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Product

wind turbine tower, DLO & blade grounding power cable UL 2277 WTTC / UL 44 RHW-22,000 V / 1,000 V (-40 to +90 °C)Heavy-Duty Cold-Resistant CPE Jacket

DLO 2,000 V (UL 44 RHH/RHW-2) & 1,000 V (UL 2277 WTTC) EPDM/CPE Wind Turbine Torsion Power CableUL 2277 WTTC / UL 44 RHW-2 — 2,000 V / 1,000 V — -40 to +90 °C Wind Turbine Cable

DLO 2,000 V (UL 44 RHH/RHW-2) & 1,000 V (UL 2277 WTTC) EPDM/CPE Wind Turbine Torsion Power Cable (UL 2277 WTTC / UL 44 RHW-2) engineered for 2,000 V / 1,000 V wind turbine service across -40 to +90 °C (min. bend radius 6 × OD).

Anti-torsion braid

Flame-retardant

Oil-resistant

Approved

Configuration

Order designation: DLO 2000V 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: 2,000 V / 1,000
Operating temp.: −40…+90 °C
Min. bend radius: 6 × OD
Core / conductor: High-Flex Tinned
Outer protection: Heavy-Duty Cold-
Standard: UL 2277 WTTC / U

Typical values for this cable type, based on UL 2277 Type WTTC (1,000 V) & UL 44 RHH/RHW-2 (2,000 V) Wind Torsion Specification — confirmed in the datasheet and quotation for your order.

Application fit

Is DLO 2000V / 1kV WTTC right for your machine?

Fixed installation

Suitable

Compacted Class 2 aluminum or Class 5/K copper conductors with XLPE/EPR/HEPR insulation install cleanly in vertical tower cleats and trays

Free-hanging vertical run

Suitable

Flexible DLO 2 kV, WTTC 1 kV and blade grounding builds absorb nacelle yaw loop torsion and rotor blade flexing down to −40 °C.

Switchgear & control cabinet wiring

Suitable

NSGAFOU 1.8/3 kV short-circuit-proof and UL WTTC/RHW-2 feeders wire directly into nacelle converter cabinets and tower base switchgear.

Offshore platform & shipboard deck trays

Suitable

Heavy-duty CPE, HM4/HFFR LSZH and 5GM3 polychloroprene jackets resist turbine hydraulic oil, condensation, salt spray and UV.

Energy chain / drag chain

Not suitable

Wind tower power feeders and large-cross-section DLO cables are not intended for high-cycle factory drag chains.

Use Drag-Chain Servo Cable

Typical machinesRenewable Energy & EV ChargingWind Turbine Tower Vertical Power Feeders (Cu & Al)North American UL 2277 WTTC & 2 kV DLO Wind TurbinesIEC 61400-24 Wind Blade Lightning Down-ConductorsNacelle Converter Busbars & Transformer Interconnects

Construction

Layer by layer

Shown: DLO 2000V / 1kV WTTC (UL 2277 Type WTTC (1,000 V) & UL 44 RHH/RHW-2 (2,000 V) Wind Torsion Specification) featuring high-flex tinned/bare copper (14 awg-1111 kcmil), 2000v dlo / 1kv wttc epdm/epr insulation and heavy-duty cold-resistant cpe jacket (-40 °c) (3-layer construction).

Schematic, not to scale — generated from the layer data

#	Layer	Material & reference
1	High-Flex Tinned/Bare Copper (14 AWG-111	Rope-lay finely stranded copper conductor for wind drip loops
2	2000V DLO / 1kV WTTC EPDM/EPR Insulation	High-dielectric thermoset rubber passing UL 2277 & UL 44
3	Heavy-Duty Cold-Resistant CPE Jacket (-4	Abrasion- and oil-resistant CPE sheath tested to 10,000 torsion cycles

DLO 2000V / 1kV WTTC — Standard Wind Turbine Execution

Built to UL 2277 Type WTTC (1,000 V) & UL 44 RHH/RHW-2 (2,000 V) Wind Torsion Specification with high-flex tinned/bare copper (14 awg-1111 kcmil) and heavy-duty cold-resistant cpe jacket (-40 °c)

DLO 2000V / 1kV WTTC — Pre-Cut Tower / Drip-Loop Kit

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

DLO 2000V / 1kV WTTC — 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 UL 2277 Type WTTC (1,000 V) & UL 44 RHH/RHW-2 (2,000 V) Wind Torsion Specification. Values for your order are confirmed in the datasheet and quotation.

Electrical

Rated voltage / operating system: 2,000 V / 1,000 V (UL 2277 Type WTTC (1,000 V) & UL 44 RHH/RHW-2 (2,000 V) Wind Torsion Specification)
Core / conductor construction: High-Flex Tinned/Bare Copper (14 AWG-1111 kcmil) — Rope-lay finely stranded copper conductor for wind drip loops
Primary dielectric / insulation: 2000V DLO / 1kV WTTC EPDM/EPR Insulation — High-dielectric thermoset rubber passing UL 2277 & UL 44

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 UL 2277 Type WTTC (1,000 V) & UL 44 RHH/RHW-2 (2,000 V) Wind Torsion Specification
Storage & transport temperature: −40…+80 °C on export wooden/steel cable drum

Mechanical

Outer jacket / sheath protection: Heavy-Duty Cold-Resistant CPE Jacket (-40 °C) — Abrasion- and oil-resistant CPE sheath tested to 10,000 torsion cycles
Minimum bending radius: 6 × OD
Intermediate screen / separator / core layer: 2000V DLO / 1kV WTTC EPDM/EPR Insulation — High-dielectric thermoset rubber passing UL 2277 & UL 44

Resistance

Oil, grease, ozone & UV resistance: Resistant to wind turbine gearbox oil, hydraulic fluid, ozone and UV weathering per UL 2277 Type WTTC (1,000 V) & UL 44 RHH/RHW-2 (2,000 V) Wind Torsion Specification
Flame retardancy & smoke/halogen emission: Flame-retardant and environmental performance verified per UL 2277 Type WTTC (1,000 V) & UL 44 RHH/RHW-2 (2,000 V) Wind Torsion Specification
RoHS & REACH compliance: RoHS 2 (2011/65/EU + 2015/863) & REACH SVHC compliant

Reference standards

Governing standard: UL 2277 Type WTTC (1,000 V) & UL 44 RHH/RHW-2 (2,000 V) Wind Torsion Specification
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: DLO 2000V / 1kV WTTC
Sheath colour & metre marking: Continuous metre-marked black outer finish (Heavy-Duty Cold-)
Customs tariff (HS): 8544.49 / 8544.60

Sizes

3 standard DLO 2000V / 1kV WTTC wind turbine configurations

Manufactured to UL 2277 Type WTTC (1,000 V) & UL 44 RHH/RHW-2 (2,000 V) Wind Torsion Specification 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
DLO 2000V / 1kV WTTC Construction Schedule (−40…+90 °C)
DLO 2000V 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
DLO 2000V 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
DLO 2000V 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 UL 2277 Type WTTC (1,000 V) & UL 44 RHH/RHW-2 (2,000 V) Wind Torsion Specification.

Electrical & thermal parameters
Configuration	Max. DC R₂₀ Ω/km	Rating / Impedance	Operating temp.
1 × 95 mm² (or 4G25 mm² / 3/0 AWG)	0.21	2,000 V / 1,000 V (320 A Cu)	−40…+90 °C
1 × 185 mm² (or 4G50 mm² / 373 kcmil)	0.11	2,000 V / 1,000 V (495 A Cu)	−40…+90 °C
1 × 300 mm² (or 1×535/777 kcmil)	0.06	2,000 V / 1,000 V (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 (UL 2277 Type WTTC (1,000 V) & UL 44 RHH/RHW-2 (2,000 V) Wind Torsion Specification)	DC resistance at 20 °C and insulation/sheath wall thickness within UL 2277 Type WTTC (1,000 V) & UL 44 RHH/RHW-2 (2,000 V) Wind Torsion Specification limits	Every manufactured drum length
AC high-voltage dielectric & insulation resistance test (UL 2277 Type WTTC (1,000 V) & UL 44 RHH/RHW-2 (2,000 V) Wind Torsion Specification)	Zero dielectric breakdown and verified insulation resistance for 2,000 V / 1,000 V rating	Every manufactured drum length
Sample tests
Low-temperature drip-loop torsion, oil & flame qualification (UL 2277 Type WTTC (1,000 V) & UL 44 RHH/RHW-2 (2,000 V) Wind Torsion Specification)	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

UL 2277 WTTC / UL 44 RHW-2 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 DLO 2000V / 1kV WTTC UL 2277 WTTC / UL 44 RHW-2 2,000 V / 1,000 V 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

PDFDLO 2,000 V (UL 44 RHH/RHW-2) & 1,000 V (UL 2277 WTTC) EPDM/CPE Wind Turbine Torsion Power Cable – technical datasheet3 configurations · 3-layer construction, technical data, approvals XLSXDLO 2000V / 1kV WTTC 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 DLO 2000V / 1kV WTTC (DLO 2,000 V (UL 44 RHH/RHW-2) & 1,000 V (UL 2277 WTTC) EPDM/CPE Wind Turbine Torsion Power Cable)?

DLO 2000V / 1kV WTTC (DLO 2,000 V (UL 44 RHH/RHW-2) & 1,000 V (UL 2277 WTTC) EPDM/CPE Wind Turbine Torsion Power Cable) is manufactured in accordance with UL 2277 Type WTTC (1,000 V) & UL 44 RHH/RHW-2 (2,000 V) Wind Torsion Specification for 2,000 V / 1,000 V wind turbine service over -40 to +90 °C. Its 3-layer construction comprises high-flex tinned/bare copper (14 awg-1111 kcmil), 2000v dlo / 1kv wttc epdm/epr insulation and heavy-duty cold-resistant cpe jacket (-40 °c).

What is the minimum bending radius and operating temperature range for DLO 2000V / 1kV WTTC?

The minimum bending radius for DLO 2000V / 1kV WTTC 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 DLO 2000V / 1kV WTTC arranged from inside to outside?

From inside to outside, the construction sequence is: (01) High-Flex Tinned/Bare Copper (14 AWG-1111 kcmil) — Rope-lay finely stranded copper conductor for wind drip loops; (02) 2000V DLO / 1kV WTTC EPDM/EPR Insulation — High-dielectric thermoset rubber passing UL 2277 & UL 44; (03) Heavy-Duty Cold-Resistant CPE Jacket (-40 °C) — Abrasion- and oil-resistant CPE sheath tested to 10,000 torsion cycles.

What factory test certificates are supplied with DLO 2000V / 1kV WTTC?

Every production drum of DLO 2000V / 1kV WTTC undergoes routine conductor DC resistance, AC high-voltage dielectric and dimensional testing per UL 2277 Type WTTC (1,000 V) & UL 44 RHH/RHW-2 (2,000 V) Wind Torsion Specification, and is delivered with an EN 10204 3.1 factory test certificate.

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Your selection and application details are copied into the enquiry form below.

01Selected sizes

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02Reel & motion

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Reel typeDrum core diameter (mm)Cable length on drum (m)Travel speed (m/min)Max. accelerationCycles per hourLength and quantityAmbient temperatureExposure (outdoor, water, oil, abrasion)Destination countryEquipment and operating conditions

03Message for our engineers

DLO 2000V / 1kV WTTC DLO 2,000 V (UL 44 RHH/RHW-2) & 1,000 V (UL 2277 WTTC) EPDM/CPE Wind Turbine Torsion Power Cable

Selected sizes:


Reel & motion:
- Reel type: 
- Drum core diameter (mm): 
- Cable length on drum (m): 
- Travel speed (m/min): 
- Max. acceleration: 
- Cycles per hour: 
- Length and quantity: 
- Ambient temperature: 
- Exposure (outdoor, water, oil, abrasion): 
- Destination country: 
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