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Product

Medium-voltage armoured tunnel & mining cables18/30 kV (Um 36 kV)3GI3 EPR + Cu ScreenGSWB Armour ≥ 90%

3GSEYQY 18/30 kV EPR-Insulated Steel-Braid Armoured Tunnel CableIndividual 16 mm² copper core screens + ≥ 90 % galvanized steel wire braid armour

Medium-voltage 18/30 kV (Um = 36 kV) screened and armoured tunnel power cable (3GSEYQY) to DIN VDE 0250-605 and IEC 60502-2, with Class 2 copper cores, 3GI3 EPR insulation, 16 mm² copper screens, ≥ 90 % steel wire braid armour, and red outer sheath.

Low-EMC design
Flame-retardant
Oil-resistant
Outdoor & humid
Order designation
3GSEYQY 3 × 70/16
OD min
74.5 mm
OD max
82.4 mm
Weight ≈
9,760 kg/km
Max. pull
3,150 N
Check against my drumAll sizes (6)
Request a quoteDatasheetWhatsApp
Engineering reply in 2 business hoursCut-to-length export drumsEN 10204 3.1 certificate per drum
Rated voltage
18/30 kV
Um = 36 kV · 48 kV AC test
Core insulation
3GI3 EPR
DIN VDE 0207-20 (+90 °C)
Armour & screen
Cu + GSWB ≥ 90%
16 mm² Cu + steel braid
Tensile load
15 N/mm²
1,125 N to 5,400 N pull
Torsion stress
±25 °/m
Semi-mobile relocation
Outer sheath
Red 5GM5 / FR
High-visibility MV red

Typical values for this cable type, based on DIN VDE 0250-605 / IEC 60502-2 — confirmed in the datasheet and quotation for your order.

Application fit

Is 3GSEYQY 18/30 kV right for your machine?

Pliable steel-wire-armoured EPR-insulated MV tunnel and mining feeder cable (GSEYQY 6/10 kV) for semi-mobile transformer skids and tunnel walls.

Mine roadway & tunnel wall hangers

Suitable

Primary duty — tunnel wall brackets and mine roadway hangers feeding advancing TBM/mining substations.

Fixed installation

Suitable

Steel-wire armour resists rock impact, shotcrete rebound and haulage vehicle contact.

Trailing & towing

With conditions

Permits periodic dragging and extension as tunnel power skids advance.

TBM gantry & advancing tunnel reel

Not suitable

For the active advancing TBM backup gantry reel itself, use unarmoured (N)TSCGECWÖU.

Use (N)TSCGECWÖU TBM Reel

Motorised monospiral reel

Not suitable

Wire armour is not suitable for continuous motorised drum reeling.

Use (N)TSCGEWÖU MV Reel
Typical machinesTunnel boring machine (TBM) 30 kV feedersUnderground mine main shaft & drift feedersMobile skid-mounted MV mine substationsHydroelectric cavern & metro tunnel constructionOpen-pit quarry & overland conveyor ringsHeavy civil engineering temporary MV grids

Construction

Layer by layer

Shown: 3GSEYQY 3 × 70/16 mm² 18/30 kV — Class 2 stranded bare copper conductors, inner semi-conductive layer, 3GI3 EPR insulation, outer semi-conductive layer, 16 mm² copper tape screen over each core, extruded PVC bedding, ≥ 90 % galvanized steel wire braid armour and red outer sheath.

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Schematic, not to scale — generated from the layer data
#LayerMaterial & reference
1ConductorsCircular stranded bare copper, Class 2 per DIN VDE 0295 / IEC 602283 × 25 mm² to 3 × 120 mm² phase conductors
2Inner semi-conductive screenExtruded semi-conductive elastomer layer over each copper conductorHomogenizes radial electric stress at 18/30 kV
3Core insulation (3G)Ethylene-propylene rubber compound type 3GI3 per DIN VDE 0207-2018/30 kV (Um = 36 kV) · +90 °C continuous / +250 °C short-circuit
4Outer semi-conductive screenStrippable semi-conductive elastomer layer over the 3GI3 insulationEnsures void-free interface with metallic screen
5Individual metallic core screen (SE)Helically lapped bare copper tape screen over each phase core (16 mm² collective earth cross-section)Confines electric field and carries earth-fault current
6Inner bedding sheath (Y)Extruded PVC filler bedding over the three screened phase coresForms circular bedding under the steel wire braid
7Galvanized steel wire braid armour (Q)Braided galvanized steel wires with ≥ 90 % optical coverageHigh rockfall impact, crush and rodent resistance
8Outer sheath (Y)Heavy-duty flame-retardant special PVC / 5GM5 compound, high-visibility redIEC 60332-1-2 flame-retardant · Oil, abrasion & moisture resistant

3GSEYQY 18/30 kV (3×25/16 – 3×120/16)

3GI3 EPR-insulated 18/30 kV (Um = 36 kV) 3-core tunnel feeder with 16 mm² copper screen and ≥ 90 % steel wire braid

Technical data

Ratings & operating limits

Typical values: Typical values for this cable type, based on DIN VDE 0250-605 / IEC 60502-2. Values for your order are confirmed in the datasheet and quotation.

Electrical

Rated voltage U0/U (Um)
18/30 kV (Um = 36 kV) per IEC 60502-2 / DIN VDE 0250-605
AC test voltage
48 kV AC routine dielectric test

Thermal

Ambient operating temperature
-25 to +60 °C flexible / relocation · -40 to +80 °C fixed installation
Max. conductor temperature
+90 °C continuous operation · +250 °C short-circuit (max. 5 s)

Mechanical

Permissible tensile & torsional load
15 N/mm² tensile load (1,125 N to 5,400 N) · ±25 °/m max. torsional stress
Min. bending radius
15 × D during pulling / relocation · 10 × D fixed installation (DIN VDE 0298-3)

Reference standards

Reference standards
DIN VDE 0250-605 · IEC 60502-2 · DIN VDE 0295 / IEC 60228 Class 2 · DIN VDE 0207-20 (3GI3)
Fire & environmental performance
Flame-retardant IEC 60332-1-2 · Oil-resistant IEC 60811-404 · Impact & crush resistant steel wire braid (≥ 90%)

Sizes

Dimensions, weights, conductor resistance & current ratings

6 medium-voltage 18/30 kV configurations from 3 × 25/16 mm² to 3 × 120/16 mm²

Dimensions & mechanical data
Order designationCores × mm²OD min
mm		OD max
mm		Total weight ≈
kg/km		Min. bend R (fixed)
mm		Max. pull (15 N/mm²)
N		Enquiry
3GSEYQY 3 × 25/163 × 25/1665.172.06,8607201,125
3GSEYQY 3 × 35/163 × 35/1668.075.17,6407511,575
3GSEYQY 3 × 50/163 × 50/1670.878.38,5207832,250
3GSEYQY 3 × 70/163 × 70/1674.582.49,7608243,150
3GSEYQY 3 × 95/163 × 95/1679.087.211,2808724,275
3GSEYQY 3 × 120/163 × 120/1682.290.912,6009095,400
  • Typical values for this cable type; dimensions and weights for your order are confirmed in the quotation.
  • All sizes incorporate a 16 mm² copper tape screen over each core plus a ≥ 90 % coverage galvanized steel wire braid armour.

Reel check

Will it fit your machine?

A first screen using datasheet values. Engineering confirms drum geometry, acceleration and tension with your quotation.

Check results

Drum core 1,000 mm is below 1,648 mmUse a larger drum core or a smaller cable size
10 m/min ≤ 15 m/minWithin the rated travel speed
2,500 N exceeds 0 N dynamicChoose a larger cross-section or reduce tension
Minimum bending radius
824 mm
Min. drum core diameter
≈ 1,648 mm
Cable weight on drum
1,464.0 kg
Outer diameter
82.4 mm
Indicative only: based on the datasheet outer diameter and 10 × OD bending radius. Current derating for wound layers per DIN VDE 0298-4 is assessed separately.

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
High-voltage AC dielectric test48 kV ACEvery drum length
Partial discharge testIEC 60502-2 / DIN VDE 0250-605Every drum length
Conductor & screen DC resistance at 20 °CIEC 60228 Class 2Every drum length
Sample tests
Flame propagationIEC 60332-1-2Per production batch

Inspection certificate

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

Product approvals

18/30 kV (Um 36 kV)CE · LVDRoHS · REACH

Company certificates

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

Marking & supply

Ordering & delivery

Sheath marking

TEBAOFLEX 3GSEYQY 18/30 kV [3×mm²/16] · DIN VDE 0250-605 · CE · [year] · [metre mark]
Standard packing
Heavy-duty steel or reinforced wooden drums for tunnel & mine transport
HS code
8544.60

Technical documents

Downloads

PDF3GSEYQY 18/30 kV EPR-Insulated Steel-Braid Armoured Tunnel Cable – technical datasheet6 sizes · construction, technical data, approvalsXLSX3GSEYQY 18/30 kV spec data (Excel)All 6 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 VDE type designation 3GSEYQY stand for?
'3G' denotes heat- and ozone-resistant 3GI3 ethylene-propylene rubber (EPR) core insulation; 'SE' denotes individual semi-conductive and metallic copper screens over each phase core; 'Y' denotes the extruded PVC inner bedding; 'Q' denotes the galvanized steel wire braid armour (≥ 90 % coverage); and the final 'Y' denotes the flame-retardant red outer sheath.
How does 3GSEYQY (18/30 kV) differ from 2XSEYQY (6/10 kV)?
3GSEYQY uses flexible 3GI3 EPR rubber core insulation rated for 18/30 kV (Um = 36 kV, 48 kV AC test), whereas 2XSEYQY uses cross-linked polyethylene (2X / XLPE) core insulation rated for 6/10 kV (Um = 12 kV, 17 kV AC test). Both share the same SE + Y + Q + Y individually copper-screened and steel-wire-braid armoured tunnel construction.
Can 3GSEYQY be used on motorized TBM cable reels?
No. 3GSEYQY uses Class 2 stranded copper conductors and a galvanized steel wire braid armour designed for fixed tunnel wall brackets, shaft installation and semi-mobile substation relocation. For motorized TBM or excavator reeling drums at 18/30 kV, specify Class 5 rubber reeling cable NTSCGEWÖU.
Why does 3GSEYQY have both copper tape core screens and a steel wire braid?
The 16 mm² copper tape screen over each core confines the 18/30 kV radial electric field and provides a low-impedance earth-fault return path, while the outer ≥ 90 % galvanized steel wire braid ('Q') protects the cable against rockfall, crushing, blast debris and tensile pulling loads during tunnel advancement.

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GSEYQY 3GSEYQY Screened Tunnel Cable

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