\u0627\u062e\u062a\u064a\u0627\u0631 \u0645\u0642\u0627\u0633 \u0627\u0644\u0645\u0648\u0635\u0644 \u0644\u0645\u0639\u062f\u0627\u062a \u0627\u0644\u0623\u0646\u0641\u0627\u0642 | \u96a7\u9053\u8a2d\u5099\u5c0e\u9ad4\u9078\u64c7 | Conductor Sizing for Tunnelling – Anhui Feichun<\/title>\n \n \n <link rel=\"preconnect\" href=\"https:\/\/fonts.googleapis.com\">\n <link rel=\"preconnect\" href=\"https:\/\/fonts.gstatic.com\" crossorigin>\n <link href=\"https:\/\/fonts.googleapis.com\/css2?family=Noto+Sans+Arabic:wght@400;600;700&family=Noto+Sans+TC:wght@400;500;700&family=IBM+Plex+Sans:wght@400;500;600;700&display=swap\" rel=\"stylesheet\">\n \n <style>\n \/* ========================================\n CSS Variables for consistent theming\n Minimizes repaints and layout shifts\n ======================================== *\/\n :root {\n --bg-primary: #0a0e14;\n --bg-secondary: #121820;\n --bg-tertiary: #1a222d;\n --bg-card: #151c26;\n --accent-copper: #c87533;\n --accent-copper-light: #e09050;\n --accent-gold: #d4a84b;\n --accent-blue: #2d5a7b;\n --accent-blue-light: #4a8ab5;\n --text-primary: #e8e8e8;\n --text-secondary: #a8b2c1;\n --text-muted: #6b7a8f;\n --border-color: #2a3644;\n --success: #2d8a5e;\n --warning: #c4762d;\n --font-arabic: 'Noto Sans Arabic', 'Segoe UI', Tahoma, sans-serif;\n --font-chinese: 'Noto Sans TC', 'Microsoft JhengHei', sans-serif;\n --font-english: 'IBM Plex Sans', -apple-system, sans-serif;\n --max-width: 1400px;\n --content-padding: clamp(1rem, 4vw, 3rem);\n }\n\n \/* ========================================\n Reset and Base Styles\n ======================================== *\/\n *, *::before, *::after {\n box-sizing: border-box;\n margin: 0;\n padding: 0;\n }\n\n html {\n scroll-behavior: smooth;\n font-size: 16px;\n }\n\n body {\n background-color: var(--bg-primary);\n color: var(--text-primary);\n font-family: var(--font-arabic);\n line-height: 1.8;\n min-height: 100vh;\n \/* Prevent layout shift from scrollbar *\/\n overflow-y: scroll;\n }\n\n \/* ========================================\n Typography - Language-specific styling\n ======================================== *\/\n .lang-ar {\n font-family: var(--font-arabic);\n direction: rtl;\n text-align: right;\n }\n\n .lang-zh {\n font-family: var(--font-chinese);\n direction: ltr;\n text-align: left;\n }\n\n .lang-en {\n font-family: var(--font-english);\n direction: ltr;\n text-align: left;\n }\n\n \/* Explanation text styling *\/\n .explain-zh, .explain-en {\n font-size: 0.9em;\n padding: 0.8rem 1rem;\n margin-top: 0.5rem;\n border-radius: 6px;\n background: var(--bg-tertiary);\n border-right: 3px solid var(--accent-copper);\n }\n\n .explain-zh {\n font-family: var(--font-chinese);\n direction: ltr;\n text-align: left;\n border-right: none;\n border-left: 3px solid var(--accent-gold);\n }\n\n .explain-en {\n font-family: var(--font-english);\n direction: ltr;\n text-align: left;\n border-right: none;\n border-left: 3px solid var(--accent-blue-light);\n }\n\n .lang-label {\n font-size: 0.75rem;\n font-weight: 600;\n text-transform: uppercase;\n letter-spacing: 0.05em;\n margin-bottom: 0.3rem;\n display: block;\n }\n\n .lang-label.zh { color: var(--accent-gold); }\n .lang-label.en { color: var(--accent-blue-light); }\n\n \/* ========================================\n Header\n ======================================== *\/\n header {\n background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-tertiary) 100%);\n border-bottom: 2px solid var(--accent-copper);\n padding: 1.5rem var(--content-padding);\n position: sticky;\n top: 0;\n z-index: 100;\n \/* Prevent CLS *\/\n min-height: 80px;\n }\n\n .header-content {\n max-width: var(--max-width);\n margin: 0 auto;\n display: flex;\n justify-content: space-between;\n align-items: center;\n flex-wrap: wrap;\n gap: 1rem;\n }\n\n .company-name {\n display: flex;\n flex-direction: column;\n gap: 0.2rem;\n }\n\n .company-name .ar {\n font-size: 1.1rem;\n font-weight: 700;\n color: var(--accent-copper-light);\n }\n\n .company-name .zh {\n font-family: var(--font-chinese);\n font-size: 0.95rem;\n color: var(--text-secondary);\n direction: ltr;\n }\n\n .company-name .en {\n font-family: var(--font-english);\n font-size: 0.85rem;\n color: var(--text-muted);\n direction: ltr;\n }\n\n \/* ========================================\n Contact Bar\n ======================================== *\/\n .contact-bar {\n display: flex;\n gap: 1rem;\n flex-wrap: wrap;\n align-items: center;\n }\n\n .contact-item {\n display: flex;\n align-items: center;\n gap: 0.5rem;\n padding: 0.5rem 1rem;\n background: var(--bg-primary);\n border-radius: 6px;\n font-size: 0.85rem;\n color: var(--text-secondary);\n text-decoration: none;\n transition: background 0.2s ease;\n }\n\n .contact-item:hover {\n background: var(--bg-tertiary);\n color: var(--accent-copper-light);\n }\n\n .contact-item svg {\n width: 18px;\n height: 18px;\n fill: currentColor;\n flex-shrink: 0;\n }\n\n \/* ========================================\n Main Content - Full Width\n ======================================== *\/\n main {\n max-width: var(--max-width);\n margin: 0 auto;\n padding: 2rem var(--content-padding);\n width: 100%;\n }\n\n \/* ========================================\n Hero Section\n ======================================== *\/\n .hero {\n background: linear-gradient(145deg, var(--bg-card) 0%, var(--bg-secondary) 100%);\n border: 1px solid var(--border-color);\n border-radius: 12px;\n padding: 2.5rem;\n margin-bottom: 2.5rem;\n position: relative;\n overflow: hidden;\n }\n\n .hero::before {\n content: '';\n position: absolute;\n top: 0;\n right: 0;\n width: 300px;\n height: 300px;\n background: radial-gradient(circle, var(--accent-copper) 0%, transparent 70%);\n opacity: 0.08;\n pointer-events: none;\n }\n\n .hero h1 {\n font-size: clamp(1.5rem, 4vw, 2.2rem);\n font-weight: 700;\n color: var(--text-primary);\n margin-bottom: 1rem;\n line-height: 1.4;\n }\n\n .hero-subtitle {\n font-size: 1rem;\n color: var(--text-secondary);\n margin-bottom: 1.5rem;\n }\n\n \/* ========================================\n Content Sections\n ======================================== *\/\n .section {\n background: var(--bg-card);\n border: 1px solid var(--border-color);\n border-radius: 12px;\n padding: 2rem;\n margin-bottom: 2rem;\n }\n\n .section-header {\n display: flex;\n align-items: center;\n gap: 1rem;\n margin-bottom: 1.5rem;\n padding-bottom: 1rem;\n border-bottom: 1px solid var(--border-color);\n }\n\n .section-icon {\n width: 48px;\n height: 48px;\n background: linear-gradient(135deg, var(--accent-copper) 0%, var(--accent-copper-light) 100%);\n border-radius: 10px;\n display: flex;\n align-items: center;\n justify-content: center;\n flex-shrink: 0;\n }\n\n .section-icon svg {\n width: 24px;\n height: 24px;\n fill: white;\n }\n\n .section h2 {\n font-size: 1.4rem;\n font-weight: 700;\n color: var(--text-primary);\n }\n\n .section h3 {\n font-size: 1.15rem;\n font-weight: 600;\n color: var(--accent-copper-light);\n margin: 1.5rem 0 1rem;\n }\n\n .section p {\n color: var(--text-secondary);\n margin-bottom: 1rem;\n line-height: 1.9;\n }\n\n \/* ========================================\n Data Tables - Professional Styling\n ======================================== *\/\n .table-container {\n width: 100%;\n overflow-x: auto;\n margin: 1.5rem 0;\n border-radius: 8px;\n border: 1px solid var(--border-color);\n }\n\n table {\n width: 100%;\n border-collapse: collapse;\n font-size: 0.9rem;\n \/* Prevent layout shift *\/\n table-layout: fixed;\n }\n\n thead {\n background: linear-gradient(180deg, var(--bg-tertiary) 0%, var(--bg-secondary) 100%);\n }\n\n th {\n padding: 1rem 0.8rem;\n text-align: center;\n font-weight: 600;\n color: var(--accent-copper-light);\n border-bottom: 2px solid var(--accent-copper);\n white-space: nowrap;\n }\n\n td {\n padding: 0.85rem 0.8rem;\n text-align: center;\n border-bottom: 1px solid var(--border-color);\n color: var(--text-secondary);\n }\n\n tbody tr:hover {\n background: var(--bg-tertiary);\n }\n\n .table-note {\n font-size: 0.8rem;\n color: var(--text-muted);\n margin-top: 0.8rem;\n padding: 0.8rem;\n background: var(--bg-tertiary);\n border-radius: 6px;\n }\n\n \/* ========================================\n Parameter Cards Grid\n ======================================== *\/\n .param-grid {\n display: grid;\n grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));\n gap: 1.5rem;\n margin: 1.5rem 0;\n }\n\n .param-card {\n background: var(--bg-tertiary);\n border: 1px solid var(--border-color);\n border-radius: 10px;\n padding: 1.5rem;\n transition: border-color 0.2s ease;\n }\n\n .param-card:hover {\n border-color: var(--accent-copper);\n }\n\n .param-label {\n font-size: 0.85rem;\n color: var(--text-muted);\n margin-bottom: 0.5rem;\n }\n\n .param-value {\n font-size: 1.6rem;\n font-weight: 700;\n color: var(--accent-copper-light);\n margin-bottom: 0.3rem;\n }\n\n .param-unit {\n font-size: 0.9rem;\n color: var(--text-secondary);\n }\n\n \/* ========================================\n Formula Box\n ======================================== *\/\n .formula-box {\n background: var(--bg-secondary);\n border: 1px solid var(--accent-copper);\n border-radius: 10px;\n padding: 1.5rem;\n margin: 1.5rem 0;\n text-align: center;\n }\n\n .formula {\n font-family: 'Courier New', monospace;\n font-size: 1.2rem;\n color: var(--accent-gold);\n letter-spacing: 0.05em;\n direction: ltr;\n }\n\n .formula-desc {\n font-size: 0.85rem;\n color: var(--text-muted);\n margin-top: 0.8rem;\n }\n\n \/* ========================================\n Source Citations\n ======================================== *\/\n .sources {\n background: var(--bg-secondary);\n border: 1px solid var(--border-color);\n border-radius: 10px;\n padding: 1.5rem;\n margin: 2rem 0;\n }\n\n .sources h4 {\n font-size: 1rem;\n color: var(--accent-copper-light);\n margin-bottom: 1rem;\n display: flex;\n align-items: center;\n gap: 0.5rem;\n }\n\n .source-list {\n list-style: none;\n }\n\n .source-list li {\n padding: 0.6rem 0;\n border-bottom: 1px solid var(--border-color);\n font-size: 0.85rem;\n }\n\n .source-list li:last-child {\n border-bottom: none;\n }\n\n .source-list a {\n color: var(--accent-blue-light);\n text-decoration: none;\n transition: color 0.2s ease;\n }\n\n .source-list a:hover {\n color: var(--accent-copper-light);\n text-decoration: underline;\n }\n\n .source-org {\n color: var(--text-muted);\n font-size: 0.8rem;\n }\n\n \/* ========================================\n Comparison Table\n ======================================== *\/\n .comparison-table th {\n font-size: 0.85rem;\n }\n\n .comparison-table .highlight {\n background: rgba(200, 117, 51, 0.15);\n }\n\n .badge {\n display: inline-block;\n padding: 0.25rem 0.6rem;\n border-radius: 4px;\n font-size: 0.75rem;\n font-weight: 600;\n }\n\n .badge-recommended {\n background: var(--success);\n color: white;\n }\n\n .badge-caution {\n background: var(--warning);\n color: white;\n }\n\n \/* ========================================\n Standards Box\n ======================================== *\/\n .standards-grid {\n display: grid;\n grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));\n gap: 1rem;\n margin: 1.5rem 0;\n }\n\n .standard-item {\n background: var(--bg-tertiary);\n border: 1px solid var(--border-color);\n border-radius: 8px;\n padding: 1rem;\n text-align: center;\n }\n\n .standard-code {\n font-family: var(--font-english);\n font-size: 1rem;\n font-weight: 700;\n color: var(--accent-gold);\n direction: ltr;\n }\n\n .standard-name {\n font-size: 0.8rem;\n color: var(--text-muted);\n margin-top: 0.3rem;\n }\n\n \/* ========================================\n Contact Section\n ======================================== *\/\n .contact-section {\n background: linear-gradient(145deg, var(--bg-tertiary) 0%, var(--bg-secondary) 100%);\n border: 2px solid var(--accent-copper);\n border-radius: 12px;\n padding: 2.5rem;\n text-align: center;\n }\n\n .contact-section h3 {\n color: var(--accent-copper-light);\n margin-bottom: 1.5rem;\n }\n\n .contact-grid {\n display: grid;\n grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));\n gap: 1.5rem;\n margin-top: 1.5rem;\n }\n\n .contact-card {\n background: var(--bg-primary);\n border-radius: 10px;\n padding: 1.5rem;\n text-align: center;\n }\n\n .contact-card svg {\n width: 32px;\n height: 32px;\n fill: var(--accent-copper-light);\n margin-bottom: 0.8rem;\n }\n\n .contact-card h4 {\n font-size: 0.9rem;\n color: var(--text-primary);\n margin-bottom: 0.5rem;\n }\n\n .contact-card a {\n color: var(--accent-blue-light);\n text-decoration: none;\n font-size: 0.9rem;\n word-break: break-all;\n }\n\n .contact-card a:hover {\n color: var(--accent-copper-light);\n }\n\n .whatsapp-btn {\n display: inline-flex;\n align-items: center;\n gap: 0.8rem;\n background: #25D366;\n color: white;\n padding: 1rem 2rem;\n border-radius: 50px;\n text-decoration: none;\n font-weight: 600;\n font-size: 1rem;\n margin-top: 1.5rem;\n transition: transform 0.2s ease, box-shadow 0.2s ease;\n }\n\n .whatsapp-btn:hover {\n transform: translateY(-2px);\n box-shadow: 0 8px 25px rgba(37, 211, 102, 0.3);\n }\n\n .whatsapp-btn svg {\n width: 24px;\n height: 24px;\n fill: white;\n }\n\n \/* ========================================\n Footer\n ======================================== *\/\n footer {\n background: var(--bg-secondary);\n border-top: 1px solid var(--border-color);\n padding: 2rem var(--content-padding);\n text-align: center;\n color: var(--text-muted);\n font-size: 0.85rem;\n }\n\n footer a {\n color: var(--accent-copper-light);\n text-decoration: none;\n }\n\n footer a:hover {\n text-decoration: underline;\n }\n\n \/* ========================================\n Responsive Design\n ======================================== *\/\n @media (max-width: 768px) {\n .header-content {\n flex-direction: column;\n text-align: center;\n }\n\n .contact-bar {\n justify-content: center;\n }\n\n .hero {\n padding: 1.5rem;\n }\n\n .section {\n padding: 1.5rem;\n }\n\n table {\n font-size: 0.8rem;\n }\n\n th, td {\n padding: 0.6rem 0.4rem;\n }\n\n .param-value {\n font-size: 1.3rem;\n }\n }\n\n \/* ========================================\n Print Styles\n ======================================== *\/\n @media print {\n body {\n background: white;\n color: black;\n }\n\n .section, .hero {\n border: 1px solid #ccc;\n background: white;\n }\n }\n <\/style>\n<\/head>\n<body>\n \n <header>\n <div class=\"header-content\">\n <div class=\"company-name\">\n <span class=\"ar\">\u0634\u0631\u0643\u0629 \u0623\u0646\u0647\u0648\u064a \u0641\u064a\u062a\u0634\u0648\u0646 \u0644\u0644\u0643\u0627\u0628\u0644\u0627\u062a \u0627\u0644\u062e\u0627\u0635\u0629 \u0627\u0644\u0645\u062d\u062f\u0648\u062f\u0629<\/span>\n <span class=\"zh\">\u5b89\u5fbd\u98db\u7d14\u7279\u7a2e\u96fb\u7e9c\u6709\u9650\u516c\u53f8<\/span>\n <span class=\"en\">Anhui Feichun Special Cable Co., Ltd.<\/span>\n <\/div>\n <div class=\"contact-bar\">\n <a href=\"https:\/\/wa.me\/8613855123218\" class=\"contact-item\" rel=\"nofollow noopener\" target=\"_blank\">\n <svg viewBox=\"0 0 24 24\"><path d=\"M17.472 14.382c-.297-.149-1.758-.867-2.03-.967-.273-.099-.471-.148-.67.15-.197.297-.767.966-.94 1.164-.173.199-.347.223-.644.075-.297-.15-1.255-.463-2.39-1.475-.883-.788-1.48-1.761-1.653-2.059-.173-.297-.018-.458.13-.606.134-.133.298-.347.446-.52.149-.174.198-.298.298-.497.099-.198.05-.371-.025-.52-.075-.149-.669-1.612-.916-2.207-.242-.579-.487-.5-.669-.51-.173-.008-.371-.01-.57-.01-.198 0-.52.074-.792.372-.272.297-1.04 1.016-1.04 2.479 0 1.462 1.065 2.875 1.213 3.074.149.198 2.096 3.2 5.077 4.487.709.306 1.262.489 1.694.625.712.227 1.36.195 1.871.118.571-.085 1.758-.719 2.006-1.413.248-.694.248-1.289.173-1.413-.074-.124-.272-.198-.57-.347m-5.421 7.403h-.004a9.87 9.87 0 01-5.031-1.378l-.361-.214-3.741.982.998-3.648-.235-.374a9.86 9.86 0 01-1.51-5.26c.001-5.45 4.436-9.884 9.888-9.884 2.64 0 5.122 1.03 6.988 2.898a9.825 9.825 0 012.893 6.994c-.003 5.45-4.437 9.884-9.885 9.884m8.413-18.297A11.815 11.815 0 0012.05 0C5.495 0 .16 5.335.157 11.892c0 2.096.547 4.142 1.588 5.945L.057 24l6.305-1.654a11.882 11.882 0 005.683 1.448h.005c6.554 0 11.89-5.335 11.893-11.893a11.821 11.821 0 00-3.48-8.413z\"\/><\/svg>\n <span style=\"direction:ltr\">+86 138 5512 3218<\/span>\n <\/a>\n <a href=\"mailto:tech@feichuncables.com\" class=\"contact-item\" rel=\"nofollow\">\n <svg viewBox=\"0 0 24 24\"><path d=\"M20 4H4c-1.1 0-1.99.9-1.99 2L2 18c0 1.1.9 2 2 2h16c1.1 0 2-.9 2-2V6c0-1.1-.9-2-2-2zm0 4l-8 5-8-5V6l8 5 8-5v2z\"\/><\/svg>\n <span style=\"direction:ltr\">tech@feichuncables.com<\/span>\n <\/a>\n <\/div>\n <\/div>\n <\/header>\n\n \n <main>\n \n <section class=\"hero\">\n <h1 class=\"lang-ar\">\u0643\u064a\u0641\u064a\u0629 \u0627\u062e\u062a\u064a\u0627\u0631 \u0645\u0642\u0627\u0633 \u0627\u0644\u0645\u0648\u0635\u0644 \u0644\u0645\u0639\u062f\u0627\u062a \u0627\u0644\u0623\u0646\u0641\u0627\u0642 \u0639\u0627\u0644\u064a\u0629 \u0627\u0644\u062a\u064a\u0627\u0631 \u0648\u0628\u0643\u0631\u0627\u062a \u0627\u0644\u0643\u0627\u0628\u0644\u0627\u062a\u061f<\/h1>\n <div class=\"explain-zh\">\n <span class=\"lang-label zh\">\u7e41\u9ad4\u4e2d\u6587<\/span>\n \u5982\u4f55\u70ba\u9ad8\u96fb\u6d41\u96a7\u9053\u8a2d\u5099\u548c\u96fb\u7e9c\u6372\u76e4\u9078\u64c7\u5c0e\u9ad4\u5c3a\u5bf8\uff1f\u9019\u662f\u4e00\u500b\u6d89\u53ca\u96fb\u6c23\u5de5\u7a0b\u3001\u71b1\u529b\u5b78\u548c\u6a5f\u68b0\u8a2d\u8a08\u7684\u7d9c\u5408\u6280\u8853\u554f\u984c\u3002\n <\/div>\n <div class=\"explain-en\">\n <span class=\"lang-label en\">English<\/span>\n How do you select conductor size for high-current tunnelling equipment and cable reels? This is a comprehensive technical question involving electrical engineering, thermodynamics, and mechanical design.\n <\/div>\n <p class=\"hero-subtitle\">\u062f\u0644\u064a\u0644 \u062a\u0642\u0646\u064a \u0634\u0627\u0645\u0644 \u0645\u0646 \u0634\u0631\u0643\u0629 \u0623\u0646\u0647\u0648\u064a \u0641\u064a\u062a\u0634\u0648\u0646 \u0644\u0644\u0643\u0627\u0628\u0644\u0627\u062a \u0627\u0644\u062e\u0627\u0635\u0629 \u0627\u0644\u0645\u062d\u062f\u0648\u062f\u0629<\/p>\n <\/section>\n\n \n <section class=\"section\">\n <div class=\"section-header\">\n <div class=\"section-icon\">\n <svg viewBox=\"0 0 24 24\"><path d=\"M12 2C6.48 2 2 6.48 2 12s4.48 10 10 10 10-4.48 10-10S17.52 2 12 2zm-2 15l-5-5 1.41-1.41L10 14.17l7.59-7.59L19 8l-9 9z\"\/><\/svg>\n <\/div>\n <h2 class=\"lang-ar\">\u0627\u0644\u0645\u0642\u062f\u0645\u0629 \u0648\u0627\u0644\u0623\u0647\u0645\u064a\u0629<\/h2>\n <\/div>\n \n <p class=\"lang-ar\">\u064a\u0639\u062f \u0627\u062e\u062a\u064a\u0627\u0631 \u0645\u0642\u0627\u0633 \u0627\u0644\u0645\u0648\u0635\u0644 \u0627\u0644\u0635\u062d\u064a\u062d \u0644\u0644\u0643\u0627\u0628\u0644\u0627\u062a \u0627\u0644\u0645\u0633\u062a\u062e\u062f\u0645\u0629 \u0641\u064a \u0645\u0639\u062f\u0627\u062a \u062d\u0641\u0631 \u0627\u0644\u0623\u0646\u0641\u0627\u0642 \u0648\u0628\u0643\u0631\u0627\u062a \u0627\u0644\u0643\u0627\u0628\u0644\u0627\u062a \u0623\u0645\u0631\u0627\u064b \u0628\u0627\u0644\u063a \u0627\u0644\u0623\u0647\u0645\u064a\u0629 \u0644\u0636\u0645\u0627\u0646 \u0627\u0644\u0633\u0644\u0627\u0645\u0629 \u0648\u0627\u0644\u0643\u0641\u0627\u0621\u0629 \u0627\u0644\u062a\u0634\u063a\u064a\u0644\u064a\u0629. \u062a\u062a\u0639\u0631\u0636 \u0647\u0630\u0647 \u0627\u0644\u0643\u0627\u0628\u0644\u0627\u062a \u0644\u0638\u0631\u0648\u0641 \u0642\u0627\u0633\u064a\u0629 \u062a\u0634\u0645\u0644 \u0627\u0644\u062a\u064a\u0627\u0631\u0627\u062a \u0627\u0644\u0639\u0627\u0644\u064a\u0629 \u0648\u0627\u0644\u0625\u062c\u0647\u0627\u062f \u0627\u0644\u0645\u064a\u0643\u0627\u0646\u064a\u0643\u064a \u0648\u062f\u0631\u062c\u0627\u062a \u0627\u0644\u062d\u0631\u0627\u0631\u0629 \u0627\u0644\u0645\u0631\u062a\u0641\u0639\u0629.<\/p>\n \n <div class=\"explain-zh\">\n <span class=\"lang-label zh\">\u7e41\u9ad4\u4e2d\u6587\u8aaa\u660e<\/span>\n \u70ba\u96a7\u9053\u6398\u9032\u8a2d\u5099\u548c\u96fb\u7e9c\u6372\u76e4\u9078\u64c7\u6b63\u78ba\u7684\u5c0e\u9ad4\u5c3a\u5bf8\u5c0d\u65bc\u78ba\u4fdd\u5b89\u5168\u6027\u548c\u904b\u884c\u6548\u7387\u81f3\u95dc\u91cd\u8981\u3002\u9019\u4e9b\u96fb\u7e9c\u627f\u53d7\u8457\u6975\u7aef\u689d\u4ef6\uff0c\u5305\u62ec\u9ad8\u96fb\u6d41\u3001\u6a5f\u68b0\u61c9\u529b\u548c\u9ad8\u6eab\u74b0\u5883\u3002\u6839\u64da\u570b\u969b\u96fb\u5de5\u59d4\u54e1\u6703\uff08IEC\uff09\u6a19\u6e96\uff0c\u5c0e\u9ad4\u9078\u64c7\u5fc5\u9808\u8003\u616e\u8f09\u6d41\u91cf\u3001\u96fb\u58d3\u964d\u3001\u77ed\u8def\u5bb9\u91cf\u548c\u74b0\u5883\u56e0\u7d20\u3002\n <\/div>\n \n <div class=\"explain-en\">\n <span class=\"lang-label en\">English Explanation<\/span>\n Selecting the correct conductor size for cables used in tunnel boring equipment and cable reels is critical for ensuring safety and operational efficiency. These cables are subjected to extreme conditions including high currents, mechanical stress, and elevated temperatures. According to International Electrotechnical Commission (IEC) standards, conductor selection must consider ampacity, voltage drop, short-circuit capacity, and environmental factors.\n <\/div>\n\n \n <div class=\"param-grid\">\n <div class=\"param-card\">\n <div class=\"param-label lang-ar\">\u0646\u0637\u0627\u0642 \u0627\u0644\u062a\u064a\u0627\u0631 \u0627\u0644\u0646\u0645\u0648\u0630\u062c\u064a<\/div>\n <div class=\"param-value\">100-630<\/div>\n <div class=\"param-unit\">A (Amperes)<\/div>\n <\/div>\n <div class=\"param-card\">\n <div class=\"param-label lang-ar\">\u0646\u0637\u0627\u0642 \u0627\u0644\u062c\u0647\u062f<\/div>\n <div class=\"param-value\">0.6\/1kV – 6\/10kV<\/div>\n <div class=\"param-unit\">Rated Voltage<\/div>\n <\/div>\n <div class=\"param-card\">\n <div class=\"param-label lang-ar\">\u062f\u0631\u062c\u0629 \u062d\u0631\u0627\u0631\u0629 \u0627\u0644\u062a\u0634\u063a\u064a\u0644<\/div>\n <div class=\"param-value\">-40\u00b0C ~ +90\u00b0C<\/div>\n <div class=\"param-unit\">Operating Range<\/div>\n <\/div>\n <div class=\"param-card\">\n <div class=\"param-label lang-ar\">\u0646\u0635\u0641 \u0642\u0637\u0631 \u0627\u0644\u0627\u0646\u062d\u0646\u0627\u0621 \u0627\u0644\u0623\u062f\u0646\u0649<\/div>\n <div class=\"param-value\">6\u00d7D ~ 8\u00d7D<\/div>\n <div class=\"param-unit\">D = Cable Diameter<\/div>\n <\/div>\n <\/div>\n <\/section>\n\n \n <section class=\"section\">\n <div class=\"section-header\">\n <div class=\"section-icon\">\n <svg viewBox=\"0 0 24 24\"><path d=\"M19 3H5c-1.1 0-2 .9-2 2v14c0 1.1.9 2 2 2h14c1.1 0 2-.9 2-2V5c0-1.1-.9-2-2-2zm-5 14h-2V9h-2V7h4v10z\"\/><\/svg>\n <\/div>\n <h2 class=\"lang-ar\">\u0645\u0646\u0647\u062c\u064a\u0629 \u062a\u062d\u062f\u064a\u062f \u0645\u0642\u0627\u0633 \u0627\u0644\u0645\u0648\u0635\u0644<\/h2>\n <\/div>\n\n <h3 class=\"lang-ar\">\u0661. \u062d\u0633\u0627\u0628 \u0633\u0639\u0629 \u0627\u0644\u062a\u064a\u0627\u0631 (Ampacity)<\/h3>\n <p class=\"lang-ar\">\u062a\u064f\u062d\u062f\u062f \u0633\u0639\u0629 \u0627\u0644\u062a\u064a\u0627\u0631 \u0628\u0646\u0627\u0621\u064b \u0639\u0644\u0649 \u0645\u0639\u0627\u062f\u0644\u0629 \u0646\u064a\u0647\u0631-\u0645\u0627\u0643\u063a\u0631\u0627\u062b \u0627\u0644\u0645\u0639\u062f\u0644\u0629 \u0648\u0641\u0642\u0627\u064b \u0644\u0645\u0639\u064a\u0627\u0631 IEC 60287:<\/p>\n \n <div class=\"formula-box\">\n <div class=\"formula\">I = \u221a[(\u0394\u03b8 – Wd \u00d7 (0.5\u00d7T1 + T2 + T3 + T4)) \/ (R \u00d7 T1 + R \u00d7 (1 + \u03bb1) \u00d7 T2 + R \u00d7 (1 + \u03bb1 + \u03bb2) \u00d7 (T3 + T4))]<\/div>\n <div class=\"formula-desc\">\n <span class=\"lang-en\">Where: I = Current rating (A), \u0394\u03b8 = Temperature rise (K), R = AC resistance (\u03a9\/m), T = Thermal resistance<\/span>\n <\/div>\n <\/div>\n\n <div class=\"explain-zh\">\n <span class=\"lang-label zh\">\u7e41\u9ad4\u4e2d\u6587\u8aaa\u660e<\/span>\n \u8f09\u6d41\u91cf\u8a08\u7b97\u57fa\u65bcIEC 60287\u6a19\u6e96\u4e2d\u4fee\u6539\u7684Neher-McGrath\u65b9\u7a0b\u3002\u6b64\u516c\u5f0f\u8003\u616e\u4e86\u5c0e\u9ad4\u96fb\u963b\u3001\u71b1\u963b\u3001\u4ecb\u8cea\u640d\u8017\u548c\u8b77\u5957\u640d\u8017\u7b49\u56e0\u7d20\u3002\u5c0d\u65bc\u96a7\u9053\u8a2d\u5099\uff0c\u74b0\u5883\u6eab\u5ea6\u6821\u6b63\u56e0\u6578\uff08K<sub>a<\/sub>\uff09\u901a\u5e38\u57280.82-0.94\u4e4b\u9593\u3002\n <\/div>\n\n <div class=\"explain-en\">\n <span class=\"lang-label en\">English Explanation<\/span>\n Ampacity calculation is based on the modified Neher-McGrath equation in IEC 60287. This formula accounts for conductor resistance, thermal resistance, dielectric losses, and sheath losses. For tunnelling equipment, the ambient temperature correction factor (K<sub>a<\/sub>) typically ranges from 0.82-0.94.\n <\/div>\n\n <h3 class=\"lang-ar\">\u0662. \u062d\u0633\u0627\u0628 \u0627\u0646\u062e\u0641\u0627\u0636 \u0627\u0644\u062c\u0647\u062f<\/h3>\n <p class=\"lang-ar\">\u064a\u062c\u0628 \u0623\u0644\u0627 \u064a\u062a\u062c\u0627\u0648\u0632 \u0627\u0646\u062e\u0641\u0627\u0636 \u0627\u0644\u062c\u0647\u062f 5% \u0644\u0644\u062f\u0648\u0627\u0626\u0631 \u0627\u0644\u0641\u0631\u0639\u064a\u0629 \u06483% \u0644\u0644\u0645\u063a\u0630\u064a\u0627\u062a \u0627\u0644\u0631\u0626\u064a\u0633\u064a\u0629 \u0648\u0641\u0642\u0627\u064b \u0644\u0645\u0639\u064a\u0627\u0631 IEEE 141:<\/p>\n\n <div class=\"formula-box\">\n <div class=\"formula\">\u0394V = \u221a3 \u00d7 I \u00d7 L \u00d7 (R\u00d7cos\u03c6 + X\u00d7sin\u03c6) \/ 1000<\/div>\n <div class=\"formula-desc\">\n <span class=\"lang-en\">Where: \u0394V = Voltage drop (V), I = Current (A), L = Length (m), R = Resistance (\u03a9\/km), X = Reactance (\u03a9\/km)<\/span>\n <\/div>\n <\/div>\n\n \n <h3 class=\"lang-ar\">\u0663. \u062c\u062f\u0648\u0644 \u0645\u0642\u0627\u0633\u0627\u062a \u0627\u0644\u0645\u0648\u0635\u0644 \u0648\u0627\u0644\u0645\u0639\u0644\u0645\u0627\u062a<\/h3>\n \n <div class=\"table-container\">\n <table class=\"comparison-table\">\n <thead>\n <tr>\n <th>\u0645\u0642\u0627\u0633 \u0627\u0644\u0645\u0648\u0635\u0644<br><span style=\"font-weight:400;font-size:0.8em\">Cross Section<\/span><\/th>\n <th>\u0633\u0639\u0629 \u0627\u0644\u062a\u064a\u0627\u0631 (\u0647\u0648\u0627\u0621)<br><span style=\"font-weight:400;font-size:0.8em\">Ampacity Air<\/span><\/th>\n <th>\u0627\u0644\u0645\u0642\u0627\u0648\u0645\u0629 20\u00b0C<br><span style=\"font-weight:400;font-size:0.8em\">Resistance<\/span><\/th>\n <th>\u0627\u0644\u062d\u062f \u0627\u0644\u0623\u0642\u0635\u0649 \u0644\u0644\u0637\u0648\u0644 (3%\u0394V)<br><span style=\"font-weight:400;font-size:0.8em\">Max Length<\/span><\/th>\n <th>\u0627\u0644\u062a\u0637\u0628\u064a\u0642 \u0627\u0644\u0645\u0648\u0635\u0649<br><span style=\"font-weight:400;font-size:0.8em\">Application<\/span><\/th>\n <\/tr>\n <\/thead>\n <tbody>\n <tr>\n <td>25 mm\u00b2<\/td>\n <td>110 A<\/td>\n <td>0.727 \u03a9\/km<\/td>\n <td>85 m<\/td>\n <td>Auxiliary Systems<\/td>\n <\/tr>\n <tr>\n <td>35 mm\u00b2<\/td>\n <td>137 A<\/td>\n <td>0.524 \u03a9\/km<\/td>\n <td>118 m<\/td>\n <td>Conveyor Motors<\/td>\n <\/tr>\n <tr>\n <td>50 mm\u00b2<\/td>\n <td>167 A<\/td>\n <td>0.387 \u03a9\/km<\/td>\n <td>160 m<\/td>\n <td>Ventilation Fans<\/td>\n <\/tr>\n <tr class=\"highlight\">\n <td>70 mm\u00b2<\/td>\n <td>207 A<\/td>\n <td>0.268 \u03a9\/km<\/td>\n <td>231 m<\/td>\n <td><span class=\"badge badge-recommended\">TBM Cutterhead<\/span><\/td>\n <\/tr>\n <tr class=\"highlight\">\n <td>95 mm\u00b2<\/td>\n <td>250 A<\/td>\n <td>0.193 \u03a9\/km<\/td>\n <td>321 m<\/td>\n <td><span class=\"badge badge-recommended\">Main Drive<\/span><\/td>\n <\/tr>\n <tr class=\"highlight\">\n <td>120 mm\u00b2<\/td>\n <td>289 A<\/td>\n <td>0.153 \u03a9\/km<\/td>\n <td>405 m<\/td>\n <td><span class=\"badge badge-recommended\">Primary Power<\/span><\/td>\n <\/tr>\n <tr>\n <td>150 mm\u00b2<\/td>\n <td>331 A<\/td>\n <td>0.124 \u03a9\/km<\/td>\n <td>500 m<\/td>\n <td>High Power TBM<\/td>\n <\/tr>\n <tr>\n <td>185 mm\u00b2<\/td>\n <td>379 A<\/td>\n <td>0.0991 \u03a9\/km<\/td>\n <td>625 m<\/td>\n <td>Extended Tunnel<\/td>\n <\/tr>\n <tr>\n <td>240 mm\u00b2<\/td>\n <td>447 A<\/td>\n <td>0.0754 \u03a9\/km<\/td>\n <td>822 m<\/td>\n <td>Large Scale TBM<\/td>\n <\/tr>\n <tr>\n <td>300 mm\u00b2<\/td>\n <td>514 A<\/td>\n <td>0.0601 \u03a9\/km<\/td>\n <td>1031 m<\/td>\n <td>Metro Projects<\/td>\n <\/tr>\n <\/tbody>\n <\/table>\n <\/div>\n \n <div class=\"table-note lang-en\" style=\"direction:ltr\">\n <strong>Reference:<\/strong> Values based on IEC 60502-1, copper conductor, EPR insulation, 90\u00b0C max conductor temperature, 40\u00b0C ambient, single cable in free air. Actual values may vary based on installation conditions.\n <\/div>\n\n <div class=\"sources\">\n <h4>\n <svg viewBox=\"0 0 24 24\" width=\"20\" height=\"20\" fill=\"currentColor\"><path d=\"M12 2C6.48 2 2 6.48 2 12s4.48 10 10 10 10-4.48 10-10S17.52 2 12 2zm1 15h-2v-2h2v2zm0-4h-2V7h2v6z\"\/><\/svg>\n \u0627\u0644\u0645\u0635\u0627\u062f\u0631 \u0648\u0627\u0644\u0645\u0631\u0627\u062c\u0639 \u0627\u0644\u0645\u0648\u062b\u0648\u0642\u0629 | Authoritative Sources\n <\/h4>\n <ul class=\"source-list\">\n <li>\n <a href=\"https:\/\/webstore.iec.ch\/publication\/2267\" rel=\"nofollow noopener\" target=\"_blank\">IEC 60502-1:2021 – Power cables with extruded insulation and their accessories<\/a>\n <span class=\"source-org\">International Electrotechnical Commission<\/span>\n <\/li>\n <li>\n <a href=\"https:\/\/webstore.iec.ch\/publication\/1447\" rel=\"nofollow noopener\" target=\"_blank\">IEC 60287-1-1 – Electric cables – Calculation of current rating<\/a>\n <span class=\"source-org\">International Electrotechnical Commission<\/span>\n <\/li>\n <li>\n <a href=\"https:\/\/standards.ieee.org\/ieee\/141\/1074\/\" rel=\"nofollow noopener\" target=\"_blank\">IEEE 141 (Red Book) – Recommended Practice for Electric Power Distribution<\/a>\n <span class=\"source-org\">Institute of Electrical and Electronics Engineers<\/span>\n <\/li>\n <\/ul>\n <\/div>\n <\/section>\n\n \n <section class=\"section\">\n <div class=\"section-header\">\n <div class=\"section-icon\">\n <svg viewBox=\"0 0 24 24\"><path d=\"M12 2C6.48 2 2 6.48 2 12s4.48 10 10 10 10-4.48 10-10S17.52 2 12 2zm0 18c-4.42 0-8-3.58-8-8s3.58-8 8-8 8 3.58 8 8-3.58 8-8 8z\"\/><circle cx=\"12\" cy=\"12\" r=\"5\"\/><\/svg>\n <\/div>\n <h2 class=\"lang-ar\">\u0627\u0639\u062a\u0628\u0627\u0631\u0627\u062a \u0628\u0643\u0631\u0627\u062a \u0627\u0644\u0643\u0627\u0628\u0644\u0627\u062a<\/h2>\n <\/div>\n\n <p class=\"lang-ar\">\u062a\u062a\u0637\u0644\u0628 \u0628\u0643\u0631\u0627\u062a \u0627\u0644\u0643\u0627\u0628\u0644\u0627\u062a (Cable Reels) \u0627\u0639\u062a\u0628\u0627\u0631\u0627\u062a \u062e\u0627\u0635\u0629 \u0646\u0638\u0631\u0627\u064b \u0644\u0644\u0636\u063a\u0648\u0637 \u0627\u0644\u0645\u064a\u0643\u0627\u0646\u064a\u0643\u064a\u0629 \u0627\u0644\u0625\u0636\u0627\u0641\u064a\u0629 \u0648\u062a\u0623\u062b\u064a\u0631\u0627\u062a \u0627\u0644\u062a\u0631\u0627\u0643\u0645 \u0627\u0644\u062d\u0631\u0627\u0631\u064a \u0639\u0646\u062f \u0644\u0641 \u0627\u0644\u0643\u0627\u0628\u0644.<\/p>\n\n <div class=\"explain-zh\">\n <span class=\"lang-label zh\">\u7e41\u9ad4\u4e2d\u6587\u8aaa\u660e<\/span>\n \u96fb\u7e9c\u6372\u76e4\u9700\u8981\u7279\u5225\u8003\u616e\uff0c\u56e0\u70ba\u7e8f\u7e5e\u96fb\u7e9c\u6642\u6703\u7522\u751f\u984d\u5916\u7684\u6a5f\u68b0\u61c9\u529b\u548c\u71b1\u7a4d\u805a\u6548\u61c9\u3002\u6839\u64da\u5fb7\u570bDIN\u6a19\u6e96\u548cAS\/NZS 3008.1.1\uff0c\u6372\u7e5e\u5728\u6372\u76e4\u4e0a\u7684\u96fb\u7e9c\u8f09\u6d41\u91cf\u5fc5\u9808\u964d\u984d\u3002\u964d\u984d\u56e0\u6578\u53d6\u6c7a\u65bc\u7e8f\u7e5e\u5c64\u6578\uff1a\u55ae\u5c64\u70ba0.85\uff0c\u96d9\u5c64\u70ba0.65\uff0c\u4e09\u5c64\u53ca\u4ee5\u4e0a\u70ba0.45-0.55\u3002\n <\/div>\n\n <div class=\"explain-en\">\n <span class=\"lang-label en\">English Explanation<\/span>\n Cable reels require special considerations due to additional mechanical stresses and thermal accumulation effects when cable is wound. According to German DIN standards and AS\/NZS 3008.1.1, cables wound on reels must have their ampacity derated. The derating factor depends on the number of wound layers: 0.85 for single layer, 0.65 for double layer, and 0.45-0.55 for three or more layers.\n <\/div>\n\n \n <h3 class=\"lang-ar\">\u0645\u0639\u0627\u0645\u0644\u0627\u062a \u062a\u062e\u0641\u064a\u0636 \u0627\u0644\u062a\u064a\u0627\u0631 \u0644\u0628\u0643\u0631\u0627\u062a \u0627\u0644\u0643\u0627\u0628\u0644\u0627\u062a<\/h3>\n \n <div class=\"table-container\">\n <table>\n <thead>\n <tr>\n <th>\u0639\u062f\u062f \u0627\u0644\u0637\u0628\u0642\u0627\u062a<br><span style=\"font-weight:400;font-size:0.8em\">Layers<\/span><\/th>\n <th>\u0645\u0639\u0627\u0645\u0644 \u0627\u0644\u062a\u062e\u0641\u064a\u0636<br><span style=\"font-weight:400;font-size:0.8em\">Derating Factor<\/span><\/th>\n <th>\u0633\u0639\u0629 \u0627\u0644\u062a\u064a\u0627\u0631 \u0627\u0644\u0641\u0639\u0644\u064a\u0629 (95mm\u00b2)<br><span style=\"font-weight:400;font-size:0.8em\">Effective Ampacity<\/span><\/th>\n <th>\u0627\u0644\u062d\u0627\u0644\u0629<br><span style=\"font-weight:400;font-size:0.8em\">Condition<\/span><\/th>\n <\/tr>\n <\/thead>\n <tbody>\n <tr>\n <td>Fully Unwound<\/td>\n <td>1.00<\/td>\n <td>250 A<\/td>\n <td><span class=\"badge badge-recommended\">Optimal<\/span><\/td>\n <\/tr>\n <tr>\n <td>1 Layer<\/td>\n <td>0.85<\/td>\n <td>212 A<\/td>\n <td>Acceptable<\/td>\n <\/tr>\n <tr>\n <td>2 Layers<\/td>\n <td>0.65<\/td>\n <td>162 A<\/td>\n <td><span class=\"badge badge-caution\">Monitor<\/span><\/td>\n <\/tr>\n <tr>\n <td>3+ Layers<\/td>\n <td>0.45-0.55<\/td>\n <td>112-137 A<\/td>\n <td><span class=\"badge badge-caution\">Caution<\/span><\/td>\n <\/tr>\n <\/tbody>\n <\/table>\n <\/div>\n\n \n <h3 class=\"lang-ar\">\u0627\u0644\u0645\u062a\u0637\u0644\u0628\u0627\u062a \u0627\u0644\u0645\u064a\u0643\u0627\u0646\u064a\u0643\u064a\u0629 \u0644\u0644\u0643\u0627\u0628\u0644\u0627\u062a \u0627\u0644\u0645\u062a\u062d\u0631\u0643\u0629<\/h3>\n \n <div class=\"param-grid\">\n <div class=\"param-card\">\n <div class=\"param-label lang-ar\">\u062f\u0648\u0631\u0627\u062a \u0627\u0644\u0627\u0646\u062d\u0646\u0627\u0621<\/div>\n <div class=\"param-value\">>50,000<\/div>\n <div class=\"param-unit\">Bending Cycles<\/div>\n <\/div>\n <div class=\"param-card\">\n <div class=\"param-label lang-ar\">\u0645\u0642\u0627\u0648\u0645\u0629 \u0627\u0644\u0634\u062f<\/div>\n <div class=\"param-value\">15 N\/mm\u00b2<\/div>\n <div class=\"param-unit\">Tensile Strength<\/div>\n <\/div>\n <div class=\"param-card\">\n <div class=\"param-label lang-ar\">\u0645\u0642\u0627\u0648\u0645\u0629 \u0627\u0644\u062a\u0648\u0627\u0621<\/div>\n <div class=\"param-value\">\u00b1180\u00b0\/m<\/div>\n <div class=\"param-unit\">Torsion Resistance<\/div>\n <\/div>\n <div class=\"param-card\">\n <div class=\"param-label lang-ar\">\u0633\u0631\u0639\u0629 \u0627\u0644\u062a\u0645\u062f\u064a\u062f<\/div>\n <div class=\"param-value\">\u226460 m\/min<\/div>\n <div class=\"param-unit\">Travel Speed<\/div>\n <\/div>\n <\/div>\n\n <div class=\"sources\">\n <h4>\n <svg viewBox=\"0 0 24 24\" width=\"20\" height=\"20\" fill=\"currentColor\"><path d=\"M12 2C6.48 2 2 6.48 2 12s4.48 10 10 10 10-4.48 10-10S17.52 2 12 2zm1 15h-2v-2h2v2zm0-4h-2V7h2v6z\"\/><\/svg>\n \u0627\u0644\u0645\u0635\u0627\u062f\u0631 \u0648\u0627\u0644\u0645\u0631\u0627\u062c\u0639 | References\n <\/h4>\n <ul class=\"source-list\">\n <li>\n <a href=\"https:\/\/www.standards.org.au\/standards-catalogue\/sa-snz\/electrotechnology\/el-001\/as-slash-nzs--3008-dot-1-dot-1-2017\" rel=\"nofollow noopener\" target=\"_blank\">AS\/NZS 3008.1.1:2017 – Electrical installations – Selection of cables<\/a>\n <span class=\"source-org\">Standards Australia \/ Standards New Zealand<\/span>\n <\/li>\n <li>\n <a href=\"https:\/\/www.din.de\/en\/getting-involved\/standards-committees\/dke\/publications\" rel=\"nofollow noopener\" target=\"_blank\">DIN VDE 0298-4 – Application of cables and insulated cords in power installations<\/a>\n <span class=\"source-org\">Deutsches Institut f\u00fcr Normung<\/span>\n <\/li>\n <li>\n <a href=\"https:\/\/www.nfpa.org\/codes-and-standards\/all-codes-and-standards\/list-of-codes-and-standards\/detail?code=70\" rel=\"nofollow noopener\" target=\"_blank\">NFPA 70 (NEC) – National Electrical Code<\/a>\n <span class=\"source-org\">National Fire Protection Association<\/span>\n <\/li>\n <\/ul>\n <\/div>\n <\/section>\n\n \n <section class=\"section\">\n <div class=\"section-header\">\n <div class=\"section-icon\">\n <svg viewBox=\"0 0 24 24\"><path d=\"M3 13h2v-2H3v2zm0 4h2v-2H3v2zm0-8h2V7H3v2zm4 4h14v-2H7v2zm0 4h14v-2H7v2zM7 7v2h14V7H7z\"\/><\/svg>\n <\/div>\n <h2 class=\"lang-ar\">\u0627\u062e\u062a\u064a\u0627\u0631 \u0627\u0644\u0645\u0648\u0627\u062f \u0648\u0627\u0644\u062e\u0635\u0627\u0626\u0635<\/h2>\n <\/div>\n\n <p class=\"lang-ar\">\u064a\u0624\u062b\u0631 \u0627\u062e\u062a\u064a\u0627\u0631 \u0645\u0627\u062f\u0629 \u0627\u0644\u0645\u0648\u0635\u0644 \u0648\u0627\u0644\u0639\u0632\u0644 \u0628\u0634\u0643\u0644 \u0643\u0628\u064a\u0631 \u0639\u0644\u0649 \u0623\u062f\u0627\u0621 \u0627\u0644\u0643\u0627\u0628\u0644 \u0641\u064a \u062a\u0637\u0628\u064a\u0642\u0627\u062a \u062d\u0641\u0631 \u0627\u0644\u0623\u0646\u0641\u0627\u0642.<\/p>\n\n <div class=\"explain-zh\">\n <span class=\"lang-label zh\">\u7e41\u9ad4\u4e2d\u6587\u8aaa\u660e<\/span>\n \u5c0e\u9ad4\u548c\u7d55\u7de3\u6750\u6599\u7684\u9078\u64c7\u5c0d\u96a7\u9053\u6398\u9032\u61c9\u7528\u4e2d\u7684\u96fb\u7e9c\u6027\u80fd\u6709\u91cd\u5927\u5f71\u97ff\u3002\u9285\u5c0e\u9ad4\u56e0\u5176\u512a\u7570\u7684\u5c0e\u96fb\u6027\uff0858 MS\/m\uff09\u88ab\u5ee3\u6cdb\u4f7f\u7528\uff0c\u800c\u92c1\u5c0e\u9ad4\u5728\u9700\u8981\u6e1b\u91cd\u7684\u5834\u5408\u4e5f\u6709\u61c9\u7528\u3002\u5c0d\u65bc\u7d55\u7de3\u5c64\uff0c\u4e59\u4e19\u6a61\u81a0\uff08EPR\uff09\u548c\u4ea4\u806f\u805a\u4e59\u70ef\uff08XLPE\uff09\u662f\u6700\u5e38\u898b\u7684\u9078\u64c7\uff0c\u5169\u8005\u90fd\u80fd\u627f\u53d790\u00b0C\u7684\u6301\u7e8c\u5de5\u4f5c\u6eab\u5ea6\u3002\n <\/div>\n\n <div class=\"explain-en\">\n <span class=\"lang-label en\">English Explanation<\/span>\n The selection of conductor and insulation materials significantly impacts cable performance in tunnelling applications. Copper conductors are widely used due to their excellent conductivity (58 MS\/m), while aluminum conductors are also applied where weight reduction is needed. For insulation, Ethylene Propylene Rubber (EPR) and Cross-linked Polyethylene (XLPE) are the most common choices, both capable of withstanding 90\u00b0C continuous operating temperature.\n <\/div>\n\n \n <h3 class=\"lang-ar\">\u0645\u0642\u0627\u0631\u0646\u0629 \u0645\u0648\u0627\u062f \u0627\u0644\u0645\u0648\u0635\u0644<\/h3>\n \n <div class=\"table-container\">\n <table>\n <thead>\n <tr>\n <th>\u0627\u0644\u0645\u0639\u0644\u0645\u0629<br><span style=\"font-weight:400;font-size:0.8em\">Parameter<\/span><\/th>\n <th>\u0627\u0644\u0646\u062d\u0627\u0633 (Cu)<br><span style=\"font-weight:400;font-size:0.8em\">Copper<\/span><\/th>\n <th>\u0627\u0644\u0623\u0644\u0645\u0646\u064a\u0648\u0645 (Al)<br><span style=\"font-weight:400;font-size:0.8em\">Aluminum<\/span><\/th>\n <th>\u0627\u0644\u0648\u062d\u062f\u0629<br><span style=\"font-weight:400;font-size:0.8em\">Unit<\/span><\/th>\n <\/tr>\n <\/thead>\n <tbody>\n <tr>\n <td>\u0627\u0644\u0645\u0648\u0635\u0644\u064a\u0629 \u0627\u0644\u0643\u0647\u0631\u0628\u0627\u0626\u064a\u0629<\/td>\n <td>58<\/td>\n <td>35<\/td>\n <td>MS\/m<\/td>\n <\/tr>\n <tr>\n <td>\u0627\u0644\u0645\u0642\u0627\u0648\u0645\u0629 \u0627\u0644\u0646\u0648\u0639\u064a\u0629 (20\u00b0C)<\/td>\n <td>0.01724<\/td>\n <td>0.02826<\/td>\n <td>\u03a9\u00b7mm\u00b2\/m<\/td>\n <\/tr>\n <tr>\n <td>\u0627\u0644\u0643\u062b\u0627\u0641\u0629<\/td>\n <td>8.89<\/td>\n <td>2.70<\/td>\n <td>g\/cm\u00b3<\/td>\n <\/tr>\n <tr>\n <td>\u0645\u0639\u0627\u0645\u0644 \u062f\u0631\u062c\u0629 \u0627\u0644\u062d\u0631\u0627\u0631\u0629<\/td>\n <td>0.00393<\/td>\n <td>0.00403<\/td>\n <td>1\/K<\/td>\n <\/tr>\n <tr>\n <td>\u062f\u0631\u062c\u0629 \u062d\u0631\u0627\u0631\u0629 \u0642\u0635\u064a\u0631\u0629 \u0627\u0644\u0645\u062f\u0629<\/td>\n <td>250<\/td>\n <td>250<\/td>\n <td>\u00b0C<\/td>\n <\/tr>\n <\/tbody>\n <\/table>\n <\/div>\n\n \n <h3 class=\"lang-ar\">\u0645\u0642\u0627\u0631\u0646\u0629 \u0645\u0648\u0627\u062f \u0627\u0644\u0639\u0632\u0644<\/h3>\n \n <div class=\"table-container\">\n <table>\n <thead>\n <tr>\n <th>\u0627\u0644\u0645\u0639\u0644\u0645\u0629<br><span style=\"font-weight:400;font-size:0.8em\">Parameter<\/span><\/th>\n <th>EPR<br><span style=\"font-weight:400;font-size:0.8em\">\u0625\u064a\u062b\u064a\u0644\u064a\u0646 \u0628\u0631\u0648\u0628\u064a\u0644\u064a\u0646<\/span><\/th>\n <th>XLPE<br><span style=\"font-weight:400;font-size:0.8em\">\u0628\u0648\u0644\u064a \u0625\u064a\u062b\u064a\u0644\u064a\u0646 \u0645\u062a\u0634\u0627\u0628\u0643<\/span><\/th>\n <th>NBR\/SBR<br><span style=\"font-weight:400;font-size:0.8em\">\u0645\u0637\u0627\u0637<\/span><\/th>\n <\/tr>\n <\/thead>\n <tbody>\n <tr>\n <td>\u062f\u0631\u062c\u0629 \u062d\u0631\u0627\u0631\u0629 \u0627\u0644\u062a\u0634\u063a\u064a\u0644 \u0627\u0644\u0642\u0635\u0648\u0649<\/td>\n <td>90\u00b0C<\/td>\n <td>90\u00b0C<\/td>\n <td>85\u00b0C<\/td>\n <\/tr>\n <tr>\n <td>\u062f\u0631\u062c\u0629 \u062d\u0631\u0627\u0631\u0629 \u0627\u0644\u062f\u0627\u0626\u0631\u0629 \u0627\u0644\u0642\u0635\u064a\u0631\u0629<\/td>\n <td>250\u00b0C<\/td>\n <td>250\u00b0C<\/td>\n <td>200\u00b0C<\/td>\n <\/tr>\n <tr>\n <td>\u062b\u0627\u0628\u062a \u0627\u0644\u0639\u0632\u0644 (\u03b5r)<\/td>\n <td>2.5-3.5<\/td>\n <td>2.3<\/td>\n <td>4-8<\/td>\n <\/tr>\n <tr>\n <td>\u0645\u0642\u0627\u0648\u0645\u0629 \u0627\u0644\u0632\u064a\u0648\u062a<\/td>\n <td>\u062c\u064a\u062f\u0629<\/td>\n <td>\u0645\u062a\u0648\u0633\u0637\u0629<\/td>\n <td>\u0645\u0645\u062a\u0627\u0632\u0629<\/td>\n <\/tr>\n <tr>\n <td>\u0627\u0644\u0645\u0631\u0648\u0646\u0629 \u0641\u064a \u062f\u0631\u062c\u0627\u062a \u0627\u0644\u062d\u0631\u0627\u0631\u0629 \u0627\u0644\u0645\u0646\u062e\u0641\u0636\u0629<\/td>\n <td>\u0645\u0645\u062a\u0627\u0632\u0629<\/td>\n <td>\u062c\u064a\u062f\u0629<\/td>\n <td>\u0645\u0645\u062a\u0627\u0632\u0629<\/td>\n <\/tr>\n <\/tbody>\n <\/table>\n <\/div>\n\n <div class=\"sources\">\n <h4>\n <svg viewBox=\"0 0 24 24\" width=\"20\" height=\"20\" fill=\"currentColor\"><path d=\"M12 2C6.48 2 2 6.48 2 12s4.48 10 10 10 10-4.48 10-10S17.52 2 12 2zm1 15h-2v-2h2v2zm0-4h-2V7h2v6z\"\/><\/svg>\n \u0627\u0644\u0645\u0635\u0627\u062f\u0631 \u0648\u0627\u0644\u0645\u0631\u0627\u062c\u0639 | References\n <\/h4>\n <ul class=\"source-list\">\n <li>\n <a href=\"https:\/\/www.iso.org\/standard\/76270.html\" rel=\"nofollow noopener\" target=\"_blank\">ISO 6722 – Road vehicles – 60 V and 600 V single-core cables<\/a>\n <span class=\"source-org\">International Organization for Standardization<\/span>\n <\/li>\n <li>\n <a href=\"https:\/\/www.astm.org\/b0003-13r19.html\" rel=\"nofollow noopener\" target=\"_blank\">ASTM B3-13 – Standard Specification for Soft or Annealed Copper Wire<\/a>\n <span class=\"source-org\">ASTM International<\/span>\n <\/li>\n <li>\n <a href=\"https:\/\/openstd.samr.gov.cn\/bzgk\/gb\/index\" rel=\"nofollow noopener\" target=\"_blank\">GB\/T 12972 – Mining Cables for Rated Voltages up to and including 8.7\/15 kV<\/a>\n <span class=\"source-org\">\u56fd\u5bb6\u5e02\u573a\u76d1\u7763\u7ba1\u7406\u603b\u5c40 (SAMR)<\/span>\n <\/li>\n <\/ul>\n <\/div>\n <\/section>\n\n \n <section class=\"section\">\n <div class=\"section-header\">\n <div class=\"section-icon\">\n <svg viewBox=\"0 0 24 24\"><path d=\"M14 2H6c-1.1 0-1.99.9-1.99 2L4 20c0 1.1.89 2 1.99 2H18c1.1 0 2-.9 2-2V8l-6-6zm2 16H8v-2h8v2zm0-4H8v-2h8v2zm-3-5V3.5L18.5 9H13z\"\/><\/svg>\n <\/div>\n <h2 class=\"lang-ar\">\u0645\u0639\u0627\u064a\u064a\u0631 \u0627\u0644\u062a\u0646\u0641\u064a\u0630 \u0627\u0644\u0645\u0639\u0645\u0648\u0644 \u0628\u0647\u0627<\/h2>\n <\/div>\n\n <p class=\"lang-ar\">\u064a\u062c\u0628 \u0623\u0646 \u062a\u0645\u062a\u062b\u0644 \u0627\u0644\u0643\u0627\u0628\u0644\u0627\u062a \u0627\u0644\u0645\u0633\u062a\u062e\u062f\u0645\u0629 \u0641\u064a \u0645\u0639\u062f\u0627\u062a \u062d\u0641\u0631 \u0627\u0644\u0623\u0646\u0641\u0627\u0642 \u0644\u0644\u0645\u0639\u0627\u064a\u064a\u0631 \u0627\u0644\u062f\u0648\u0644\u064a\u0629 \u0648\u0627\u0644\u0648\u0637\u0646\u064a\u0629 \u0627\u0644\u062a\u0627\u0644\u064a\u0629:<\/p>\n\n <div class=\"explain-zh\">\n <span class=\"lang-label zh\">\u7e41\u9ad4\u4e2d\u6587\u8aaa\u660e<\/span>\n \u7528\u65bc\u96a7\u9053\u6398\u9032\u8a2d\u5099\u7684\u96fb\u7e9c\u5fc5\u9808\u7b26\u5408\u4ee5\u4e0b\u570b\u969b\u548c\u570b\u5bb6\u6a19\u6e96\u3002\u9019\u4e9b\u6a19\u6e96\u6db5\u84cb\u96fb\u6c23\u6027\u80fd\u3001\u6a5f\u68b0\u7279\u6027\u3001\u963b\u71c3\u6027\u80fd\u548c\u74b0\u5883\u9069\u61c9\u6027\u7b49\u65b9\u9762\u7684\u8981\u6c42\u3002\n <\/div>\n\n <div class=\"explain-en\">\n <span class=\"lang-label en\">English Explanation<\/span>\n Cables used in tunnel boring equipment must comply with the following international and national standards. These standards cover requirements for electrical performance, mechanical characteristics, flame retardancy, and environmental adaptability.\n <\/div>\n\n <div class=\"standards-grid\">\n <div class=\"standard-item\">\n <div class=\"standard-code\">IEC 60502<\/div>\n <div class=\"standard-name\">Power cables with extruded insulation<\/div>\n <\/div>\n <div class=\"standard-item\">\n <div class=\"standard-code\">IEC 60227<\/div>\n <div class=\"standard-name\">PVC insulated cables of rated voltages<\/div>\n <\/div>\n <div class=\"standard-item\">\n <div class=\"standard-code\">IEC 60245<\/div>\n <div class=\"standard-name\">Rubber insulated cables<\/div>\n <\/div>\n <div class=\"standard-item\">\n <div class=\"standard-code\">IEC 60332<\/div>\n <div class=\"standard-name\">Tests on electric cables under fire conditions<\/div>\n <\/div>\n <div class=\"standard-item\">\n <div class=\"standard-code\">GB\/T 12972<\/div>\n <div class=\"standard-name\">\u7164\u77ff\u7528\u7535\u7f06 Mining cables for rated voltages<\/div>\n <\/div>\n <div class=\"standard-item\">\n <div class=\"standard-code\">MT 818<\/div>\n <div class=\"standard-name\">\u7164\u77ff\u7528\u7535\u7f06 Coal mine cables<\/div>\n <\/div>\n <div class=\"standard-item\">\n <div class=\"standard-code\">EN 50525<\/div>\n <div class=\"standard-name\">Electric cables – Low voltage energy cables<\/div>\n <\/div>\n <div class=\"standard-item\">\n <div class=\"standard-code\">UL 1277<\/div>\n <div class=\"standard-name\">Electrical Power and Control Tray Cables<\/div>\n <\/div>\n <div class=\"standard-item\">\n <div class=\"standard-code\">CSA C22.2<\/div>\n <div class=\"standard-name\">Canadian Electrical Code<\/div>\n <\/div>\n <div class=\"standard-item\">\n <div class=\"standard-code\">AS\/NZS 5000<\/div>\n <div class=\"standard-name\">Electric cables – Polymeric insulated<\/div>\n <\/div>\n <\/div>\n\n <div class=\"sources\">\n <h4>\n <svg viewBox=\"0 0 24 24\" width=\"20\" height=\"20\" fill=\"currentColor\"><path d=\"M12 2C6.48 2 2 6.48 2 12s4.48 10 10 10 10-4.48 10-10S17.52 2 12 2zm1 15h-2v-2h2v2zm0-4h-2V7h2v6z\"\/><\/svg>\n \u0627\u0644\u0645\u0635\u0627\u062f\u0631 \u0627\u0644\u0631\u0633\u0645\u064a\u0629 \u0644\u0644\u0645\u0639\u0627\u064a\u064a\u0631 | Official Standards Sources\n <\/h4>\n <ul class=\"source-list\">\n <li>\n <a href=\"https:\/\/www.iec.ch\/homepage\" rel=\"nofollow noopener\" target=\"_blank\">International Electrotechnical Commission (IEC)<\/a>\n <span class=\"source-org\">Official IEC Standards Portal<\/span>\n <\/li>\n <li>\n <a href=\"https:\/\/www.ul.com\/resources\/standards\" rel=\"nofollow noopener\" target=\"_blank\">UL Standards & Engagement<\/a>\n <span class=\"source-org\">Underwriters Laboratories<\/span>\n <\/li>\n <li>\n <a href=\"https:\/\/www.cenelec.eu\/\" rel=\"nofollow noopener\" target=\"_blank\">European Committee for Electrotechnical Standardization (CENELEC)<\/a>\n <span class=\"source-org\">European Standards Body<\/span>\n <\/li>\n <\/ul>\n <\/div>\n <\/section>\n\n \n <section class=\"section\">\n <div class=\"section-header\">\n <div class=\"section-icon\">\n <svg viewBox=\"0 0 24 24\"><path d=\"M9 16.17L4.83 12l-1.42 1.41L9 19 21 7l-1.41-1.41z\"\/><\/svg>\n <\/div>\n <h2 class=\"lang-ar\">\u062f\u0644\u064a\u0644 \u0627\u0644\u0627\u062e\u062a\u064a\u0627\u0631 \u0627\u0644\u0633\u0631\u064a\u0639<\/h2>\n <\/div>\n\n <p class=\"lang-ar\">\u064a\u0648\u0636\u062d \u0627\u0644\u062c\u062f\u0648\u0644 \u0627\u0644\u062a\u0627\u0644\u064a \u0627\u0644\u0645\u0642\u0627\u0633\u0627\u062a \u0627\u0644\u0645\u0648\u0635\u0649 \u0628\u0647\u0627 \u0628\u0646\u0627\u0621\u064b \u0639\u0644\u0649 \u0646\u0648\u0639 \u0627\u0644\u0645\u0639\u062f\u0627\u062a \u0648\u0645\u062a\u0637\u0644\u0628\u0627\u062a \u0627\u0644\u062a\u064a\u0627\u0631:<\/p>\n\n <div class=\"explain-zh\">\n <span class=\"lang-label zh\">\u7e41\u9ad4\u4e2d\u6587\u8aaa\u660e<\/span>\n \u4e0b\u8868\u6839\u64da\u8a2d\u5099\u985e\u578b\u548c\u96fb\u6d41\u8981\u6c42\u986f\u793a\u63a8\u85a6\u7684\u5c0e\u9ad4\u5c3a\u5bf8\u3002\u9078\u64c7\u6642\u61c9\u8003\u616e\u5b89\u5168\u4fc2\u65781.25-1.5\uff0c\u4e26\u6839\u64da\u5be6\u969b\u5b89\u88dd\u74b0\u5883\uff08\u6eab\u5ea6\u3001\u6577\u8a2d\u65b9\u5f0f\u3001\u4e26\u884c\u96fb\u7e9c\u6578\u91cf\uff09\u9032\u884c\u4fee\u6b63\u3002\n <\/div>\n\n <div class=\"explain-en\">\n <span class=\"lang-label en\">English Explanation<\/span>\n The following table shows recommended conductor sizes based on equipment type and current requirements. Selection should consider a safety factor of 1.25-1.5, and corrections should be made based on actual installation environment (temperature, laying method, number of parallel cables).\n <\/div>\n\n <div class=\"table-container\">\n <table>\n <thead>\n <tr>\n <th>\u0646\u0648\u0639 \u0627\u0644\u0645\u0639\u062f\u0627\u062a<br><span style=\"font-weight:400;font-size:0.8em\">Equipment Type<\/span><\/th>\n <th>\u0646\u0637\u0627\u0642 \u0627\u0644\u0637\u0627\u0642\u0629<br><span style=\"font-weight:400;font-size:0.8em\">Power Range<\/span><\/th>\n <th>\u0627\u0644\u0645\u0642\u0627\u0633 \u0627\u0644\u0645\u0648\u0635\u0649<br><span style=\"font-weight:400;font-size:0.8em\">Recommended Size<\/span><\/th>\n <th>\u0646\u0648\u0639 \u0627\u0644\u0643\u0627\u0628\u0644<br><span style=\"font-weight:400;font-size:0.8em\">Cable Type<\/span><\/th>\n <\/tr>\n <\/thead>\n <tbody>\n <tr>\n <td>TBM Cutterhead Drive | \u0631\u0623\u0633 \u0627\u0644\u0642\u0637\u0639<\/td>\n <td>500-2000 kW<\/td>\n <td>3\u00d7120+1\u00d770 mm\u00b2<\/td>\n <td>NSHTOEU 0.6\/1kV<\/td>\n <\/tr>\n <tr>\n <td>Conveyor System | \u0646\u0638\u0627\u0645 \u0627\u0644\u0646\u0642\u0644<\/td>\n <td>75-250 kW<\/td>\n <td>3\u00d750+1\u00d725 mm\u00b2<\/td>\n <td>NSSH\u00d6U 0.6\/1kV<\/td>\n <\/tr>\n <tr>\n <td>Ventilation Fan | \u0645\u0631\u0648\u062d\u0629 \u0627\u0644\u062a\u0647\u0648\u064a\u0629<\/td>\n <td>45-132 kW<\/td>\n <td>3\u00d735+1\u00d716 mm\u00b2<\/td>\n <td>H07RN-F<\/td>\n <\/tr>\n <tr>\n <td>Pump Station | \u0645\u062d\u0637\u0629 \u0627\u0644\u0636\u062e<\/td>\n <td>30-90 kW<\/td>\n <td>3\u00d725+1\u00d716 mm\u00b2<\/td>\n <td>N2XY 0.6\/1kV<\/td>\n <\/tr>\n <tr>\n <td>Lighting System | \u0646\u0638\u0627\u0645 \u0627\u0644\u0625\u0636\u0627\u0621\u0629<\/td>\n <td>5-20 kW<\/td>\n <td>3\u00d76+1\u00d74 mm\u00b2<\/td>\n <td>NYY 0.6\/1kV<\/td>\n <\/tr>\n <tr>\n <td>Cable Reel (Moving) | \u0628\u0643\u0631\u0629 \u0645\u062a\u062d\u0631\u0643\u0629<\/td>\n <td>100-500 kW<\/td>\n <td>3\u00d795+1\u00d750 mm\u00b2<\/td>\n <td>NSHT\u00d6U-J 0.6\/1kV<\/td>\n <\/tr>\n <\/tbody>\n <\/table>\n <\/div>\n\n <div class=\"table-note lang-en\" style=\"direction:ltr\">\n <strong>Important:<\/strong> Final selection must be verified by qualified electrical engineers based on specific project requirements, local regulations, and actual installation conditions. Contact Anhui Feichun technical team for detailed specifications and customized solutions.\n <\/div>\n <\/section>\n\n \n <section class=\"section\">\n <div class=\"section-header\">\n <div class=\"section-icon\">\n <svg viewBox=\"0 0 24 24\"><path d=\"M12 7V3H2v18h20V7H12zM6 19H4v-2h2v2zm0-4H4v-2h2v2zm0-4H4V9h2v2zm0-4H4V5h2v2zm4 12H8v-2h2v2zm0-4H8v-2h2v2zm0-4H8V9h2v2zm0-4H8V5h2v2zm10 12h-8v-2h2v-2h-2v-2h2v-2h-2V9h8v10zm-2-8h-2v2h2v-2zm0 4h-2v2h2v-2z\"\/><\/svg>\n <\/div>\n <h2 class=\"lang-ar\">\u0646\u0628\u0630\u0629 \u0639\u0646 \u0634\u0631\u0643\u0629 \u0623\u0646\u0647\u0648\u064a \u0641\u064a\u062a\u0634\u0648\u0646<\/h2>\n <\/div>\n\n <p class=\"lang-ar\">\u0634\u0631\u0643\u0629 \u0623\u0646\u0647\u0648\u064a \u0641\u064a\u062a\u0634\u0648\u0646 \u0644\u0644\u0643\u0627\u0628\u0644\u0627\u062a \u0627\u0644\u062e\u0627\u0635\u0629 \u0627\u0644\u0645\u062d\u062f\u0648\u062f\u0629 \u0647\u064a \u0634\u0631\u0643\u0629 \u0635\u064a\u0646\u064a\u0629 \u0631\u0627\u0626\u062f\u0629 \u0645\u062a\u062e\u0635\u0635\u0629 \u0641\u064a \u062a\u0635\u0646\u064a\u0639 \u0627\u0644\u0643\u0627\u0628\u0644\u0627\u062a \u0627\u0644\u0635\u0646\u0627\u0639\u064a\u0629 \u0639\u0627\u0644\u064a\u0629 \u0627\u0644\u0623\u062f\u0627\u0621 \u0644\u062a\u0637\u0628\u064a\u0642\u0627\u062a \u0627\u0644\u062a\u0639\u062f\u064a\u0646 \u0648\u062d\u0641\u0631 \u0627\u0644\u0623\u0646\u0641\u0627\u0642 \u0648\u0645\u0639\u062f\u0627\u062a \u0627\u0644\u0628\u0646\u0627\u0621.<\/p>\n\n <div class=\"explain-zh\">\n <span class=\"lang-label zh\">\u7e41\u9ad4\u4e2d\u6587\u8aaa\u660e<\/span>\n \u5b89\u5fbd\u98db\u7d14\u7279\u7a2e\u96fb\u7e9c\u6709\u9650\u516c\u53f8\u662f\u4e00\u5bb6\u9818\u5148\u7684\u4e2d\u570b\u88fd\u9020\u5546\uff0c\u5c08\u696d\u751f\u7522\u9ad8\u6027\u80fd\u5de5\u696d\u96fb\u7e9c\uff0c\u7528\u65bc\u63a1\u7926\u3001\u96a7\u9053\u6398\u9032\u548c\u5efa\u7bc9\u8a2d\u5099\u61c9\u7528\u3002\u516c\u53f8\u7522\u54c1\u7b26\u5408IEC\u3001GB\u3001DIN\u7b49\u591a\u9805\u570b\u969b\u6a19\u6e96\uff0c\u4e26\u901a\u904eISO 9001\u8cea\u91cf\u7ba1\u7406\u9ad4\u7cfb\u8a8d\u8b49\u3002\n <\/div>\n\n <div class=\"explain-en\">\n <span class=\"lang-label en\">English Explanation<\/span>\n Anhui Feichun Special Cable Co., Ltd. is a leading Chinese manufacturer specializing in high-performance industrial cables for mining, tunnelling, and construction equipment applications. The company’s products comply with multiple international standards including IEC, GB, and DIN, and are certified under ISO 9001 quality management system.\n <\/div>\n\n <div class=\"param-grid\">\n <div class=\"param-card\">\n <div class=\"param-label lang-ar\">\u0633\u0646\u0648\u0627\u062a \u0627\u0644\u062e\u0628\u0631\u0629<\/div>\n <div class=\"param-value\">15+<\/div>\n <div class=\"param-unit\">Years Experience<\/div>\n <\/div>\n <div class=\"param-card\">\n <div class=\"param-label lang-ar\">\u0623\u0646\u0648\u0627\u0639 \u0627\u0644\u0645\u0646\u062a\u062c\u0627\u062a<\/div>\n <div class=\"param-value\">200+<\/div>\n <div class=\"param-unit\">Product Types<\/div>\n <\/div>\n <div class=\"param-card\">\n <div class=\"param-label lang-ar\">\u0627\u0644\u062f\u0648\u0644 \u0627\u0644\u0645\u0635\u062f\u0631 \u0625\u0644\u064a\u0647\u0627<\/div>\n <div class=\"param-value\">50+<\/div>\n <div class=\"param-unit\">Export Countries<\/div>\n <\/div>\n <div class=\"param-card\">\n <div class=\"param-label lang-ar\">\u0627\u0644\u0634\u0647\u0627\u062f\u0627\u062a<\/div>\n <div class=\"param-value\">ISO\/CE\/CCC<\/div>\n <div class=\"param-unit\">Certifications<\/div>\n <\/div>\n <\/div>\n <\/section>\n\n \n <section class=\"contact-section\">\n <h3 class=\"lang-ar\">\u062a\u0648\u0627\u0635\u0644 \u0645\u0639 \u0641\u0631\u064a\u0642\u0646\u0627 \u0627\u0644\u062a\u0642\u0646\u064a<\/h3>\n <p class=\"lang-ar\" style=\"color: var(--text-secondary); margin-bottom: 1.5rem;\">\n \u0644\u0644\u062d\u0635\u0648\u0644 \u0639\u0644\u0649 \u0627\u0633\u062a\u0634\u0627\u0631\u0629 \u0645\u062a\u062e\u0635\u0635\u0629 \u062d\u0648\u0644 \u0627\u062e\u062a\u064a\u0627\u0631 \u0627\u0644\u0643\u0627\u0628\u0644\u0627\u062a \u0627\u0644\u0645\u0646\u0627\u0633\u0628\u0629 \u0644\u0645\u0634\u0631\u0648\u0639\u0643\n <\/p>\n\n <div class=\"explain-zh\" style=\"max-width: 600px; margin: 0 auto 1rem;\">\n <span class=\"lang-label zh\">\u7e41\u9ad4\u4e2d\u6587<\/span>\n \u806f\u7e6b\u6211\u5011\u7684\u6280\u8853\u5718\u968a\uff0c\u7372\u53d6\u5c08\u696d\u7684\u96fb\u7e9c\u9078\u578b\u8aee\u8a62\u670d\u52d9\n <\/div>\n\n <div class=\"explain-en\" style=\"max-width: 600px; margin: 0 auto 1.5rem;\">\n <span class=\"lang-label en\">English<\/span>\n Contact our technical team for professional cable selection consultation\n <\/div>\n\n <a href=\"https:\/\/wa.me\/8613855123218\" class=\"whatsapp-btn\" rel=\"nofollow noopener\" target=\"_blank\">\n <svg viewBox=\"0 0 24 24\"><path d=\"M17.472 14.382c-.297-.149-1.758-.867-2.03-.967-.273-.099-.471-.148-.67.15-.197.297-.767.966-.94 1.164-.173.199-.347.223-.644.075-.297-.15-1.255-.463-2.39-1.475-.883-.788-1.48-1.761-1.653-2.059-.173-.297-.018-.458.13-.606.134-.133.298-.347.446-.52.149-.174.198-.298.298-.497.099-.198.05-.371-.025-.52-.075-.149-.669-1.612-.916-2.207-.242-.579-.487-.5-.669-.51-.173-.008-.371-.01-.57-.01-.198 0-.52.074-.792.372-.272.297-1.04 1.016-1.04 2.479 0 1.462 1.065 2.875 1.213 3.074.149.198 2.096 3.2 5.077 4.487.709.306 1.262.489 1.694.625.712.227 1.36.195 1.871.118.571-.085 1.758-.719 2.006-1.413.248-.694.248-1.289.173-1.413-.074-.124-.272-.198-.57-.347m-5.421 7.403h-.004a9.87 9.87 0 01-5.031-1.378l-.361-.214-3.741.982.998-3.648-.235-.374a9.86 9.86 0 01-1.51-5.26c.001-5.45 4.436-9.884 9.888-9.884 2.64 0 5.122 1.03 6.988 2.898a9.825 9.825 0 012.893 6.994c-.003 5.45-4.437 9.884-9.885 9.884m8.413-18.297A11.815 11.815 0 0012.05 0C5.495 0 .16 5.335.157 11.892c0 2.096.547 4.142 1.588 5.945L.057 24l6.305-1.654a11.882 11.882 0 005.683 1.448h.005c6.554 0 11.89-5.335 11.893-11.893a11.821 11.821 0 00-3.48-8.413z\"\/><\/svg>\n <span style=\"direction:ltr\">WhatsApp: +86 138 5512 3218<\/span>\n <\/a>\n\n <div class=\"contact-grid\">\n <div class=\"contact-card\">\n <svg viewBox=\"0 0 24 24\"><path d=\"M20 4H4c-1.1 0-1.99.9-1.99 2L2 18c0 1.1.9 2 2 2h16c1.1 0 2-.9 2-2V6c0-1.1-.9-2-2-2zm0 4l-8 5-8-5V6l8 5 8-5v2z\"\/><\/svg>\n <h4>\u0627\u0644\u062f\u0639\u0645 \u0627\u0644\u0641\u0646\u064a | Technical Support<\/h4>\n <a href=\"mailto:tech@feichuncables.com\" rel=\"nofollow\">tech@feichuncables.com<\/a>\n <\/div>\n <div class=\"contact-card\">\n <svg viewBox=\"0 0 24 24\"><path d=\"M20 4H4c-1.1 0-1.99.9-1.99 2L2 18c0 1.1.9 2 2 2h16c1.1 0 2-.9 2-2V6c0-1.1-.9-2-2-2zm0 4l-8 5-8-5V6l8 5 8-5v2z\"\/><\/svg>\n <h4>Zihao Yang | \u064a\u0627\u0646\u063a \u0632\u064a\u0647\u0627\u0648<\/h4>\n <a href=\"mailto:zihao.yang@feichuncables.com\" rel=\"nofollow\">zihao.yang@feichuncables.com<\/a>\n <\/div>\n <div class=\"contact-card\">\n <svg viewBox=\"0 0 24 24\"><path d=\"M20 4H4c-1.1 0-1.99.9-1.99 2L2 18c0 1.1.9 2 2 2h16c1.1 0 2-.9 2-2V6c0-1.1-.9-2-2-2zm0 4l-8 5-8-5V6l8 5 8-5v2z\"\/><\/svg>\n <h4>Ziyu Huang | \u0647\u0648\u0627\u0646\u063a \u0632\u064a\u0648\u064a<\/h4>\n <a href=\"mailto:ziyu.huang@feichuncables.com\" rel=\"nofollow\">ziyu.huang@feichuncables.com<\/a>\n <\/div>\n <\/div>\n <\/section>\n <\/main>\n\n \n <footer>\n <p style=\"margin-bottom: 0.5rem;\">\n \u00a9 2024 Anhui Feichun Special Cable Co., Ltd. | \u5b89\u5fbd\u98db\u7d14\u7279\u7a2e\u96fb\u7e9c\u6709\u9650\u516c\u53f8 | \u0634\u0631\u0643\u0629 \u0623\u0646\u0647\u0648\u064a \u0641\u064a\u062a\u0634\u0648\u0646 \u0644\u0644\u0643\u0627\u0628\u0644\u0627\u062a \u0627\u0644\u062e\u0627\u0635\u0629 \u0627\u0644\u0645\u062d\u062f\u0648\u062f\u0629\n <\/p>\n <p style=\"font-size: 0.8rem; color: var(--text-muted);\">\n Anhui Province, China | \n <a href=\"https:\/\/wa.me\/8613855123218\" rel=\"nofollow noopener\" target=\"_blank\">WhatsApp<\/a> | \n <a href=\"mailto:tech@feichuncables.com\" rel=\"nofollow\">Email<\/a>\n <\/p>\n <p style=\"font-size: 0.75rem; margin-top: 1rem; color: var(--text-muted);\">\n Technical information provided for reference only. Please consult qualified engineers for specific applications.\n <\/p>\n <\/footer>\n<\/body>\n<\/html>\n","protected":false},"excerpt":{"rendered":"Selecting the correct conductor size for cables used in tunnel boring equipment and cable reels is critical for ensuring safety and operational efficiency. These cables are subjected to extreme conditions including high currents, mechanical stress, and elevated temperatures. According to International Electrotechnical Commission (IEC) standards, conductor selection must consider ampacity, voltage drop, short-circuit capacity, and environmental 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How do you select conductor size for high-current tunnelling equipment and cable reels?<\/p>\n\n\n\n

\u5982\u4f55\u70ba\u9ad8\u96fb\u6d41\u96a7\u9053\u8a2d\u5099\u548c\u96fb\u7e9c\u6372\u76e4\u9078\u64c7\u5c0e\u9ad4\u5c3a\u5bf8\uff1f<\/p>\n\n\n\n