C<\/span><span class=\"badge\">3,6\/6 (7,2) \u043a\u0412<\/span><span class=\"badge\">\u221250 \u00b0C flexible<\/span><span class=\"badge\">6\u201324 fibers<\/span><span class=\"badge\">G62,5 \/ G50 \/ E9<\/span><\/div><h1>PROTOLON (M) R-(N)TSCGEWOEU LWL Arctic-50C 3,6\/6 \u043a\u0412 \u2014 \u043d\u0438\u0437\u043a\u043e\u0442\u0435\u043c\u043f\u0435\u0440\u0430\u0442\u0443\u0440\u043d\u044b\u0439 \u044d\u043b\u0435\u043a\u0442\u0440\u043e\u043e\u043f\u0442\u0438\u0447\u0435\u0441\u043a\u0438\u0439 upgrade<\/h1><div class=\"sub\">\u0421\u0438\u043b\u043e\u0432\u0430\u044f \u043f\u0435\u0440\u0435\u0434\u0430\u0447\u0430, split earth \u0438 \u043e\u043f\u0442\u0438\u0447\u0435\u0441\u043a\u0430\u044f \u0441\u0432\u044f\u0437\u044c \u0432 \u043e\u0434\u043d\u043e\u043c \u0433\u0438\u0431\u043a\u043e\u043c \u0431\u0430\u0440\u0430\u0431\u0430\u043d\u043d\u043e\u043c \u043a\u0430\u0431\u0435\u043b\u0435.<\/div><p>\u041a\u0430\u0431\u0435\u043b\u044c \u043e\u0431\u044a\u0435\u0434\u0438\u043d\u044f\u0435\u0442 \u0442\u0440\u0438 \u0441\u0438\u043b\u043e\u0432\u044b\u0435 \u0436\u0438\u043b\u044b, \u0434\u0432\u0435 \u0447\u0430\u0441\u0442\u0438 \u0437\u0430\u0449\u0438\u0442\u043d\u043e\u0433\u043e \u043f\u0440\u043e\u0432\u043e\u0434\u043d\u0438\u043a\u0430 \u0438 LWL-\u044d\u043b\u0435\u043c\u0435\u043d\u0442 \u0438\u0437 \u0448\u0435\u0441\u0442\u0438 \u0442\u0440\u0443\u0431\u043e\u043a \u0432\u043e\u043a\u0440\u0443\u0433 \u0446\u0435\u043d\u0442\u0440\u0430\u043b\u044c\u043d\u043e\u0439 \u043e\u043f\u043e\u0440\u044b. \u0412 \u043a\u0430\u0436\u0434\u043e\u0439 \u0442\u0440\u0443\u0431\u043a\u0435 \u0440\u0430\u0437\u043c\u0435\u0449\u0430\u0435\u0442\u0441\u044f \u043e\u0442 \u043e\u0434\u043d\u043e\u0433\u043e \u0434\u043e \u0447\u0435\u0442\u044b\u0440\u0435\u0445 \u0432\u043e\u043b\u043e\u043a\u043e\u043d, \u043f\u043e\u044d\u0442\u043e\u043c\u0443 \u0434\u043e\u0441\u0442\u0443\u043f\u043d\u044b 6, 12, 18 \u0438\u043b\u0438 24 fibers.<\/p><p>Fully flexible operation \u0434\u043e \u221250 \u00b0C \u0442\u0440\u0435\u0431\u0443\u0435\u0442 \u0434\u0432\u043e\u0439\u043d\u043e\u0439 \u043f\u0440\u0438\u0435\u043c\u043a\u0438: \u044d\u043b\u0435\u043a\u0442\u0440\u0438\u0447\u0435\u0441\u043a\u043e\u0439 \u0438 \u043e\u043f\u0442\u0438\u0447\u0435\u0441\u043a\u043e\u0439. \u041a\u0430\u0431\u0435\u043b\u044c \u0434\u043e\u043b\u0436\u0435\u043d \u0432\u044b\u0434\u0435\u0440\u0436\u0438\u0432\u0430\u0442\u044c \u0445\u043e\u043b\u043e\u0434\u043d\u044b\u0439 \u0438\u0437\u0433\u0438\u0431, \u0430 \u043e\u043f\u0442\u0438\u0447\u0435\u0441\u043a\u0430\u044f \u0442\u0440\u0430\u0441\u0441\u0430 \u2014 \u0441\u043e\u0445\u0440\u0430\u043d\u044f\u0442\u044c \u0441\u0442\u0430\u0431\u0438\u043b\u044c\u043d\u043e\u0441\u0442\u044c \u043f\u043e\u0441\u043b\u0435 cold-soak, \u043d\u0430\u043c\u043e\u0442\u043a\u0438 \u0438 \u0442\u0435\u0440\u043c\u043e\u0446\u0438\u043a\u043b\u043e\u0432.<\/p><div class=\"meta\"><span>3,6\/6 (7,2) \u043a\u0412<\/span><span>6 000 \u0412<\/span><span>11 \u043a\u0412 test<\/span><span>\u221250\u2026+80 \u00b0C flexible<\/span><span>6\u201324 fibers<\/span><span>\u0434\u043e 120 \u043c\/\u043c\u0438\u043d<\/span><\/div><\/div><\/section>\n<div class=\"container\"><div class=\"cards\"><div class=\"card\"><div class=\"label\">\u041c\u0438\u043d\u0438\u043c\u0430\u043b\u044c\u043d\u0430\u044f \u0442\u0435\u043c\u043f\u0435\u0440\u0430\u0442\u0443\u0440\u0430<\/div><div class=\"value\">\u221250 \u00b0C<\/div><\/div><div class=\"card\"><div class=\"label\">\u041e\u043f\u0442\u0438\u0447\u0435\u0441\u043a\u0438\u0435 \u0432\u043e\u043b\u043e\u043a\u043d\u0430<\/div><div class=\"value\">6\u201324<\/div><\/div><div class=\"card\"><div class=\"label\">Fiber types<\/div><div class=\"value\">3<\/div><div>G62,5 \u00b7 G50 \u00b7 E9<\/div><\/div><div class=\"card\"><div class=\"label\">\u0422\u0438\u043f\u043e\u0440\u0430\u0437\u043c\u0435\u0440\u044b<\/div><div class=\"value\">9<\/div><\/div><\/div>\n<div class=\"toc\"><h3>\u0421\u043e\u0434\u0435\u0440\u0436\u0430\u043d\u0438\u0435<\/h3><ol><li>Electro-optical concept<\/li><li>Construction<\/li><li>Fiber selection<\/li><li>OTDR<\/li><li>Cold-soak<\/li><li>Drum geometry<\/li><li>Ice loading<\/li><li>Electrical calculations<\/li><li>FMEA<\/li><li>Acceptance<\/li><\/ol><\/div>\n<h2>1. \u0418\u043d\u0442\u0435\u0433\u0440\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u0430\u044f \u044d\u043b\u0435\u043a\u0442\u0440\u043e\u043e\u043f\u0442\u0438\u0447\u0435\u0441\u043a\u0430\u044f \u0441\u0438\u0441\u0442\u0435\u043c\u0430<\/h2><div class=\"svg-wrap\"><svg viewBox=\"0 0 1200 600\"><rect width=\"1200\" height=\"600\" fill=\"#061018\"\/><rect x=\"30\" y=\"30\" width=\"1140\" height=\"540\" fill=\"#0e1c27\" stroke=\"#315365\"\/><text x=\"55\" y=\"72\" fill=\"#8ee9ff\" font-size=\"22\" font-family=\"Arial\" font-weight=\"900\">Arctic-50C LWL: power + PE + optical data in one reeling cable<\/text><circle cx=\"270\" cy=\"300\" r=\"135\" fill=\"#07151e\" stroke=\"#8ee9ff\" stroke-width=\"15\"\/><circle cx=\"270\" cy=\"300\" r=\"58\" fill=\"#0e1c27\" stroke=\"#607d8b\" stroke-width=\"8\"\/><path d=\"M377 250 C515 188 665 215 790 282 S960 370 1115 315\" fill=\"none\" stroke=\"#8ee9ff\" stroke-width=\"24\"\/><path d=\"M377 288 C520 228 660 252 785 318 S960 408 1115 350\" fill=\"none\" stroke=\"#54b8ff\" stroke-width=\"15\"\/><path d=\"M377 268 C520 208 665 234 790 300 S960 389 1115 333\" fill=\"none\" stroke=\"#b69cff\" stroke-width=\"5\" stroke-dasharray=\"10 8\"\/><text x=\"68\" y=\"475\" fill=\"#d9edf7\" font-size=\"17\" font-family=\"Arial\">3,6\/6 \u043a\u0412 \u00b7 \u221250\u2026+80 \u00b0C flexible \u00b7 6\/12\/18\/24 fibers \u00b7 G62,5 \/ G50 \/ E9<\/text><text x=\"68\" y=\"515\" fill=\"#8ee9ff\" font-size=\"16\" font-family=\"Arial\" font-weight=\"900\">RPE \u0438 OTDR \u0434\u043e\u043b\u0436\u043d\u044b \u0430\u043d\u0430\u043b\u0438\u0437\u0438\u0440\u043e\u0432\u0430\u0442\u044c\u0441\u044f \u043a\u0430\u043a \u0434\u0432\u0435 \u043d\u0435\u0437\u0430\u0432\u0438\u0441\u0438\u043c\u044b\u0435, \u043d\u043e \u043c\u0435\u0445\u0430\u043d\u0438\u0447\u0435\u0441\u043a\u0438 \u0441\u0432\u044f\u0437\u0430\u043d\u043d\u044b\u0435 \u0434\u0438\u0430\u0433\u043d\u043e\u0441\u0442\u0438\u0447\u0435\u0441\u043a\u0438\u0435 \u0441\u0438\u0441\u0442\u0435\u043c\u044b.<\/text><\/svg><p class=\"caption\">\u0421\u0438\u043b\u043e\u0432\u0430\u044f \u0438 \u043e\u043f\u0442\u0438\u0447\u0435\u0441\u043a\u0430\u044f \u0447\u0430\u0441\u0442\u0438 \u043f\u0440\u043e\u0445\u043e\u0434\u044f\u0442 \u043e\u0434\u0438\u043d \u0431\u0430\u0440\u0430\u0431\u0430\u043d \u0438 \u043e\u0434\u043d\u0443 \u043c\u0435\u0445\u0430\u043d\u0438\u0447\u0435\u0441\u043a\u0443\u044e \u0442\u0440\u0430\u0435\u043a\u0442\u043e\u0440\u0438\u044e.<\/p><\/div><div class=\"truth\"><strong>Upgrade:<\/strong> \u0441\u0442\u0430\u043d\u0434\u0430\u0440\u0442\u043d\u0430\u044f Arctic-50C \u0432\u0435\u0440\u0441\u0438\u044f \u043f\u0435\u0440\u0435\u0434\u0430\u0435\u0442 \u043c\u043e\u0449\u043d\u043e\u0441\u0442\u044c \u0438 PE; LWL \u0434\u043e\u0431\u0430\u0432\u043b\u044f\u0435\u0442 \u043d\u0435\u0437\u0430\u0432\u0438\u0441\u0438\u043c\u044b\u0439 \u043a\u0430\u043d\u0430\u043b \u0443\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u0438\u044f, \u0442\u0435\u043b\u0435\u043c\u0435\u0442\u0440\u0438\u0438, \u0432\u0438\u0434\u0435\u043e\u043d\u0430\u0431\u043b\u044e\u0434\u0435\u043d\u0438\u044f, interlock \u0438\u043b\u0438 condition monitoring.<\/div>\n<h2>2. \u041a\u043e\u043d\u0441\u0442\u0440\u0443\u043a\u0446\u0438\u044f<\/h2><div class=\"svg-wrap\"><svg viewBox=\"0 0 1200 600\"><rect width=\"1200\" height=\"600\" fill=\"#061018\"\/><rect x=\"30\" y=\"30\" width=\"1140\" height=\"540\" fill=\"#0e1c27\" stroke=\"#315365\"\/><text x=\"55\" y=\"72\" fill=\"#8ee9ff\" font-size=\"22\" font-family=\"Arial\" font-weight=\"900\">LWL Arctic-50C: 3 power cores + 2-part PE + optical element<\/text><g transform=\"translate(330,325)\"><circle r=\"188\" fill=\"#355266\" stroke=\"#c9f5ff\" stroke-width=\"9\"\/><circle r=\"165\" fill=\"none\" stroke=\"#8ee9ff\" stroke-width=\"10\" stroke-dasharray=\"10 8\"\/><circle r=\"145\" fill=\"#152935\" stroke=\"#b69cff\" stroke-width=\"7\"\/><circle r=\"118\" fill=\"#241b14\"\/><g id=\"c\"><circle r=\"52\" fill=\"#111820\" stroke=\"#344758\" stroke-width=\"8\"\/><circle r=\"40\" fill=\"#bd6c2a\" stroke=\"#f49a3d\" stroke-width=\"4\"\/><circle r=\"25\" fill=\"#111820\" stroke=\"#30363a\" stroke-width=\"6\"\/><circle r=\"16\" fill=\"#d9edf7\"\/><\/g><use href=\"#c\" transform=\"translate(0,-85)\"\/><use href=\"#c\" transform=\"translate(75,47)\"\/><use href=\"#c\" transform=\"translate(-75,47)\"\/><circle cx=\"-58\" cy=\"-18\" r=\"16\" fill=\"#6ee58a\"\/><circle cx=\"58\" cy=\"-18\" r=\"16\" fill=\"#6ee58a\"\/><circle cx=\"0\" cy=\"85\" r=\"28\" fill=\"#101927\" stroke=\"#b69cff\" stroke-width=\"5\"\/><circle cx=\"0\" cy=\"85\" r=\"6\" fill=\"#f1c84d\"\/><g fill=\"#8ee9ff\"><circle cx=\"-12\" cy=\"73\" r=\"4\"\/><circle cx=\"12\" cy=\"73\" r=\"4\"\/><circle cx=\"-15\" cy=\"90\" r=\"4\"\/><circle cx=\"15\" cy=\"90\" r=\"4\"\/><circle cx=\"-7\" cy=\"103\" r=\"4\"\/><circle cx=\"7\" cy=\"103\" r=\"4\"\/><\/g><\/g><g transform=\"translate(635,105)\" font-family=\"Arial\"><rect width=\"510\" height=\"430\" fill=\"#07151e\" stroke=\"#315365\"\/><text x=\"20\" y=\"38\" fill=\"#8ee9ff\" font-size=\"18\" font-weight=\"900\">Integrated construction<\/text><text x=\"20\" y=\"78\" fill=\"#d9edf7\">\u2460 very flexible copper, class FS<\/text><text x=\"20\" y=\"116\" fill=\"#d9edf7\">\u2461 EPR semiconductor + EPR &gt;3GI3<\/text><text x=\"20\" y=\"154\" fill=\"#d9edf7\">\u2462 NBR easy-strip<\/text><text x=\"20\" y=\"192\" fill=\"#d9edf7\">\u2463 two split-earth parts<\/text><text x=\"20\" y=\"230\" fill=\"#d9edf7\">\u2464 six optical tubes around central support<\/text><text x=\"20\" y=\"268\" fill=\"#d9edf7\">\u2465 one to four fibers per tube<\/text><text x=\"20\" y=\"306\" fill=\"#d9edf7\">\u2466 sandwich EPR\/CR<\/text><text x=\"20\" y=\"344\" fill=\"#d9edf7\">\u2467 polyester braid + PCP &gt;5GM5<\/text><text x=\"20\" y=\"388\" fill=\"#8ee9ff\" font-weight=\"900\">6 \/ 12 \/ 18 \/ 24 fibers<\/text><\/g><\/svg><p class=\"caption\">LWL replaces the third earth-sector position with a protected optical element.<\/p><\/div><div class=\"spec-grid\"><div class=\"spec\"><span>Conductor<\/span><span>very finely stranded bare copper, class FS<\/span><\/div><div class=\"spec\"><span>PE<\/span><span>\u0434\u0432\u0435 \u0447\u0430\u0441\u0442\u0438 split earth<\/span><\/div><div class=\"spec\"><span>Optical element<\/span><span>six tubes around central support, 1\u20134 fibers per tube<\/span><\/div><div class=\"spec\"><span>Insulation<\/span><span>EPR &gt;3GI3 with semiconductor EPR and NBR easy-strip<\/span><\/div><div class=\"spec\"><span>Inner sheath<\/span><span>special sandwich EPR\/CR<\/span><\/div><div class=\"spec\"><span>Reinforcement<\/span><span>polyester braid<\/span><\/div><div class=\"spec\"><span>Outer sheath<\/span><span>PCP &gt;5GM5<\/span><\/div><\/div>\n<h2>3. \u041e\u043f\u0442\u0438\u0447\u0435\u0441\u043a\u0438\u0435 \u0441\u0432\u043e\u0439\u0441\u0442\u0432\u0430<\/h2><div class=\"table-scroll\"><table><thead><tr><th>\u0422\u0438\u043f<\/th><th>Mode<\/th><th>Cladding<\/th><th>Fiber<\/th><th>Att. 850<\/th><th>Att. 1310<\/th><th>Att. 1550<\/th><th>BW 850<\/th><th>BW 1310<\/th><th>NA<\/th><th>Disp. 1300<\/th><th>Disp. 1550<\/th><\/tr><\/thead><tbody><tr><td>G62,5\/125 \u03bcm<\/td><td>Multi-mode graded index<\/td><td>125 \u03bcm<\/td><td>250 \u03bcm<\/td><td>&lt;3,3 dB\/km<\/td><td>&lt;0,9 dB\/km<\/td><td>\u2014<\/td><td>&gt;400 MHz<\/td><td>&gt;600 MHz<\/td><td>0,275 \u00b1 0,02<\/td><td>\u2014<\/td><td>\u2014<\/td><\/tr><tr><td>G50\/125 \u03bcm<\/td><td>Multi-mode graded index<\/td><td>125 \u03bcm<\/td><td>250 \u03bcm<\/td><td>&lt;2,8 dB\/km<\/td><td>&lt;0,8 dB\/km<\/td><td>\u2014<\/td><td>&gt;400 MHz<\/td><td>&gt;1200 MHz<\/td><td>0,2 \u00b1 0,02<\/td><td>\u2014<\/td><td>\u2014<\/td><\/tr><tr><td>E9\/125 \u03bcm<\/td><td>Single-mode graded index<\/td><td>125 \u03bcm<\/td><td>250 \u03bcm<\/td><td>\u2014<\/td><td>&lt;0,4 dB\/km<\/td><td>&lt;0,3 dB\/km<\/td><td>\u2014<\/td><td>\u2014<\/td><td>0,14 \u00b1 0,02<\/td><td>&lt;3,5 ps\/(nm\u00b7km)<\/td><td>&lt;18 ps\/(nm\u00b7km)<\/td><\/tr><\/tbody><\/table><\/div>\n<div class=\"advice-grid\"><div class=\"advice\"><h4>G62,5\/125<\/h4><p>\u0414\u043b\u044f \u0441\u043e\u0432\u043c\u0435\u0441\u0442\u0438\u043c\u043e\u0441\u0442\u0438 \u0441 \u0441\u0443\u0449\u0435\u0441\u0442\u0432\u0443\u044e\u0449\u0438\u043c multimode \u043e\u0431\u043e\u0440\u0443\u0434\u043e\u0432\u0430\u043d\u0438\u0435\u043c \u0438 \u043a\u043e\u0440\u043e\u0442\u043a\u0438\u0445 \u043f\u0440\u043e\u043c\u044b\u0448\u043b\u0435\u043d\u043d\u044b\u0445 \u043a\u0430\u043d\u0430\u043b\u043e\u0432.<\/p><\/div><div class=\"advice\"><h4>G50\/125<\/h4><p>\u041c\u0435\u043d\u044c\u0448\u0435\u0435 \u0437\u0430\u0442\u0443\u0445\u0430\u043d\u0438\u0435 \u0438 \u0431\u043e\u043b\u0435\u0435 \u0432\u044b\u0441\u043e\u043a\u0430\u044f \u043f\u043e\u043b\u043e\u0441\u0430 \u043d\u0430 1310 nm.<\/p><\/div><div class=\"advice\"><h4>E9\/125<\/h4><p>Single-mode \u0434\u043b\u044f \u0434\u0430\u043b\u044c\u043d\u0438\u0445 \u043b\u0438\u043d\u0438\u0439, \u0432\u044b\u0441\u043e\u043a\u043e\u0439 \u043f\u0440\u043e\u043f\u0443\u0441\u043a\u043d\u043e\u0439 \u0441\u043f\u043e\u0441\u043e\u0431\u043d\u043e\u0441\u0442\u0438 \u0438 \u043c\u0438\u043d\u0438\u043c\u0430\u043b\u044c\u043d\u043e\u0433\u043e attenuation.<\/p><\/div><div class=\"advice\"><h4>Mixed fibers<\/h4><p>\u0418\u0441\u0445\u043e\u0434\u043d\u044b\u0435 \u0434\u0430\u043d\u043d\u044b\u0435 \u0434\u043e\u043f\u0443\u0441\u043a\u0430\u044e\u0442 \u043a\u043e\u043c\u0431\u0438\u043d\u0430\u0446\u0438\u044e \u0440\u0430\u0437\u043d\u044b\u0445 fiber types \u043f\u043e \u0437\u0430\u043f\u0440\u043e\u0441\u0443.<\/p><\/div><\/div>\n<h2>4. \u0427\u0438\u0441\u0442\u043e\u0435 \u0437\u0430\u0442\u0443\u0445\u0430\u043d\u0438\u0435 \u0432\u043e\u043b\u043e\u043a\u043d\u0430<\/h2><div class=\"formula\">A = \u03b1\u00b7L\n\n\u0420\u0430\u0441\u0447\u0435\u0442 \u0443\u0447\u0438\u0442\u044b\u0432\u0430\u0435\u0442 \u0442\u043e\u043b\u044c\u043a\u043e \u0441\u0430\u043c\u043e \u0432\u043e\u043b\u043e\u043a\u043d\u043e.\n\u041d\u0435 \u0432\u043a\u043b\u044e\u0447\u0435\u043d\u044b connectors, splices, rotary joints, macro-bending, temperature margin \u0438 system reserve.<\/div><div class=\"table-scroll\"><table><thead><tr><th>Fiber<\/th><th>Length<\/th><th>850 nm<\/th><th>1310 nm<\/th><th>1550 nm<\/th><th>Boundary<\/th><\/tr><\/thead><tbody><tr><td>G62,5\/125<\/td><td>0,1 \u043a\u043c<\/td><td>0,33 dB<\/td><td>0,09 dB<\/td><td>\u2014<\/td><td>\u0442\u043e\u043b\u044c\u043a\u043e \u0441\u0430\u043c\u043e \u0432\u043e\u043b\u043e\u043a\u043d\u043e<\/td><\/tr><tr><td>G62,5\/125<\/td><td>0,5 \u043a\u043c<\/td><td>1,65 dB<\/td><td>0,45 dB<\/td><td>\u2014<\/td><td>\u0442\u043e\u043b\u044c\u043a\u043e \u0441\u0430\u043c\u043e \u0432\u043e\u043b\u043e\u043a\u043d\u043e<\/td><\/tr><tr><td>G62,5\/125<\/td><td>1 \u043a\u043c<\/td><td>3,30 dB<\/td><td>0,90 dB<\/td><td>\u2014<\/td><td>\u0442\u043e\u043b\u044c\u043a\u043e \u0441\u0430\u043c\u043e \u0432\u043e\u043b\u043e\u043a\u043d\u043e<\/td><\/tr><tr><td>G50\/125<\/td><td>0,1 \u043a\u043c<\/td><td>0,28 dB<\/td><td>0,08 dB<\/td><td>\u2014<\/td><td>\u0442\u043e\u043b\u044c\u043a\u043e \u0441\u0430\u043c\u043e \u0432\u043e\u043b\u043e\u043a\u043d\u043e<\/td><\/tr><tr><td>G50\/125<\/td><td>0,5 \u043a\u043c<\/td><td>1,40 dB<\/td><td>0,40 dB<\/td><td>\u2014<\/td><td>\u0442\u043e\u043b\u044c\u043a\u043e \u0441\u0430\u043c\u043e \u0432\u043e\u043b\u043e\u043a\u043d\u043e<\/td><\/tr><tr><td>G50\/125<\/td><td>1 \u043a\u043c<\/td><td>2,80 dB<\/td><td>0,80 dB<\/td><td>\u2014<\/td><td>\u0442\u043e\u043b\u044c\u043a\u043e \u0441\u0430\u043c\u043e \u0432\u043e\u043b\u043e\u043a\u043d\u043e<\/td><\/tr><tr><td>E9\/125<\/td><td>0,1 \u043a\u043c<\/td><td>\u2014<\/td><td>0,04 dB<\/td><td>0,03 dB<\/td><td>\u0442\u043e\u043b\u044c\u043a\u043e \u0441\u0430\u043c\u043e \u0432\u043e\u043b\u043e\u043a\u043d\u043e<\/td><\/tr><tr><td>E9\/125<\/td><td>0,5 \u043a\u043c<\/td><td>\u2014<\/td><td>0,20 dB<\/td><td>0,15 dB<\/td><td>\u0442\u043e\u043b\u044c\u043a\u043e \u0441\u0430\u043c\u043e \u0432\u043e\u043b\u043e\u043a\u043d\u043e<\/td><\/tr><tr><td>E9\/125<\/td><td>1 \u043a\u043c<\/td><td>\u2014<\/td><td>0,40 dB<\/td><td>0,30 dB<\/td><td>\u0442\u043e\u043b\u044c\u043a\u043e \u0441\u0430\u043c\u043e \u0432\u043e\u043b\u043e\u043a\u043d\u043e<\/td><\/tr><\/tbody><\/table><\/div>\n<h2>5. OTDR cold-soak acceptance<\/h2><div class=\"svg-wrap\"><svg viewBox=\"0 0 1200 590\"><rect width=\"1200\" height=\"590\" fill=\"#061018\"\/><rect x=\"30\" y=\"30\" width=\"1140\" height=\"530\" fill=\"#0e1c27\" stroke=\"#315365\"\/><text x=\"55\" y=\"72\" fill=\"#8ee9ff\" font-size=\"22\" font-family=\"Arial\" font-weight=\"900\">OTDR cold-soak acceptance sequence<\/text><g font-family=\"Arial\"><rect x=\"55\" y=\"120\" width=\"205\" height=\"105\" rx=\"8\" fill=\"#07151e\" stroke=\"#8ee9ff\"\/><text x=\"78\" y=\"155\" fill=\"#8ee9ff\" font-weight=\"900\">1. Factory<\/text><text x=\"78\" y=\"185\" fill=\"#d9edf7\">baseline trace<\/text><rect x=\"285\" y=\"120\" width=\"205\" height=\"105\" rx=\"8\" fill=\"#07151e\" stroke=\"#54b8ff\"\/><text x=\"308\" y=\"155\" fill=\"#54b8ff\" font-weight=\"900\">2. Installation<\/text><text x=\"308\" y=\"185\" fill=\"#d9edf7\">before motion<\/text><rect x=\"515\" y=\"120\" width=\"205\" height=\"105\" rx=\"8\" fill=\"#07151e\" stroke=\"#b69cff\"\/><text x=\"538\" y=\"155\" fill=\"#b69cff\" font-weight=\"900\">3. Cold-soak<\/text><text x=\"538\" y=\"185\" fill=\"#d9edf7\">\u221250 \u00b0C static<\/text><rect x=\"745\" y=\"120\" width=\"205\" height=\"105\" rx=\"8\" fill=\"#07151e\" stroke=\"#f1c84d\"\/><text x=\"768\" y=\"155\" fill=\"#f1c84d\" font-weight=\"900\">4. Slow cycle<\/text><text x=\"768\" y=\"185\" fill=\"#d9edf7\">reeling + OTDR<\/text><rect x=\"975\" y=\"120\" width=\"170\" height=\"105\" rx=\"8\" fill=\"#07151e\" stroke=\"#6ee58a\"\/><text x=\"998\" y=\"155\" fill=\"#6ee58a\" font-weight=\"900\">5. Run-in<\/text><text x=\"998\" y=\"185\" fill=\"#d9edf7\">compare traces<\/text><rect x=\"95\" y=\"320\" width=\"1010\" height=\"145\" rx=\"8\" fill=\"#07151e\" stroke=\"#315365\"\/><text x=\"125\" y=\"358\" fill=\"#8ee9ff\" font-weight=\"900\">A new local loss after cold motion may indicate macro-bending or compression of the optical unit.<\/text><text x=\"125\" y=\"397\" fill=\"#d9edf7\">A simultaneous RPE increase and OTDR event at the same length strongly supports a mechanical root cause.<\/text><text x=\"125\" y=\"436\" fill=\"#d9edf7\">Store traces with temperature, drum layer and paid-out length.<\/text><\/g><\/svg><p class=\"caption\">The optical channel becomes a diagnostic sensor for mechanical health.<\/p><\/div><div class=\"protocol-grid\"><div class=\"protocol\"><h4>Factory<\/h4><p>Baseline \u043a\u0430\u0436\u0434\u043e\u0439 fiber: \u0434\u043b\u0438\u043d\u0430, \u0441\u043e\u0431\u044b\u0442\u0438\u044f, \u0437\u0430\u0442\u0443\u0445\u0430\u043d\u0438\u0435 \u0438 wavelength.<\/p><\/div><div class=\"protocol\"><h4>Installation<\/h4><p>OTDR \u0434\u043e \u043f\u0435\u0440\u0432\u043e\u0433\u043e \u0434\u0432\u0438\u0436\u0435\u043d\u0438\u044f \u043e\u0442\u0434\u0435\u043b\u044f\u0435\u0442 \u043c\u043e\u043d\u0442\u0430\u0436\u043d\u044b\u0439 \u0434\u0435\u0444\u0435\u043a\u0442 \u043e\u0442 reeling fatigue.<\/p><\/div><div class=\"protocol\"><h4>Cold-soak<\/h4><p>\u041f\u043e\u0432\u0442\u043e\u0440\u043d\u0430\u044f \u0442\u0440\u0430\u0441\u0441\u0430 \u043f\u0440\u0438 \u221250 \u00b0C \u0431\u0435\u0437 \u0434\u0432\u0438\u0436\u0435\u043d\u0438\u044f \u0432\u044b\u044f\u0432\u043b\u044f\u0435\u0442 thermal macro-bend.<\/p><\/div><div class=\"protocol\"><h4>Run-in<\/h4><p>\u0421\u0440\u0430\u0432\u043d\u0435\u043d\u0438\u0435 \u043f\u043e\u0441\u043b\u0435 \u043f\u0435\u0440\u0432\u044b\u0445 \u043d\u0438\u0437\u043a\u043e\u0442\u0435\u043c\u043f\u0435\u0440\u0430\u0442\u0443\u0440\u043d\u044b\u0445 \u0446\u0438\u043a\u043b\u043e\u0432.<\/p><\/div><\/div>\n<h2>6. \u041d\u0438\u0437\u043a\u043e\u0442\u0435\u043c\u043f\u0435\u0440\u0430\u0442\u0443\u0440\u043d\u0430\u044f \u043c\u0435\u0445\u0430\u043d\u0438\u043a\u0430<\/h2><div class=\"advice-grid\"><div class=\"advice\"><h4>Slow start<\/h4><p>\u041f\u043e\u0441\u043b\u0435 \u043f\u043e\u043b\u043d\u043e\u0433\u043e cold-soak \u0437\u0430\u043f\u0443\u0441\u043a\u0430\u0442\u044c \u0441 \u043f\u043e\u043d\u0438\u0436\u0435\u043d\u043d\u043e\u0439 \u0441\u043a\u043e\u0440\u043e\u0441\u0442\u044c\u044e \u0438 \u043f\u043b\u0430\u0432\u043d\u044b\u043c acceleration.<\/p><\/div><div class=\"advice\"><h4>Frozen roller<\/h4><p>\u041f\u0440\u0438\u043c\u0435\u0440\u0437\u0448\u0438\u0439 \u0440\u043e\u043b\u0438\u043a \u043c\u043e\u0436\u0435\u0442 \u043e\u0434\u043d\u043e\u0432\u0440\u0435\u043c\u0435\u043d\u043d\u043e \u043f\u043e\u0432\u044b\u0441\u0438\u0442\u044c \u0442\u044f\u0433\u0443 \u0438 \u0441\u043e\u0437\u0434\u0430\u0442\u044c optical macro-bend.<\/p><\/div><div class=\"advice\"><h4>Ice compression<\/h4><p>\u041b\u0435\u0434 \u0443\u0432\u0435\u043b\u0438\u0447\u0438\u0432\u0430\u0435\u0442 effective diameter \u0438 \u0434\u0430\u0432\u043b\u0435\u043d\u0438\u0435 \u043d\u0430 LWL unit.<\/p><\/div><div class=\"advice\"><h4>Thermal cycle<\/h4><p>\u0421\u0440\u0430\u0432\u043d\u0438\u0432\u0430\u0442\u044c RPE \u0438 OTDR \u043f\u043e\u0441\u043b\u0435 \u221250 \u00b0C \u2192 load heating \u2192 cooling.<\/p><\/div><\/div>\n<h2>7. \u0411\u0430\u0440\u0430\u0431\u0430\u043d\u043d\u0430\u044f \u0433\u0435\u043e\u043c\u0435\u0442\u0440\u0438\u044f<\/h2><div class=\"table-scroll\"><table><thead><tr><th>Construction<\/th><th>Dmax<\/th><th>10\u00d7D radius<\/th><th>Min. drum-axis diameter<\/th><th>20\u00d7D S-section<\/th><th>Mass<\/th><\/tr><\/thead><tbody><tr><td>3&#215;25+2&#215;25\/2+LWL<\/td><td>43 \u043c\u043c<\/td><td>430 \u043c\u043c<\/td><td>860 \u043c\u043c<\/td><td>860 \u043c\u043c<\/td><td>2,59 \u043a\u0433\/\u043c<\/td><\/tr><tr><td>3&#215;35+2&#215;25\/2+LWL<\/td><td>44,6 \u043c\u043c<\/td><td>446 \u043c\u043c<\/td><td>892 \u043c\u043c<\/td><td>892 \u043c\u043c<\/td><td>2,96 \u043a\u0433\/\u043c<\/td><\/tr><tr><td>3&#215;50+2&#215;25\/2+LWL<\/td><td>45,8 \u043c\u043c<\/td><td>458 \u043c\u043c<\/td><td>916 \u043c\u043c<\/td><td>916 \u043c\u043c<\/td><td>3,43 \u043a\u0433\/\u043c<\/td><\/tr><tr><td>3&#215;70+2&#215;35\/2+LWL<\/td><td>49,4 \u043c\u043c<\/td><td>494 \u043c\u043c<\/td><td>988 \u043c\u043c<\/td><td>988 \u043c\u043c<\/td><td>4,35 \u043a\u0433\/\u043c<\/td><\/tr><tr><td>3&#215;95+2&#215;50\/2+LWL<\/td><td>55,5 \u043c\u043c<\/td><td>555 \u043c\u043c<\/td><td>1110 \u043c\u043c<\/td><td>1110 \u043c\u043c<\/td><td>5,63 \u043a\u0433\/\u043c<\/td><\/tr><tr><td>3&#215;120+2&#215;70\/2+LWL<\/td><td>59,2 \u043c\u043c<\/td><td>592 \u043c\u043c<\/td><td>1184 \u043c\u043c<\/td><td>1184 \u043c\u043c<\/td><td>6,8 \u043a\u0433\/\u043c<\/td><\/tr><tr><td>3&#215;150+2&#215;70\/2+LWL<\/td><td>63,2 \u043c\u043c<\/td><td>632 \u043c\u043c<\/td><td>1264 \u043c\u043c<\/td><td>1264 \u043c\u043c<\/td><td>7,97 \u043a\u0433\/\u043c<\/td><\/tr><tr><td>3&#215;185+2&#215;95\/2+LWL<\/td><td>68,4 \u043c\u043c<\/td><td>684 \u043c\u043c<\/td><td>1368 \u043c\u043c<\/td><td>1368 \u043c\u043c<\/td><td>9,63 \u043a\u0433\/\u043c<\/td><\/tr><tr><td>3&#215;240+2&#215;120\/2+LWL<\/td><td>74,6 \u043c\u043c<\/td><td>746 \u043c\u043c<\/td><td>1492 \u043c\u043c<\/td><td>1492 \u043c\u043c<\/td><td>12,16 \u043a\u0433\/\u043c<\/td><\/tr><\/tbody><\/table><\/div>\n<h2>8. \u041b\u0435\u0434\u043e\u0432\u0430\u044f \u043d\u0430\u0433\u0440\u0443\u0437\u043a\u0430, \u043f\u0440\u0438\u043c\u0435\u0440 5 \u043c\u043c<\/h2><div class=\"formula\">Assumption only: ice density 900 kg\/m\u00b3, radial ice thickness 5 mm.\nThis is not a product rating; real icing is non-uniform.<\/div><div class=\"table-scroll\"><table><thead><tr><th>Construction<\/th><th>Dmax<\/th><th>Iced diameter<\/th><th>Added ice mass<\/th><th>Mass increase<\/th><th>Added weight \/ 100 m<\/th><\/tr><\/thead><tbody><tr><td>3&#215;25+2&#215;25\/2+LWL<\/td><td>43 \u043c\u043c<\/td><td>53 \u043c\u043c<\/td><td>0,68 \u043a\u0433\/\u043c<\/td><td>26,2%<\/td><td>666 \u041d<\/td><\/tr><tr><td>3&#215;35+2&#215;25\/2+LWL<\/td><td>44,6 \u043c\u043c<\/td><td>54,6 \u043c\u043c<\/td><td>0,7 \u043a\u0433\/\u043c<\/td><td>23,7%<\/td><td>688 \u041d<\/td><\/tr><tr><td>3&#215;50+2&#215;25\/2+LWL<\/td><td>45,8 \u043c\u043c<\/td><td>55,8 \u043c\u043c<\/td><td>0,72 \u043a\u0433\/\u043c<\/td><td>20,9%<\/td><td>705 \u041d<\/td><\/tr><tr><td>3&#215;70+2&#215;35\/2+LWL<\/td><td>49,4 \u043c\u043c<\/td><td>59,4 \u043c\u043c<\/td><td>0,77 \u043a\u0433\/\u043c<\/td><td>17,7%<\/td><td>754 \u041d<\/td><\/tr><tr><td>3&#215;95+2&#215;50\/2+LWL<\/td><td>55,5 \u043c\u043c<\/td><td>65,5 \u043c\u043c<\/td><td>0,86 \u043a\u0433\/\u043c<\/td><td>15,2%<\/td><td>839 \u041d<\/td><\/tr><tr><td>3&#215;120+2&#215;70\/2+LWL<\/td><td>59,2 \u043c\u043c<\/td><td>69,2 \u043c\u043c<\/td><td>0,91 \u043a\u0433\/\u043c<\/td><td>13,3%<\/td><td>89 \u041d<\/td><\/tr><tr><td>3&#215;150+2&#215;70\/2+LWL<\/td><td>63,2 \u043c\u043c<\/td><td>73,2 \u043c\u043c<\/td><td>0,96 \u043a\u0433\/\u043c<\/td><td>12,1%<\/td><td>946 \u041d<\/td><\/tr><tr><td>3&#215;185+2&#215;95\/2+LWL<\/td><td>68,4 \u043c\u043c<\/td><td>78,4 \u043c\u043c<\/td><td>1,04 \u043a\u0433\/\u043c<\/td><td>10,8%<\/td><td>1018 \u041d<\/td><\/tr><tr><td>3&#215;240+2&#215;120\/2+LWL<\/td><td>74,6 \u043c\u043c<\/td><td>84,6 \u043c\u043c<\/td><td>1,13 \u043a\u0433\/\u043c<\/td><td>9,3%<\/td><td>1104 \u041d<\/td><\/tr><\/tbody><\/table><\/div>\n<h2>9. \u0421\u0430\u043c\u043e\u0432\u0435\u0441 \u0438 R\u221250<\/h2><div class=\"formula\">R\u221250 \u2248 R20\u00b7[1 + 0,00393\u00b7(\u221250\u221220)]\nLtheor = Fstatic\/(m\u00b7g)\n\nLtheor includes cable self-weight only.<\/div><div class=\"table-scroll\"><table><thead><tr><th>Construction<\/th><th>R20<\/th><th>R\u221250 estimate<\/th><th>Self-weight 100 m<\/th><th>Margin to Fstatic<\/th><th>Theoretical vertical length<\/th><\/tr><\/thead><tbody><tr><td>3&#215;25+2&#215;25\/2+LWL<\/td><td>0,7839<\/td><td>0,5682<\/td><td>2541 \u041d<\/td><td>-1041 \u041d<\/td><td>59 \u043c<\/td><\/tr><tr><td>3&#215;35+2&#215;25\/2+LWL<\/td><td>0,554<\/td><td>0,4016<\/td><td>2904 \u041d<\/td><td>-804 \u041d<\/td><td>72,3 \u043c<\/td><\/tr><tr><td>3&#215;50+2&#215;25\/2+LWL<\/td><td>0,386<\/td><td>0,2798<\/td><td>3365 \u041d<\/td><td>-365 \u041d<\/td><td>89,2 \u043c<\/td><\/tr><tr><td>3&#215;70+2&#215;35\/2+LWL<\/td><td>0,272<\/td><td>0,1972<\/td><td>4267 \u041d<\/td><td>-67 \u041d<\/td><td>98,4 \u043c<\/td><\/tr><tr><td>3&#215;95+2&#215;50\/2+LWL<\/td><td>0,206<\/td><td>0,1493<\/td><td>5523 \u041d<\/td><td>177 \u041d<\/td><td>103,2 \u043c<\/td><\/tr><tr><td>3&#215;120+2&#215;70\/2+LWL<\/td><td>0,161<\/td><td>0,1167<\/td><td>6671 \u041d<\/td><td>529 \u041d<\/td><td>107,9 \u043c<\/td><\/tr><tr><td>3&#215;150+2&#215;70\/2+LWL<\/td><td>0,129<\/td><td>0,0935<\/td><td>7819 \u041d<\/td><td>1181 \u041d<\/td><td>115,1 \u043c<\/td><\/tr><tr><td>3&#215;185+2&#215;95\/2+LWL<\/td><td>0,106<\/td><td>0,0768<\/td><td>9447 \u041d<\/td><td>1653 \u041d<\/td><td>117,5 \u043c<\/td><\/tr><tr><td>3&#215;240+2&#215;120\/2+LWL<\/td><td>0,0801<\/td><td>0,0581<\/td><td>11929 \u041d<\/td><td>2471 \u041d<\/td><td>120,7 \u043c<\/td><\/tr><\/tbody><\/table><\/div>\n<h2>10. PE + LWL joint diagnostics<\/h2><div class=\"table-scroll\"><table><thead><tr><th>Construction<\/th><th>PE<\/th><th>Total PE<\/th><th>Internal arrangement<\/th><th>Control<\/th><\/tr><\/thead><tbody><tr><td>3&#215;25+2&#215;25\/2+LWL<\/td><td>2&#215;25\/2<\/td><td>25 \u043c\u043c\u00b2 \u0441\u0443\u043c\u043c\u0430\u0440\u043d\u043e<\/td><td>\u0434\u0432\u0435 \u0447\u0430\u0441\u0442\u0438 PE + LWL \u0432 \u043c\u0435\u0436\u0434\u0443\u0436\u0438\u043b\u044c\u044f\u0445<\/td><td>RPE + OTDR \u0434\u043e\/\u043f\u043e\u0441\u043b\u0435 cold-soak<\/td><\/tr><tr><td>3&#215;35+2&#215;25\/2+LWL<\/td><td>2&#215;25\/2<\/td><td>25 \u043c\u043c\u00b2 \u0441\u0443\u043c\u043c\u0430\u0440\u043d\u043e<\/td><td>\u0434\u0432\u0435 \u0447\u0430\u0441\u0442\u0438 PE + LWL \u0432 \u043c\u0435\u0436\u0434\u0443\u0436\u0438\u043b\u044c\u044f\u0445<\/td><td>RPE + OTDR \u0434\u043e\/\u043f\u043e\u0441\u043b\u0435 cold-soak<\/td><\/tr><tr><td>3&#215;50+2&#215;25\/2+LWL<\/td><td>2&#215;25\/2<\/td><td>25 \u043c\u043c\u00b2 \u0441\u0443\u043c\u043c\u0430\u0440\u043d\u043e<\/td><td>\u0434\u0432\u0435 \u0447\u0430\u0441\u0442\u0438 PE + LWL \u0432 \u043c\u0435\u0436\u0434\u0443\u0436\u0438\u043b\u044c\u044f\u0445<\/td><td>RPE + OTDR \u0434\u043e\/\u043f\u043e\u0441\u043b\u0435 cold-soak<\/td><\/tr><tr><td>3&#215;70+2&#215;35\/2+LWL<\/td><td>2&#215;35\/2<\/td><td>35 \u043c\u043c\u00b2 \u0441\u0443\u043c\u043c\u0430\u0440\u043d\u043e<\/td><td>\u0434\u0432\u0435 \u0447\u0430\u0441\u0442\u0438 PE + LWL \u0432 \u043c\u0435\u0436\u0434\u0443\u0436\u0438\u043b\u044c\u044f\u0445<\/td><td>RPE + OTDR \u0434\u043e\/\u043f\u043e\u0441\u043b\u0435 cold-soak<\/td><\/tr><tr><td>3&#215;95+2&#215;50\/2+LWL<\/td><td>2&#215;50\/2<\/td><td>50 \u043c\u043c\u00b2 \u0441\u0443\u043c\u043c\u0430\u0440\u043d\u043e<\/td><td>\u0434\u0432\u0435 \u0447\u0430\u0441\u0442\u0438 PE + LWL \u0432 \u043c\u0435\u0436\u0434\u0443\u0436\u0438\u043b\u044c\u044f\u0445<\/td><td>RPE + OTDR \u0434\u043e\/\u043f\u043e\u0441\u043b\u0435 cold-soak<\/td><\/tr><tr><td>3&#215;120+2&#215;70\/2+LWL<\/td><td>2&#215;70\/2<\/td><td>70 \u043c\u043c\u00b2 \u0441\u0443\u043c\u043c\u0430\u0440\u043d\u043e<\/td><td>\u0434\u0432\u0435 \u0447\u0430\u0441\u0442\u0438 PE + LWL \u0432 \u043c\u0435\u0436\u0434\u0443\u0436\u0438\u043b\u044c\u044f\u0445<\/td><td>RPE + OTDR \u0434\u043e\/\u043f\u043e\u0441\u043b\u0435 cold-soak<\/td><\/tr><tr><td>3&#215;150+2&#215;70\/2+LWL<\/td><td>2&#215;70\/2<\/td><td>70 \u043c\u043c\u00b2 \u0441\u0443\u043c\u043c\u0430\u0440\u043d\u043e<\/td><td>\u0434\u0432\u0435 \u0447\u0430\u0441\u0442\u0438 PE + LWL \u0432 \u043c\u0435\u0436\u0434\u0443\u0436\u0438\u043b\u044c\u044f\u0445<\/td><td>RPE + OTDR \u0434\u043e\/\u043f\u043e\u0441\u043b\u0435 cold-soak<\/td><\/tr><tr><td>3&#215;185+2&#215;95\/2+LWL<\/td><td>2&#215;95\/2<\/td><td>95 \u043c\u043c\u00b2 \u0441\u0443\u043c\u043c\u0430\u0440\u043d\u043e<\/td><td>\u0434\u0432\u0435 \u0447\u0430\u0441\u0442\u0438 PE + LWL \u0432 \u043c\u0435\u0436\u0434\u0443\u0436\u0438\u043b\u044c\u044f\u0445<\/td><td>RPE + OTDR \u0434\u043e\/\u043f\u043e\u0441\u043b\u0435 cold-soak<\/td><\/tr><tr><td>3&#215;240+2&#215;120\/2+LWL<\/td><td>2&#215;120\/2<\/td><td>120 \u043c\u043c\u00b2 \u0441\u0443\u043c\u043c\u0430\u0440\u043d\u043e<\/td><td>\u0434\u0432\u0435 \u0447\u0430\u0441\u0442\u0438 PE + LWL \u0432 \u043c\u0435\u0436\u0434\u0443\u0436\u0438\u043b\u044c\u044f\u0445<\/td><td>RPE + OTDR \u0434\u043e\/\u043f\u043e\u0441\u043b\u0435 cold-soak<\/td><\/tr><\/tbody><\/table><\/div><div class=\"truth\"><strong>Root-cause indicator:<\/strong> simultaneous RPE increase and a new OTDR event at the same paid-out length strongly suggest a local mechanical defect.<\/div>\n<h2>11. Dimensions and radii<\/h2><div class=\"table-scroll\"><table><thead><tr><th>Construction<\/th><th>SAP<\/th><th>External<\/th><th>Conductor<\/th><th>Dmin<\/th><th>Dmax<\/th><th>kg\/km<\/th><th>kg\/m<\/th><th>PE<\/th><th>6\u00d7D<\/th><th>10\u00d7D<\/th><th>20\u00d7D<\/th><\/tr><\/thead><tbody><tr><td>3&#215;25+2&#215;25\/2+LWL<\/td><td>M_R_50C_LWL_6kV_05<\/td><td>5DK3***<\/td><td>7,1<\/td><td>40<\/td><td>43<\/td><td>2 590<\/td><td>2,59<\/td><td>2&#215;25\/2<\/td><td>258<\/td><td>430<\/td><td>860<\/td><\/tr><tr><td>3&#215;35+2&#215;25\/2+LWL<\/td><td>M_R_50C_LWL_6kV_06<\/td><td>5DK3***<\/td><td>8,4<\/td><td>41,6<\/td><td>44,6<\/td><td>2 960<\/td><td>2,96<\/td><td>2&#215;25\/2<\/td><td>267,6<\/td><td>446<\/td><td>892<\/td><\/tr><tr><td>3&#215;50+2&#215;25\/2+LWL<\/td><td>M_R_50C_LWL_6kV_07<\/td><td>5DK3***<\/td><td>10,1<\/td><td>42,8<\/td><td>45,8<\/td><td>3 430<\/td><td>3,43<\/td><td>2&#215;25\/2<\/td><td>274,8<\/td><td>458<\/td><td>916<\/td><\/tr><tr><td>3&#215;70+2&#215;35\/2+LWL<\/td><td>M_R_50C_LWL_6kV_08<\/td><td>5DK3***<\/td><td>11,8<\/td><td>46,4<\/td><td>49,4<\/td><td>4 350<\/td><td>4,35<\/td><td>2&#215;35\/2<\/td><td>296,4<\/td><td>494<\/td><td>988<\/td><\/tr><tr><td>3&#215;95+2&#215;50\/2+LWL<\/td><td>M_R_50C_LWL_6kV_09<\/td><td>5DK3***<\/td><td>13,8<\/td><td>51,5<\/td><td>55,5<\/td><td>5 630<\/td><td>5,63<\/td><td>2&#215;50\/2<\/td><td>333<\/td><td>555<\/td><td>1110<\/td><\/tr><tr><td>3&#215;120+2&#215;70\/2+LWL<\/td><td>M_R_50C_LWL_6kV_01<\/td><td>5DK3***<\/td><td>15,5<\/td><td>55,2<\/td><td>59,2<\/td><td>6 800<\/td><td>6,8<\/td><td>2&#215;70\/2<\/td><td>355,2<\/td><td>592<\/td><td>1184<\/td><\/tr><tr><td>3&#215;150+2&#215;70\/2+LWL<\/td><td>M_R_50C_LWL_6kV_02<\/td><td>5DK3***<\/td><td>17,4<\/td><td>59,2<\/td><td>63,2<\/td><td>7 970<\/td><td>7,97<\/td><td>2&#215;70\/2<\/td><td>379,2<\/td><td>632<\/td><td>1264<\/td><\/tr><tr><td>3&#215;185+2&#215;95\/2+LWL<\/td><td>M_R_50C_LWL_6kV_03<\/td><td>5DK3***<\/td><td>19,2<\/td><td>64,4<\/td><td>68,4<\/td><td>9 630<\/td><td>9,63<\/td><td>2&#215;95\/2<\/td><td>410,4<\/td><td>684<\/td><td>1368<\/td><\/tr><tr><td>3&#215;240+2&#215;120\/2+LWL<\/td><td>M_R_50C_LWL_6kV_04<\/td><td>5DK3***<\/td><td>22,1<\/td><td>70,6<\/td><td>74,6<\/td><td>12 160<\/td><td>12,16<\/td><td>2&#215;120\/2<\/td><td>447,6<\/td><td>746<\/td><td>1492<\/td><\/tr><\/tbody><\/table><\/div>\n<h2>12. Electrical and mechanical calculations<\/h2><div class=\"table-scroll\"><table><thead><tr><th>Construction<\/th><th>Fstatic<\/th><th>Fdynamic<\/th><th>C<\/th><th>L<\/th><th>R20<\/th><th>A<\/th><th>A\/mm\u00b2<\/th><th>MVA<\/th><th>MW<\/th><th>\u0394U\/100 m<\/th><\/tr><\/thead><tbody><tr><td>3&#215;25+2&#215;25\/2+LWL<\/td><td>1 500<\/td><td>1 875<\/td><td>370<\/td><td>0,35<\/td><td>0,7839<\/td><td>131<\/td><td>5,24<\/td><td>1,36<\/td><td>1,23<\/td><td>0,3%<\/td><\/tr><tr><td>3&#215;35+2&#215;25\/2+LWL<\/td><td>2 100<\/td><td>2 625<\/td><td>430<\/td><td>0,32<\/td><td>0,554<\/td><td>162<\/td><td>4,63<\/td><td>1,68<\/td><td>1,52<\/td><td>0,26%<\/td><\/tr><tr><td>3&#215;50+2&#215;25\/2+LWL<\/td><td>3 000<\/td><td>3 750<\/td><td>490<\/td><td>0,28<\/td><td>0,386<\/td><td>202<\/td><td>4,04<\/td><td>2,1<\/td><td>1,89<\/td><td>0,23%<\/td><\/tr><tr><td>3&#215;70+2&#215;35\/2+LWL<\/td><td>4 200<\/td><td>5 250<\/td><td>550<\/td><td>0,27<\/td><td>0,272<\/td><td>250<\/td><td>3,57<\/td><td>2,6<\/td><td>2,34<\/td><td>0,2%<\/td><\/tr><tr><td>3&#215;95+2&#215;50\/2+LWL<\/td><td>5 700<\/td><td>7 125<\/td><td>630<\/td><td>0,26<\/td><td>0,206<\/td><td>301<\/td><td>3,17<\/td><td>3,13<\/td><td>2,82<\/td><td>0,18%<\/td><\/tr><tr><td>3&#215;120+2&#215;70\/2+LWL<\/td><td>7 200<\/td><td>9 000<\/td><td>700<\/td><td>0,25<\/td><td>0,161<\/td><td>352<\/td><td>2,93<\/td><td>3,66<\/td><td>3,29<\/td><td>0,16%<\/td><\/tr><tr><td>3&#215;150+2&#215;70\/2+LWL<\/td><td>9 000<\/td><td>11 250<\/td><td>760<\/td><td>0,25<\/td><td>0,129<\/td><td>404<\/td><td>2,69<\/td><td>4,2<\/td><td>3,78<\/td><td>0,15%<\/td><\/tr><tr><td>3&#215;185+2&#215;95\/2+LWL<\/td><td>11 100<\/td><td>13 875<\/td><td>820<\/td><td>0,24<\/td><td>0,106<\/td><td>461<\/td><td>2,49<\/td><td>4,79<\/td><td>4,31<\/td><td>0,14%<\/td><\/tr><tr><td>3&#215;240+2&#215;120\/2+LWL<\/td><td>14 400<\/td><td>18 000<\/td><td>930<\/td><td>0,24<\/td><td>0,0801<\/td><td>540<\/td><td>2,25<\/td><td>5,61<\/td><td>5,05<\/td><td>0,12%<\/td><\/tr><\/tbody><\/table><\/div>\n<h2>13. Charging current<\/h2><div class=\"formula\">Ic = 2\u03c0fCU0\nQc \u2248 \u221a3\u00b7U\u00b7Ic\nf=50 Hz, U0=3,6 kV, U=6 kV<\/div><div class=\"table-scroll\"><table><thead><tr><th>Construction<\/th><th>C<\/th><th>Ic A\/km<\/th><th>Qc kvar\/km<\/th><\/tr><\/thead><tbody><tr><td>3&#215;25+2&#215;25\/2+LWL<\/td><td>370<\/td><td>0,418<\/td><td>4,3<\/td><\/tr><tr><td>3&#215;35+2&#215;25\/2+LWL<\/td><td>430<\/td><td>0,486<\/td><td>5,1<\/td><\/tr><tr><td>3&#215;50+2&#215;25\/2+LWL<\/td><td>490<\/td><td>0,554<\/td><td>5,8<\/td><\/tr><tr><td>3&#215;70+2&#215;35\/2+LWL<\/td><td>550<\/td><td>0,622<\/td><td>6,5<\/td><\/tr><tr><td>3&#215;95+2&#215;50\/2+LWL<\/td><td>630<\/td><td>0,713<\/td><td>7,4<\/td><\/tr><tr><td>3&#215;120+2&#215;70\/2+LWL<\/td><td>700<\/td><td>0,792<\/td><td>8,2<\/td><\/tr><tr><td>3&#215;150+2&#215;70\/2+LWL<\/td><td>760<\/td><td>0,86<\/td><td>8,9<\/td><\/tr><tr><td>3&#215;185+2&#215;95\/2+LWL<\/td><td>820<\/td><td>0,927<\/td><td>9,6<\/td><\/tr><tr><td>3&#215;240+2&#215;120\/2+LWL<\/td><td>930<\/td><td>1,052<\/td><td>10,9<\/td><\/tr><\/tbody><\/table><\/div>\n<h2>14. Tensile verification<\/h2><div class=\"formula\">Fstatic=20 N\/mm\u00b2\u00b73\u00b7S\nFdynamic=25 N\/mm\u00b2\u00b73\u00b7S\n6\u00d7D fixed \u00b7 10\u00d7D flexible \u00b7 20\u00d7D S-section \u00b7 test voltage 11 kV<\/div><div class=\"table-scroll\"><table><thead><tr><th>Construction<\/th><th>Section<\/th><th>Calculated Fstatic<\/th><th>Table Fstatic<\/th><th>Fdynamic<\/th><th>Status<\/th><\/tr><\/thead><tbody><tr><td>3&#215;25+2&#215;25\/2+LWL<\/td><td>25 \u043c\u043c\u00b2<\/td><td>1 500 \u041d<\/td><td>1 500 \u041d<\/td><td>1 875 \u041d<\/td><td>\u0441\u043e\u043e\u0442\u0432\u0435\u0442\u0441\u0442\u0432\u0443\u0435\u0442<\/td><\/tr><tr><td>3&#215;35+2&#215;25\/2+LWL<\/td><td>35 \u043c\u043c\u00b2<\/td><td>2 100 \u041d<\/td><td>2 100 \u041d<\/td><td>2 625 \u041d<\/td><td>\u0441\u043e\u043e\u0442\u0432\u0435\u0442\u0441\u0442\u0432\u0443\u0435\u0442<\/td><\/tr><tr><td>3&#215;50+2&#215;25\/2+LWL<\/td><td>50 \u043c\u043c\u00b2<\/td><td>3 000 \u041d<\/td><td>3 000 \u041d<\/td><td>3 750 \u041d<\/td><td>\u0441\u043e\u043e\u0442\u0432\u0435\u0442\u0441\u0442\u0432\u0443\u0435\u0442<\/td><\/tr><tr><td>3&#215;70+2&#215;35\/2+LWL<\/td><td>70 \u043c\u043c\u00b2<\/td><td>4 200 \u041d<\/td><td>4 200 \u041d<\/td><td>5 250 \u041d<\/td><td>\u0441\u043e\u043e\u0442\u0432\u0435\u0442\u0441\u0442\u0432\u0443\u0435\u0442<\/td><\/tr><tr><td>3&#215;95+2&#215;50\/2+LWL<\/td><td>95 \u043c\u043c\u00b2<\/td><td>5 700 \u041d<\/td><td>5 700 \u041d<\/td><td>7 125 \u041d<\/td><td>\u0441\u043e\u043e\u0442\u0432\u0435\u0442\u0441\u0442\u0432\u0443\u0435\u0442<\/td><\/tr><tr><td>3&#215;120+2&#215;70\/2+LWL<\/td><td>120 \u043c\u043c\u00b2<\/td><td>7 200 \u041d<\/td><td>7 200 \u041d<\/td><td>9 000 \u041d<\/td><td>\u0441\u043e\u043e\u0442\u0432\u0435\u0442\u0441\u0442\u0432\u0443\u0435\u0442<\/td><\/tr><tr><td>3&#215;150+2&#215;70\/2+LWL<\/td><td>150 \u043c\u043c\u00b2<\/td><td>9 000 \u041d<\/td><td>9 000 \u041d<\/td><td>11 250 \u041d<\/td><td>\u0441\u043e\u043e\u0442\u0432\u0435\u0442\u0441\u0442\u0432\u0443\u0435\u0442<\/td><\/tr><tr><td>3&#215;185+2&#215;95\/2+LWL<\/td><td>185 \u043c\u043c\u00b2<\/td><td>11 100 \u041d<\/td><td>11 100 \u041d<\/td><td>13 875 \u041d<\/td><td>\u0441\u043e\u043e\u0442\u0432\u0435\u0442\u0441\u0442\u0432\u0443\u0435\u0442<\/td><\/tr><tr><td>3&#215;240+2&#215;120\/2+LWL<\/td><td>240 \u043c\u043c\u00b2<\/td><td>14 400 \u041d<\/td><td>14 400 \u041d<\/td><td>18 000 \u041d<\/td><td>\u0441\u043e\u043e\u0442\u0432\u0435\u0442\u0441\u0442\u0432\u0443\u0435\u0442<\/td><\/tr><\/tbody><\/table><\/div>\n<h2>15. Selection overview<\/h2><div class=\"table-scroll\"><table><thead><tr><th>Construction<\/th><th>Current<\/th><th>\u2248 MW<\/th><th>Dmax<\/th><th>Mass<\/th><th>Application<\/th><\/tr><\/thead><tbody><tr><td>3&#215;25+2&#215;25\/2+LWL<\/td><td>131 \u0410<\/td><td>1,23 \u041c\u0412\u0442<\/td><td>43 \u043c\u043c<\/td><td>2 590 \u043a\u0433\/\u043a\u043c<\/td><td>\u043a\u043e\u043c\u043f\u0430\u043a\u0442\u043d\u0430\u044f \u043c\u0430\u0448\u0438\u043d\u0430 \u0441 \u0438\u043d\u0442\u0435\u0433\u0440\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u043e\u0439 \u043e\u043f\u0442\u0438\u0447\u0435\u0441\u043a\u043e\u0439 \u0441\u0432\u044f\u0437\u044c\u044e<\/td><\/tr><tr><td>3&#215;35+2&#215;25\/2+LWL<\/td><td>162 \u0410<\/td><td>1,52 \u041c\u0412\u0442<\/td><td>44,6 \u043c\u043c<\/td><td>2 960 \u043a\u0433\/\u043a\u043c<\/td><td>\u043a\u043e\u043c\u043f\u0430\u043a\u0442\u043d\u0430\u044f \u043c\u0430\u0448\u0438\u043d\u0430 \u0441 \u0438\u043d\u0442\u0435\u0433\u0440\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u043e\u0439 \u043e\u043f\u0442\u0438\u0447\u0435\u0441\u043a\u043e\u0439 \u0441\u0432\u044f\u0437\u044c\u044e<\/td><\/tr><tr><td>3&#215;50+2&#215;25\/2+LWL<\/td><td>202 \u0410<\/td><td>1,89 \u041c\u0412\u0442<\/td><td>45,8 \u043c\u043c<\/td><td>3 430 \u043a\u0433\/\u043a\u043c<\/td><td>\u0434\u0440\u043e\u0431\u0438\u043b\u043a\u0430, \u043f\u0435\u0440\u0435\u0433\u0440\u0443\u0436\u0430\u0442\u0435\u043b\u044c \u0438\u043b\u0438 \u0441\u0440\u0435\u0434\u043d\u0438\u0439 \u043f\u0440\u0438\u0432\u043e\u0434 \u0441 FO<\/td><\/tr><tr><td>3&#215;70+2&#215;35\/2+LWL<\/td><td>250 \u0410<\/td><td>2,34 \u041c\u0412\u0442<\/td><td>49,4 \u043c\u043c<\/td><td>4 350 \u043a\u0433\/\u043a\u043c<\/td><td>\u0434\u0440\u043e\u0431\u0438\u043b\u043a\u0430, \u043f\u0435\u0440\u0435\u0433\u0440\u0443\u0436\u0430\u0442\u0435\u043b\u044c \u0438\u043b\u0438 \u0441\u0440\u0435\u0434\u043d\u0438\u0439 \u043f\u0440\u0438\u0432\u043e\u0434 \u0441 FO<\/td><\/tr><tr><td>3&#215;95+2&#215;50\/2+LWL<\/td><td>301 \u0410<\/td><td>2,82 \u041c\u0412\u0442<\/td><td>55,5 \u043c\u043c<\/td><td>5 630 \u043a\u0433\/\u043a\u043c<\/td><td>\u043a\u0440\u0443\u043f\u043d\u044b\u0439 \u043f\u0440\u0438\u0432\u043e\u0434 \u0441 \u0442\u0435\u043b\u0435\u043c\u0435\u0442\u0440\u0438\u0435\u0439 \u0438 condition monitoring<\/td><\/tr><tr><td>3&#215;120+2&#215;70\/2+LWL<\/td><td>352 \u0410<\/td><td>3,29 \u041c\u0412\u0442<\/td><td>59,2 \u043c\u043c<\/td><td>6 800 \u043a\u0433\/\u043a\u043c<\/td><td>\u043a\u0440\u0443\u043f\u043d\u044b\u0439 \u043f\u0440\u0438\u0432\u043e\u0434 \u0441 \u0442\u0435\u043b\u0435\u043c\u0435\u0442\u0440\u0438\u0435\u0439 \u0438 condition monitoring<\/td><\/tr><tr><td>3&#215;150+2&#215;70\/2+LWL<\/td><td>404 \u0410<\/td><td>3,78 \u041c\u0412\u0442<\/td><td>63,2 \u043c\u043c<\/td><td>7 970 \u043a\u0433\/\u043a\u043c<\/td><td>\u043a\u0440\u0443\u043f\u043d\u044b\u0439 \u043f\u0440\u0438\u0432\u043e\u0434 \u0441 \u0442\u0435\u043b\u0435\u043c\u0435\u0442\u0440\u0438\u0435\u0439 \u0438 condition monitoring<\/td><\/tr><tr><td>3&#215;185+2&#215;95\/2+LWL<\/td><td>461 \u0410<\/td><td>4,31 \u041c\u0412\u0442<\/td><td>68,4 \u043c\u043c<\/td><td>9 630 \u043a\u0433\/\u043a\u043c<\/td><td>\u0432\u044b\u0441\u043e\u043a\u043e\u043c\u043e\u0449\u043d\u0430\u044f \u043c\u0430\u0448\u0438\u043d\u0430; \u043f\u043e\u043b\u043d\u0430\u044f Arctic\/OTDR \u043f\u0440\u043e\u0432\u0435\u0440\u043a\u0430<\/td><\/tr><tr><td>3&#215;240+2&#215;120\/2+LWL<\/td><td>540 \u0410<\/td><td>5,05 \u041c\u0412\u0442<\/td><td>74,6 \u043c\u043c<\/td><td>12 160 \u043a\u0433\/\u043a\u043c<\/td><td>\u0432\u044b\u0441\u043e\u043a\u043e\u043c\u043e\u0449\u043d\u0430\u044f \u043c\u0430\u0448\u0438\u043d\u0430; \u043f\u043e\u043b\u043d\u0430\u044f Arctic\/OTDR \u043f\u0440\u043e\u0432\u0435\u0440\u043a\u0430<\/td><\/tr><\/tbody><\/table><\/div>\n<h2>16. Electro-optical FMEA<\/h2><div class=\"fmea-grid\"><div class=\"fmea\"><h4>Cold macro-bend<\/h4><p>Frozen roller or ice creates local optical loss.<\/p><\/div><div class=\"fmea\"><h4>LWL displacement<\/h4><p>Shock tension or crossed winding destabilizes the optical unit.<\/p><\/div><div class=\"fmea\"><h4>Fiber breakout cycle<\/h4><p>\u221250 \u00b0C to warm enclosure causes condensation or splice loss.<\/p><\/div><div class=\"fmea\"><h4>Combined failure<\/h4><p>RPE increase plus OTDR event points to interstice damage.<\/p><\/div><\/div>\n<h2>17. Acceptance checklist<\/h2><ul class=\"checklist\"><li>Verify LWL Arctic-50C marking, SAP, length, fiber count and fiber type.<\/li><li>Verify fully flexible operation to \u221250 \u00b0C and 11 kV test documentation.<\/li><li>Save factory OTDR baseline for every fiber and wavelength.<\/li><li>Repeat OTDR after installation, cold-soak and first operating cycles.<\/li><li>Measure R20, RPE and insulation before and after cold commissioning.<\/li><li>Check drum, rollers, 10\u00d7D radius, 20\u00d7D S-section and acceleration.<\/li><li>Check power termination, fiber breakout, service loop and sealing.<\/li><\/ul>\n<h2>18. Engineering limitations<\/h2><div class=\"warn\">Fiber-loss calculations include fiber attenuation only and exclude connectors, splices, rotary joints, macro-bending, temperature, aging and system margin. R\u221250 and 5 mm ice calculations are illustrative assumptions. Final design requires approved drawings, OTDR baseline, thermal model, short-circuit calculation and protection coordination.<\/div><\/div>\n<footer><div class=\"container\"><h4>Feichun Cable \u2014 Arctic-50C electro-optical reeling cables<\/h4><div class=\"contact\"><div><strong>\u0422\u0435\u043b\u0435\u0444\u043e\u043d:<\/strong><br><a href=\"tel:+8613855123218\">+86 13855123218<\/a><\/div><div><strong>\u0422\u0435\u0445\u043d\u0438\u0447\u0435\u0441\u043a\u0430\u044f \u043f\u043e\u0447\u0442\u0430:<\/strong><br><a href=\"mailto:Tech@feichuncables.com\">Tech@feichuncables.com<\/a><\/div><\/div><p class=\"small\">Feichun Cable \u043d\u0435 \u0430\u0444\u0444\u0438\u043b\u0438\u0440\u043e\u0432\u0430\u043d \u0441 \u0432\u043b\u0430\u0434\u0435\u043b\u044c\u0446\u0430\u043c\u0438 \u043e\u0431\u043e\u0437\u043d\u0430\u0447\u0435\u043d\u0438\u0439 PROTOLON \u0438\u043b\u0438 PROTOFIRM. \u041d\u0430\u0437\u0432\u0430\u043d\u0438\u044f \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u044e\u0442\u0441\u044f \u043a\u0430\u043a \u0442\u0435\u0445\u043d\u0438\u0447\u0435\u0441\u043a\u0438\u0435 \u043f\u0435\u0440\u0435\u043a\u0440\u0435\u0441\u0442\u043d\u044b\u0435 \u043e\u0431\u043e\u0437\u043d\u0430\u0447\u0435\u043d\u0438\u044f \u0438\u0437 \u043f\u0440\u0435\u0434\u043e\u0441\u0442\u0430\u0432\u043b\u0435\u043d\u043d\u043e\u0439 \u0441\u043f\u0435\u0446\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u0438. \u041f\u043e\u0441\u0442\u0430\u0432\u043a\u0430 \u043f\u043e\u0434\u0442\u0432\u0435\u0440\u0436\u0434\u0430\u0435\u0442\u0441\u044f \u0434\u043e\u043a\u0443\u043c\u0435\u043d\u0442\u0430\u043c\u0438 \u043f\u0430\u0440\u0442\u0438\u0438.<\/p><div>FEICHUN-M-R-LWL-ARCTIC-50C-6KV-RU \u00b7 24\/07\/2026<\/div><\/div><\/footer><\/body><\/html>\n","protected":false},"excerpt":{"rendered":"\u0421\u0438\u043b\u043e\u0432\u0430\u044f \u043f\u0435\u0440\u0435\u0434\u0430\u0447\u0430, split earth \u0438 \u043e\u043f\u0442\u0438\u0447\u0435\u0441\u043a\u0430\u044f \u0441\u0432\u044f\u0437\u044c \u0432 \u043e\u0434\u043d\u043e\u043c \u0433\u0438\u0431\u043a\u043e\u043c \u0431\u0430\u0440\u0430\u0431\u0430\u043d\u043d\u043e\u043c \u043a\u0430\u0431\u0435\u043b\u0435.\n\u041a\u0430\u0431\u0435\u043b\u044c \u043e\u0431\u044a\u0435\u0434\u0438\u043d\u044f\u0435\u0442 \u0442\u0440\u0438 \u0441\u0438\u043b\u043e\u0432\u044b\u0435 \u0436\u0438\u043b\u044b, \u0434\u0432\u0435 \u0447\u0430\u0441\u0442\u0438 \u0437\u0430\u0449\u0438\u0442\u043d\u043e\u0433\u043e \u043f\u0440\u043e\u0432\u043e\u0434\u043d\u0438\u043a\u0430 \u0438 LWL-\u044d\u043b\u0435\u043c\u0435\u043d\u0442 \u0438\u0437 \u0448\u0435\u0441\u0442\u0438 \u0442\u0440\u0443\u0431\u043e\u043a \u0432\u043e\u043a\u0440\u0443\u0433 \u0446\u0435\u043d\u0442\u0440\u0430\u043b\u044c\u043d\u043e\u0439 \u043e\u043f\u043e\u0440\u044b. \u0412 \u043a\u0430\u0436\u0434\u043e\u0439 \u0442\u0440\u0443\u0431\u043a\u0435 \u0440\u0430\u0437\u043c\u0435\u0449\u0430\u0435\u0442\u0441\u044f \u043e\u0442 \u043e\u0434\u043d\u043e\u0433\u043e \u0434\u043e \u0447\u0435\u0442\u044b\u0440\u0435\u0445 \u0432\u043e\u043b\u043e\u043a\u043e\u043d, \u043f\u043e\u044d\u0442\u043e\u043c\u0443 \u0434\u043e\u0441\u0442\u0443\u043f\u043d\u044b 6, 12, 18 \u0438\u043b\u0438 24 fibers.\nFully flexible operation \u0434\u043e \u221250 \u00b0C \u0442\u0440\u0435\u0431\u0443\u0435\u0442 \u0434\u0432\u043e\u0439\u043d\u043e\u0439 \u043f\u0440\u0438\u0435\u043c\u043a\u0438: \u044d\u043b\u0435\u043a\u0442\u0440\u0438\u0447\u0435\u0441\u043a\u043e\u0439 \u0438 \u043e\u043f\u0442\u0438\u0447\u0435\u0441\u043a\u043e\u0439. \u041a\u0430\u0431\u0435\u043b\u044c \u0434\u043e\u043b\u0436\u0435\u043d \u0432\u044b\u0434\u0435\u0440\u0436\u0438\u0432\u0430\u0442\u044c \u0445\u043e\u043b\u043e\u0434\u043d\u044b\u0439 \u0438\u0437\u0433\u0438\u0431, \u0430 \u043e\u043f\u0442\u0438\u0447\u0435\u0441\u043a\u0430\u044f \u0442\u0440\u0430\u0441\u0441\u0430 \u2014 \u0441\u043e\u0445\u0440\u0430\u043d\u044f\u0442\u044c \u0441\u0442\u0430\u0431\u0438\u043b\u044c\u043d\u043e\u0441\u0442\u044c \u043f\u043e\u0441\u043b\u0435 cold-soak, \u043d\u0430\u043c\u043e\u0442\u043a\u0438 \u0438 \u0442\u0435\u0440\u043c\u043e\u0446\u0438\u043a\u043b\u043e\u0432.","protected":false},"author":1,"featured_media":24302,"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":[66,56],"tags":[16,17],"class_list":["post-24301","post","type-post","status-publish","format-standard","has-post-thumbnail","category-common-problems-encountered-in-cable-applications","category-reeling-cable","tag-din-vde-0250","tag-reeling-cable","cs-entry"],"_links":{"self":[{"href":"https:\/\/feichuncables.com\/blog\/wp-json\/wp\/v2\/posts\/24301","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=24301"}],"version-history":[{"count":2,"href":"https:\/\/feichuncables.com\/blog\/wp-json\/wp\/v2\/posts\/24301\/revisions"}],"predecessor-version":[{"id":24304,"href":"https:\/\/feichuncables.com\/blog\/wp-json\/wp\/v2\/posts\/24301\/revisions\/24304"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/feichuncables.com\/blog\/wp-json\/wp\/v2\/media\/24302"}],"wp:attachment":[{"href":"https:\/\/feichuncables.com\/blog\/wp-json\/wp\/v2\/media?parent=24301"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/feichuncables.com\/blog\/wp-json\/wp\/v2\/categories?post=24301"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/feichuncables.com\/blog\/wp-json\/wp\/v2\/tags?post=24301"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}