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Product

CHCU / CHVU open-cast MV & EHV trailing cables20/35 kV (Umax 42 kV)DIN VDE 0250-813 BasisTriple-Extruded HEPR/EPR

35-CHVU Mining-Machine Trailing Power Cable20/35 kV (Umax 42 kV) screened EPR/PCP trailing power cable for walking draglines &

35-CHVU is an extra-high medium-voltage 20/35 kV (Umax 42 kV) flexible trailing power cable engineered for mega-scale open-pit walking draglines, bucket-wheel excavators, and in-pit crushing stations, featuring triple-extruded HEPR/EPR insulation (V)

EMC screen
Oil-resistant
Flame-retardant
Ozone, UV & moisture
Order designation
35-CHVU 3×95+3×50/3E 20/35 kV
Outer Ø ≈
86.5 mm
Copper weight
3,680 kg/km
Total weight ≈
10,350 kg/km
Min. bend R (fixed)
865 mm
All sizes (7)
Request a quoteDatasheetWhatsApp
Engineering reply in 2 business hoursCut-to-length export drumsEN 10204 3.1 certificate per drum
Rated voltage
20/35 kV
Umax 42 kV AC 3-phase
AC test voltage
50 kV / 65 kV
5 min routine HV dielectric test
Stress control
Triple-Extruded
Inner/outer semicon H + HEPR V
Phase screen
Copper Screen C
Tinned Cu wire/tape + split earth
Outer sheath
5GM5 PCP (U)
UV, ozone & tear-proof rubber
Min. bend radius
10×D / 12×D
Fixed 10×D · trailing 12×D

Typical values for this cable type, based on DIN VDE 0250-813 / Enterprise 20/35 kV MV Trailing — confirmed in the datasheet and quotation for your order.

Application fit

Is 35-CHVU right for your machine?

Designed specifically for 35 kV open-cast mine bench feeders supplying walking draglines, giant electric rope shovels, bucket-wheel excavators, and mobile overland conveyor stations.

Trailing & towing

Suitable

Heavy double-layer 5GM5 outer sheath resists boulder abrasion and skid-sled dragging on pit benches.

Motorised monospiral reel

Suitable

Suitable for large-diameter motorized cable reel cars and Benninghoven/pit cable carriers.

Fixed installation

Suitable

Used on semi-mobile pit perimeter skids, cable bridges, and substation drop towers.

Immersion & wet locations

Suitable

Water-resistant HEPR insulation and polychloroprene sheath tolerate flooded pit sumps.

Festoon & line chain

Not suitable

Large outer diameter (75–105 mm) is too heavy for light overhead festoon trolleys.

NTSKCGECWÖU 3.6/6–6/10 kV
Typical machinesOpen-cast coal & lignite minesWalking draglines & bucket-wheel excavatorsIn-pit mobile crushing & conveying (IPCC)Copper & iron-ore surface mega-mines

Construction

Layer by layer

Three Class 5 tinned copper phase conductors, triple-extruded inner semicon + 20/35 kV HEPR/EPR dielectric (V) + outer semicon (H), tinned

123456
Schematic, not to scale — generated from the layer data
#LayerMaterial & reference
1Phase conductorsFinely stranded tinned annealed copper, Class 5 per IEC 60228IEC 60228 Class 5
2Inner & outer semicon (H)Clean-stripping vulcanised semi-conductive elastomeric layers (Halbleiterschicht)DIN VDE 0250-813
320/35 kV HEPR/EPR dielectric (V)High-grade ozone- and partial-discharge-resistant cross-linked EPR/HEPR compoundDIN VDE 0207-20 / IEC 60502-2
4Metallic phase screen (C)Helical tinned copper wires/tapes + interstitial split earth conductorsDIN VDE 0250-813
5Inner elastomeric beddingPressure-extruded GM1b/5GM3 inner sheath with anti-torsion textile reinforcementDIN VDE 0250-813
6Outer sheath (U)Extra-heavy-duty flame-retardant, oil-, UV- and tear-resistant polychloroprene 5GM5DIN VDE 0207-21

35-CHVU 3×(50–185) + 3×E

3 screened 20/35 kV phase cores + 3 symmetrical interstitial split earth conductors.

35-CHVU + Pilot / FO

Optional interstitial pilot monitoring core or single-mode optical fibre tube for dragline telemetry.

Technical data

Ratings & operating limits

Typical values: Typical values for this cable type, based on DIN VDE 0250-813 / Enterprise 20/35 kV MV Trailing. Values for your order are confirmed in the datasheet and quotation.

Electrical

Rated voltage U0/U (Umax)
20/35 kV (Umax 42 kV)
AC routine test voltage
50 kV rms / 5 min (or 65 kV DC per project
Partial discharge level
≤ 10 pC at 1.73 U0 (35 kV)
Dielectric loss factor tan δ
≤ 0.015 at U0

Thermal

Max. conductor operating temp.
+90 °C
Max. short-circuit temperature
+250 °C (5 s)
Ambient temperature (trailing)
-25 °C to +60 °C (-40 °C cold-pit option)
Ambient temperature (fixed)
-40 °C to +80 °C

Mechanical

Max. tensile load on copper
15–20 N/mm²
Min. bending radius (fixed)
10 × cable outer diameter
Min. bending radius (trailing)
12 × cable outer diameter

Resistance

Ozone & corona resistance
DIN EN 60811-403 ozone-proof 3GI3/HEPR
Oil & diesel fuel resistance
DIN EN 60811-404 (5GM5 compound)
Flame retardancy
DIN EN 60332-1-2 self-extinguishing
UV & solar radiation
Carbon/UV-stabilised outer sheath for

Reference standards

Design basis
DIN VDE 0250-813 / ICEA S-75-381 35 kV class
Conductor standard
IEC 60228 Class 5 tinned copper
Sheath standard
DIN VDE 0207-21 (5GM5)

Identification

Core identification
Phase cores numbered 1, 2, 3 + split earth
Outer sheath colour
Red or Yellow high-visibility pit jacket

Sizes

7 standard configurations (35-CHVU)

Nominal dimensions, copper weights and electrical parameters for 35-CHVU per DIN VDE 0250-813 / Enterprise 20/35 kV MV Trailing.

Dimensions & weights
Order designationConfigurationPhase size mm²Outer Ø ≈
mm		Copper
kg/km		Weight ≈
kg/km		Min. bend R
fixed mm		Enquiry
Standard 35-CHVU configurations
35-CHVU 3×35+3×16/3E 20/35 kV3×35 + 3×16/3E (20/35 kV)3572.01,4806,450720
35-CHVU 3×50+3×25/3E 20/35 kV3×50 + 3×25/3E (20/35 kV)5076.51,9807,480765
35-CHVU 3×70+3×35/3E 20/35 kV3×70 + 3×35/3E (20/35 kV)7081.22,7108,720812
35-CHVU 3×95+3×50/3E 20/35 kV3×95 + 3×50/3E (20/35 kV)9586.53,68010,350865
35-CHVU 3×120+3×70/3E 20/35 kV3×120 + 3×70/3E (20/35 kV)12091.54,65011,920915
35-CHVU 3×150+3×70/3E 20/35 kV3×150 + 3×70/3E (20/35 kV)15096.85,56013,580968
35-CHVU 3×185+3×95/3E 20/35 kV3×185 + 3×95/3E (20/35 kV)185102.06,89015,6401,020
  • Typical values for this cable type; dimensions and weights for your order are confirmed in the quotation.
  • Outer diameters and weights are nominal factory values subject to ±5 % manufacturing tolerance per DIN VDE 0250-813 / Enterprise 20/35 kV MV Trailing.

Quality & approvals

Testing & inspection

Routine tests on every production length, sample and type tests per batch — documented on an EN 10204 3.1 inspection certificate.

  1. ConductorClass 5 stranding
  2. Spark test100 % in-line
  3. Lay-upCores, earth, fillers
  4. SheathingInner, braid / screen, outer
  5. Electrical testsAC voltage, resistance
  6. DimensionsOD, wall thickness
  7. Inspection documents & dispatchDrum & dispatch
Testing & inspectionTest value / referenceFrequency
Routine tests
50 kV AC dielectric test50 kV rms / 5 min without breakdown100 % of drums
Partial discharge test≤ 10 pC at 1.73 U0 (35 kV)100 % of drums
Sample tests
Tan δ & hot-set testIEC 60502-2 / DIN VDE 0250-813Per production batch
Impulse voltage withstand170 kV BIL lightning impulse testType approval

Inspection certificate

Issued with every drum, listing the routine test results for that length.

Product approvals

DIN VDE 0250-813 BasisIEC 60502-2 / ICEA S-75-381EN 10204 3.1

Company certificates

ISO 9001ISO 14001ISO 45001VDE marks approvalUL / cULCE · LVD / EMC

Marking & supply

Ordering & delivery

Sheath marking

TEBAOFLEX 35-CHVU 20/35 kV (Umax 42 kV)
Delivery form
Fumigated export wooden drums
Standard drum lengths
300 m · 500 m · 1000 m (or custom cut
MOQ
100 m (stock sizes) · 300 m (custom build)
Lead time
3–5 weeks ex-works
Incoterms
EXW, FOB, CIF, DAP

Technical documents

Downloads

PDF35-CHVU Mining-Machine Trailing Power Cable – technical datasheet7 sizes · construction, technical data, approvalsXLSX35-CHVU spec data (Excel)All 7 sizes with dimensions and data, for your BOM or quotation
Revision
2026-10-20
Updated
2026-10-20

FAQ

Questions engineers ask first

Not covered here? Send your drawing — an engineer replies within 2 business hours.

What does the designation 35-CHVU stand for?
'35' indicates the 35 kV three-phase system voltage class (rated U0/U = 20/35 kV, Umax = 42 kV), 'C' denotes the metallic copper phase screens, 'H' stands for the inner and outer semi-conductive field-grading layers (Halbleiterschicht), 'V' indicates cross-linked HEPR/EPR insulation, and 'U' denotes the flame-retardant polychloroprene outer sheath.
How is partial discharge suppressed at 20/35 kV under trailing flexing?
The inner semi-conductive conductor screen, 20/35 kV HEPR/EPR insulation wall, and outer semi-conductive insulation screen are co-extruded and dry-cured in a single triple-head vulcanisation line. This prevents micro-voids at layer interfaces even when the cable bends over pit cable bridges and reel cars. Each production drum undergoes routine dielectric voltage testing, conductor DC resistance verification, and sheath dimensional inspection before dispatch with an EN 10204 3.1 mill test certificate.
What equipment typically uses 35-CHVU trailing power cables?
35-CHVU feeds high-megawatt open-cast mining machinery operating on 33 kV or 35 kV pit distribution rings, including walking draglines, bucket-wheel excavators, giant crawler-mounted spreader systems, and mobile in-pit primary crushers. Each production drum undergoes routine dielectric voltage testing, conductor DC resistance verification, and sheath dimensional inspection before dispatch with an EN 10204 3.1 mill test certificate.
How are terminations and couplers handled on 35-CHVU?
The outer semi-conductive layer (H) is engineered with controlled peel strength so field jointers can strip it cleanly without scoring the 20/35 kV EPR wall when installing 35 kV cold-shrink terminations or heavy-duty open-pit restrained couplers. Each production drum undergoes routine dielectric voltage testing, conductor DC resistance verification, and sheath dimensional inspection before dispatch with an EN 10204 3.1 mill test certificate.

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35-CHVU Mining-Machine Trailing Power Cable

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Reel & motion:
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