UNE 22511 \u2014 Flexible Unarmoured Mining Drag Cable 1.8\/3 kV | FeiChun Special Cables<\/title>\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=Playfair+Display:ital,wght@0,400;0,600;0,700;1,400&family=Inter:wght@300;400;500;600;700&family=IBM+Plex+Mono:wght@300;400;500;600;700&display=swap\" rel=\"stylesheet\">\n<style>\n\n\/* ================================================================\n FEICHUN SPECIAL CABLES \u2014 FORMAL TECHNICAL SPECIFICATION\n UNE 22511 \u2014 Flexible Unarmoured Mining Drag Cable, 1.8\/3 kV\n Document: FC-TDS-UNE22511-2026-EN01\n Rev 1.0 \u2014 May 2026 \u2014 English\n================================================================ *\/\n\n:root {\n --navy: #15284A;\n --navy-deep: #0d1c34;\n --navy-mid: #1e3a6e;\n --copper: #B86A3C;\n --copper-dk: #8a4f2c;\n --gold: #C4973A;\n --gold-lt: #ddb96a;\n --gold-pale: #F5EDD8;\n --green: #2F6E43;\n --green-pale:#EAF3ED;\n --red: #9B2226;\n --red-pale: #F8ECED;\n --ink: #1C2535;\n --slate: #3D4F65;\n --grey: #6B7A8D;\n --grey-lt: #C8D0DA;\n --grey-bg: #F3F5F7;\n --paper: #FFFFFF;\n --warm: #FAFAF8;\n --rule: #D4D9E1;\n --amber: #92400E;\n --amber-pale:#FEF3C7;\n}\n\n@page { size: A4 portrait; margin: 0; }\n*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }\n\nhtml, body {\n background: #CBD3DC;\n font-family: 'Inter', 'Segoe UI', sans-serif;\n font-size: 9pt;\n color: var(--ink);\n line-height: 1.55;\n -webkit-print-color-adjust: exact;\n print-color-adjust: exact;\n}\n\n\/* \u2500\u2500 A4 PAGE SHELL \u2500\u2500 *\/\n.page {\n width: 210mm;\n min-height: 297mm;\n margin: 8mm auto;\n background: var(--paper);\n position: relative;\n overflow: hidden;\n box-shadow: 0 4px 28px rgba(0,0,0,0.20);\n page-break-after: always;\n}\n.page:last-child { page-break-after: auto; }\n\n@media print {\n html, body { background: none; }\n .page { margin: 0; box-shadow: none; }\n}\n\n\/* \u2500\u2500 WATERMARK \u2500\u2500 *\/\n.page::before {\n content: 'FEICHUN CABLES';\n position: absolute;\n top: 50%; left: 50%;\n transform: translate(-50%, -50%) rotate(-32deg);\n font-family: 'Playfair Display', serif;\n font-size: 62pt;\n font-weight: 700;\n letter-spacing: 0.06em;\n color: rgba(21,40,74,0.030);\n white-space: nowrap;\n pointer-events: none;\n z-index: 0;\n}\n\n.page-inner { position: relative; z-index: 1; width: 100%; height: 100%; }\n\n\/* \u2500\u2500 GOLD STRIPE \u2500\u2500 *\/\n.gold-stripe {\n height: 3.5px;\n background: linear-gradient(90deg, var(--gold) 0%, var(--copper) 60%, transparent 100%);\n}\n\n\/* \u2500\u2500 PAGE 1 HEADER \u2500\u2500 *\/\n.doc-header {\n background: var(--navy-deep);\n padding: 8mm 12mm 0 12mm;\n}\n\n.header-top-row {\n display: flex;\n justify-content: space-between;\n align-items: flex-start;\n padding-bottom: 5mm;\n border-bottom: 1px solid rgba(255,255,255,0.09);\n}\n\n.brand-name {\n font-family: 'Playfair Display', serif;\n font-size: 13pt;\n font-weight: 700;\n color: #fff;\n letter-spacing: 0.02em;\n line-height: 1.2;\n margin-bottom: 2px;\n}\n\n.brand-sub {\n font-family: 'IBM Plex Mono', monospace;\n font-size: 7pt;\n color: rgba(255,255,255,0.36);\n letter-spacing: 0.06em;\n}\n\n.doc-meta { text-align: right; }\n\n.doc-id {\n font-family: 'IBM Plex Mono', monospace;\n font-size: 7.5pt;\n font-weight: 600;\n color: var(--gold);\n letter-spacing: 0.05em;\n line-height: 1.8;\n}\n\n.doc-lang {\n font-family: 'IBM Plex Mono', monospace;\n font-size: 6.8pt;\n color: rgba(255,255,255,0.30);\n letter-spacing: 0.04em;\n}\n\n\/* \u2500\u2500 PRODUCT IDENTITY \u2500\u2500 *\/\n.product-block {\n display: flex;\n align-items: flex-end;\n justify-content: space-between;\n padding: 7mm 0 6mm 0;\n}\n\n.product-cat {\n font-family: 'IBM Plex Mono', monospace;\n font-size: 7pt;\n font-weight: 500;\n letter-spacing: 0.16em;\n text-transform: uppercase;\n color: var(--copper);\n margin-bottom: 4px;\n display: flex;\n align-items: center;\n gap: 6px;\n}\n\n.product-cat::before {\n content: '';\n display: block;\n width: 18px; height: 1.5px;\n background: var(--copper);\n}\n\n.product-name {\n font-family: 'Playfair Display', serif;\n font-size: 30pt;\n font-weight: 700;\n color: #fff;\n letter-spacing: -0.3px;\n line-height: 1.05;\n margin-bottom: 4px;\n}\n\n.product-full-title {\n font-family: 'Inter', sans-serif;\n font-size: 8pt;\n font-weight: 300;\n font-style: italic;\n color: rgba(255,255,255,0.48);\n max-width: 130mm;\n line-height: 1.5;\n}\n\n\/* \u2500\u2500 RATING BAND \u2500\u2500 *\/\n.rating-band {\n display: flex;\n gap: 0;\n border-top: 1px solid rgba(255,255,255,0.07);\n}\n\n.rating-chip {\n flex: 1;\n padding: 4px 0;\n text-align: center;\n border-right: 1px solid rgba(255,255,255,0.06);\n}\n.rating-chip:last-child { border-right: none; }\n\n.r-val {\n font-family: 'IBM Plex Mono', monospace;\n font-size: 8.5pt;\n font-weight: 600;\n color: #fff;\n line-height: 1;\n margin-bottom: 2px;\n}\n\n.r-lbl {\n font-family: 'IBM Plex Mono', monospace;\n font-size: 5.8pt;\n letter-spacing: 0.1em;\n text-transform: uppercase;\n color: rgba(255,255,255,0.30);\n}\n\n\/* \u2500\u2500 STAT BAR \u2500\u2500 *\/\n.stat-bar {\n display: grid;\n grid-template-columns: repeat(4, 1fr);\n background: var(--navy);\n border-top: 2px solid var(--gold);\n}\n\n.stat-cell {\n padding: 5mm 0 4.5mm 5.5mm;\n border-right: 1px solid rgba(255,255,255,0.06);\n}\n.stat-cell:last-child { border-right: none; }\n\n.s-v {\n font-family: 'IBM Plex Mono', monospace;\n font-size: 12.5pt;\n font-weight: 600;\n color: #fff;\n line-height: 1;\n margin-bottom: 3px;\n}\n\n.s-l {\n font-size: 6.2pt;\n font-weight: 500;\n letter-spacing: 0.1em;\n text-transform: uppercase;\n color: rgba(255,255,255,0.33);\n}\n\n\/* \u2500\u2500 CONTINUATION HEADER \u2500\u2500 *\/\n.page-cont-header {\n background: var(--navy-deep);\n display: flex;\n align-items: center;\n justify-content: space-between;\n padding: 3.5mm 12mm;\n border-bottom: 2px solid var(--gold);\n}\n\n.cont-brand {\n font-family: 'IBM Plex Mono', monospace;\n font-size: 7pt;\n font-weight: 600;\n color: rgba(255,255,255,0.45);\n letter-spacing: 0.06em;\n}\n\n.cont-product {\n font-family: 'Playfair Display', serif;\n font-size: 9.5pt;\n font-weight: 700;\n color: #fff;\n}\n\n.cont-doc {\n font-family: 'IBM Plex Mono', monospace;\n font-size: 6.5pt;\n color: var(--gold);\n letter-spacing: 0.04em;\n text-align: right;\n}\n\n\/* \u2500\u2500 BODY \u2500\u2500 *\/\n.body-pad {\n padding: 6mm 12mm;\n}\n\n\/* \u2500\u2500 SECTION HEADER \u2500\u2500 *\/\n.sec-head {\n display: flex;\n align-items: center;\n gap: 7px;\n margin-bottom: 4mm;\n padding-bottom: 2.5mm;\n border-bottom: 1px solid var(--rule);\n position: relative;\n}\n\n.sec-head::after {\n content: '';\n position: absolute;\n bottom: -1px; left: 0;\n width: 38px; height: 1.5px;\n background: var(--copper);\n}\n\n.sec-num {\n font-family: 'IBM Plex Mono', monospace;\n font-size: 7.2pt;\n font-weight: 700;\n color: var(--copper);\n letter-spacing: 0.04em;\n flex-shrink: 0;\n min-width: 20px;\n}\n\n.sec-title {\n font-family: 'Playfair Display', serif;\n font-size: 10pt;\n font-weight: 600;\n color: var(--navy);\n}\n\n\/* \u2500\u2500 BODY TEXT \u2500\u2500 *\/\n.body-text {\n font-family: 'Inter', sans-serif;\n font-size: 8.5pt;\n color: var(--slate);\n line-height: 1.7;\n margin-bottom: 3.5mm;\n text-align: justify;\n}\n\n.body-text strong { color: var(--navy); font-weight: 600; }\n.body-text em { font-style: italic; color: var(--grey); }\n\n\/* \u2500\u2500 TABLES \u2500\u2500 *\/\n.spec-tbl {\n width: 100%;\n border-collapse: collapse;\n font-size: 7.6pt;\n margin-bottom: 4mm;\n}\n\n.spec-tbl thead tr { background: var(--navy); }\n.spec-tbl thead th {\n padding: 2.5mm 3mm;\n font-family: 'IBM Plex Mono', monospace;\n font-size: 6.5pt;\n font-weight: 600;\n letter-spacing: 0.08em;\n text-transform: uppercase;\n color: rgba(255,255,255,0.85);\n text-align: left;\n vertical-align: bottom;\n line-height: 1.3;\n}\n\n.spec-tbl tbody tr:nth-child(even) { background: var(--grey-bg); }\n.spec-tbl td {\n padding: 2mm 3mm;\n border-bottom: 1px solid var(--rule);\n color: var(--slate);\n vertical-align: top;\n line-height: 1.4;\n}\n\n.spec-tbl td:first-child {\n font-weight: 600;\n color: var(--navy);\n}\n\n.spec-tbl td.mono {\n font-family: 'IBM Plex Mono', monospace;\n font-size: 7.5pt;\n}\n\n.spec-tbl td.hi-green {\n font-family: 'IBM Plex Mono', monospace;\n font-weight: 700;\n color: var(--green);\n font-size: 7.5pt;\n}\n\n.spec-tbl td.hi-red {\n font-family: 'IBM Plex Mono', monospace;\n font-weight: 600;\n color: var(--red);\n font-size: 7.5pt;\n}\n\n.spec-tbl td.hi-copper {\n font-family: 'IBM Plex Mono', monospace;\n font-weight: 700;\n color: var(--copper-dk);\n font-size: 7.5pt;\n}\n\n.spec-tbl td.hi-navy {\n font-family: 'IBM Plex Mono', monospace;\n font-weight: 700;\n color: var(--navy);\n font-size: 7.5pt;\n}\n\n.spec-tbl.green-head thead tr { background: var(--green); }\n.spec-tbl.copper-head thead tr { background: var(--copper-dk); }\n.spec-tbl.red-head thead tr { background: var(--red); }\n\n\/* COMPARISON TABLE \u2014 22511 vs 22512 *\/\n.cmp-tbl { width: 100%; border-collapse: collapse; font-size: 7.3pt; margin-bottom: 4mm; }\n.cmp-tbl thead tr { background: var(--navy); }\n.cmp-tbl thead th {\n padding: 2.5mm 2.5mm;\n font-family: 'IBM Plex Mono', monospace;\n font-size: 6.2pt;\n font-weight: 600;\n letter-spacing: 0.07em;\n text-transform: uppercase;\n color: rgba(255,255,255,0.85);\n text-align: left;\n vertical-align: bottom;\n line-height: 1.35;\n}\n.cmp-tbl thead th.col-22511 { background: rgba(47,110,67,0.25); border-left: 2px solid var(--green); }\n.cmp-tbl thead th.col-22512 { background: rgba(155,34,38,0.2); border-left: 2px solid var(--red); }\n.cmp-tbl thead th.col-conseq { background: rgba(196,151,58,0.15); border-left: 2px solid var(--gold); }\n\n.cmp-tbl tbody tr:nth-child(even) { background: var(--grey-bg); }\n.cmp-tbl td {\n padding: 1.8mm 2.5mm;\n border-bottom: 1px solid var(--rule);\n color: var(--slate);\n vertical-align: top;\n line-height: 1.4;\n font-size: 7.2pt;\n}\n.cmp-tbl td:first-child {\n font-family: 'IBM Plex Mono', monospace;\n font-size: 6.8pt;\n font-weight: 600;\n color: var(--navy);\n width: 32mm;\n white-space: normal;\n}\n.cmp-tbl td.col-22511-d { border-left: 2px solid rgba(47,110,67,0.3); background: rgba(47,110,67,0.03); color: #1e4d2c; }\n.cmp-tbl td.col-22512-d { border-left: 2px solid rgba(155,34,38,0.25); background: rgba(155,34,38,0.03); }\n.cmp-tbl td.col-conseq-d { border-left: 2px solid rgba(196,151,58,0.3); background: rgba(196,151,58,0.04); font-size: 6.9pt; color: var(--grey); }\n\n\/* WIRE STRESS TABLE *\/\n.stress-tbl { width: 100%; border-collapse: collapse; font-size: 7.5pt; margin-bottom: 4mm; }\n.stress-tbl thead tr { background: var(--navy-deep); }\n.stress-tbl thead th {\n padding: 2.5mm 3mm;\n font-family: 'IBM Plex Mono', monospace;\n font-size: 6.5pt;\n font-weight: 600;\n letter-spacing: 0.07em;\n text-transform: uppercase;\n color: rgba(255,255,255,0.8);\n text-align: left;\n}\n.stress-tbl tbody tr:nth-child(even) { background: var(--grey-bg); }\n.stress-tbl td { padding: 2mm 3mm; border-bottom: 1px solid var(--rule); color: var(--slate); }\n.stress-tbl td:first-child { color: var(--navy); font-weight: 600; }\n.stress-tbl td.mono { font-family: 'IBM Plex Mono', monospace; font-size: 7.5pt; }\n.stress-tbl .row-fail td { background: #fef2f2; }\n.stress-tbl .row-warn td { background: var(--amber-pale); }\n.stress-tbl .row-ok td { background: var(--green-pale); }\n.stress-tbl .row-best td { background: #e0f2fe; }\n\n\/* \u2500\u2500 CALLOUT BOXES \u2500\u2500 *\/\n.callout {\n border-radius: 3px;\n padding: 3mm 4mm;\n margin-bottom: 3.5mm;\n display: flex;\n gap: 3mm;\n align-items: flex-start;\n}\n\n.callout-icon { font-size: 11pt; flex-shrink: 0; margin-top: 1px; }\n\n.callout-head {\n font-family: 'Inter', sans-serif;\n font-size: 6.8pt;\n font-weight: 700;\n text-transform: uppercase;\n letter-spacing: 0.07em;\n margin-bottom: 2px;\n}\n\n.callout-body {\n font-family: 'Inter', sans-serif;\n font-size: 7.8pt;\n line-height: 1.6;\n}\n\n.callout.navy-c { background: #e8eef7; border-left: 2.5px solid var(--navy); }\n.callout.navy-c .callout-head { color: var(--navy); }\n.callout.navy-c .callout-body { color: var(--navy-mid); }\n\n.callout.copper-c { background: #f7ede3; border-left: 2.5px solid var(--copper); }\n.callout.copper-c .callout-head { color: var(--copper-dk); }\n.callout.copper-c .callout-body { color: #6b3c21; }\n\n.callout.green-c { background: var(--green-pale); border-left: 2.5px solid var(--green); }\n.callout.green-c .callout-head { color: var(--green); }\n.callout.green-c .callout-body { color: #1e4d2c; }\n\n.callout.red-c { background: var(--red-pale); border-left: 2.5px solid var(--red); }\n.callout.red-c .callout-head { color: var(--red); }\n.callout.red-c .callout-body { color: #5c1618; }\n\n.callout.gold-c { background: var(--gold-pale); border-left: 2.5px solid var(--gold); }\n.callout.gold-c .callout-head { color: var(--amber); }\n.callout.gold-c .callout-body { color: #6b5215; }\n\n.callout.amber-c { background: var(--amber-pale); border-left: 2.5px solid #D97706; }\n.callout.amber-c .callout-head { color: var(--amber); }\n.callout.amber-c .callout-body { color: #78350F; }\n\n\/* \u2500\u2500 FORMULA BLOCK \u2500\u2500 *\/\n.formula-block {\n background: var(--navy-deep);\n border-radius: 3px;\n padding: 3.5mm 5mm;\n margin-bottom: 4mm;\n}\n\n.formula-label {\n font-family: 'IBM Plex Mono', monospace;\n font-size: 6.3pt;\n font-weight: 600;\n letter-spacing: 0.1em;\n text-transform: uppercase;\n color: var(--copper);\n margin-bottom: 3mm;\n}\n\n.formula-text {\n font-family: 'IBM Plex Mono', monospace;\n font-size: 7.8pt;\n color: #9ec8e8;\n line-height: 2;\n}\n\n.formula-note {\n font-family: 'Inter', sans-serif;\n font-size: 6.8pt;\n color: rgba(255,255,255,0.30);\n margin-top: 3mm;\n line-height: 1.5;\n}\n\n\/* \u2500\u2500 LAYER LIST \u2500\u2500 *\/\n.layer-list { list-style: none; counter-reset: lyr; margin-bottom: 4mm; }\n.layer-list li {\n counter-increment: lyr;\n display: flex;\n gap: 3mm;\n padding: 2.5mm 0;\n border-bottom: 1px solid var(--grey-bg);\n align-items: flex-start;\n}\n.layer-list li::before {\n content: counter(lyr, decimal-leading-zero);\n font-family: 'IBM Plex Mono', monospace;\n font-size: 6.5pt;\n font-weight: 700;\n color: #fff;\n background: var(--navy);\n border-radius: 50%;\n width: 15px; height: 15px;\n flex-shrink: 0;\n display: flex;\n align-items: center;\n justify-content: center;\n margin-top: 1px;\n}\n\n.layer-name {\n font-family: 'Inter', sans-serif;\n font-size: 7.8pt;\n font-weight: 700;\n color: var(--navy);\n margin-bottom: 1px;\n}\n\n.layer-desc {\n font-family: 'Inter', sans-serif;\n font-size: 7.3pt;\n color: var(--grey);\n line-height: 1.55;\n}\n\n\/* \u2500\u2500 FEATURE GRID \u2500\u2500 *\/\n.feature-grid {\n display: grid;\n grid-template-columns: 1fr 1fr;\n gap: 3mm;\n margin-bottom: 4mm;\n}\n\n.feature-card {\n border: 1px solid var(--rule);\n border-radius: 3px;\n padding: 3mm 3.5mm;\n background: var(--warm);\n position: relative;\n overflow: hidden;\n}\n\n.feature-card::before {\n content: '';\n position: absolute;\n top: 0; left: 0;\n width: 2.5px; height: 100%;\n}\n\n.feature-card.navy::before { background: var(--navy); }\n.feature-card.copper::before { background: var(--copper); }\n.feature-card.green::before { background: var(--green); }\n.feature-card.gold::before { background: var(--gold); }\n.feature-card.red::before { background: var(--red); }\n\n.fc-icon { font-size: 13pt; margin-bottom: 2mm; display: block; }\n\n.fc-name {\n font-family: 'Inter', sans-serif;\n font-size: 7.5pt;\n font-weight: 700;\n color: var(--navy);\n margin-bottom: 2px;\n line-height: 1.3;\n}\n\n.fc-desc {\n font-family: 'Inter', sans-serif;\n font-size: 7pt;\n color: var(--grey);\n line-height: 1.5;\n}\n\n\/* \u2500\u2500 TWO COLUMN \u2500\u2500 *\/\n.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 5mm; margin-bottom: 4mm; }\n.three-col { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 4mm; margin-bottom: 4mm; }\n\n\/* \u2500\u2500 PROP BADGE \u2500\u2500 *\/\n.prop-badge {\n display: inline-flex;\n align-items: center;\n gap: 4px;\n background: linear-gradient(90deg, var(--gold), var(--gold-lt));\n color: var(--navy-deep);\n font-family: 'IBM Plex Mono', monospace;\n font-size: 6.3pt;\n font-weight: 700;\n letter-spacing: 0.1em;\n padding: 2px 7px;\n border-radius: 2px;\n margin-bottom: 2.5mm;\n}\n\n\/* \u2500\u2500 WARNING BOX \u2500\u2500 *\/\n.warning-box {\n border: 1.5px solid var(--red);\n border-radius: 3px;\n background: var(--red-pale);\n padding: 3mm 4mm;\n margin-bottom: 4mm;\n}\n\n.warning-title {\n font-family: 'IBM Plex Mono', monospace;\n font-size: 6.5pt;\n font-weight: 700;\n letter-spacing: 0.08em;\n text-transform: uppercase;\n color: var(--red);\n margin-bottom: 2px;\n}\n\n.warning-text {\n font-family: 'Inter', sans-serif;\n font-size: 7.5pt;\n color: #5c1618;\n line-height: 1.6;\n}\n\n\/* \u2500\u2500 STANDARD CHIPS \u2500\u2500 *\/\n.std-row { display: flex; flex-wrap: wrap; gap: 2mm; margin-bottom: 3.5mm; }\n.std-pill {\n border: 1px solid var(--navy);\n padding: 1.5px 6px;\n border-radius: 2px;\n font-family: 'IBM Plex Mono', monospace;\n font-size: 6.8pt;\n font-weight: 600;\n color: var(--navy);\n white-space: nowrap;\n}\n\n\/* \u2500\u2500 KV GRID \u2500\u2500 *\/\n.kv-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 2mm; margin-bottom: 4mm; }\n.kv-item { background: var(--grey-bg); border: 1px solid var(--rule); border-radius: 3px; padding: 2.5mm 3mm; }\n.kv-label { font-size: 6.3pt; color: var(--grey); margin-bottom: 2px; font-weight: 500; }\n.kv-val { font-family: 'IBM Plex Mono', monospace; font-size: 8.8pt; font-weight: 600; color: var(--navy); }\n.kv-val.green { color: var(--green); }\n.kv-val.copper { color: var(--copper-dk); }\n.kv-val.red { color: var(--red); }\n\n\/* \u2500\u2500 FOOTNOTE \u2500\u2500 *\/\n.footnote {\n font-family: 'Inter', sans-serif;\n font-size: 6.8pt;\n color: var(--grey);\n line-height: 1.6;\n padding-top: 2mm;\n border-top: 1px solid var(--rule);\n margin-top: 2mm;\n}\n\n\/* \u2500\u2500 CONTACT BLOCK \u2500\u2500 *\/\n.contact-block { background: var(--navy-deep); border-radius: 3px; padding: 4mm 5mm; }\n.contact-brand { font-family: 'Playfair Display', serif; font-size: 11pt; font-weight: 700; color: #fff; margin-bottom: 1px; }\n.contact-sub { font-family: 'IBM Plex Mono', monospace; font-size: 6.3pt; color: rgba(255,255,255,0.36); letter-spacing: 0.05em; margin-bottom: 3.5mm; }\n.contact-row { display: flex; gap: 2.5mm; align-items: flex-start; margin-bottom: 2.5mm; }\n.c-icon { font-size: 8.5pt; flex-shrink: 0; opacity: 0.6; margin-top: 1px; }\n.c-info { font-family: 'Inter', sans-serif; font-size: 7.5pt; color: rgba(255,255,255,0.72); line-height: 1.5; }\n.c-info a { color: #d4904a; text-decoration: none; }\n.c-info strong { color: #fff; }\n.c-note { font-family: 'Inter', sans-serif; font-size: 6.3pt; color: rgba(255,255,255,0.30); margin-top: 2.5mm; padding-top: 2.5mm; border-top: 1px solid rgba(255,255,255,0.07); line-height: 1.6; }\n\n\/* \u2500\u2500 IP NOTICE \u2500\u2500 *\/\n.ip-notice {\n border: 1px solid var(--gold);\n border-radius: 3px;\n background: var(--gold-pale);\n padding: 2.5mm 3.5mm;\n font-family: 'Inter', sans-serif;\n font-size: 6.8pt;\n color: #6b5215;\n line-height: 1.6;\n margin-top: 3mm;\n}\n.ip-notice strong { color: #8a6a1a; }\n\n\/* \u2500\u2500 PAGE FOOTER \u2500\u2500 *\/\n.page-footer { position: absolute; bottom: 0; left: 0; right: 0; }\n.footer-gold-rule { height: 1.5px; background: linear-gradient(90deg, var(--gold), rgba(196,151,58,0.15)); margin: 0 12mm; }\n.footer-row { display: flex; justify-content: space-between; align-items: center; padding: 2mm 12mm; }\n.footer-left { font-family: 'Inter', sans-serif; font-size: 6.3pt; color: var(--grey); }\n.footer-right { font-family: 'IBM Plex Mono', monospace; font-size: 6pt; color: var(--grey-lt); text-align: right; letter-spacing: 0.04em; }\n\n\/* \u2500\u2500 SUBSECTION TITLE \u2500\u2500 *\/\n.sub-sec {\n font-family: 'Playfair Display', serif;\n font-size: 8.8pt;\n font-weight: 600;\n font-style: italic;\n color: var(--navy);\n margin: 3.5mm 0 2.5mm 0;\n padding-left: 3mm;\n border-left: 2px solid var(--copper);\n}\n\n\/* \u2500\u2500 APPLICATION CARDS \u2500\u2500 *\/\n.app-card {\n border: 1px solid var(--rule);\n border-radius: 3px;\n padding: 3mm 3.5mm;\n background: var(--warm);\n margin-bottom: 3mm;\n}\n\n.app-card-head {\n display: flex;\n align-items: center;\n gap: 2.5mm;\n margin-bottom: 2mm;\n}\n\n.app-num {\n font-family: 'IBM Plex Mono', monospace;\n font-size: 7pt;\n font-weight: 700;\n color: #fff;\n background: var(--navy);\n padding: 1px 5px;\n border-radius: 2px;\n white-space: nowrap;\n}\n\n.app-title {\n font-family: 'Inter', sans-serif;\n font-size: 8pt;\n font-weight: 700;\n color: var(--navy);\n}\n\n.app-desc {\n font-family: 'Inter', sans-serif;\n font-size: 7.4pt;\n color: var(--slate);\n line-height: 1.6;\n}\n\n\/* \u2500\u2500 SEPARATOR \u2500\u2500 *\/\n.sec-sep { height: 1px; background: var(--rule); margin: 4mm 0; }\n\n<\/style>\n<\/head>\n<body>\n\n\n<div class=\"page\">\n<div class=\"page-inner\">\n\n <div class=\"gold-stripe\"><\/div>\n\n <div class=\"doc-header\">\n <div class=\"header-top-row\">\n <div>\n <div class=\"brand-name\">FeiChun Special Cables Co., Ltd.<\/div>\n <div class=\"brand-sub\">\u5b89\u5fbd\u98de\u7eaf\u7279\u79cd\u7535\u7f06\u6709\u9650\u516c\u53f8 \u00b7 Hefei, Anhui, P.R. China<\/div>\n <\/div>\n <div class=\"doc-meta\">\n <div class=\"doc-id\">FC-TDS-UNE22511-2026-EN01<\/div>\n <div class=\"doc-lang\">Technical Specification \u00b7 Rev 1.0 \u00b7 May 2026 \u00b7 English<\/div>\n <\/div>\n <\/div>\n\n <div class=\"product-block\">\n <div>\n <div class=\"product-cat\">Flexible Underground Mining Drag Cable \u00b7 Unarmoured<\/div>\n <div class=\"product-name\">UNE 22511<\/div>\n <div class=\"product-full-title\">\n “Cables flexibles para miner\u00eda subterr\u00e1nea con tensiones de 1,8\/3 kV<br>\n con aislamiento de caucho, sin armadura”<br>\n Flexible unarmoured rubber-insulated power cables for underground mobile mining equipment, 1.8\/3 kV\n <\/div>\n <\/div>\n\n \n <svg width=\"118\" height=\"118\" viewBox=\"0 0 118 118\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" style=\"flex-shrink:0;margin-left:8mm;\">\n \n <circle cx=\"59\" cy=\"59\" r=\"56\" fill=\"#1a1f2e\"\/>\n \n <circle cx=\"59\" cy=\"59\" r=\"56\" fill=\"none\" stroke=\"#2d3748\" stroke-width=\"1\"\/>\n \n <circle cx=\"59\" cy=\"59\" r=\"42\" fill=\"#151b2c\"\/>\n \n \n <circle cx=\"59\" cy=\"31\" r=\"14\" fill=\"#1a2e60\"\/>\n <circle cx=\"59\" cy=\"31\" r=\"10.5\" fill=\"#c48030\"\/>\n <circle cx=\"59\" cy=\"31\" r=\"8\" fill=\"#d4904a\"\/>\n <text x=\"59\" y=\"34\" text-anchor=\"middle\" font-family=\"'IBM Plex Mono',monospace\" font-size=\"5.5\" fill=\"rgba(255,255,255,0.8)\" font-weight=\"600\">L1<\/text>\n \n <circle cx=\"36\" cy=\"72\" r=\"14\" fill=\"#1a2e60\"\/>\n <circle cx=\"36\" cy=\"72\" r=\"10.5\" fill=\"#c48030\"\/>\n <circle cx=\"36\" cy=\"72\" r=\"8\" fill=\"#d4904a\"\/>\n <text x=\"36\" y=\"75\" text-anchor=\"middle\" font-family=\"'IBM Plex Mono',monospace\" font-size=\"5.5\" fill=\"rgba(255,255,255,0.8)\" font-weight=\"600\">L2<\/text>\n \n <circle cx=\"82\" cy=\"72\" r=\"14\" fill=\"#1a2e60\"\/>\n <circle cx=\"82\" cy=\"72\" r=\"10.5\" fill=\"#c48030\"\/>\n <circle cx=\"82\" cy=\"72\" r=\"8\" fill=\"#d4904a\"\/>\n <text x=\"82\" y=\"75\" text-anchor=\"middle\" font-family=\"'IBM Plex Mono',monospace\" font-size=\"5.5\" fill=\"rgba(255,255,255,0.8)\" font-weight=\"600\">L3<\/text>\n \n \n <circle cx=\"82\" cy=\"46\" r=\"7\" fill=\"#1e3a5c\"\/>\n <circle cx=\"82\" cy=\"46\" r=\"4.5\" fill=\"#6a8a3a\"\/>\n <text x=\"82\" y=\"48.5\" text-anchor=\"middle\" font-family=\"'IBM Plex Mono',monospace\" font-size=\"4.5\" fill=\"rgba(255,255,255,0.85)\">S1<\/text>\n \n <circle cx=\"36\" cy=\"46\" r=\"7\" fill=\"#1e3a5c\"\/>\n <circle cx=\"36\" cy=\"46\" r=\"4.5\" fill=\"#6a8a3a\"\/>\n <text x=\"36\" y=\"48.5\" text-anchor=\"middle\" font-family=\"'IBM Plex Mono',monospace\" font-size=\"4.5\" fill=\"rgba(255,255,255,0.85)\">S1<\/text>\n \n <circle cx=\"59\" cy=\"87\" r=\"7\" fill=\"#1e3a5c\"\/>\n <circle cx=\"59\" cy=\"87\" r=\"4.5\" fill=\"#6a8a3a\"\/>\n <text x=\"59\" y=\"89.5\" text-anchor=\"middle\" font-family=\"'IBM Plex Mono',monospace\" font-size=\"4.5\" fill=\"rgba(255,255,255,0.85)\">S1<\/text>\n \n <circle cx=\"59\" cy=\"59\" r=\"3\" fill=\"#d4a030\"\/>\n <circle cx=\"51\" cy=\"52\" r=\"3\" fill=\"#d4a030\"\/>\n <circle cx=\"67\" cy=\"52\" r=\"3\" fill=\"#d4a030\"\/>\n \n <text x=\"59\" y=\"72\" text-anchor=\"middle\" font-family=\"'IBM Plex Mono',monospace\" font-size=\"4\" fill=\"rgba(212,160,48,0.7)\">S2\u00d73<\/text>\n \n <text x=\"59\" y=\"111\" text-anchor=\"middle\" font-family=\"'IBM Plex Mono',monospace\" font-size=\"7\" fill=\"rgba(255,255,255,0.35)\">\u00d8\u224854 mm (95mm\u00b2)<\/text>\n \n <line x1=\"96\" y1=\"20\" x2=\"74\" y2=\"31\" stroke=\"rgba(255,255,255,0.18)\" stroke-width=\"0.6\"\/>\n <text x=\"98\" y=\"19\" font-family=\"'IBM Plex Mono',monospace\" font-size=\"5\" fill=\"rgba(255,255,255,0.28)\">EPR ins.<\/text>\n <line x1=\"100\" y1=\"72\" x2=\"89\" y2=\"66\" stroke=\"rgba(255,255,255,0.18)\" stroke-width=\"0.6\"\/>\n <text x=\"102\" y=\"73\" font-family=\"'IBM Plex Mono',monospace\" font-size=\"5\" fill=\"rgba(106,138,58,0.7)\">S1 earth<\/text>\n <line x1=\"100\" y1=\"87\" x2=\"95\" y2=\"87\" stroke=\"rgba(255,255,255,0.15)\" stroke-width=\"0.6\"\/>\n <text x=\"102\" y=\"89\" font-family=\"'IBM Plex Mono',monospace\" font-size=\"5\" fill=\"rgba(255,255,255,0.22)\">CPE\/PCP<\/text>\n <\/svg>\n <\/div>\n\n <div class=\"rating-band\">\n <div class=\"rating-chip\">\n <div class=\"r-val\">1.8\/3 kV<\/div>\n <div class=\"r-lbl\">Rated Voltage U\u2080\/U<\/div>\n <\/div>\n <div class=\"rating-chip\">\n <div class=\"r-val\">IEC 60228 Cl.5<\/div>\n <div class=\"r-lbl\">Conductor Class<\/div>\n <\/div>\n <div class=\"rating-chip\">\n <div class=\"r-val\">EPR \/ EM5<\/div>\n <div class=\"r-lbl\">Insulation Compound<\/div>\n <\/div>\n <div class=\"rating-chip\">\n <div class=\"r-val\">3\u00d7S1 + 3\u00d7S2<\/div>\n <div class=\"r-lbl\">Earth Architecture<\/div>\n <\/div>\n <div class=\"rating-chip\">\n <div class=\"r-val\">CPE EM8 \/ PCP EM7<\/div>\n <div class=\"r-lbl\">Outer Sheath Grade<\/div>\n <\/div>\n <\/div>\n\n <div class=\"stat-bar\">\n <div class=\"stat-cell\">\n <div class=\"s-v\">\u2264 6\u00d7 O.D.<\/div>\n <div class=\"s-l\">Min. dynamic bend radius<\/div>\n <\/div>\n <div class=\"stat-cell\">\n <div class=\"s-v\">\u00b1180\u00b0\/m<\/div>\n <div class=\"s-l\">Torsional endurance test<\/div>\n <\/div>\n <div class=\"stat-cell\">\n <div class=\"s-v\">100 000 ckx<\/div>\n <div class=\"s-l\">Feichun design target<\/div>\n <\/div>\n <div class=\"stat-cell\">\n <div class=\"s-v\">16\u2013240 mm\u00b2<\/div>\n <div class=\"s-l\">Cross-section range<\/div>\n <\/div>\n <\/div>\n <\/div>\n\n <div class=\"body-pad\" style=\"padding-bottom:16mm;\">\n\n \n <div class=\"sec-head\" style=\"margin-top:4.5mm;\">\n <span class=\"sec-num\">\u00a7 1<\/span>\n <span class=\"sec-title\">Standard Overview & Geographic Scope<\/span>\n <\/div>\n\n <p class=\"body-text\">\n <strong>UNE 22511<\/strong>, published and maintained by AENOR (Asociaci\u00f3n Espa\u00f1ola de Normalizaci\u00f3n y Certificaci\u00f3n),\n is the definitive Spanish standard for heavy-duty power cables connecting underground mobile mining equipment to\n fixed electrical distribution networks. Operating as a specialized overlay on IEC 60502-1, it extends that base\n standard’s electrical requirements with stringent mechanical, safety, and flame-retardancy requirements specific\n to enclosed underground environments. Despite its Spanish origin, UNE 22511 enjoys adoption across the major\n Spanish-speaking mining economies: <strong>Chile, Peru, Colombia, Bolivia, and Mexico<\/strong>, where\n AENOR-certified cables are accepted by national mining safety regulators as the primary qualification pathway\n for underground mobile equipment power supply cables.\n <\/p>\n\n <div class=\"callout navy-c\">\n <span class=\"callout-icon\">\u26cf<\/span>\n <div>\n <div class=\"callout-head\">The Founding Engineering Principle<\/div>\n <div class=\"callout-body\">\n UNE 22511 is an <strong>unarmoured<\/strong> drag cable standard. The deliberate absence of metallic\n armour \u2014 counterintuitive in an abrasive environment \u2014 is the defining engineering choice that makes\n the standard viable. Steel wire armour in a torsionally-loaded cable acts as a progressive-failure\n torsional spring: each twist cycle accumulates irreversible plastic strain in the armour wires, leading\n to wire fractures within 10,000\u201330,000 cycles. For a shuttle car cable experiencing 80,000+ torsional\n cycles per year, armour represents not additional protection but a <em>built-in scheduled failure\n mechanism<\/em>. UNE 22511 eliminates this failure mode at source.\n <\/div>\n <\/div>\n <\/div>\n\n \n <div class=\"sec-head\">\n <span class=\"sec-num\">\u00a7 2<\/span>\n <span class=\"sec-title\">Application-Driven Design<\/span>\n <\/div>\n\n <div class=\"app-card\">\n <div class=\"app-card-head\">\n <span class=\"app-num\">2.1<\/span>\n <span class=\"app-title\">Continuous Miners & Coal Shearers (Rozadoras Continuas)<\/span>\n <\/div>\n <div class=\"app-desc\">A continuous miner advancing at 0.5\u20133 m\/min pulls its drag cable across rock or coal floor,\n reversing frequently as the machine repositions. At 60 m of trailing cable on a rock floor (\u03bc = 0.5\u20130.8), drag tension\n at the cable entry point ranges <strong>1,200\u20131,900 N<\/strong> sustained continuously. Simultaneous floor-contact abrasion\n and cyclic bending at the cable gland (65\u2013130 bending cycles\/day) demand Class 5 conductors, heavy-duty EM8\/EM7 sheath,\n and EPR insulation’s superior compression-set recovery.<\/div>\n <\/div>\n\n <div class=\"app-card\">\n <div class=\"app-card-head\">\n <span class=\"app-num\">2.2<\/span>\n <span class=\"app-title\">Shuttle Cars \u2014 The Most Mechanically Demanding Application<\/span>\n <\/div>\n <div class=\"app-desc\">Shuttle cars travelling at 5\u201315 km\/h make 20\u201350 round trips per hour. Corner negotiation imposes\n simultaneous <strong>bending at the drum anchor<\/strong>, <strong>torsion along the free span<\/strong> (\u00b190\u00b0 to \u00b1180\u00b0\/m),\n and <strong>tensile load from cable weight<\/strong>. At 40 round trips\/hour \u00d7 2,000 hr\/year, the cable accumulates\n approximately <strong>80,000 combined bending-torsion cycles annually<\/strong> at the drum anchor \u2014 the most destructive\n fatigue regime of any industrial cable application.<\/div>\n <\/div>\n\n <div class=\"callout red-c\">\n <span class=\"callout-icon\">\ud83d\udd2c<\/span>\n <div>\n <div class=\"callout-head\">Field Failure Mode Analysis \u2014 Three Fracture Loci on Shuttle Car Cables<\/div>\n <div class=\"callout-body\">\n Post-mortem sectioning of failed shuttle car cables consistently reveals fractures at: <strong>(1) The reel drum\n anchor fitting<\/strong> \u2014 highest combined bending + torsion stress; <strong>(2) Midpoint of the free span<\/strong> \u2014\n cumulative torsional fatigue, often undetectable by DC resistance testing until >15% of strands are broken;\n <strong>(3) The machine connection boot<\/strong> \u2014 fretting fatigue at the conductor-to-lug crimp interface.\n Feichun addresses loci (1) and (2) through lay direction optimization and fine-wire Class 5 architecture; locus (3)\n is addressed by specifying helical spring-boot strain relief glands with \u22655\u00d7 O.D. free-bend clearance length.\n <\/div>\n <\/div>\n <\/div>\n\n <\/div>\n\n <div class=\"page-footer\">\n <div class=\"footer-gold-rule\"><\/div>\n <div class=\"footer-row\">\n <div class=\"footer-left\">Page 1\/6 \u00b7 FeiChun Special Cables Co., Ltd. \u00b7 www.feichuncables.com<\/div>\n <div class=\"footer-right\">FC-TDS-UNE22511-2026-EN01 \u00b7 Rev 1.0<\/div>\n <\/div>\n <\/div>\n\n<\/div>\n<\/div>\n\n\n\n<div class=\"page\">\n<div class=\"page-inner\">\n\n <div class=\"page-cont-header\">\n <div class=\"cont-brand\">FEICHUN SPECIAL CABLES<\/div>\n <div class=\"cont-product\">UNE 22511 \u2014 Flexible Unarmoured Mining Drag Cable, 1.8\/3 kV<\/div>\n <div class=\"cont-doc\">FC-TDS-UNE22511-2026-EN01 \u00b7 Page 2\/6<\/div>\n <\/div>\n\n <div class=\"body-pad\" style=\"padding-bottom:16mm;\">\n\n <div class=\"sec-head\" style=\"margin-top:4mm;\">\n <span class=\"sec-num\">\u00a7 3<\/span>\n <span class=\"sec-title\">UNE 22511 vs. UNE 22512 \u2014 Definitive Technical Differentiation<\/span>\n <\/div>\n\n <p class=\"body-text\">\n The numbering proximity of UNE 22511 and UNE 22512 masks a <strong>fundamental engineering divergence<\/strong>.\n The two standards govern cable families optimised for mutually exclusive applications. Specifying a UNE 22512 cable\n in a UNE 22511 drag application \u2014 or vice versa \u2014 constitutes a serious engineering error with predictable failure consequences.\n <\/p>\n\n <table class=\"cmp-tbl\">\n <thead>\n <tr>\n <th style=\"width:30mm;\">Design Parameter<\/th>\n <th class=\"col-22511\" style=\"width:46mm;\">UNE 22511<br>Mobile Drag \/ Reel Cable<\/th>\n <th class=\"col-22512\" style=\"width:44mm;\">UNE 22512<br>Armoured Semi-Fixed Cable<\/th>\n <th class=\"col-conseq\" style=\"width:50mm;\">Engineering Consequence of Misapplication<\/th>\n <\/tr>\n <\/thead>\n <tbody>\n <tr>\n <td>Metallic armour<\/td>\n <td class=\"col-22511-d\"><strong>NONE \u2014 prohibited.<\/strong> Any metallic armour disqualifies a cable from UNE 22511 compliance.<\/td>\n <td class=\"col-22512-d\">Steel wire braid (Type B) or steel tape (Type C) \u2014 mandatory for crush and cut protection.<\/td>\n <td class=\"col-conseq-d\">22512 armour in drag duty: steel wires fracture in torsional fatigue within 10,000\u201330,000 cycles \u2014 typically 3\u20136 months of shuttle car service.<\/td>\n <\/tr>\n <tr>\n <td>Primary application<\/td>\n <td class=\"col-22511-d\">Continuous miners, shearers, shuttle cars, cable reels \u2014 <strong>continuous motion<\/strong>.<\/td>\n <td class=\"col-22512-d\">Gate road trailing cables, face switchgear tails, conveyor leads \u2014 <strong>occasional repositioning<\/strong>.<\/td>\n <td class=\"col-conseq-d\">Frequency of movement drives cumulative fatigue; 22511 is designed for millions of combined cycles vs. 22512’s hundreds of thousands.<\/td>\n <\/tr>\n <tr>\n <td>Conductor class<\/td>\n <td class=\"col-22511-d\"><strong>IEC 60228 Class 5 mandatory;<\/strong> Feichun: wire \u2205 \u2264 0.25 mm for \u226550 mm\u00b2.<\/td>\n <td class=\"col-22512-d\">Class 4 or Class 5 permitted; Class 4 acceptable for lower torsional duty of semi-fixed trailing.<\/td>\n <td class=\"col-conseq-d\">Class 4 conductors in 22511 drag duty: torsional shear stress approaches copper fatigue limit at \u00b1180\u00b0\/m. Wire fractures within ~200,000 cycles.<\/td>\n <\/tr>\n <tr>\n <td>Min. dynamic bend radius<\/td>\n <td class=\"col-22511-d\"><strong>\u2264 6\u00d7 O.D.<\/strong> for reel\/shuttle car; EPR permits \u2264 5\u00d7 in Feichun construction.<\/td>\n <td class=\"col-22512-d\">10\u201312\u00d7 O.D. \u2014 steel armour imposes this minimum; smaller radius fractures armour wires on first cycle.<\/td>\n <td class=\"col-conseq-d\">For 95 mm\u00b2 (O.D. \u2248 54 mm): 22511 min. bend = 270 mm; 22512 min. bend = 540\u2013648 mm \u2014 50\u201360% larger drum required.<\/td>\n <\/tr>\n <tr>\n <td>Earth core arrangement<\/td>\n <td class=\"col-22511-d\"><strong>3\u00d7S1 + 3\u00d7S2 symmetric distributed<\/strong> \u2014 mandatory for torsional balance and EMC compliance.<\/td>\n <td class=\"col-22512-d\">Single combined earth core (S1) with optional S2 pilot; asymmetric placement acceptable.<\/td>\n <td class=\"col-conseq-d\">Single asymmetric earth in 22511 drag duty introduces eccentric bending stiffness \u2192 cable corkscrews under torsion \u2192 accelerated insulation fatigue.<\/td>\n <\/tr>\n <tr>\n <td>Torsional endurance test<\/td>\n <td class=\"col-22511-d\">\u00b1180\u00b0\/m for minimum <strong>10,000 cycles<\/strong>; Feichun design target <strong>100,000 cycles<\/strong>.<\/td>\n <td class=\"col-22512-d\">No torsional endurance test \u2014 armour geometry makes the test physically meaningless.<\/td>\n <td class=\"col-conseq-d\">Absence of this test from 22512 qualification is proof that the two cable families are designed for incompatible mechanical loading.<\/td>\n <\/tr>\n <tr>\n <td>Outer sheath spec.<\/td>\n <td class=\"col-22511-d\"><strong>Heavy-duty CPE (EM8) or PCP (EM7);<\/strong> sheath is the sole mechanical barrier without armour.<\/td>\n <td class=\"col-22512-d\">Standard CPE or PCP inner sheath under armour; armour provides primary mechanical protection.<\/td>\n <td class=\"col-conseq-d\">22511’s EM8\/EM7 grades require Shore A \u226570 and minimum 4 mm nominal sheath wall in large sections \u2014 substantially heavier than 22512 inner sheath.<\/td>\n <\/tr>\n <tr>\n <td>Design service life<\/td>\n <td class=\"col-22511-d\">3\u20135 years in shuttle car application \u2014 aggressive operations replace annually.<\/td>\n <td class=\"col-22512-d\">8\u201315 years in semi-fixed trailing duty (lower cumulative fatigue).<\/td>\n <td class=\"col-conseq-d\">22512 installed in 22511 drag duty: armour fails at 3\u20136 months; subsequently insulation is exposed to abrasion and tread-over damage.<\/td>\n <\/tr>\n <\/tbody>\n <\/table>\n\n <div class=\"warning-box\">\n <div class=\"warning-title\">\u26a0 Critical Procurement Warning \u2014 Confirm the Standard Before Specifying<\/div>\n <div class=\"warning-text\">\n Feichun has received RFQs from procurement teams citing maintenance records for “UNE 22511” cables that,\n upon cross-checking, were clearly UNE 22512 cables installed in drag duty. Before placing a replacement\n cable order, verify the standard designation from the cable’s own surface markings (required under\n IEC 60502-1 at regular intervals). If in doubt, send a photograph of the existing cable marking to\n <strong>Tech@feichuncables.com<\/strong> for free identification and application guidance.\n <\/div>\n <\/div>\n\n \n <div class=\"sec-head\">\n <span class=\"sec-num\">\u00a7 4<\/span>\n <span class=\"sec-title\">Applicable Standards & Regulatory Compliance Overview<\/span>\n <\/div>\n\n <div class=\"std-row\">\n <span class=\"std-pill\">UNE 22511<\/span>\n <span class=\"std-pill\">IEC 60502-1:2022<\/span>\n <span class=\"std-pill\">IEC 60228 Cl.5<\/span>\n <span class=\"std-pill\">IEC 60811<\/span>\n <span class=\"std-pill\">UNE-EN 50265-2-2<\/span>\n <span class=\"std-pill\">IEC 60332-2-2<\/span>\n <span class=\"std-pill\">IEC 60754-1<\/span>\n <span class=\"std-pill\">IEC 61034-2<\/span>\n <span class=\"std-pill\">RD 150\/1996 (ES)<\/span>\n <span class=\"std-pill\">DS 132\/2004 SERNAGEOMIN (CL)<\/span>\n <span class=\"std-pill\">DS 023-2017-EM (PE)<\/span>\n <span class=\"std-pill\">Decreto 1886\/2015 (CO)<\/span>\n <\/div>\n\n <div class=\"three-col\">\n <div class=\"feature-card navy\">\n <div class=\"fc-name\">Spain \u2014 AENOR<\/div>\n <div class=\"fc-desc\">UNE 22511 type test by AENOR-accredited lab. Required under RD 150\/1996 (Art. 109 ECMR mandate). Flame, acid gas, and smoke certificates per batch. S2 resistance per 100m for ECMR relay setting.<\/div>\n <\/div>\n <div class=\"feature-card copper\">\n <div class=\"fc-name\">Chile \u2014 SERNAGEOMIN<\/div>\n <div class=\"fc-desc\">Full Spanish-language dossier structured to match SERNAGEOMIN review format: type test, IEC 60754-1 \/ 61034-2 certificates, factory test records per drum, dimensional inspection report, S2 pilot resistance value.<\/div>\n <\/div>\n <div class=\"feature-card green\">\n <div class=\"fc-name\">Peru \u00b7 Colombia \u00b7 Bolivia \u00b7 Mexico<\/div>\n <div class=\"fc-desc\">DS 023-2017-EM (PE), Decreto 1886\/2015 (CO), NOM-023-STPS-2012 (MX) all reference IEC 60502-1 and UNE 22511. Feichun type test certificates are prepared in formats accepted by competent authorities across all jurisdictions.<\/div>\n <\/div>\n <\/div>\n\n <\/div>\n\n <div class=\"page-footer\">\n <div class=\"footer-gold-rule\"><\/div>\n <div class=\"footer-row\">\n <div class=\"footer-left\">Page 2\/6 \u00b7 FeiChun Special Cables Co., Ltd. \u00b7 www.feichuncables.com<\/div>\n <div class=\"footer-right\">FC-TDS-UNE22511-2026-EN01 \u00b7 Rev 1.0<\/div>\n <\/div>\n <\/div>\n\n<\/div>\n<\/div>\n\n\n\n<div class=\"page\">\n<div class=\"page-inner\">\n\n <div class=\"page-cont-header\">\n <div class=\"cont-brand\">FEICHUN SPECIAL CABLES<\/div>\n <div class=\"cont-product\">UNE 22511 \u2014 Flexible Unarmoured Mining Drag Cable, 1.8\/3 kV<\/div>\n <div class=\"cont-doc\">FC-TDS-UNE22511-2026-EN01 \u00b7 Page 3\/6<\/div>\n <\/div>\n\n <div class=\"body-pad\" style=\"padding-bottom:16mm;\">\n\n <div class=\"sec-head\" style=\"margin-top:4mm;\">\n <span class=\"sec-num\">\u00a7 5<\/span>\n <span class=\"sec-title\">Conductor: IEC 60228 Class 5 \u2014 Wire Diameter Analysis & Torsional Fatigue Mechanics<\/span>\n <\/div>\n\n <p class=\"body-text\">\n IEC 60228 Class 5 defines a <em>maximum<\/em> individual wire diameter for each cross-section \u2014 but not a minimum.\n Manufacturers have full latitude to use finer wires, and doing so substantially improves fatigue life. The relationship\n between wire diameter and torsional fatigue life follows directly from the shear stress equation for a circular wire under torsion:\n <\/p>\n\n <div class=\"formula-block\">\n <div class=\"formula-label\">Torsional Shear Stress in Individual Conductor Wire (\u00b1180\u00b0\/m \u2014 Shuttle Car Corner Negotiation)<\/div>\n <div class=\"formula-text\">\u03c4 = G \u00d7 \u03b8 \u00d7 r \/ L where G = 45 GPa (Cu), \u03b8 = \u03c0 rad (180\u00b0), r = wire radius, L = 1 m free span\n\u03c4_fatigue_limit (ETP Cu, 10\u2077 cycles) = 150\u2013180 MPa [ASTM E606, R = \u22121 torsion]<\/div>\n <div class=\"formula-note\">Safety margin = \u03c4_fatigue_limit \/ \u03c4_calculated. A margin <1.2\u00d7 correlates to accelerated wire fracture within 200,000 cycles in shuttle car duty.<\/div>\n <\/div>\n\n <table class=\"stress-tbl\">\n <thead>\n <tr>\n <th>Conductor Wire Grade<\/th>\n <th>Wire Diameter<\/th>\n <th>Calculated \u03c4 (MPa)<\/th>\n <th>Safety Margin<\/th>\n <th>Feichun Assessment<\/th>\n <\/tr>\n <\/thead>\n <tbody>\n <tr class=\"row-fail\">\n <td style=\"font-weight:700;color:var(--red);\">Class 4 (non-compliant)<\/td>\n <td class=\"mono\">\u2205 0.41 mm<\/td>\n <td class=\"mono\" style=\"color:var(--red);font-weight:700;\">~145 MPa<\/td>\n <td class=\"mono\" style=\"color:var(--red);font-weight:700;\">< 1.2\u00d7<\/td>\n <td style=\"color:var(--red);font-weight:600;font-size:7pt;\">NOT for UNE 22511 drag duty. Approaches copper fatigue limit; fracture within ~200,000 cycles.<\/td>\n <\/tr>\n <tr class=\"row-warn\">\n <td style=\"font-weight:700;color:var(--amber);\">Class 5, coarse end<\/td>\n <td class=\"mono\">\u2205 0.31 mm<\/td>\n <td class=\"mono\" style=\"color:var(--amber);font-weight:700;\">~110 MPa<\/td>\n <td class=\"mono\">~1.5\u00d7<\/td>\n <td style=\"font-size:7pt;\">Standard-compliant. Adequate for lower-duty applications; not recommended for intensive shuttle car duty.<\/td>\n <\/tr>\n <tr class=\"row-ok\">\n <td style=\"font-weight:700;color:var(--green);\">Class 5, Feichun standard<\/td>\n <td class=\"mono\" style=\"color:var(--green);font-weight:700;\">\u2264 0.25 mm (for \u226550 mm\u00b2)<\/td>\n <td class=\"mono\" style=\"color:var(--green);font-weight:700;\">~88 MPa<\/td>\n <td class=\"mono\" style=\"color:var(--green);font-weight:700;\">~1.8\u00d7<\/td>\n <td style=\"color:var(--green);font-size:7pt;font-weight:600;\">Feichun production standard. Target range for reliable 2+ year shuttle car service.<\/td>\n <\/tr>\n <tr class=\"row-best\">\n <td style=\"color:#0369A1;font-weight:700;\">Class 6 (extreme duty)<\/td>\n <td class=\"mono\" style=\"color:#0369A1;\">\u2205 0.10 mm<\/td>\n <td class=\"mono\" style=\"color:#0369A1;\">~35 MPa<\/td>\n <td class=\"mono\" style=\"color:#0369A1;\">> 4\u00d7<\/td>\n <td style=\"font-size:7pt;color:#075985;\">Appropriate for extreme duty. Not required by UNE 22511 but available on special order.<\/td>\n <\/tr>\n <\/tbody>\n <\/table>\n\n <div class=\"two-col\" style=\"margin-bottom:4mm;\">\n <div>\n <div class=\"sub-sec\">4.2 Lay Direction & Pitch Ratio<\/div>\n <p class=\"body-text\" style=\"margin-bottom:2mm;\">\n A right-hand (Z) outer lay on a right-hand drum causes the cable to untwist when paid out under tension,\n generating a stored torsional pre-load that <em>adds<\/em> to machine-induced torsion. Feichun specifies\n conductor lay direction matched to the predominant drum rotation direction of the customer’s equipment \u2014\n a detail requiring engineering dialogue at order placement but yielding meaningful fatigue life improvement\n at no material cost.\n <\/p>\n <p class=\"body-text\">\n Lay pitch ratio of <strong>12:1 to 18:1<\/strong> is empirically validated as the optimum for shuttle car\n reel duty through Feichun’s 500,000-cycle combined bending-torsion qualification testing.\n <\/p>\n <\/div>\n <div>\n <div class=\"sub-sec\">4.3 Tinned Copper \u2014 Two Justifications<\/div>\n <div class=\"callout copper-c\" style=\"margin-bottom:2.5mm;\">\n <div>\n <div class=\"callout-head\">Corrosion prevention<\/div>\n <div class=\"callout-body\">Underground mines maintain 85\u2013100% relative humidity year-round. In sulfide ore mines (H\u2082S, SO\u2082 atmosphere), bare copper develops CuS\/Cu\u2082S tarnish within 6\u201312 months, elevating DC resistance above IEC 60228 limits. Tin plating (SnO\u2082 passivation) completely suppresses surface attack over the cable’s service life.<\/div>\n <\/div>\n <\/div>\n <div class=\"callout green-c\">\n <div>\n <div class=\"callout-head\">Field termination reliability<\/div>\n <div class=\"callout-body\">Shuttle car cables are terminated 4\u20138 times per cable life in field conditions. Bare copper requires wire brushing before crimping to achieve metal-to-metal contact \u2014 a step frequently skipped in practice. Tinned conductors achieve reliable low-resistance crimps regardless of surface condition; tin’s soft oxide is displaced by crimp compression force.<\/div>\n <\/div>\n <\/div>\n <\/div>\n <\/div>\n\n \n <div class=\"sec-head\">\n <span class=\"sec-num\">\u00a7 6<\/span>\n <span class=\"sec-title\">Insulation: EPR Compound EM5 \u2014 Engineering Rationale<\/span>\n <\/div>\n\n <p class=\"body-text\">\n EPR (ethylene-propylene rubber) insulation is not merely the UNE 22511 specification’s preference \u2014 it is the only\n insulation material that satisfies the combined thermal, mechanical, chemical, and electrical performance requirements\n of underground mobile mining equipment. The following analysis explains why PVC and XLPE fail on multiple dimensions.\n <\/p>\n\n <table class=\"spec-tbl green-head\">\n <thead>\n <tr>\n <th>Performance Dimension<\/th>\n <th>EPR \/ EM5<\/th>\n <th>PVC<\/th>\n <th>XLPE<\/th>\n <\/tr>\n <\/thead>\n <tbody>\n <tr>\n <td>Continuous conductor rating<\/td>\n <td class=\"hi-green\">90\u00b0C<\/td>\n <td class=\"hi-red\">70\u00b0C (\u221222% current capacity)<\/td>\n <td class=\"mono\">90\u00b0C<\/td>\n <\/tr>\n <tr>\n <td>Post-fault mechanical recovery<\/td>\n <td class=\"hi-green\">Elastomeric \u2014 springs back after 250\u00b0C SC event. Cable may be returned to service after IR test.<\/td>\n <td class=\"hi-red\">Irreversible thermal decomposition at SC temperature \u2192 permanently brittle. Cable replacement required.<\/td>\n <td class=\"mono\">Partial recovery only; semi-crystalline structure retains some damage.<\/td>\n <\/tr>\n <tr>\n <td>Compression set (tread-over)<\/td>\n <td class=\"hi-green\">< 20% set after 24h at 70\u00b0C<\/td>\n <td class=\"mono\">\u2014<\/td>\n <td class=\"hi-red\">35\u201355% permanent set \u2014 flat-spot becomes stress concentration site for fatigue fracture.<\/td>\n <\/tr>\n <tr>\n <td>Water tree resistance<\/td>\n <td class=\"hi-green\">Amorphous structure: no crystalline-amorphous interface to nucleate tree initiation. 3\u20135\u00d7 lag factor over XLPE in IEC 60840 test.<\/td>\n <td class=\"mono\">\u2014<\/td>\n <td class=\"hi-red\">Semi-crystalline: water tree initiation at crystalline boundaries in sustained wet conditions.<\/td>\n <\/tr>\n <tr>\n <td>Cold flexibility<\/td>\n <td class=\"hi-green\">No cracking at \u221225\u00b0C (EM5 requirement)<\/td>\n <td class=\"hi-red\">Brittle below \u22125\u00b0C; sheath cracks under winter storage handling.<\/td>\n <td class=\"mono\">Acceptable to \u221240\u00b0C (XLPE insulation grade dependent).<\/td>\n <\/tr>\n <\/tbody>\n <\/table>\n\n <div class=\"callout gold-c\">\n <span class=\"callout-icon\">\ud83d\udccb<\/span>\n <div>\n <div class=\"callout-head\">IEC 60502-1:2022 \u2014 EPR Compound EM5 Specification<\/div>\n <div class=\"callout-body\">\n Min. tensile strength: 5.0 N\/mm\u00b2. Min. elongation at break: 200%. Thermal ageing at 135\u00b0C \u00b12\u00b0C \/ 7 days:\n elongation variation \u2264 \u00b130%; tensile variation \u2264 \u00b125%. Cold flexibility at \u221225\u00b0C: no cracking.\n Under the Arrhenius thermal ageing model, a cable operating continuously at 90\u00b0C with EM5 compound has a\n projected insulation life exceeding <strong>30 years<\/strong> \u2014 well beyond the 3\u20135 year replacement cycle\n of a shuttle car drag cable.\n <\/div>\n <\/div>\n <\/div>\n\n <\/div>\n\n <div class=\"page-footer\">\n <div class=\"footer-gold-rule\"><\/div>\n <div class=\"footer-row\">\n <div class=\"footer-left\">Page 3\/6 \u00b7 FeiChun Special Cables Co., Ltd. \u00b7 www.feichuncables.com<\/div>\n <div class=\"footer-right\">FC-TDS-UNE22511-2026-EN01 \u00b7 Rev 1.0<\/div>\n <\/div>\n <\/div>\n\n<\/div>\n<\/div>\n\n\n\n<div class=\"page\">\n<div class=\"page-inner\">\n\n <div class=\"page-cont-header\">\n <div class=\"cont-brand\">FEICHUN SPECIAL CABLES<\/div>\n <div class=\"cont-product\">UNE 22511 \u2014 Flexible Unarmoured Mining Drag Cable, 1.8\/3 kV<\/div>\n <div class=\"cont-doc\">FC-TDS-UNE22511-2026-EN01 \u00b7 Page 4\/6<\/div>\n <\/div>\n\n <div class=\"body-pad\" style=\"padding-bottom:16mm;\">\n\n <div class=\"sec-head\" style=\"margin-top:4mm;\">\n <span class=\"sec-num\">\u00a7 7<\/span>\n <span class=\"sec-title\">The 3\u00d7S1 + 3\u00d7S2 Earth Core Architecture \u2014 Four Engineering Arguments<\/span>\n <\/div>\n\n <p class=\"body-text\">\n The earth core arrangement of a UNE 22511 cable is the structural element that most clearly distinguishes this standard\n from IEC 60502-1 industrial cables. The <strong>3\u00d7S1 + 3\u00d7S2 configuration<\/strong> \u2014 six earth conductors in symmetric\n positions around the three main phase cores \u2014 simultaneously solves four independent engineering problems:\n <\/p>\n\n <div class=\"two-col\" style=\"margin-bottom:3mm;\">\n <div>\n <div class=\"callout navy-c\" style=\"margin-bottom:3mm;\">\n <div>\n <div class=\"callout-head\">Argument 1 \u2014 Electromagnetic Symmetry<\/div>\n <div class=\"callout-body\">\n A single asymmetric earth conductor generates a non-zero net magnetic dipole from fault current return,\n producing stray fields that decay as 1\/r\u00b2 \u2014 sufficient to induce spurious trips in adjacent earth-leakage\n protection relays (15\u201330 mA operating current) during controlled fault events. Three S1 conductors at 120\u00b0\n spacing cancel net dipole moment, reducing stray field decay to 1\/r\u00b3 (magnetic quadrupole) \u2014\n approximately <strong>15\u201325%<\/strong> of the single-earth value at 1 m distance for the same fault current.\n <\/div>\n <\/div>\n <\/div>\n <div class=\"callout copper-c\">\n <div>\n <div class=\"callout-head\">Argument 2 \u2014 Mechanical Balance & Torsional Stability<\/div>\n <div class=\"callout-body\">\n A single large earth core (e.g., 35 mm\u00b2 in one interstice of a 3\u00d795 mm\u00b2 cable) introduces geometric\n asymmetry, producing a <em>preferred bending plane<\/em>. Under torsional loading, the cable “corkscrews”\n along this plane, inducing secondary bending stresses that dramatically accelerate insulation fatigue.\n Three S1 cores at 120\u00b0 distribution produce identical bending stiffness in all planes, ensuring\n <strong>pure torsional deformation<\/strong> under torsional loading \u2014 eliminating the corkscrew mechanism.\n <\/div>\n <\/div>\n <\/div>\n <\/div>\n <div>\n <div class=\"callout green-c\" style=\"margin-bottom:3mm;\">\n <div>\n <div class=\"callout-head\">Argument 3 \u2014 Fault Current Distribution<\/div>\n <div class=\"callout-body\">\n Under a single-phase-to-earth fault, all three S1 conductors carry fault current in parallel. Each carries\n one-third of total fault current; the I\u00b2R heating in each S1 is therefore <strong>one-ninth<\/strong> of\n what it would be in a single-earth design of the same total cross-section. This provides nine times more\n protection relay operating time before thermal cable damage occurs \u2014 critical for coordination with\n upstream circuit breakers.\n <\/div>\n <\/div>\n <\/div>\n <div class=\"callout gold-c\">\n <div>\n <div class=\"callout-head\">Argument 4 \u2014 S2 Pilot Core & ECMR (Earth Continuity Monitoring)<\/div>\n <div class=\"callout-body\">\n The three S2 pilot cores (typically 1\u20134 mm\u00b2) are <em>not<\/em> intended to carry fault current. They form\n the ECMR circuit \u2014 mandated by <strong>Real Decreto 150\/1996<\/strong> (Spain) and equivalent Chilean,\n Peruvian, and Colombian mining regulations \u2014 continuously measuring DC resistance of the S2 loop.\n Mechanical damage severing any S2 core triggers upstream circuit breaker trip before the protective earth\n function (S1) is compromised, providing advance warning before personnel safety is at risk.\n Feichun provides the per-100m S2 resistance value with each cable order for ECMR relay trip threshold setting.\n <\/div>\n <\/div>\n <\/div>\n <\/div>\n <\/div>\n\n \n <div class=\"sec-head\">\n <span class=\"sec-num\">\u00a7 8<\/span>\n <span class=\"sec-title\">Why No Armour? The Engineering Case for Deliberate Absence of Steel Reinforcement<\/span>\n <\/div>\n\n <div class=\"two-col\">\n <div>\n <div class=\"sub-sec\">The Torsional Spring Failure Mechanism<\/div>\n <p class=\"body-text\">\n A helically applied steel wire armour layer in a flexible cable is structurally equivalent to a coil spring.\n When twisted, armour wires experience bending and tensile\/compressive cyclic loading. Steel armour wire\n fatigue limit under reversed bending is approximately <strong>30\u201340% of tensile strength<\/strong>\n (150\u2013280 N\/mm\u00b2) at 10\u2077 cycles. In shuttle car torsional loading (\u00b1180\u00b0\/m at ~80,000 cycles\/year),\n cyclic bending stress on outer-radius armour wires <em>exceeds<\/em> this fatigue limit.\n <\/p>\n <p class=\"body-text\">\n Critically, when individual armour wires fracture, they remain as discrete wire ends within the armour layer.\n Under subsequent bending and torsion, these sharp wire ends penetrate radially <em>inward<\/em> into the EPR\n insulation \u2014 exactly the failure mode armour was intended to prevent. A correctly specified unarmoured UNE 22511\n cable with heavy-duty EM8 sheath is therefore <strong>more mechanically protective in shuttle car duty than an\n armoured cable of the same size<\/strong>.\n <\/p>\n <\/div>\n <div>\n <div class=\"sub-sec\">Minimum Bending Radius Penalty<\/div>\n <p class=\"body-text\">\n Steel wire armour sets a hard lower limit on minimum bending radius. For a 3\u00d795 mm\u00b2 cable (nominal O.D. \u2248 54 mm),\n IEC 60502-1 specifies a minimum bending radius for SWA cables of <strong>15\u00d7 O.D. = 810 mm<\/strong>.\n Cable reel drum diameters for shuttle car applications range 400\u2013700 mm \u2014 <em>below the minimum bending radius\n of the armoured cable<\/em>. A UNE 22512 armoured cable cannot physically be installed on standard shuttle car\n drums without fracturing armour wires on the first winding cycle.\n <\/p>\n <table class=\"spec-tbl\" style=\"margin-bottom:0;font-size:7.2pt;\">\n <thead><tr><th>Cable Type<\/th><th>Min. Bend Radius (95 mm\u00b2, \u00d854mm)<\/th><th>Shuttle Car Drum<\/th><\/tr><\/thead>\n <tbody>\n <tr><td>UNE 22511 (Feichun EPR)<\/td><td class=\"hi-green\">270\u2013324 mm (5\u20136\u00d7 O.D.)<\/td><td class=\"hi-green\">Compatible \u2014 all drums<\/td><\/tr>\n <tr><td>UNE 22512 (SWA)<\/td><td class=\"hi-red\">810 mm (15\u00d7 O.D.)<\/td><td class=\"hi-red\">Incompatible \u2014 armour fractures on first wind<\/td><\/tr>\n <\/tbody>\n <\/table>\n <\/div>\n <\/div>\n\n \n <div class=\"sec-head\">\n <span class=\"sec-num\">\u00a7 9<\/span>\n <span class=\"sec-title\">Outer Sheath: CPE EM8 vs. PCP EM7 \u2014 Material Science & Selection Logic<\/span>\n <\/div>\n\n <table class=\"spec-tbl copper-head\" style=\"font-size:7.2pt;\">\n <thead>\n <tr>\n <th style=\"width:34mm;\">Property \/ Test Method<\/th>\n <th style=\"width:42mm;\">PCP (Neoprene) \u2014 EM7<\/th>\n <th style=\"width:42mm;\">CPE (Chlorinated PE) \u2014 EM8<\/th>\n <th>Selection Guidance<\/th>\n <\/tr>\n <\/thead>\n <tbody>\n <tr><td>Shore A hardness<\/td><td class=\"mono\">60\u201372<\/td><td class=\"mono\">68\u201378<\/td><td>CPE harder \u2192 better abrasion; PCP softer \u2192 better cold flexibility<\/td><\/tr>\n <tr><td>Tensile strength (IEC 60811-1-1)<\/td><td class=\"mono\">\u226510 N\/mm\u00b2<\/td><td class=\"hi-green\">12\u201314 N\/mm\u00b2 (Feichun EM8)<\/td><td>Feichun CPE EM8 exceeds minimum by 20\u201340%<\/td><\/tr>\n <tr><td>Abrasion resistance (DIN 53516)<\/td><td class=\"mono\">80\u2013110 mm\u00b3 vol. loss<\/td><td class=\"hi-green\">55\u201380 mm\u00b3 (25\u201335% improvement)<\/td><td>CPE preferred for drag over sandstone\/igneous rock floors<\/td><\/tr>\n <tr><td>Tear resistance (IEC 60811-1-1)<\/td><td class=\"mono\">\u22658 N\/mm<\/td><td class=\"hi-green\">10\u201312 N\/mm (Feichun EM8)<\/td><td>Resists sheath splitting when sharp rock catches surface nick under tension<\/td><\/tr>\n <tr><td>Oil resistance (IRM 902, 7d\/70\u00b0C)<\/td><td class=\"hi-green\">Excellent \u2014 vol. swell <10%<\/td><td class=\"mono\">Very good \u2014 vol. swell 10\u201318%<\/td><td>PCP preferred near hydraulic power units with known leakage history<\/td><\/tr>\n <tr><td>Low-temperature flexibility<\/td><td class=\"mono\">Functional to \u221235\u00b0C<\/td><td class=\"hi-green\">Functional to \u221240\u00b0C; no cracking on mandrel bend<\/td><td>CPE preferred for surface-to-underground transitions in cold-climate mines<\/td><\/tr>\n <tr><td>Acid\/mine water resistance<\/td><td class=\"mono\">Good \u2014 pH \u22653<\/td><td class=\"hi-green\">Excellent \u2014 tested to pH \u22651.5<\/td><td>CPE preferred for sulfide ore mines with acidic drainage water (pH 2\u20134)<\/td><\/tr>\n <tr><td>Flame retardancy<\/td><td class=\"hi-green\">Passes UNE-EN 50265-2-2<\/td><td class=\"hi-green\">Passes UNE-EN 50265-2-2<\/td><td>Both self-extinguishing via inherent chlorine content; no halogen FR additives required<\/td><\/tr>\n <tr><td>Acid gas generation (IEC 60754-1)<\/td><td class=\"mono\">\u22640.5% HCl equiv.<\/td><td class=\"mono\">\u22640.5% HCl equiv.<\/td><td>Both comply; Feichun tests per production batch and provides certificate per drum<\/td><\/tr>\n <tr><td>Relative cost index<\/td><td class=\"mono\">1.0\u00d7 (reference)<\/td><td class=\"hi-green\">0.83\u20130.90\u00d7 (less expensive)<\/td><td>CPE is both technically superior on most mechanical parameters <em>and<\/em> less expensive<\/td><\/tr>\n <\/tbody>\n <\/table>\n\n <div class=\"callout navy-c\">\n <span class=\"callout-icon\">\u2139\ufe0f<\/span>\n <div>\n <div class=\"callout-head\">Feichun Default & Optional Sheath Specification<\/div>\n <div class=\"callout-body\">\n Feichun’s standard UNE 22511 catalogue uses <strong>PCP (EM7)<\/strong> as the default outer sheath \u2014 matching\n the incumbent Nexans Eproneo Minas specification for direct drop-in replacement ordering.\n <strong>CPE (EM8)<\/strong> is available at zero or marginal premium and is the preferred option for:\n (a) coal mines with rock-floor or mixed rock\/coal floor galleries; (b) any sulfide ore mine with drainage\n water pH <4.5; (c) operations requiring cable function below \u221235\u00b0C. Specify “CPE sheath” in the order\n inquiry to Tech@feichuncables.com for confirmation and dimensional equivalence data.\n <\/div>\n <\/div>\n <\/div>\n\n <\/div>\n\n <div class=\"page-footer\">\n <div class=\"footer-gold-rule\"><\/div>\n <div class=\"footer-row\">\n <div class=\"footer-left\">Page 4\/6 \u00b7 FeiChun Special Cables Co., Ltd. \u00b7 www.feichuncables.com<\/div>\n <div class=\"footer-right\">FC-TDS-UNE22511-2026-EN01 \u00b7 Rev 1.0<\/div>\n <\/div>\n <\/div>\n\n<\/div>\n<\/div>\n\n\n\n<div class=\"page\">\n<div class=\"page-inner\">\n\n <div class=\"page-cont-header\">\n <div class=\"cont-brand\">FEICHUN SPECIAL CABLES<\/div>\n <div class=\"cont-product\">UNE 22511 \u2014 Flexible Unarmoured Mining Drag Cable, 1.8\/3 kV<\/div>\n <div class=\"cont-doc\">FC-TDS-UNE22511-2026-EN01 \u00b7 Page 5\/6<\/div>\n <\/div>\n\n <div class=\"body-pad\" style=\"padding-bottom:16mm;\">\n\n <div class=\"sec-head\" style=\"margin-top:4mm;\">\n <span class=\"sec-num\">\u00a7 10<\/span>\n <span class=\"sec-title\">Mechanical Endurance \u2014 Test Protocol & Qualification Targets<\/span>\n <\/div>\n\n <table class=\"spec-tbl\">\n <thead>\n <tr>\n <th>Test Protocol<\/th>\n <th style=\"width:40mm;\">UNE 22511 Minimum<\/th>\n <th style=\"width:42mm;\">Feichun Qualification Target<\/th>\n <th>Acceptance Criteria<\/th>\n <\/tr>\n <\/thead>\n <tbody>\n <tr>\n <td>Torsional endurance<br><span style=\"font-size:6.5pt;color:var(--grey);\">IEC 60811-503<\/span><\/td>\n <td class=\"mono\">\u00b1180\u00b0\/m \u00d7 10,000 cycles<\/td>\n <td class=\"hi-green\">\u00b1180\u00b0\/m \u00d7 100,000 cycles (10\u00d7 standard)<\/td>\n <td style=\"font-size:7.2pt;\">No sheath cracking; conductor \u0394R \u22641%; IR \u2265100 M\u03a9\u00b7km; no delamination at 5 cross-section inspection points<\/td>\n <\/tr>\n <tr>\n <td>Tensile cycle endurance<\/td>\n <td class=\"mono\">Not specified in UNE 22511<\/td>\n <td class=\"hi-green\">50,000 cycles @ 30% rated tensile load<\/td>\n <td style=\"font-size:7.2pt;\">No conductor migration relative to sheath; sheath elongation retention \u226580%; no cracking at cable-connector boot transition<\/td>\n <\/tr>\n <tr>\n <td>Combined bending-torsion<br><span style=\"font-size:6.5pt;color:var(--grey);\">Proprietary shuttle car simulation<\/span><\/td>\n <td class=\"mono\">Not required by standard<\/td>\n <td class=\"hi-green\">500,000 cycles @ 6\u00d7 O.D. bending + \u00b190\u00b0 torsion simultaneously<\/td>\n <td style=\"font-size:7.2pt;\">All torsional criteria PLUS: no interlaminar delamination between insulation and sheath; conductor cross-section eccentricity <3%<\/td>\n <\/tr>\n <tr>\n <td>Ground contact abrasion<br><span style=\"font-size:6.5pt;color:var(--grey);\">DIN 53516 on sheath sample<\/span><\/td>\n <td class=\"mono\">Not specified as acceptance criterion in UNE 22511<\/td>\n <td class=\"hi-green\">CPE EM8: <80 mm\u00b3 \/ PCP EM7: <110 mm\u00b3<\/td>\n <td style=\"font-size:7.2pt;\">Correlates to minimum 18-month sheath life in continuous miner drag over rock floor at 2 m\/min advance rate<\/td>\n <\/tr>\n <\/tbody>\n <\/table>\n\n <div class=\"callout amber-c\">\n <span class=\"callout-icon\">\u2699\ufe0f<\/span>\n <div>\n <div class=\"callout-head\">Why 500,000 Combined Cycles Is the Critical Qualification Gate<\/div>\n <div class=\"callout-body\">\n A shuttle car on a 200 m panel at 40 round trips\/hour \u00d7 2,000 hr\/year accumulates ~80,000 combined\n bending-torsion events at the cable reel anchor per year. Feichun’s 500,000-cycle combined test validates\n a cable life equivalent to <strong>6.25 years<\/strong> of intensive shuttle car service \u2014 comfortably\n exceeding the 3\u20134 year replacement interval common in Chilean and Spanish mining maintenance programs.\n Torsional-only testing at 10,000 cycles (UNE 22511 minimum) cannot reveal cumulative damage mechanisms\n that only manifest when bending and torsion are simultaneously applied.\n <\/div>\n <\/div>\n <\/div>\n\n \n <div class=\"sec-head\">\n <span class=\"sec-num\">\u00a7 11<\/span>\n <span class=\"sec-title\">Feichun vs. Nexans Eproneo Minas \u2014 Drop-in Replacement Benchmarking<\/span>\n <\/div>\n\n <p class=\"body-text\">\n Nexans Eproneo Minas is the dominant UNE 22511 reference cable installed in Spanish and Latin American underground\n mining operations. The following parameter-by-parameter comparison provides procurement engineers with the complete\n technical validation basis for evaluating Feichun as a drop-in replacement supplier.\n <\/p>\n\n <table class=\"spec-tbl green-head\" style=\"font-size:7.3pt;\">\n <thead>\n <tr>\n <th style=\"width:44mm;\">Technical Parameter<\/th>\n <th style=\"width:44mm;\">Nexans Eproneo Minas<\/th>\n <th style=\"width:44mm;\">Feichun UNE 22511<\/th>\n <th style=\"width:14mm;text-align:center;\">Status<\/th>\n <\/tr>\n <\/thead>\n <tbody>\n <tr><td>Standard compliance<\/td><td>UNE 22511, IEC 60502-1<\/td><td>UNE 22511, IEC 60502-1; AENOR 3rd-party type test<\/td><td class=\"hi-green\" style=\"text-align:center;\">\u2705 Equiv.<\/td><\/tr>\n <tr><td>Voltage rating<\/td><td>1.8\/3 kV<\/td><td>1.8\/3 kV (also 3.6\/6 kV on request)<\/td><td class=\"hi-green\" style=\"text-align:center;\">\u2705 Equiv.+<\/td><\/tr>\n <tr><td>Conductor class \/ wire diameter<\/td><td>IEC 60228 Class 5, tinned Cu<\/td><td class=\"hi-green\">Class 5, tinned Cu; wire \u2205 \u2264 0.25 mm for \u226550 mm\u00b2<\/td><td class=\"hi-green\" style=\"text-align:center;\">\u2705 Superior<\/td><\/tr>\n <tr><td>Insulation<\/td><td>EPR compound EM5, 90\u00b0C<\/td><td>EPR compound EM5, 90\u00b0C cont., 250\u00b0C SC<\/td><td class=\"hi-green\" style=\"text-align:center;\">\u2705 Equiv.<\/td><\/tr>\n <tr><td>Earth configuration<\/td><td>3\u00d7S1 + 3\u00d7S2 symmetric<\/td><td>3\u00d7S1 + 3\u00d7S2 symmetric (identical geometry)<\/td><td class=\"hi-green\" style=\"text-align:center;\">\u2705 Identical<\/td><\/tr>\n <tr><td>Outer sheath<\/td><td>PCP (Neoprene) EM7<\/td><td>PCP EM7 (default) or CPE EM8 (option)<\/td><td class=\"hi-green\" style=\"text-align:center;\">\u2705 Equiv.+<\/td><\/tr>\n <tr><td>Flame retardancy<\/td><td>UNE-EN 50265-2-2<\/td><td>UNE-EN 50265-2-2, 3rd-party certified<\/td><td class=\"hi-green\" style=\"text-align:center;\">\u2705 Equiv.<\/td><\/tr>\n <tr><td>Acid gas (IEC 60754-1)<\/td><td>\u22640.5% HCl equiv.<\/td><td class=\"hi-green\">\u22640.5% HCl equiv., batch-tested per drum<\/td><td class=\"hi-green\" style=\"text-align:center;\">\u2705 Superior<\/td><\/tr>\n <tr><td>Smoke density (IEC 61034-2)<\/td><td>Optical density \u226460%<\/td><td>Optical density \u226460%, type-tested<\/td><td class=\"hi-green\" style=\"text-align:center;\">\u2705 Equiv.<\/td><\/tr>\n <tr><td>O.D. tolerance<\/td><td>\u00b15% of nominal<\/td><td>\u00b15% nominal; dimensional report per drum<\/td><td class=\"hi-green\" style=\"text-align:center;\">\u2705 Drop-in<\/td><\/tr>\n <tr><td>Cross-section range<\/td><td>16\u2013185 mm\u00b2 (standard)<\/td><td class=\"hi-green\">16\u2013240 mm\u00b2 (extended)<\/td><td class=\"hi-green\" style=\"text-align:center;\">\u2705 Wider<\/td><\/tr>\n <tr><td>Lead time<\/td><td>8\u201316 weeks (EU)<\/td><td class=\"hi-green\">4\u20138 weeks (Hefei, China)<\/td><td class=\"hi-green\" style=\"text-align:center;\">\u2705 Faster<\/td><\/tr>\n <tr><td>Unit price (ex-works estimate)<\/td><td>Index 1.0\u00d7<\/td><td class=\"hi-green\" style=\"font-weight:700;\">0.55\u20130.70\u00d7 (30\u201345% lower)<\/td><td class=\"hi-green\" style=\"text-align:center;\">\u2705 Major<\/td><\/tr>\n <\/tbody>\n <\/table>\n\n <div class=\"callout green-c\">\n <span class=\"callout-icon\">\u2714<\/span>\n <div>\n <div class=\"callout-head\">Drop-in Replacement Validation \u2014 Three Checks Before Ordering<\/div>\n <div class=\"callout-body\">\n Verify three physical parameters against the existing incumbent cable: <strong>(1) Overall outer diameter<\/strong> \u2014\n affects reel drum layer capacity and sheave groove radius; Feichun provides an O.D. cross-reference table on request.\n <strong>(2) Minimum bending radius on the cable reel drum nameplate<\/strong> \u2014 Feichun guarantees \u22646\u00d7 O.D. for all\n UNE 22511 production. <strong>(3) Connector crimp barrel dimensions<\/strong> \u2014 Feichun conductors use standard IEC\n 60309 crimp dimensions compatible with MARECHAL, ABB, SOURIAU, and Clifford & Snell mining connectors.\n Send the three parameters to <strong>Tech@feichuncables.com<\/strong> for a free drop-in replacement confirmation.\n <\/div>\n <\/div>\n <\/div>\n\n <\/div>\n\n <div class=\"page-footer\">\n <div class=\"footer-gold-rule\"><\/div>\n <div class=\"footer-row\">\n <div class=\"footer-left\">Page 5\/6 \u00b7 FeiChun Special Cables Co., Ltd. \u00b7 www.feichuncables.com<\/div>\n <div class=\"footer-right\">FC-TDS-UNE22511-2026-EN01 \u00b7 Rev 1.0<\/div>\n <\/div>\n <\/div>\n\n<\/div>\n<\/div>\n\n\n\n<div class=\"page\">\n<div class=\"page-inner\">\n\n <div class=\"page-cont-header\">\n <div class=\"cont-brand\">FEICHUN SPECIAL CABLES<\/div>\n <div class=\"cont-product\">UNE 22511 \u2014 Flexible Unarmoured Mining Drag Cable, 1.8\/3 kV<\/div>\n <div class=\"cont-doc\">FC-TDS-UNE22511-2026-EN01 \u00b7 Page 6\/6<\/div>\n <\/div>\n\n <div class=\"body-pad\" style=\"padding-bottom:16mm;\">\n\n <div class=\"sec-head\" style=\"margin-top:4mm;\">\n <span class=\"sec-num\">\u00a7 12<\/span>\n <span class=\"sec-title\">Total Cost of Ownership Analysis \u2014 5-Year Shuttle Car Application (4 cars)<\/span>\n <\/div>\n\n <p class=\"body-text\">\n Cable procurement decisions made on unit price alone are the most common and most expensive source of cable-related\n cost escalation in underground mining operations. The 5-year TCO is dominated not by purchase price but by\n <strong>replacement frequency<\/strong> and the <strong>production downtime cost<\/strong> of each replacement event.\n <\/p>\n\n <table class=\"spec-tbl red-head\" style=\"font-size:7.3pt;\">\n <thead>\n <tr>\n <th style=\"width:44mm;\">TCO Parameter<\/th>\n <th style=\"width:38mm;\">Generic IEC 60502-1<br>Industrial Cable<\/th>\n <th style=\"width:38mm;\">Competitor UNE 22511<br>(Class 5, coarse wire, PCP)<\/th>\n <th style=\"width:42mm;\">Feichun UNE 22511<br>(Class 5, \u22640.25mm wire, CPE EM8)<\/th>\n <\/tr>\n <\/thead>\n <tbody>\n <tr>\n <td>Indicative unit price (3\u00d795 mm\u00b2, 100 m)<\/td>\n <td class=\"mono\">USD 1,100 (reference)<\/td>\n <td class=\"mono\">USD 1,550<\/td>\n <td class=\"hi-green\">USD 1,350<\/td>\n <\/tr>\n <tr>\n <td>Expected cable life \u2014 shuttle car duty<\/td>\n <td class=\"hi-red\">3\u20136 months (not rated for torsion)<\/td>\n <td class=\"mono\">14\u201320 months<\/td>\n <td class=\"hi-green\">26\u201338 months<\/td>\n <\/tr>\n <tr>\n <td>Replacements per car over 5 years<\/td>\n <td class=\"hi-red\">10\u201320\u00d7<\/td>\n <td class=\"mono\">3\u20134\u00d7<\/td>\n <td class=\"hi-green\">1\u20132\u00d7<\/td>\n <\/tr>\n <tr>\n <td>Cable procurement cost (4 cars, 5 yr)<\/td>\n <td class=\"hi-red\">USD 88K\u2013176K<\/td>\n <td class=\"mono\">USD 18.6K\u201324.8K<\/td>\n <td class=\"hi-green\">USD 5.4K\u201310.8K<\/td>\n <\/tr>\n <tr>\n <td>Replacement downtime est.<br><span style=\"font-size:6.5pt;color:var(--grey);\">5 hr each \u00d7 USD 8,000\/hr mine stoppage<\/span><\/td>\n <td class=\"hi-red\">USD 1.6M\u20133.2M<\/td>\n <td class=\"mono\">USD 120K\u2013160K<\/td>\n <td class=\"hi-green\">USD 40K\u201380K<\/td>\n <\/tr>\n <tr style=\"background:#e8f0e8;\">\n <td style=\"font-weight:700;color:var(--navy);font-family:'IBM Plex Mono',monospace;font-size:7.5pt;\">5-Year TCO (4 cars: cable + downtime)<\/td>\n <td style=\"font-family:'IBM Plex Mono',monospace;font-size:7.5pt;font-weight:700;color:var(--red);\">USD 1.69M\u20133.38M<\/td>\n <td style=\"font-family:'IBM Plex Mono',monospace;font-size:7.5pt;font-weight:600;\">USD 139K\u2013185K<\/td>\n <td style=\"font-family:'IBM Plex Mono',monospace;font-size:7.5pt;font-weight:700;color:var(--green);\">USD 45K\u201391K<\/td>\n <\/tr>\n <tr>\n <td>TCO saving vs. generic cable (5 yr)<\/td>\n <td class=\"mono\">Baseline<\/td>\n <td class=\"hi-green\">~93% saving<\/td>\n <td class=\"hi-green\">~97% saving<\/td>\n <\/tr>\n <\/tbody>\n <\/table>\n\n <div class=\"callout navy-c\" style=\"margin-bottom:4mm;\">\n <span class=\"callout-icon\">\ud83d\udcca<\/span>\n <div>\n <div class=\"callout-head\">The Dominant TCO Finding<\/div>\n <div class=\"callout-body\">\n Cable purchase price accounts for <strong>less than 6% of 5-year TCO<\/strong> in a shuttle car application\n when correctly accounting for replacement downtime costs. The procurement decision with the highest OPEX\n leverage is not negotiating the lowest unit price \u2014 it is engineering the cable for maximum torsional fatigue\n life, which requires fine-wire Class 5 conductors, the correct earth architecture, and heavy-duty sheath\n compounds. Feichun’s UNE 22511 cables are priced 30\u201345% below European incumbents while meeting or exceeding\n their mechanical performance specifications.\n <\/div>\n <\/div>\n <\/div>\n\n \n <div class=\"sec-head\">\n <span class=\"sec-num\">\u00a7 13<\/span>\n <span class=\"sec-title\">Complete Documentation Package \u2014 Included with Every Feichun UNE 22511 Order<\/span>\n <\/div>\n\n <div class=\"two-col\" style=\"margin-bottom:4mm;\">\n <ol class=\"layer-list\">\n <li>\n <div>\n <div class=\"layer-name\">Third-party UNE 22511 Type Test Report<\/div>\n <div class=\"layer-desc\">AENOR-accredited laboratory; available in Spanish and English.<\/div>\n <\/div>\n <\/li>\n <li>\n <div>\n <div class=\"layer-name\">IEC 60754-1 Acid Gas Certificate<\/div>\n <div class=\"layer-desc\">Per sheath compound batch used in the production order; \u22640.5% HCl equivalent confirmed.<\/div>\n <\/div>\n <\/li>\n <li>\n <div>\n <div class=\"layer-name\">IEC 61034-2 Smoke Density Certificate<\/div>\n <div class=\"layer-desc\">Optical density \u226460% type-tested.<\/div>\n <\/div>\n <\/li>\n <li>\n <div>\n <div class=\"layer-name\">UNE-EN 50265-2-2 Flame Propagation Certificate<\/div>\n <div class=\"layer-desc\">20-min, 20 kW vertical burner test; both CPE and PCP grades qualified.<\/div>\n <\/div>\n <\/li>\n <\/ol>\n <ol class=\"layer-list\" style=\"counter-reset: lyr 4;\">\n <li>\n <div>\n <div class=\"layer-name\">IEC 60228 Class 5 Conductor Certificate<\/div>\n <div class=\"layer-desc\">Individual wire diameter (confirmed \u22640.25 mm for \u226550 mm\u00b2) and strand count per phase core.<\/div>\n <\/div>\n <\/li>\n <li>\n <div>\n <div class=\"layer-name\">Factory Test Record per Production Drum<\/div>\n <div class=\"layer-desc\">DC resistance, HV spark\/dielectric test, insulation resistance (\u2265100 M\u03a9\u00b7km), drum weight, net cable length.<\/div>\n <\/div>\n <\/li>\n <li>\n <div>\n <div class=\"layer-name\">Dimensional Inspection Report<\/div>\n <div class=\"layer-desc\">Nominal and measured O.D. per IEC 60502-1 tolerance (\u00b15%); sheath thickness; insulation wall thickness.<\/div>\n <\/div>\n <\/li>\n <li>\n <div>\n <div class=\"layer-name\">S2 Pilot Core Resistance Value per 100 m<\/div>\n <div class=\"layer-desc\">Specific to the production drum delivered; for ECMR relay trip threshold commissioning setting.<\/div>\n <\/div>\n <\/li>\n <\/ol>\n <\/div>\n\n \n <div class=\"two-col\">\n <div>\n <div class=\"prop-badge\">\u2605 FC-FLX\u2122 Conductor Technology<\/div>\n <p style=\"font-family:'Inter',sans-serif;font-size:7.5pt;color:var(--slate);line-height:1.65;margin-bottom:3mm;\">\n <strong style=\"color:var(--navy);\">FC-FLX\u2122<\/strong> \u2014 Feichun’s proprietary multi-layer segmented stranding\n technology. Individual wire diameters as fine as 0.10 mm (Class 6 special orders) and Feichun standard\n \u22640.25 mm for UNE 22511 production. Lay angles calculated to cancel torsional pre-load at the dominant\n drum rotation direction, extending mechanical fatigue life 3\u20135\u00d7 over conventional Class 5 designs.\n <\/p>\n <div class=\"prop-badge\" style=\"background:linear-gradient(90deg,var(--navy),var(--navy-mid));\">FC-CPE\u2122 EM8 Compound<\/div>\n <p style=\"font-family:'Inter',sans-serif;font-size:7.5pt;color:var(--slate);line-height:1.65;\">\n <strong style=\"color:var(--navy);\">FC-CPE\u2122<\/strong> \u2014 Feichun’s formulated CPE EM8 compound: Shore A 68\u201378,\n tensile 12\u201314 N\/mm\u00b2, abrasion loss <80 mm\u00b3 (DIN 53516), acid resistance to pH 1.5, low-temperature\n flexibility to \u221240\u00b0C. Peroxide cross-linked for superior heat stability over conventional CPE formulations.\n <\/p>\n <\/div>\n\n <div class=\"contact-block\">\n <div class=\"contact-brand\">FeiChun Special Cables<\/div>\n <div class=\"contact-sub\">\u5b89\u5fbd\u98de\u7eaf\u7279\u79cd\u7535\u7f06\u6709\u9650\u516c\u53f8 \u00b7 Hefei, Anhui, P.R. China<\/div>\n <div class=\"contact-row\">\n <span class=\"c-icon\">\ud83d\udce7<\/span>\n <div class=\"c-info\">\n Technical enquiries: <a href=\"mailto:Tech@feichuncables.com\">Tech@feichuncables.com<\/a><br>\n Mining sector: <a href=\"mailto:mining@feichuncables.com\">mining@feichuncables.com<\/a>\n <\/div>\n <\/div>\n <div class=\"contact-row\">\n <span class=\"c-icon\">\ud83d\udcac<\/span>\n <div class=\"c-info\">\n WhatsApp \/ WeChat \u00b7 <strong>+86 138 5512 3218<\/strong>\n <\/div>\n <\/div>\n <div class=\"contact-row\">\n <span class=\"c-icon\">\ud83c\udf10<\/span>\n <div class=\"c-info\"><a href=\"http:\/\/www.feichuncables.com\">www.feichuncables.com<\/a><\/div>\n <\/div>\n <div class=\"c-note\">\n Prices are subject to LME copper market fluctuation and may be revised accordingly.\n All technical data based on Feichun’s standard production specification.\n Contact us for application-specific engineering review and quotation.\n <\/div>\n <\/div>\n <\/div>\n\n <div class=\"ip-notice\">\n <strong>\u2605 FEICHUN PROPRIETARY \u2014 INTELLECTUAL PROPERTY NOTICE<\/strong><br>\n This document and the technical specifications contained herein are the proprietary property of Anhui FeiChun\n Special Cable Co., Ltd. Protected under Chinese Intellectual Property Law (Copyright Law 2021) and applicable\n international intellectual property conventions. Reproduction, distribution, or commercial use without written\n authorisation from FeiChun Cables is strictly prohibited.\n Document reference: <strong>FC-TDS-UNE22511-2026-EN01<\/strong>.\n <\/div>\n\n <\/div>\n\n <div class=\"page-footer\">\n <div class=\"footer-gold-rule\"><\/div>\n <div class=\"footer-row\">\n <div class=\"footer-left\">Page 6\/6 \u00b7 \u00a9 2026 FeiChun Special Cables Co., Ltd. All rights reserved.<\/div>\n <div class=\"footer-right\">FC-TDS-UNE22511-2026-EN01 \u00b7 Rev 1.0 \u00b7 May 2026<\/div>\n <\/div>\n <\/div>\n\n<\/div>\n<\/div>\n\n<\/body>\n<\/html>\n\n\n\n<div data-wp-interactive=\"core\/file\" class=\"wp-block-file\"><object data-wp-bind--hidden=\"!state.hasPdfPreview\" hidden class=\"wp-block-file__embed\" data=\"https:\/\/feichuncables.com\/blog\/wp-content\/uploads\/UNE-22511-\u2014-Flexible-Unarmoured-Mining-Drag-Cable-1.8_3-kV-_-FeiChun-Special-Cables.pdf\" type=\"application\/pdf\" style=\"width:100%;height:600px\" aria-label=\"\u5d4c\u5165 UNE 22511 \u2014 Flexible Unarmoured Mining Drag Cable 1.8_3 kV _ FeiChun Special Cables\"><\/object><a id=\"wp-block-file--media-ff73f301-5dc4-4333-8270-d43f3e32d204\" href=\"https:\/\/feichuncables.com\/blog\/wp-content\/uploads\/UNE-22511-\u2014-Flexible-Unarmoured-Mining-Drag-Cable-1.8_3-kV-_-FeiChun-Special-Cables.pdf\">UNE 22511 \u2014 Flexible Unarmoured Mining Drag Cable 1.8_3 kV _ FeiChun Special Cables<\/a><a href=\"https:\/\/feichuncables.com\/blog\/wp-content\/uploads\/UNE-22511-\u2014-Flexible-Unarmoured-Mining-Drag-Cable-1.8_3-kV-_-FeiChun-Special-Cables.pdf\" class=\"wp-block-file__button wp-element-button\" download aria-describedby=\"wp-block-file--media-ff73f301-5dc4-4333-8270-d43f3e32d204\">\u4e0b\u8f7d<\/a><\/div>\n","protected":false},"excerpt":{"rendered":"UNE 22511, published and maintained by AENOR (Asociaci\u00f3n Espa\u00f1ola de Normalizaci\u00f3n y Certificaci\u00f3n), is the definitive Spanish standard for heavy-duty power cables connecting underground mobile mining equipment to fixed electrical distribution networks. Operating as a specialized overlay on IEC 60502-1, it extends that base standard’s electrical requirements with stringent mechanical, safety, and flame-retardancy requirements specific to enclosed underground environments. Despite its Spanish origin, UNE 22511 enjoys adoption across the major Spanish-speaking mining economies: Chile, Peru, Colombia, Bolivia, and Mexico, where AENOR-certified cables are accepted by national mining safety regulators as the primary qualification pathway for underground mobile equipment power supply cables.","protected":false},"author":1,"featured_media":13679,"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":[66,97,7],"tags":[59127,59136,53499,55162,59098,59123,59130,59108,59115,59122,59128,35024,59147,59121,21000,59134,59138,59144,59146,59152,59135,59118,28491,59150,59145,59106,59120,31555,53595,59117,59116,4342,59105,59126,145,59153,4491,59149,18252,53911,59124,4813,59143,59096,173,417,59140,59133,59129,59141,36863,59148,21702,56454,59094,59104,59142,59109,59139,59107,22863,20978,59114,59101,59102,53222,54074,35158,59113,59132,59137,53374,4590,11530,54873,52117,59151,11582,59092,59131,33166,59125],"class_list":["post-13674","post","type-post","status-publish","format-standard","has-post-thumbnail","category-common-problems-encountered-in-cable-applications","category-lszh-low-smoke-zero-halogen-flexible-cable","category-mining-trailing-cable","tag-180-m","tag-0-5-hcl-equivalent","tag-000-cycles","tag-1-8-3-kv","tag-3xs13xs2-symmetric-earth","tag-59123","tag-abb","tag-abrasion-resistance-din-53516","tag-acid-mine-water-resistance","tag-aenor-type-test","tag-bending-radius-6xo-d","tag-cable-reel","tag-carros-lanzadera","tag-chile-mining-cable","tag-chlorinated-polyethylene","tag-class-5-coarse-wire","tag-class-6-extreme-duty","tag-clifford-snell","tag-coal-shearer-rozadora","tag-cold-flexibility-25c","tag-colombia-mining-cable","tag-combined-bending-torsion-fatigue","tag-continuous-miner","tag-continuous-miner-drag-cable","tag-cpe-em8","tag-cpe-em8-sheath","tag-decreto-1886-2015","tag-din-53516","tag-drop-in-replacement","tag-ds-023-2017-em","tag-ds-132-2004","tag-earth-continuity-monitoring","tag-ecmr","tag-em5","tag-epr-insulation","tag-fc-flx-conductor-technology","tag-feichun-cable","tag-feichun-une-22511","tag-fine-wire-stranding","tag-flame-retardancy","tag-flexible-unarmoured-mining-drag-cable","tag-iec-60228-class-5","tag-iec-60309-crimp-dimensions","tag-iec-60332-2-2","tag-iec-60502-1","tag-iec-60754-1","tag-iec-60811-503","tag-lay-pitch-ratio-121-to-181","tag-low-temperature-flexibility-40c-2","tag-marechal","tag-mining-electrical-protection","tag-mining-opex","tag-mobile-equipment","tag-neoprene","tag-nexans-eproneo-minas","tag-no-metallic-armour","tag-nom-023-stps-2012","tag-oil-resistance-irm-902","tag-pcp-em7","tag-pcp-em7-sheath","tag-peru-mining-cable","tag-polychloroprene","tag-rd-150-1996","tag-s1-main-earth","tag-s2-pilot-core","tag-sernageomin","tag-shore-a-hardness","tag-shuttle-car","tag-smoke-density-iec-61034-2","tag-souriau","tag-tambores-de-cable","tag-tco","tag-tear-resistance","tag-tinned-copper","tag-torsional-fatigue","tag-total-cost-of-ownership","tag-tread-over-compression-set","tag-underground-mining","tag-une-22511","tag-une-en-50265-2-2","tag-water-tree-resistance","tag-wire-diameter-0-25-mm","cs-entry"],"_links":{"self":[{"href":"https:\/\/feichuncables.com\/blog\/wp-json\/wp\/v2\/posts\/13674","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=13674"}],"version-history":[{"count":3,"href":"https:\/\/feichuncables.com\/blog\/wp-json\/wp\/v2\/posts\/13674\/revisions"}],"predecessor-version":[{"id":13695,"href":"https:\/\/feichuncables.com\/blog\/wp-json\/wp\/v2\/posts\/13674\/revisions\/13695"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/feichuncables.com\/blog\/wp-json\/wp\/v2\/media\/13679"}],"wp:attachment":[{"href":"https:\/\/feichuncables.com\/blog\/wp-json\/wp\/v2\/media?parent=13674"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/feichuncables.com\/blog\/wp-json\/wp\/v2\/categories?post=13674"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/feichuncables.com\/blog\/wp-json\/wp\/v2\/tags?post=13674"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}

{"id":13674,"date":"2026-05-19T10:02:28","date_gmt":"2026-05-19T02:02:28","guid":{"rendered":"https:\/\/feichuncables.com\/blog\/?p=13674"},"modified":"2026-05-19T10:04:04","modified_gmt":"2026-05-19T02:04:04","slug":"une-22511-2","status":"publish","type":"post","link":"https:\/\/feichuncables.com\/blog\/une-22511-2\/","title":{"rendered":"UNE 22511"},"content":{"rendered":"\n

Cables flexibles para miner\u00eda subterr\u00e1nea con tensiones de 1,8\/3 kV
con aislamiento de caucho, sin armadura<\/p>\n\n\n\n