NTSCGEWOEU(N)TSCGEWOEU3.6/6–12/20 kVPROTOLON(SMK)Class 5 / FSEPR 3GI3PCP / 5GM5
Feichun NTSCGEWOEU — high-flexibility medium-voltage cable for mines, port cranes and reel systems
Engineering guidance for the (N)TSCGEWOEU family: power cable for trailing, reeling, dragline, festoon and high-dynamic systems exposed simultaneously to medium-voltage electric stress, abrasion, tensile load, multi-plane bending, roller churning, torsion, oil, UV and low temperature.
Voltage family
3.6/6–12/20 kV
SMK reference: 1.8/3–12/20 kV
Current-carrying conductors
Class 5 / FS
Fine-stranded tinned-copper construction
Mechanical architecture
25–30 N/mm²
Depends on the base or SMK branch
Thermal limit
90 / 250°C
Conductor / short circuit
Contents
- Application scope and source hierarchy
- What a port or mining engineer must consider
- Application motion architecture
- Family branch map
- Layered construction
- SVG cross-section
- Failure-resistance physics
- Standards and certification dossier
- Electrical parameters
- Complete Feichun base matrix
- Reeling matrix Feichun
- SMK high/extreme reference matrix
- Energy + fibre data branch
- Variant comparison
- Calculations and sizing
- Selection algorithm
- Installation and reel
- Testing and acceptance
- FMEA: typical errors
- Sources and contacts
1. Application scope and source hierarchy
NTSCGEWOEU must be treated as an engineering family rather than one fixed cable. The published Feichun documents separately cover the base mining specification, reeling execution, high/extreme PROTOLON(SMK), reinforced PROTOLON(SB), water-duty PROTOLON(ST) and the LWL branch with optical fibres. The parameters are therefore retained with their scope; a value from one branch is not automatically transferred to another.
Primary Feichun mining specification
7 pages: 3×35+2×16+16 and 3×95+2×25+16, EPR/NBR layers, PE, pilot, 3.6/6 kV, physical and electrical tables, and mechanical limits.
Open the original Feichun specification
7 pages: 3×35+2×16+16 and 3×95+2×25+16, EPR/NBR layers, PE, pilot, 3.6/6 kV, physical and electrical tables, and mechanical limits.
Open the original Feichun specification
Feichun reeling specification
5 pages: 3.6/6 kV, complete Dmin/Dmax, mass, tensile load, R20, capacitance, inductance, current and Isc tables, including special PE/pilot constructions.
Open the Feichun reeling specification
5 pages: 3.6/6 kV, complete Dmin/Dmax, mass, tensile load, R20, capacitance, inductance, current and Isc tables, including special PE/pilot constructions.
Open the Feichun reeling specification
PROTOLON(SMK) high/extreme
7 pages: 1.8/3–12/20 kV, Class FS tinned copper, ±25°/m, static/dynamic tensile load, PROTOFIRM Sandwich, temperature limits and reference matrix.
Open the Feichun SMK specification
7 pages: 1.8/3–12/20 kV, Class FS tinned copper, ±25°/m, static/dynamic tensile load, PROTOFIRM Sandwich, temperature limits and reference matrix.
Open the Feichun SMK specification
Independent cross-check
Official 17-page Prysmian PDF with the same MV reeling-cable fields: conductor/PE diameter, Dmin/Dmax, Rfree, mass, static/dynamic tensile load, current and short-circuit current.
Open the official round MV PDF
Official 17-page Prysmian PDF with the same MV reeling-cable fields: conductor/PE diameter, Dmin/Dmax, Rfree, mass, static/dynamic tensile load, current and short-circuit current.
Open the official round MV PDF
Data status: the matrices are provided for preliminary engineering comparison and technical SEO navigation. Before ordering, confirm the exact voltage, cross-section, variant suffix, compound, length, reel, accessories, certificates and current batch.
2. What a port or mining engineer must consider
Mechanical kinematics
Travel speed, acceleration, number of reversals, roller bending, churning, S-type changes and possible torsion govern service life more strongly than nominal voltage alone.
Travel speed, acceleration, number of reversals, roller bending, churning, S-type changes and possible torsion govern service life more strongly than nominal voltage alone.
Travel-path geometry
Drag chain, festoon trolley, ground trailing and reel operation create different combinations of radius, lateral pressure, tensile load and torsion. The same Dmax does not make the systems interchangeable.
Drag chain, festoon trolley, ground trailing and reel operation create different combinations of radius, lateral pressure, tensile load and torsion. The same Dmax does not make the systems interchangeable.
Electrical duty
Current capacity depends on temperature, surface installation, number of reel layers and grouping. Long runs require review of R20, capacitance, inductance, voltage drop and charging current.
Current capacity depends on temperature, surface installation, number of reel layers and grouping. Long runs require review of R20, capacitance, inductance, voltage drop and charging current.
Certification scope
For ports, mines, EAEU markets and Ex zones, verify not only the cable but also the gland, termination, connector, joint, earthing, machine and site documentation.
For ports, mines, EAEU markets and Ex zones, verify not only the cable but also the gland, termination, connector, joint, earthing, machine and site documentation.
3. Application motion architecture
For port-engineering searches, the useful terms are not only “mining cable” and “medium-voltage cable”, but also ship-to-shore crane cable, STS/RTG/RMG reeling cable, festoon cable, dragline cable, cable drum, trailing cable, anti-torsion and abrasion-resistant sheath. NTSCGEWOEU addresses these engineering scenarios only after the correct family branch and mechanical duty have been selected.
4. Family branch map NTSCGEWOEU
| Family branch | Voltage | Architecture | Mechanics | Temperature / data | Practical application |
|---|---|---|---|---|---|
| NTSCGEWOEU base mining/trailing | 3.6/6; 6/10; 8.7/15; 12/20 kV | 3 phases + PE/pilot depending on construction | ±100°/m; 25 N/mm²; 6D fixed; 10D flexible | -35…+45°C mobile in the base 7-page specification | Open-pit machines, draglines, shovels, trailing/reeling |
| NTSCGEWOEU reeling / special configuration | Published 3.6/6 kV table | 3 phases + split PE or PE/pilot | 6D according to DIN VDE 0298-3; S-type 20D; 25 N/mm² depending on execution | -50…+80°C fixed; -50…+60°C fully flexible in a separate specification | Cold-climate logistics, reel and reverse winding |
| PROTOLON(SMK) (N)TSCGEWOEU | 1.8/3–12/20 kV | 3-core; PE split in the interstices | ±25°/m; 20 N/mm² static; up to 30 N/mm² dynamic | -50…+80°C fixed; -35…+80°C fully flexible | Fast STS, RTG/RMG, high/extreme reeling, rollers, churning |
| PROTOLON(SB) NTSCGEWOEU | 1.8/3–18/30 kV; special branch | 3-core split PE + reinforcing tape | ±100°/m; 15 N/mm² static; 6D/10D | -40…+80°C fixed; -20…+60°C flexible | Open-pit mining, reinforced trailing architecture |
| PROTOLON(ST) NTSCGEWOEU | 3–30 kV water branch | Water-duty execution; exact PE architecture per datasheet | ±25°/m; 15 N/mm²; 6D/10D in the source | -40…+80°C fixed; -25…+60°C moved | Dredgers, floating docks, pumps; up to 500 m — water variant only |
| PROTOLON(SMK)-LWL / (N)TSKCGEWOEU | Project-specific MV range | Energy + integrated optical fibres | Mechanical parameters must be verified against the specific LWL datasheet | 6/12/18/24 fibres; G50/125, G62.5/125, E9/125 | Cranes and machines with power + data in one cable |
How to read the designation: designations NTSCGEWOEU, (N)TSCGEWOEU, PROTOLON(SMK) (N)TSCGEWOEU and related suffixes appear in different technical and commercial documents. The purchase specification must use the complete designation of the exact execution rather than shortening it to the single term “NTSCGEWOEU”.
5. Layered construction: how Feichun combines flexibility, tensile strength and wear resistance
① Class 5 / FS tinned copper
Fine-stranded tinned copper reduces local deformation during cyclic bending and lowers the risk of surface corrosion in humid or saline environments.
Fine-stranded tinned copper reduces local deformation during cyclic bending and lowers the risk of surface corrosion in humid or saline environments.
② EPR 3GI3 insulation
The EPR compound combines dielectric strength, low-temperature flexibility and thermal-ageing resistance; it is not simply a PVC substitute for a moving MV machine.
The EPR compound combines dielectric strength, low-temperature flexibility and thermal-ageing resistance; it is not simply a PVC substitute for a moving MV machine.
③ Inner + outer field control
The semiconductive EPR inner layer and modified NBR Easy Strip outer layer establish a controlled radial electric gradient and simplify MV preparation.
The semiconductive EPR inner layer and modified NBR Easy Strip outer layer establish a controlled radial electric gradient and simplify MV preparation.
④ Split PE architecture
The protective earth conductor is placed in the interstices. Its cross-section, split arrangement and termination bonding must match the project fault-current design.
The protective earth conductor is placed in the interstices. Its cross-section, split arrangement and termination bonding must match the project fault-current design.
⑤ Central support / aramid
Where a conductive cradle with aramid rope is specified, the central support stabilizes circular geometry and limits ovalization during tensile loading and roller bending.
Where a conductive cradle with aramid rope is specified, the central support stabilizes circular geometry and limits ovalization during tensile loading and roller bending.
⑥ PROTOFIRM / rubber sheath system
In the SMK architecture, double-layer inner EPR, a vulcanized polyester anti-torsion braid and double-layer PCP outer sheath combine flexible response with abrasion and tear resistance.
In the SMK architecture, double-layer inner EPR, a vulcanized polyester anti-torsion braid and double-layer PCP outer sheath combine flexible response with abrasion and tear resistance.
| Layer / element | Primary risk | Engineering function | What to verify |
|---|---|---|---|
| Class 5 / FS tinned Cu | Cyclic bending fatigue and corrosion | Very fine-stranded tinned copper conductor; tinning provides additional surface protection in humid or marine environments | DIN EN/IEC 60228, VDE 0295; R20 resistance |
| EPR inner screen + EPR 3GI3 | Field non-uniformity and thermal ageing | The semiconductive layer equalizes the electric field; EPR provides dielectric and mechanical stability | AC test, insulation resistance, routine test |
| Modified NBR outer Easy Strip | Difficult MV preparation | A cold-strippable outer semiconductive layer reduces the risk of insulation damage during termination preparation | Termination procedure for the specific execution |
| Split PE in interstices | Fault current, asymmetry and bending | PE is distributed around the three phases to preserve symmetry and flexibility; the PE size must not be substituted arbitrarily | PE continuity, earth resistance, short-circuit design |
| Central cradle / aramid support | Ovalization and core displacement | Where specified, the element stabilizes circular geometry under tensile load, roller bending and torsion | Dmax, visual section, mechanical qualification |
| Inner sheath 5GM3 / EPR | Internal friction and core damage | Separates the cores from the external reinforcement and sheath system; in PROTOFIRM it also functions as a water-barrier layer | Compound and design drawing |
| Polyester anti-torsion braid | Torsion and relative interlayer movement | The vulcanized braid transfers mechanical load without local sheath shearing | Reversed bending and torsion test |
| PCP / special rubber outer sheath | Abrasion, tearing, oil, UV and ozone | A tough surface is combined with flexibility; the exact compound and class must be confirmed by the datasheet | IEC 60811-404, flame and weather documentation |
6. Professional SVG cross-section
Do not mix constructions: the presence of a pilot conductor, central cradle, aramid support, split PE, LWL element and exact sheath compound depends on the specific specification. The SVG shows the family’s functional architecture and does not replace the section drawing for a specific order.
7. Why this construction withstands severe mechanical duty
| Layer / element | Primary risk | Engineering function | What to verify |
|---|---|---|---|
| Class 5 / FS tinned Cu | Cyclic bending fatigue and corrosion | Very fine-stranded tinned copper conductor; tinning provides additional surface protection in humid or marine environments | DIN EN/IEC 60228, VDE 0295; R20 resistance |
| EPR inner screen + EPR 3GI3 | Field non-uniformity and thermal ageing | The semiconductive layer equalizes the electric field; EPR provides dielectric and mechanical stability | AC test, insulation resistance, routine test |
| Modified NBR outer Easy Strip | Difficult MV preparation | A cold-strippable outer semiconductive layer reduces the risk of insulation damage during termination preparation | Termination procedure for the specific execution |
| Split PE in interstices | Fault current, asymmetry and bending | PE is distributed around the three phases to preserve symmetry and flexibility; the PE size must not be substituted arbitrarily | PE continuity, earth resistance, short-circuit design |
| Central cradle / aramid support | Ovalization and core displacement | Where specified, the element stabilizes circular geometry under tensile load, roller bending and torsion | Dmax, visual section, mechanical qualification |
| Inner sheath 5GM3 / EPR | Internal friction and core damage | Separates the cores from the external reinforcement and sheath system; in PROTOFIRM it also functions as a water-barrier layer | Compound and design drawing |
| Polyester anti-torsion braid | Torsion and relative interlayer movement | The vulcanized braid transfers mechanical load without local sheath shearing | Reversed bending and torsion test |
| PCP / special rubber outer sheath | Abrasion, tearing, oil, UV and ozone | A tough surface is combined with flexibility; the exact compound and class must be confirmed by the datasheet | IEC 60811-404, flame and weather documentation |
The main engineering effect does not come from one “ultra-strong” material, but from distributing deformation across the layers. The fine-stranded conductor absorbs cyclic bending; EPR and semiconductive layers control the electric field; split PE preserves the protective function without turning the cable into a rigid monolith; inner sheath, braid and outer sheath separately manage internal friction, torsion and abrasion. This approach describes service life more accurately than an unsupported “heavy duty” marketing label.
8. Standards, certification and safety dossier
For international projects, Feichun positions its cable systems as Engineered for maximum safety in demanding environments. The stated conformity system includes ATEX, IECEx, VDE, CE, UKCA, EAC and Russian Fire Safety Certificate; the NTSCGEWOEU documentation also cites DIN VDE, IEC/DIN EN, GOST-R/-K/-B and fire documentation. This supports technical tenders for mining equipment, ship-to-shore cranes, RTG/RMG cranes and conveyor systems, where a cable failure can stop the entire machine.
| Standard / document | Engineering role | What it supports | Pre-delivery control |
|---|---|---|---|
| DIN VDE 0250-813 | Typical basis for medium-voltage trailing/reeling cable | Construction, application and project specification | Specify the exact voltage, construction and suffix |
| DIN EN/IEC 60228; VDE 0295 | Conductors and flexible Class 5 / FS conductor | Wire count/diameter, resistance and flexibility | Check R20 and the actual conductor construction |
| DIN VDE 0207 Part 20/21 | EPR insulation and rubber sheath compounds | Material requirements for insulation and sheath | Do not transfer a sheath class between family branches |
| DIN VDE 0298-3 / -4 | Bending radius, current capacity and installation logic | Bending, current capacity and correction factors | Tabulated current is tied to the installation conditions |
| IEC 60332-1-2 / EN 60332-1-2 | Vertical flame-propagation test | Fire test for a single vertical cable/wire | A flame test does not automatically equal a Russian fire-safety class |
| IEC 60811-404 | Mineral-oil immersion test | Test method for sheath compounds | Oil resistance does not mean compatibility with every chemical |
| CE / UKCA / EAC | Market and conformity dossier | Marking, declarations and scope of the specific product/market | Check the current batch document |
| GOST-R / GOST-K / GOST-B / Russian Fire Safety Certificate | Russian and regional project requirements | Datasheet, fire dossier and application scope | Check voltage, cross-section, batch and cable system |
| ATEX / IECEx | Equipment in potentially explosive atmospheres | Requirements for Ex equipment and the overall system | Confirm the cable/gland/equipment scope; do not overclaim on the basis of one sheath material |
Critical qualification: ATEX/IECEx, CE, UKCA, EAC and the Russian fire-safety document have a product and application scope. The presence of a standard name in a general description does not mean that every size, voltage, connector, gland and batch is automatically covered by one certificate. Before delivery, request the current certificate/dossier for the exact project cable system.
For additional normative support, consult: IEC 60228:2023 for conductors, IEC 60332-1-2:2025 for vertical flame propagation and IEC 60811-404:2012 for mineral-oil immersion. For Ex equipment, also consider the official description of ATEX Directive 2014/34/EU and do not confuse equipment certification with one material test of the cable sheath.
9. Family electrical parameters
| Rated Uo/U, kV | Max AC, kV | Max DC, kV | AC test, kV | Rated U, kV |
|---|---|---|---|---|
| 1.8/3 | 2.1/3.6 | 2.7/5.4 | 6 | 3 |
| 3.6/6 | 4.2/7.2 | 5.4/10.8 | 11 | 6 |
| 6/10 | 6.9/12 | 9/18 | 17 | 10 |
| 8.7/15 | 10.4/18 | 13.5/27 | 24 | 15 |
| 12/20 | 13.9/24 | 18/36 | 29 | 20 |
9.1. Published current derating during reeling
For the featured Feichun execution, current values are published for floor installation, free air and a sequence of 1–7 reel layers. This table is particularly useful for STS/RTG/RMG and mining reeling: it shows why selecting by one “nominal current” without considering the number of layers can cause overheating. The values apply to the source construction and its documented conditions; they are not universal factors for every NTSCGEWOEU variant.
| Phase cross-section, mm² | On floor, A | Free in air, A | Reel, 1 layer, A | 2 layers, A | 3 layers, A | 4 layers, A | 5 layers, A | 6 layers, A | 7 layers, A |
|---|---|---|---|---|---|---|---|---|---|
| 25 | 131 | 138 | 105 | 80 | 64 | 55 | 50 | 35 | 29 |
| 35 | 162 | 170 | 130 | 99 | 79 | 68 | 62 | 44 | 36 |
| 50 | 202 | 212 | 162 | 123 | 99 | 85 | 77 | 55 | 44 |
| 70 | 250 | 263 | 200 | 153 | 123 | 105 | 95 | 68 | 55 |
| 95 | 301 | 316 | 241 | 184 | 147 | 126 | 114 | 81 | 66 |
| 120 | 352 | 370 | 282 | 215 | 172 | 148 | 134 | 95 | 77 |
| 150 | 404 | 424 | 323 | 246 | 198 | 170 | 154 | 109 | 89 |
| 185 | 461 | 484 | 369 | 281 | 226 | 194 | 175 | 124 | 101 |
Thermal framework
In the published Feichun/Prysmian reference documents: maximum conductor temperature 90°C; maximum short-circuit conductor temperature 250°C. ambient limits differ between base, SMK, SB and ST.
In the published Feichun/Prysmian reference documents: maximum conductor temperature 90°C; maximum short-circuit conductor temperature 250°C. ambient limits differ between base, SMK, SB and ST.
Current carrying capacity
Tabulated values are normally tied to 30°C and a specific installation method, surface condition or reel-layer arrangement. Do not transfer the “on floor” current to multilayer reeling without derating.
Tabulated values are normally tied to 30°C and a specific installation method, surface condition or reel-layer arrangement. Do not transfer the “on floor” current to multilayer reeling without derating.
Field control
For MV termination, semiconductive-screen geometry, stripping length, EPR cleanliness and the correct connector are essential. A cold-strip outer screen is useful only when the instructions are followed.
For MV termination, semiconductive-screen geometry, stripping length, EPR cleanliness and the correct connector are essential. A cold-strip outer screen is useful only when the instructions are followed.
Capacitance / inductance
These values are needed for charging current, voltage drop, power factor and converter-fed/long-cable system behaviour; VFD and special data elements require a separate system review.
These values are needed for charging current, voltage drop, power factor and converter-fed/long-cable system behaviour; VFD and special data elements require a separate system review.
10. Complete Feichun base matrix: physical data
All rows from the 7-page Feichun NTSCGEWOEU Mining Cable specification are retained below. Configurations with a pilot conductor and split PE remain in the source notation.
NTSCGEWOEU base mining · 13 published constructions · physical dimensions
| Construction | Max conductor Ø, mm | Min cable Ø, mm | Max cable Ø, mm | Mass, kg/km |
|---|---|---|---|---|
| 3×16+2×10+1×10 | 5 | 41 | 45 | 2270 |
| 3×16+2×16+1×16 | 5 | 40.5 | 44.5 | 2469 |
| 3×25+2×16+1×16 | 6.2 | 43.5 | 47.5 | 2790 |
| 3×35+2×16+16 | 7.5 | 46.5 | 50 | 3280 |
| 3×50+2×16+1×16 | 9 | 49.5 | 54 | 3900 |
| 3×70+2×25+1×16 | 10.6 | 55 | 59.5 | 5020 |
| 3×95+2×25+16 | 12.9 | 60.3 | 66 | 5860 |
| 3×95+3×50/3 | 12.6 | 58.5 | 63 | 5800 |
| 3×120+2×35+1×16 | 14.8 | 65.5 | 70 | 7410 |
| 3×150+2×35+1×16 | 16 | 69.8 | 73.4 | 8456 |
| 3×185+2×50+1×16 | 17.7 | 72.7 | 77.2 | 9955 |
| 3×240+2×70+1×16 | 20.3 | 80.1 | 84.6 | 12618 |
| 3×300+2×95+1×16 | 31.3 | 84 | 89 | 15075 |
11. Complete Feichun base matrix: electrical performance
NTSCGEWOEU base mining · 13 published constructions · Fmax, C, L, R20 and current
| Construction | Fmax, N | C, nF/km | L, mH/km | R20 max, Ω/km | I, A |
|---|---|---|---|---|---|
| 3×16+2×10+1×10 | 1200 | 200 | 0.39 | 1.24 | 99 |
| 3×16+2×16+1×16 | 1200 | 200 | 0.39 | 1.24 | 99 |
| 3×25+2×16+1×16 | 1875 | 230 | 0.36 | 0.795 | 131 |
| 3×35+2×16+16 | 2625 | 260 | 0.34 | 0.565 | 162 |
| 3×50+2×16+1×16 | 3750 | 290 | 0.32 | 0.393 | 202 |
| 3×70+2×25+1×16 | 5250 | 340 | 0.3 | 0.277 | 250 |
| 3×95+2×25+16 | 7125 | 370 | 0.29 | 0.21 | 301 |
| 3×95+3×50/3 | 7125 | 370 | 0.29 | 0.21 | 301 |
| 3×120+2×35+1×16 | 9000 | 410 | 0.28 | 0.164 | 352 |
| 3×150+2×35+1×16 | 11250 | 440 | 0.27 | 0.132 | 404 |
| 3×185+2×50+1×16 | 13875 | 480 | 0.27 | 0.108 | 461 |
| 3×240+2×70+1×16 | 18000 | 540 | 0.26 | 0.0817 | 540 |
| 3×300+2×95+1×16 | 22500 | 780 | 0.24 | 0.0654 | 620 |
Meaning of the fields: Fmax is the maximum tensile force from the source table; C is nominal operating capacitance; L is operating self-inductance; R20 is conductor resistance at 20°C; I is current-carrying capacity under the source conditions. Short-circuit current was not published in this particular table and has not been derived.
12. Feichun reeling matrix: 3.6/6 kV and special PE/pilot designs
This separate table does not replace the 7-page base matrix: it represents another document revision/construction and adds Part number, tensile force, capacitance, inductance and short-circuit current. This is why two official documents can show close but non-identical Dmax and mass values.
NTSCGEWOEU reeling · 23 published rows · all reported fields
| Uo/U | Construction | Part number | Max conductor Ø, mm | Min Ø, mm | Max Ø, mm | Mass, kg/km | Max tensile force, N | R20, Ω/km | C, µF/km | L, mH/km | I, A | Isc, kA |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 3.6/6 | 3×35+3×25/3 | not published | 6.2 | 44.4 | 47.9 | 2750 | 1575 | 0.565 | 0.23 | 0.36 | 162 | 5 |
| 3.6/6 | 3×35+2×16+16 | 20076465 | 7.5 | 47.2 | 50.7 | 3225 | 1575 | 0.565 | 0.26 | 0.34 | 162 | 5 |
| 3.6/6 | 3×50+3×25/3 | not published | 9 | 50.3 | 54.8 | 3850 | 2250 | 0.393 | 0.29 | 0.32 | 202 | 7.2 |
| 3.6/6 | 3×70+3×35/3 | not published | 10.6 | 55.6 | 60.1 | 4900 | 3150 | 0.277 | 0.33 | 0.31 | 250 | 10 |
| 3.6/6 | 3×95+3×50/3 | not published | 12.6 | 59.9 | 64.4 | 5800 | 4275 | 0.21 | 0.37 | 0.29 | 301 | 13.6 |
| 3.6/6 | 3×120+3×70/3 | not published | 14.8 | 66.5 | 71 | 7250 | 5400 | 0.164 | 0.42 | 0.28 | 352 | 17.2 |
| 3.6/6 | 3×150+3×70/3 | not published | 16 | 68.9 | 73.4 | 8150 | 6750 | 0.132 | 0.45 | 0.27 | 404 | 21.5 |
| 3.6/6 | 3×185+3×95/3 | not published | 17.7 | 72.7 | 77.2 | 9600 | 8325 | 0.108 | 0.48 | 0.27 | 461 | 26.5 |
| 3.6/6 | 3×240+3×120/3 | not published | 20.3 | 80.1 | 84.6 | 12050 | 10800 | 0.0817 | 0.54 | 0.26 | 540 | 34.3 |
| 3.6/6 | 3×16+2×10+1×10 | 20095522 | 5 | 40.5 | 44.5 | 1923 | 720 | 1.24 | 0.2 | 0.39 | 99 | 2.3 |
| 3.6/6 | 3×16+3×16/3 | not published | 5 | 40.5 | 44.5 | 1923 | 720 | 1.24 | 0.2 | 0.39 | 99 | 2.3 |
| 3.6/6 | 3×16+2×16+16 | not published | 5 | 40.5 | 44.5 | 2469 | 720 | 1.24 | 0.2 | 0.39 | 99 | 2.3 |
| 3.6/6 | 3×25+3×16/3 | not published | 6.2 | 43.5 | 47.5 | 2432 | 1125 | 0.8 | 0.23 | 0.36 | 131 | 3.6 |
| 3.6/6 | 3×25+2×16+16 | 20092078 | 6.2 | 43.5 | 47.5 | 2886 | 1125 | 0.8 | 0.23 | 0.36 | 131 | 3.6 |
| 3.6/6 | 3×50+2×16+16 | 20114035 | 9 | 50.3 | 54.8 | 4108 | 2250 | 0.393 | 0.29 | 0.32 | 202 | 7.2 |
| 3.6/6 | 3×70+2×25+16 | 20076466 | 10.6 | 55.6 | 60.1 | 5171 | 3150 | 0.277 | 0.34 | 0.3 | 250 | 10 |
| 3.6/6 | 3×95+2×25+16 | not published | 12.6 | 59.9 | 64.4 | 6076 | 4275 | 0.21 | 0.37 | 0.29 | 301 | 13.6 |
| 3.6/6 | 3×120+2×35+16 | 20087396 | 14.8 | 66.5 | 71 | 6792 | 5400 | 0.164 | 0.41 | 0.28 | 352 | 17.2 |
| 3.6/6 | 3×150+2×35+16 | not published | 16 | 69.8 | 73.4 | 8456 | 6750 | 0.132 | 0.44 | 0.27 | 404 | 21.5 |
| 3.6/6 | 3×185+2×50+16 | not published | 17.7 | 72.7 | 77.2 | 9955 | 8325 | 0.108 | 0.48 | 0.27 | 461 | 26.5 |
| 3.6/6 | 3×240+2×70+16 | not published | 20.3 | 80.1 | 84.6 | 12618 | 10800 | 0.0817 | 0.54 | 0.26 | 540 | 34.3 |
| 3.6/6 | 3×300+3×150/3 | not published | 31.3 | 84 | 89 | 14142 | 13500 | 0.0654 | 0.78 | 0.24 | 620 | 42.9 |
| 3.6/6 | 3×300+2×95+16 | not published | 31.3 | 84 | 89 | 15075 | 13500 | 0.0654 | 0.78 | 0.24 | 620 | 42.9 |
Engineering boundary: if the project specifies “3×95+2×25+16”, confirm whether the base mining row (5860 kg/km; Dmax 66 mm) or the special reeling row (6076 kg/km; Dmax 64.4 mm) is applicable. These differences must not be averaged; one exact product datasheet must be selected.
13. PROTOLON(SMK) high/extreme: reference matrix for fast cranes and heavy reeling
The following table is retained as an SMK reference matrix with the fields of the official MV round PDF. Part number and MLFB are marked as source reference identifiers and are not Feichun order codes. Actual Feichun supply is governed by the current quotation/specification for the exact execution.
PROTOLON(SMK) (N)TSCGEWOEU · 1.8/3–12/20 kV · 52 reference rows
| Uo/U | Construction | Reference Part* | Reference MLFB* | Max conductor Ø, mm | Max PE Ø, mm | Min Ø, mm | Max Ø, mm | Rfree, mm | Mass, kg/km | Fstatic, N | Fdynamic, N | R20, Ω/km | I, A | Isc, kA |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1.8/3 | 3×25+3×25/3 | 20004456 | 5DK2101 | 7.1 | 4.2 | 34.3 | 37.3 | 373 | 2110 | 1500 | 2250 | 0.8 | 131 | 3.58 |
| 1.8/3 | 3×35+3×25/3 | not published | 5DK2102 | 8.3 | 4.2 | 43 | 46 | 460 | 3150 | 2100 | 3150 | 0.57 | 162 | 5.01 |
| 1.8/3 | 3×50+3×25/3 | 20143217 | 5DK2103 | 9.9 | 4.2 | 46.4 | 49.4 | 494 | 3840 | 3000 | 4500 | 0.39 | 202 | 7.15 |
| 1.8/3 | 3×70+3×35/3 | 20004457 | 5DK2104 | 11.8 | 5 | 45.9 | 48.9 | 489 | 4230 | 4200 | 6300 | 0.28 | 250 | 10.01 |
| 1.8/3 | 3×95+3×50/3 | 20004458 | 5DK2105 | 13.8 | 5.9 | 50.3 | 54.3 | 543 | 5440 | 5700 | 8550 | 0.21 | 301 | 13.59 |
| 1.8/3 | 3×120+3×70/3 | not published | 5DK2106 | 15.4 | 7 | 63.8 | 67.8 | 678 | 8010 | 7200 | 10800 | 0.16 | 352 | 17.16 |
| 1.8/3 | 3×150+3×70/3 | not published | 5DK2107 | 17.2 | 7 | 67.7 | 71.7 | 717 | 9240 | 9000 | 13500 | 0.13 | 404 | 21.45 |
| 1.8/3 | 3×185+3×95/3 | not published | 5DK2108 | 19 | 8 | 71.6 | 75.6 | 756 | 10750 | 11100 | 16650 | 0.11 | 461 | 26.46 |
| 1.8/3 | 3×240+3×120/3 | not published | 5DK2110 | 21.8 | 9 | 79.4 | 83.4 | 834 | 13640 | 14400 | 21600 | 0.08 | 540 | 34.32 |
| 1.8/3 | 3×300+3×150/3 | not published | 5DK2111 | 24.4 | 10 | 84.7 | 89.7 | 897 | 16230 | 18000 | 27000 | 0.07 | 620 | 42.9 |
| 3.6/6 | 3×25+3×25/3 | 20004476 | 5DK3101 | 7.1 | 4.2 | 35.5 | 38.5 | 385 | 2210 | 1500 | 2250 | 0.8 | 131 | 3.58 |
| 3.6/6 | 3×35+3×25/3 | 20004477 | 5DK3102 | 8.3 | 4.2 | 39 | 42 | 420 | 2720 | 2100 | 3150 | 0.57 | 162 | 5.01 |
| 3.6/6 | 3×50+3×25/3 | 20004478 | 5DK3103 | 9.9 | 4.2 | 42.4 | 45.4 | 454 | 3380 | 3000 | 4500 | 0.39 | 202 | 7.15 |
| 3.6/6 | 3×70+3×35/3 | 20004479 | 5DK3104 | 11.8 | 5 | 46.4 | 49.4 | 494 | 4310 | 4200 | 6300 | 0.28 | 250 | 10.01 |
| 3.6/6 | 3×95+3×50/3 | 20004480 | 5DK3105 | 13.8 | 5.9 | 51.4 | 55.5 | 555 | 5570 | 5700 | 8550 | 0.21 | 301 | 13.59 |
| 3.6/6 | 3×120+3×70/3 | 20024335 | 5DK3106 | 15.4 | 7 | 55 | 59 | 590 | 6700 | 7200 | 10800 | 0.16 | 352 | 17.16 |
| 3.6/6 | 3×150+3×70/3 | 20004481 | 5DK3107 | 17.2 | 7 | 58.8 | 62.8 | 628 | 7820 | 9000 | 13500 | 0.13 | 404 | 21.45 |
| 3.6/6 | 3×185+3×95/3 | 20006940 | 5DK3108 | 19 | 8 | 64 | 68 | 680 | 9530 | 11100 | 16650 | 0.11 | 461 | 26.46 |
| 3.6/6 | 3×240+3×120/3 | not published | 5DK3110 | 21.8 | 9 | 72.5 | 76.5 | 765 | 12120 | 14400 | 21600 | 0.08 | 540 | 34.32 |
| 3.6/6 | 3×300+3×150/3 | not published | 5DK3111 | 24.4 | 10 | 78.2 | 82.2 | 822 | 14580 | 18000 | 27000 | 0.07 | 620 | 42.9 |
| 6/10 | 3×25+3×25/3 | 20004539 | 5DK4061 | 7.1 | 4.2 | 37.8 | 40.8 | 408 | 2400 | 1500 | 2250 | 0.8 | 131 | 3.58 |
| 6/10 | 3×35+3×25/3 | 20001443 | 5DK4062 | 8.3 | 4.2 | 40.2 | 43.2 | 432 | 2830 | 2100 | 3150 | 0.57 | 162 | 5.01 |
| 6/10 | 3×35+3×35/3 | 20004545 | 5DK4072 | 8.3 | 5 | 40.2 | 43.2 | 432 | 2920 | 2100 | 3150 | 0.57 | 162 | 5.01 |
| 6/10 | 3×35+3×50/3 | 20008105 | 5DK4802 | 8.3 | 5.9 | 42.7 | 45.7 | 457 | 3280 | 2100 | 3150 | 0.57 | 162 | 5.01 |
| 6/10 | 3×50+3×25/3 | 20004540 | 5DK4063 | 9.9 | 4.2 | 43.7 | 46.7 | 467 | 3570 | 3000 | 4500 | 0.39 | 202 | 7.15 |
| 6/10 | 3×70+3×50/3 | 20004546 | 5DK4074 | 11.8 | 5.9 | 47.7 | 50.7 | 507 | 4570 | 4200 | 6300 | 0.28 | 250 | 10.01 |
| 6/10 | 3×95+3×50/3 | 20004541 | 5DK4065 | 13.8 | 5.9 | 52.8 | 56.8 | 568 | 5710 | 5700 | 8550 | 0.21 | 301 | 13.59 |
| 6/10 | 3×120+3×70/3 | 20004542 | 5DK4066 | 15.4 | 7 | 56.2 | 60.2 | 602 | 6840 | 7200 | 10800 | 0.16 | 352 | 17.16 |
| 6/10 | 3×150+3×70/3 | 20004543 | 5DK4067 | 17.2 | 7 | 61.5 | 65.5 | 655 | 8200 | 9000 | 13500 | 0.13 | 404 | 21.45 |
| 6/10 | 3×185+3×95/3 | 20004544 | 5DK4068 | 19 | 8 | 65.3 | 69.3 | 693 | 9690 | 11100 | 16650 | 0.11 | 461 | 26.46 |
| 6/10 | 3×240+3×120/3 | 20113369 | 5DK4070 | 21.8 | 9 | 73.8 | 77.8 | 778 | 12310 | 14400 | 21600 | 0.08 | 540 | 34.32 |
| 6/10 | 3×300+3×150/3 | 20154762 | 5DK4071 | 24.4 | 10 | 79.5 | 83.5 | 835 | 14780 | 18000 | 27000 | 0.07 | 620 | 42.9 |
| 8.7/15 | 3×25+3×25/3 | 20004658 | 5DK5061 | 7.1 | 4.2 | 41.1 | 44.1 | 441 | 2680 | 1500 | 2250 | 0.8 | 139 | 3.58 |
| 8.7/15 | 3×35+3×25/3 | 20004659 | 5DK5062 | 8.3 | 4.2 | 43.7 | 46.7 | 467 | 3150 | 2100 | 3150 | 0.57 | 172 | 5.01 |
| 8.7/15 | 3×50+3×25/3 | 20004660 | 5DK5063 | 9.9 | 4.2 | 47.1 | 50.1 | 501 | 3840 | 3000 | 4500 | 0.39 | 215 | 7.15 |
| 8.7/15 | 3×70+3×35/3 | 20004661 | 5DK5064 | 11.8 | 5 | 52 | 56 | 560 | 5010 | 4200 | 6300 | 0.28 | 265 | 10.01 |
| 8.7/15 | 3×95+3×50/3 | 20148256 | 5DK5065 | 13.8 | 5.9 | 57.2 | 61.2 | 612 | 6070 | 5700 | 8550 | 0.21 | 319 | 13.59 |
| 8.7/15 | 3×120+3×70/3 | not published | 5DK5066 | 15.4 | 7 | 62.1 | 66.1 | 661 | 7480 | 7200 | 10800 | 0.16 | 371 | 17.16 |
| 8.7/15 | 3×150+3×70/3 | not published | 5DK5067 | 17.2 | 7 | 65.9 | 69.9 | 699 | 8630 | 9000 | 13500 | 0.13 | 428 | 21.45 |
| 8.7/15 | 3×185+3×95/3 | not published | 5DK5068 | 19 | 8 | 69.8 | 73.8 | 738 | 10140 | 11100 | 16650 | 0.11 | 488 | 26.46 |
| 8.7/15 | 3×240+3×120/3 | not published | 5DK5070 | 21.8 | 9 | 77.3 | 81.3 | 813 | 12860 | 14400 | 21600 | 0.08 | 574 | 34.32 |
| 8.7/15 | 3×300+3×150/3 | not published | 5DK5071 | 24.4 | 10 | 84.2 | 89.2 | 892 | 15730 | 18000 | 27000 | 0.07 | 660 | 42.9 |
| 12/20 | 3×25+3×25/3 | 20004698 | 5DK5521 | 7.1 | 4.2 | 44.1 | 47.1 | 471 | 2950 | 1500 | 2250 | 0.8 | 139 | 3.58 |
| 12/20 | 3×35+3×25/3 | 20004699 | 5DK5522 | 8.3 | 4.2 | 46.6 | 49.6 | 496 | 3440 | 2100 | 3150 | 0.57 | 172 | 5.01 |
| 12/20 | 3×50+3×25/3 | 20119477 | 5DK5523 | 9.9 | 4.2 | 51.8 | 55.8 | 558 | 4300 | 3000 | 4500 | 0.39 | 215 | 7.15 |
| 12/20 | 3×70+3×35/3 | 20025103 | 5DK5524 | 11.8 | 5 | 55 | 59 | 590 | 5350 | 4200 | 6300 | 0.28 | 265 | 10.01 |
| 12/20 | 3×95+3×50/3 | 20004700 | 5DK5525 | 13.8 | 5.9 | 61.6 | 65.6 | 656 | 6660 | 5700 | 8550 | 0.21 | 319 | 13.59 |
| 12/20 | 3×120+3×70/3 | 20168895 | 5DK5526 | 15.4 | 7 | 65.1 | 69.1 | 691 | 7870 | 7200 | 10800 | 0.16 | 371 | 17.16 |
| 12/20 | 3×150+3×70/3 | not published | 5DK5527 | 17.2 | 7 | 69 | 73 | 730 | 9060 | 9000 | 13500 | 0.13 | 428 | 21.45 |
| 12/20 | 3×185+3×95/3 | not published | 5DK5528 | 19 | 8 | 74.3 | 78.3 | 783 | 10850 | 11100 | 16650 | 0.11 | 488 | 26.46 |
| 12/20 | 3×240+3×120/3 | not published | 5DK5530 | 21.8 | 9 | 80.3 | 84.3 | 843 | 13340 | 14400 | 21600 | 0.08 | 574 | 34.32 |
| 12/20 | 3×300+3×150/3 | not published | 5DK5532 | 24.4 | 10 | 87.2 | 92.2 | 922 | 16250 | 18000 | 27000 | 0.07 | 660 | 42.9 |
* Reference Part / MLFB belong to the source comparison matrix; do not use them as Feichun order codes. The source current applies to rubber cable laid on a surface at 30°C ambient temperature; other conditions require correction/derating.
14. Energy + data: LWL branch for automation
A port crane or large mining machine may need to carry not only power but also feedback, condition monitoring, control and high-speed data in one moving system. In this case, the LWL branch — PROTOLON(SMK)-LWL (N)TSKCGEWOEU or a project-specific Feichun hybrid execution — is considered. The published Feichun featured specification retains the designation 3X70 + 1G70/3*3X((4X2.5)C) + FO 12 E9/125; which should be requested in its original form and confirmed against the construction drawing.
| Fibre type | Core / cladding / coating diameter | Attenuation | Bandwidth / dispersion | Practical role |
|---|---|---|---|---|
| G50/125 µm | 50 / 125 / 250 µm | <2.8 dB/km at 850 nm; <0.8 dB/km at 1310 nm | >400 MHz at 850 nm; >1200 MHz at 1300 nm | Multimode data for control/automation |
| G62.5/125 µm | 62.5 / 125 / 250 µm | <3.3 dB/km at 850 nm; <0.9 dB/km at 1310 nm | >400 MHz at 850 nm; >600 MHz at 1300 nm | Multimode legacy/industrial data |
| E9/125 µm | 9 / 125 / 250 µm | <0.4 dB/km at 1310 nm; <0.3 dB/km at 1550 nm | Chromatic dispersion <3.5 ps/nm·km at 1300/1550 nm | Single-mode long-distance data |
| Design count | 6, 12, 18 or 24 fibres | Exact layout by LWL design | Six tubes around central support; colour coding | Power + data in one mobile cable |
Optical protection
Optical tubes, central support, filling compound and fibre coding must be coordinated with cable bending, torsion, termination and transport conditions. Fiber is not a free add-on inside any standard cable.
Optical tubes, central support, filling compound and fibre coding must be coordinated with cable bending, torsion, termination and transport conditions. Fiber is not a free add-on inside any standard cable.
Factory preparation
Fibre preparation requires dedicated tools and skills. For mobile MV/LWL, factory-assembled ends or an agreed procedure with exact connection dimensions is normally safer.
Fibre preparation requires dedicated tools and skills. For mobile MV/LWL, factory-assembled ends or an agreed procedure with exact connection dimensions is normally safer.
EMC and data
The symmetrical three-core power architecture and separate screened controls/TSP/LWL reduce the risk of placing the data signal in an unsuitable electrical environment.
The symmetrical three-core power architecture and separate screened controls/TSP/LWL reduce the risk of placing the data signal in an unsuitable electrical environment.
15. Variant comparison: where each branch is justified
| Variant | Voltage | Torsion | Tensile | Bending / geometry | When to use |
|---|---|---|---|---|---|
| NTSCGEWOEU base | 3.6/6–12/20 | ±100°/m | 25 N/mm² rule | 6D fixed / 10D flexible / 20D S-type | Mining trailing/reeling; exact environment |
| PROTOLON(SMK) | 1.8/3–12/20 | ±25°/m | 20 N/mm² static; 30 N/mm² dynamic | DIN VDE 0298-3; free-moving data table; 20D S-type | High to extreme dynamics, fast cranes and rollers |
| PROTOLON(SB) | 1.8/3–18/30 | ±100°/m | 15 N/mm² static | 6D fixed / 10D flexible | Reinforced opencast mining trailing |
| PROTOLON(ST) | 3–30 | ±25°/m | 15 N/mm² | 6D fixed / 10D moving | Water, dredger, floating dock, pump; up to 500 m source limit |
| SMK-LWL | Project range | Project-specific | Up to 30 N/mm² in reference architecture | Optical preparation is its own mechanical qualification | Power + optical data; factory termination recommended |
Comparative conclusion: SMK is not a cosmetic version of SMRT but a separate high/extreme mechanical architecture. SB reinforces the trailing branch with reinforcing tape, ST addresses water duty, and LWL adds optical data with its own preparation procedure. Selecting only by maximum voltage or Dmax is incorrect.
16. Engineering formulas and quick checks
Fstatic ≈ σstatic × 3 × Sphase
Fdynamic ≈ σdynamic × 3 × Sphase
Rflex ≈ 10 × Dmax; Rfixed ≈ 6 × D; S-type ≥ 20 × D
P3φ ≈ √3 × ULL × I × cosφ
ΔUresistive ≈ √3 × I × R20 × L
Icharging ≈ 2πfC U0 LHere Sphase is the cross-sectional area of one power phase, ULL is line-to-line voltage, and L is the route length in km for resistance calculation. These formulas are preliminary: reactance, cosφ, temperature, grouping, number of reel layers and duty cycle must be included in the final calculation.
Example 1 · 3×95+2×25+16
From the base Feichun table: Dmax 66 mm, mass 5860 kg/km, Fmax 7125 N, R20 0.21 Ω/km and current 301 A. For preliminary installation: Rfixed ≈ 396 mm, Rflex ≈ 660 mm and S-type ≈ 1320 mm. This does not replace the reel design calculation.
From the base Feichun table: Dmax 66 mm, mass 5860 kg/km, Fmax 7125 N, R20 0.21 Ω/km and current 301 A. For preliminary installation: Rfixed ≈ 396 mm, Rflex ≈ 660 mm and S-type ≈ 1320 mm. This does not replace the reel design calculation.
Example 2 · SMK 12/20 kV, 3×300+3×150/3
Reference matrix: Dmax 92.2 mm, Rfree 922 mm, mass 660 kg/km, Fstatic 18 000 N, Fdynamic 27 000 N, current 660 A, Isc 42.9 kA. At ULL 20 kV and cosφ 0.9, the idealized active power is approximately 20.58 MW.
Reference matrix: Dmax 92.2 mm, Rfree 922 mm, mass 660 kg/km, Fstatic 18 000 N, Fdynamic 27 000 N, current 660 A, Isc 42.9 kA. At ULL 20 kV and cosφ 0.9, the idealized active power is approximately 20.58 MW.
Reel logistics
The separate Feichun reeling specification gives a 59.9–66.5 mm diameter range and mass of at least 5.8 kg/m for 95 mm²; the 7-page specification for the featured 3×95+2×25+16 gives 500 m per drum, gross weight 6100 kg per drum and dimensions of 1.8×1.8×1.4 m.
The separate Feichun reeling specification gives a 59.9–66.5 mm diameter range and mass of at least 5.8 kg/m for 95 mm²; the 7-page specification for the featured 3×95+2×25+16 gives 500 m per drum, gross weight 6100 kg per drum and dimensions of 1.8×1.8×1.4 m.
17. Installation, reel and operation
Unwinding
Unwind from the reel in the direction specified by the manufacturer; avoid side-pull, local overbending and twisting of a free coil. Keep the ends sealed.
Unwind from the reel in the direction specified by the manufacturer; avoid side-pull, local overbending and twisting of a free coil. Keep the ends sealed.
Minimum radius
For the base branch, the guide values are fixed 6D, flexible 10D and S-type 20D. For SMK, use the published free-moving radius and design instruction rather than the general formula alone.
For the base branch, the guide values are fixed 6D, flexible 10D and S-type 20D. For SMK, use the published free-moving radius and design instruction rather than the general formula alone.
Reel
Check reel diameter, groove, flange, number of layers, speed, acceleration, cable weight, tension control and roller alignment. With multilayer winding, current derating and mechanics must be calculated together.
Check reel diameter, groove, flange, number of layers, speed, acceleration, cable weight, tension control and roller alignment. With multilayer winding, current derating and mechanics must be calculated together.
Glands and termination
Do not damage the MV field-control layers with a knife or excessive tensile force. Check cold-strip length, semicon residue, stress cone, screen/PE bonding, strain relief and connection torque.
Do not damage the MV field-control layers with a knife or excessive tensile force. Check cold-strip length, semicon residue, stress cone, screen/PE bonding, strain relief and connection torque.
Ground trailing
Avoid sharp edges, stones, weld spatter and continuous dragging over one location. Change the travel path periodically when the machine permits and keep a sheath-damage log.
Avoid sharp edges, stones, weld spatter and continuous dragging over one location. Change the travel path periodically when the machine permits and keep a sheath-damage log.
Cold conditions
Cable temperature during bending may be more important than air temperature. Base, SMK, SB and ST have different mobile/flexible limits; warming and installation method must be part of the procedure.
Cable temperature during bending may be more important than air temperature. Base, SMK, SB and ST have different mobile/flexible limits; warming and installation method must be part of the procedure.
Water branch: only PROTOLON(ST) or a dedicated water execution should be considered for dredgers, floating docks and pumps and for the published depth up to 500 m. Do not transfer a water-depth claim to ordinary mining/reeling NTSCGEWOEU.
18. Testing and acceptance
- Check the sheath marking against the order: type, cores × cross-section, rated voltage, year/serial and construction suffix.
- Check conductor resistance at 20°C, PE continuity, pilot/control continuity, screen/earth bonding and insulation test according to the approved test plan.
- For MV termination, document stripping lengths, EPR condition, semiconductive screen, stress-control components and torque.
- For reeling/festoon, establish a baseline for Dmax, ovality, surface condition, trolley alignment, roller pressure, reel layers, speed and acceleration.
- For high/extreme executions, include reversed-bending, torsion and dynamic-tensile evidence when required by the contract and design qualification.
- Check the validity and scope of the CE/UKCA/EAC/GOST/fire dossier/ATEX/IECEx for the exact product, batch, equipment and market.
- After commissioning, maintain an inspection log covering cuts, blistering, flattening, sheath hardening, local heating, screen continuity, water ingress and abnormal torsion.
19. FMEA: typical selection and operating errors
Wrong branch: a standard mining cable is treated as high/extreme SMK; the result is accelerated wear on rollers and during acceleration peaks.
Mixed mechanical limits: ±100°/m, ±25°/m, 15, 20 and 30 N/mm² are transferred between base, SB, ST and SMK without checking the datasheet.
Dmax overestimation: Dmax from one document revision is used for another revision’s reel; winding, mass and radius become incorrect.
Wrong current: the on-floor current is treated as the reeling current for 4–7 layers; the sheath and conductor overheat.
Poor termination preparation: damaged semicon or incorrect stress control creates partial-discharge risk even when the cable matrix was selected correctly.
Certificate without scope: a general fire/CE/EAC/ATEX term is used without checking the batch, voltage, connector, gland and site.
Water by default: the phrase “rubber cable” is incorrectly treated as a permanent water cable; water depth and chemistry are confirmed only by the ST/water dossier.
Fibre module treated as an accessory: LWL is added after manufacture without optical/mechanical qualification; it fails during bending and termination.
20. Sources, limitations and technical support
| Source | Role in this article | Data used |
|---|---|---|
| Feichun NTSCGEWOEU Mining Cable Technical Specification | Primary Feichun source layer | 3×35+2×16+16; 3×95+2×25+16; EPR 3GI3; semi-conductive EPR/NBR; PE/pilot; 3.6/6 kV; mechanical, physical and electrical tables; 500 m drum logistics. |
| Feichun NTSCGEWOEU Reeling Cable Specification | Reeling-specific matrix | 3.6/6 kV table; Dmin/Dmax; weight; tensile force; R20; capacitance; inductance; current; Isc; special PE/pilot rows. |
| Feichun NTSCGEWOEU featured specification | Construction and hybrid data | 3X70 + 1G70/3*3X((4X2.5)C) + FO 12 E9/125; voltage family; test voltages; ±25°/m; central filler; polyester braid; standards list. |
| Feichun PROTOLON(SMK) specification | High/extreme mechanical branch | Class FS tinned copper; PROTOLON HS; PROTOFIRM Sandwich; ±25°/m; 20/30 N/mm²; −50…+80°C fixed; −35…+80°C flexible; Russia/export dossier. |
| Feichun PROTOLON(SB) specification | Reinforced branch | 1.8/3–18/30 kV; 90/250°C; ±100°/m; 15 N/mm²; reinforcing tape; GOST/fire and mining approvals. |
| Feichun PROTOLON(ST) water specification | Water branch boundary | Dredger/floating dock/pump applications and water-depth statement; used only for explicit ST/water execution. |
| Prysmian Medium-Voltage Round PDF | Independent engineering cross-check | Field names and reference matrix for PROTOLON(SMK) (N)TSCGEWOEU: dimensions, weights, current, Isc, tensile and LWL fibre parameters. |
| IEC official standards pages | Normative argument support | IEC 60228 conductors; IEC 60332-1-2 flame test; IEC 60811-404 mineral-oil immersion; ATEX official EU overview. |
Liability limitation: The SVG illustrations and engineering explanations support preliminary selection and technical research. They do not replace an approved drawing, factory test report, certificate, installation manual or a calculation by the responsible engineer.
