NTMCWOEU 26/45 kV Flexible Switchgear Cable
NTMCWOEU cable for switchgear cubicles, mobile transformer substations and selected railway or pantograph connections. This flexible single-core cable is supplied for 26/45 kV service with project-specific size, screen and test documentation.
- NTMCWOEU 26/45 kV rated voltage; 30/52 kV maximum AC operating voltage
- Tinned flexible copper conductor, class 5, with semiconductive field-control layers
- Zero-halogen cross-linked HEPR/EVA construction with a tinned copper wire screen
- 1×50/16 to 1×630/35 reference sizes; final dimensions and current capacity are confirmed to drawing
- NTMCWOEU bending guidance: 10×OD free movement, 6×OD during installation and 5×OD for one-time fixed installation
Send the NTMCWOEU size, installation mode, screen section, length, colour and required test documents for a factory quotation.
NTMCWOEU 26/45 kV flexible switchgear cable
TEBAOFLEX NTMCWOEU cable is a flexible single-core medium-voltage connection cable for switchgear cubicles, mobile transformer substations and selected railway equipment. The supplied construction data describes a tinned flexible copper conductor, zero-halogen cross-linked HEPR insulation, semiconductive electric-field control, a tinned copper wire screen and a zero-halogen EVA-based outer sheath.
The NTMCWOEU range is intended where the cable must be routed and handled around equipment while maintaining a defined medium-voltage construction. The reference sheet lists 26/45 kV rated voltage, +90 °C maximum conductor temperature, +250 °C short-circuit conductor temperature and operating temperatures from -40 °C to +80 °C. It also lists free-movement, installation and fixed-installation bending guidance based on the outer diameter.
- Typical duties: switchgear connections, mobile transformer substations, overhead-line connections and pantographs on locomotives or trains.
- Reference sizes: 1×50/16 through 1×630/35, with diameter, weight, resistance and current values shown in the Specifications tab.
- Order boundary: confirm the final size, screen section, voltage, colour, installation mode and inspection or test documents against the approved drawing.
TEBAOFLEX can manufacture the NTMCWOEU construction to the required project configuration. Request the cable drawing and quotation before treating any reference range as a guaranteed finished size.
NTMCWOEU cable construction
The NTMCWOEU construction combines a class 5 tinned copper conductor with zero-halogen insulation, screened electric-field control and a flexible tinned copper wire screen. The sheath is specified as a zero-halogen cross-linked EVA-based compound; red or black are listed, with other colours available on request.
| Element | Supplied reference |
|---|---|
| Conductor | Tinned flexible copper, class 5 |
| Insulation | Zero-halogen, cross-linked special compound; basic material HEPR; requirements based on EI110 (EN 50264-1) / HEPR (IEC 60840); light pink |
| Electric-field control | Inner and outer semiconductive rubber layers, black; core screen cold strippable |
| Screen | Spinning of tinned copper wires |
| Outer sheath | Zero-halogen, cross-linked special compound; basic material EVA; requirements based on EM104; red or black, other colours on request |
NTMCWOEU cable applications
Use the NTMCWOEU cable where a flexible single-core medium-voltage connection is required around switchgear, mobile transformer equipment or railway equipment. The supplied application reference covers the following duties:- Connection of switchgear cubicles
- Connection of mobile transformer substations to overhead lines
- Connection of pantographs on locomotives and trains
- Railway vehicles with hazard level HL3 according to DIN EN 45545-1 (2013), where the final vehicle and system approval requires it
NTMCWOEU 26/45 kV specifications
The NTMCWOEU technical range below is transcribed from the supplied reference sheets. Values for a quoted build must be checked against the approved drawing, installation arrangement and applicable correction factors.| Designation | NTMCWOEU flexible single-core medium-voltage cable |
|---|---|
| Rated voltage | 26/45 kV |
| Maximum operating voltage AC | 30/52 kV |
| Maximum operating voltage DC | 40.5/81 kV |
| AC test voltage | 87 kV |
| Voltage pulses | IEC 61287-1 |
| Short-time overvoltages | DIN EN 50124-2 |
| Long-time overvoltages | DIN EN 50163 |
| Maximum conductor temperature | +90 °C |
| Maximum conductor short-circuit temperature | +250 °C |
| Operating temperature | -40 °C to +80 °C, fixed installation and flex operation reference |
| Bending guidance | Free movement 10×OD; during installation 6×OD; fixed installation 5×OD one time, carefully banded |
| Maximum tensile load | 15 N/mm² |
| Weather resistance | Resistant to ozone, UV and moisture |
| Oil, acid and alkaline resistance | EN 60811-404 |
NTMCWOEU reference sizes and electrical values
| Core / cross-section (mm²) | Conductor Ø max (mm) | Insulation Ø nom. (mm) | Outer Ø min–max (mm) | Fixed bend radius min. (mm) | Free-moving bend radius min. (mm) | Weight approx. (kg/km) | Resistance at 20 °C max. (Ω/km) | Current capacity (A) | Current capacity trefoil (A) | Short-circuit current (kA) |
|---|---|---|---|---|---|---|---|---|---|---|
| 1x50/16 | 9.3 | 26.8 | 36–38 | 190 | 380 | 1900 | 0.393 | 309 | 237 | 7.15 |
| 1x70/16 | 11.5 | 28.7 | 38–40 | 200 | 400 | 2400 | 0.277 | 379 | 291 | 10.0 |
| 1x95/16 | 12.9 | 30.7 | 40–42 | 210 | 420 | 2700 | 0.21 | 457 | 351 | 13.6 |
| 1x120/16 | 14.6 | 32.8 | 43–45 | 220 | 440 | 3000 | 0.164 | 531 | 408 | 17.2 |
| 1x150/25 | 16.0 | 33.2 | 44–46 | 225 | 450 | 3700 | 0.132 | 613 | 470 | 21.5 |
| 1x185/25 | 18.0 | 35.4 | 46–48 | 235 | 470 | 4200 | 0.108 | 699 | 536 | 26.6 |
| 1x240/25 | 20.6 | 38.8 | 49–51 | 255 | 510 | 4500 | 0.0817 | 823 | 632 | 34.3 |
| 1x300/35 | 23.1 | 40.5 | 52–54 | 270 | 540 | 5400 | 0.0654 | 945 | 725 | 42.9 |
| 1x400/35 | 26.5 | 44.7 | 56–58 | 285 | 570 | 6400 | 0.0654 | 1145 | 879 | 57.2 |
| 1x500/35 | 29.3 | 46.9 | 59–62 | 300 | 600 | 7400 | 0.0495 | 1288 | 989 | 71.5 |
| 1x630/35 | 33.9 | 51.5 | 64–68 | 320 | 640 | 9200 | 0.0391 | 1432 | 1099 | 90.1 |
Ambient-temperature correction factors
| Ambient °C | 10 | 15 | 20 | 25 | 30 | 35 | 40 | 45 | 50 | 55 | 60 | 65 | 70 | 75 | 80 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Factor f | 1.15 | 1.12 | 1.08 | 1.04 | 1.00 | 0.96 | 0.91 | 0.87 | 0.82 | 0.76 | 0.71 | 0.65 | 0.58 | 0.50 | 0.41 |
Installation and screen factors
| Laying arrangement | Inside tube | Surface mounting | Below ceiling |
|---|---|---|---|
| Conversion factor f | 0.80 | 0.95 | 0.90 |
| Screen cross-section (mm²) | 16 | 25 | 35 |
|---|---|---|---|
| Permissible screen short-circuit current, 1 s (kA) | 3.3 | 5.0 | 7.0 |
NTMCWOEU standards and safety references
The following standards and references appear in the supplied NTMCWOEU technical material. They describe the stated construction, application or test reference; they should not be read as a blanket certification for every size or installation. Confirm the required edition, test scope and project approval in the quotation.| Area | Reference in supplied material |
|---|---|
| Application and installation | DIN VDE 0298-3; DIN VDE 0298 Section 3; DIN VDE 0298-4 |
| Railway hazard level | DIN EN 45545-1 (2013), HL3 reference for railway vehicles |
| Insulation and cable materials | EI110 (EN 50264-1), HEPR (IEC 60840) and EM104 reference materials |
| Voltage and railway equipment references | IEC 61287-1; DIN EN 50124-2; DIN EN 50163 |
| Flame, halogen and smoke | IEC 60332-1 for a single cable; IEC 60332-3-24 for bunched cables; IEC 60754-1/-2; IEC 61034-2 |
| Toxicity and material tests | EN 50305; EN 60811-404 |
| Screen short-circuit reference | DIN VDE 0276, 1 s and 60 °C → 350 °C reference condition |
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