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Product

flexible elastomer wind turbine torsion cable GB/T 29631 / NB/T 310341.8/3 kV (0.6/1 kV) (-40 to +90 °C)Polychloroprene (CR) / CSM / CPE She

FDEF 1.8/3 kV (0.6/1 kV) GB/T 29631 & NB/T 31034 EPR/CR Torsion-Resistant Wind Power CableGB/T 29631 / NB/T 31034 — 1.8/3 kV (0.6/1 kV) — -40 to +90 °C Wind Turbine Cable

FDEF 1.8/3 kV (0.6/1 kV) GB/T 29631 & NB/T 31034 EPR/CR Torsion-Resistant Wind Power Cable (GB/T 29631 / NB/T 31034) engineered for 1.8/3 kV (0.6/1 kV) wind turbine service across -40 to +90 °C (min. bend radius 6 × OD).

Anti-torsion braid

Flame-retardant

Oil-resistant

Approved

Configuration

Order designation: FDEF 1.8 1×95 / 4G25 Cu
Outer Ø ≈: 21.6 mm
Net weight ≈: 1,080 kg/km
Max. pulling ≈: 14.2 kN
Core / stranding: IEC 60228 Class 5 Flexible Cu/SnCu

All sizes (3)

Request a quote Datasheet WhatsApp info@tebaoflex.com

Engineering reply in 2 business hoursCut-to-length export drumsEN 10204 3.1 certificate per drum

Rated voltage: 1.8/3 kV (0.6/1
Operating temp.: −40…+90 °C
Min. bend radius: 6 × OD
Core / conductor: GB/T 3956 Class
Outer protection: Polychloroprene
Standard: GB/T 29631 / NB/

Typical values for this cable type, based on GB/T 29631 & NB/T 31034 FDEF Torsion-Resistant Wind Turbine Cable Standard — confirmed in the datasheet and quotation for your order.

Application fit

Is FDEF 1.8/3 kV right for your machine?

Free-hanging vertical run

Suitable

Class 5 flexible copper cores and cross-linked EPR / silicone / PCP rubber jackets survive >10,000–18,000 yaw drip-loop torsion cycles.

Fixed installation

Suitable

Routes continuously from nacelle generators and yaw/pitch cabinets through the free-hanging drip loop into upper tower trays.

Offshore platform & shipboard deck trays

Suitable

Polychloroprene (CR/PCP), CPE, silicone (FDGG) and PUR (FDGU) sheaths resist hydraulic oil, grease, ozone, salt spray and −40 to −55 °C co

VFD inverter to AC motor screened feeder

Suitable

Copper-braid screened variants (FDEFP, FDEHP, WINDLINK WTTC) contain PWM converter electromagnetic interference along the drip loop.

Festoon & line chain

Not suitable

Wind turbine vertical torsion rubber cable is optimized for axial twist rather than high-speed trolley festoons.

Use (N)3GRDC5G-J/O Festoon Cable

Typical machinesRenewable Energy & EV ChargingOnshore & Offshore Wind Turbine Yaw Drip LoopsUltra-Cold (−55 °C) Arctic & High-Altitude Wind FarmsGB/T 29631 & NB/T 31034 Utility Wind GeneratorsNacelle Auxiliary Power, Yaw & Pitch Motor Circuits

Construction

Layer by layer

Shown: FDEF 1.8/3 kV (GB/T 29631 & NB/T 31034 FDEF Torsion-Resistant Wind Turbine Cable Standard) featuring gb/t 3956 class 5 flexible copper conductors, epr / composite epr core insulation (code e) and polychloroprene (cr) / csm / cpe sheath (code f) (3-layer construction).

Schematic, not to scale — generated from the layer data

#	Layer	Material & reference
1	GB/T 3956 Class 5 Flexible Copper Conduc	Oxygen-free plain or tinned flexible copper (1C, 3-5C or 6-37C)
2	EPR / Composite EPR Core Insulation (Cod	High-dielectric ethylene-propylene rubber rated up to 1.8/3 kV
3	Polychloroprene (CR) / CSM / CPE Sheath	Cold- (-40 °C), oil- and torsion-resistant heavy rubber jacket

FDEF 1.8/3 kV — Standard Wind Turbine Execution

Built to GB/T 29631 & NB/T 31034 FDEF Torsion-Resistant Wind Turbine Cable Standard with gb/t 3956 class 5 flexible copper conductors and polychloroprene (cr) / csm / cpe sheath (code f)

FDEF 1.8/3 kV — Pre-Cut Tower / Drip-Loop Kit

Available on bulk export reels or pre-cut to turbine tower section and nacelle drip-loop lengths

FDEF 1.8/3 kV — Cold Torsion & Routine Certified

Supplied with EN 10204 3.1 routine dielectric, conductor DC resistance & cold-torsion qualification report

Technical data

Ratings & operating limits

Typical values: Typical values for this cable type, based on GB/T 29631 & NB/T 31034 FDEF Torsion-Resistant Wind Turbine Cable Standard. Values for your order are confirmed in the datasheet and quotation.

Electrical

Rated voltage / operating system: 1.8/3 kV (0.6/1 kV) (GB/T 29631 & NB/T 31034 FDEF Torsion-Resistant Wind Turbine Cable Standard)
Core / conductor construction: GB/T 3956 Class 5 Flexible Copper Conductors — Oxygen-free plain or tinned flexible copper (1C, 3-5C or 6-37C)
Primary dielectric / insulation: EPR / Composite EPR Core Insulation (Code E) — High-dielectric ethylene-propylene rubber rated up to 1.8/3 kV

Thermal

Continuous operating temperature: −40…+90 °C (wind turbine nacelle, hub & tower duty)
Low-temperature torsion & cold bend: Verified cold-flex and torsion endurance across −40…+90 °C per GB/T 29631 & NB/T 31034 FDEF Torsion-Resistant Wind Turbine Cable Standard
Storage & transport temperature: −40…+80 °C on export wooden/steel cable drum

Mechanical

Outer jacket / sheath protection: Polychloroprene (CR) / CSM / CPE Sheath (Code F) — Cold- (-40 °C), oil- and torsion-resistant heavy rubber jacket
Minimum bending radius: 6 × OD
Intermediate screen / separator / core layer: EPR / Composite EPR Core Insulation (Code E) — High-dielectric ethylene-propylene rubber rated up to 1.8/3 kV

Resistance

Oil, grease, ozone & UV resistance: Resistant to wind turbine gearbox oil, hydraulic fluid, ozone and UV weathering per GB/T 29631 & NB/T 31034 FDEF Torsion-Resistant Wind Turbine Cable Standard
Flame retardancy & smoke/halogen emission: Flame-retardant and environmental performance verified per GB/T 29631 & NB/T 31034 FDEF Torsion-Resistant Wind Turbine Cable Standard
RoHS & REACH compliance: RoHS 2 (2011/65/EU + 2015/863) & REACH SVHC compliant

Reference standards

Governing standard: GB/T 29631 & NB/T 31034 FDEF Torsion-Resistant Wind Turbine Cable Standard
Conductor & flame/test standards: IEC 60228 / IEC 60332-1-2 & -3 / UL 2277 WTTC / EN 10204
Quality management & inspection: ISO 9001:2015 & EN 10204 3.1 factory routine inspection

Identification

Model designation: FDEF 1.8/3 kV
Sheath colour & metre marking: Continuous metre-marked black outer finish (Polychloroprene )
Customs tariff (HS): 8544.49 / 8544.60

Sizes

3 standard FDEF 1.8/3 kV wind turbine configurations

Manufactured to GB/T 29631 & NB/T 31034 FDEF Torsion-Resistant Wind Turbine Cable Standard for wind turbine yaw drip-loop, pitch control, tower power and converter applications.

Dimensions, tensile load & weights
Order designation	Configuration	Core / stranding	Outer Ø ≈ mm	Net weight ≈ kg/km	Max. pulling kN ≈	Min. bend R mm
FDEF 1.8/3 kV Construction Schedule (−40…+90 °C)
FDEF 1.8 1×95 / 4G25 Cu	1 × 95 mm² (or 4G25 mm² / 3/0 AWG)	IEC 60228 Class 5 Flexible Cu/SnCu	21.6	1,080	14.2	110
FDEF 1.8 1×185 / 4G50 Cu	1 × 185 mm² (or 4G50 mm² / 373 kcmil)	IEC 60228 Class 5 Flexible Cu/SnCu	27.8	1,960	27.5	140
FDEF 1.8 1×300 / 4G95 Cu	1 × 300 mm² (or 1×535/777 kcmil)	IEC 60228 Class 5 Flexible Cu/SnCu	34.6	3,120	45.0	175

Typical values for this cable type; dimensions and weights for your order are confirmed in the quotation.
Custom conductor cross-sections, core counts, pre-lugged tower kits and drum lengths available per GB/T 29631 & NB/T 31034 FDEF Torsion-Resistant Wind Turbine Cable Standard.

Electrical & thermal parameters
Configuration	Max. DC R₂₀ Ω/km	Rating / Impedance	Operating temp.
1 × 95 mm² (or 4G25 mm² / 3/0 AWG)	0.21	1.8/3 kV (0.6/1 kV) (320 A Cu)	−40…+90 °C
1 × 185 mm² (or 4G50 mm² / 373 kcmil)	0.11	1.8/3 kV (0.6/1 kV) (495 A Cu)	−40…+90 °C
1 × 300 mm² (or 1×535/777 kcmil)	0.06	1.8/3 kV (0.6/1 kV) (680 A Cu)	−40…+90 °C

Every production length undergoes routine conductor DC resistance, AC high-voltage spark/dielectric and dimensional verification.

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.

ConductorClass 5 stranding
Spark test100 % in-line
Lay-upCores, earth, fillers
SheathingInner, braid / screen, outer
Electrical testsAC voltage, resistance
DimensionsOD, wall thickness
Inspection documents & dispatchDrum & dispatch

Testing & inspection	Test value / reference	Frequency
Routine tests
Conductor DC resistance & dimensional verification (GB/T 29631 & NB/T 31034 FDEF Torsion-Resistant Wind Turbine Cable Standard)	DC resistance at 20 °C and insulation/sheath wall thickness within GB/T 29631 & NB/T 31034 FDEF Torsion-Resistant Wind Turbine Cable Standard limits	Every manufactured drum length
AC high-voltage dielectric & insulation resistance test (GB/T 29631 & NB/T 31034 FDEF Torsion-Resistant Wind Turbine Cable Standard)	Zero dielectric breakdown and verified insulation resistance for 1.8/3 kV (0.6/1 kV) rating	Every manufactured drum length
Sample tests
Low-temperature drip-loop torsion, oil & flame qualification (GB/T 29631 & NB/T 31034 FDEF Torsion-Resistant Wind Turbine Cable Standard)	Verified cold torsion cycle endurance, oil resistance and flame retardancy across −40…+90 °C	Type qualification & periodic lot audit

Inspection certificate

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

Product approvals

GB/T 29631 / NB/T 31034 CompliantEN 10204 3.1 Factory Test CertificateCE, RoHS 2 (2011/65/EU) & REACH

Company certificates

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

Marking & supply

Ordering & delivery

Sheath marking

TEBAOFLEX FDEF 1.8/3 kV GB/T 29631 / NB/T 31034 1.8/3 kV (0.6/1 kV) CE

Delivery form: Heavy-duty export fumigated wooden drums, steel reels or pre-cut wind turbine tower & drip-loop kits
Standard lengths: 500 m, 1,000 m or custom cut-to-length nacelle drip-loop and tower section sets
MOQ: 100 m (standard configurations) · 300 m (custom wind builds)
Lead time: 2–4 weeks ex-works
Incoterms: EXW, FCA, FOB, CIF, DAP

Technical documents

Downloads

PDFFDEF 1.8/3 kV (0.6/1 kV) GB/T 29631 & NB/T 31034 EPR/CR Torsion-Resistant Wind Power Cable – technical datasheet3 configurations · 3-layer construction, technical data, approvals XLSXFDEF 1.8/3 kV spec data (Excel)All 3 configurations with dimensions and ratings, for your BOM or quotation

Revision: 2026-10-27
Updated: 2026-10-27

FAQ

Questions engineers ask first

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

What governing standard and construction define FDEF 1.8/3 kV (FDEF 1.8/3 kV (0.6/1 kV) GB/T 29631 & NB/T 31034 EPR/CR Torsion-Resistant Wind Power Cable)?

FDEF 1.8/3 kV (FDEF 1.8/3 kV (0.6/1 kV) GB/T 29631 & NB/T 31034 EPR/CR Torsion-Resistant Wind Power Cable) is manufactured in accordance with GB/T 29631 & NB/T 31034 FDEF Torsion-Resistant Wind Turbine Cable Standard for 1.8/3 kV (0.6/1 kV) wind turbine service over -40 to +90 °C. Its 3-layer construction comprises gb/t 3956 class 5 flexible copper conductors, epr / composite epr core insulation (code e) and polychloroprene (cr) / csm / cpe sheath (code f).

What is the minimum bending radius and operating temperature range for FDEF 1.8/3 kV?

The minimum bending radius for FDEF 1.8/3 kV is 6 × OD across its continuous operating temperature range of -40 to +90 °C, ensuring mechanical torsion resistance and dielectric reliability in wind turbine nacelles, hubs and towers.

How are the concentric layers of FDEF 1.8/3 kV arranged from inside to outside?

From inside to outside, the construction sequence is: (01) GB/T 3956 Class 5 Flexible Copper Conductors — Oxygen-free plain or tinned flexible copper (1C, 3-5C or 6-37C); (02) EPR / Composite EPR Core Insulation (Code E) — High-dielectric ethylene-propylene rubber rated up to 1.8/3 kV; (03) Polychloroprene (CR) / CSM / CPE Sheath (Code F) — Cold- (-40 °C), oil- and torsion-resistant heavy rubber jacket.

What factory test certificates are supplied with FDEF 1.8/3 kV?

Every production drum of FDEF 1.8/3 kV undergoes routine conductor DC resistance, AC high-voltage dielectric and dimensional testing per GB/T 29631 & NB/T 31034 FDEF Torsion-Resistant Wind Turbine Cable Standard, and is delivered with an EN 10204 3.1 factory test certificate.

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01Selected sizes

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03Message for our engineers

FDEF 1.8/3 kV (0.6/1 kV) GB/T 29631 & NB/T 31034 EPR/CR Torsion-Resistant Wind Power Cable

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