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Product

EMC-shielded wind turbine converter & VFD drive cable UL 2277 WTTC / UL 44 RHW-21,000 V WTTC / 2,000 V RHW-2 (-40 toCold & Sunlight-Resistant Heavy Poly

Symmetrical-Ground 1,000 V UL WTTC / 2,000 V UL RHW-2 (3 Phase + 3 Split Grounds) Dual Copper-Tape Wind VFD CableUL 2277 WTTC / UL 44 RHW-2 — 1,000 V WTTC / 2,000 V RHW-2 — -40 to +90 °C Wind Turbine Cable

Symmetrical-Ground 1,000 V UL WTTC / 2,000 V UL RHW-2 (3 Phase + 3 Split Grounds) Dual Copper-Tape Wind VFD Cable (UL 2277 WTTC / UL 44 RHW-2, 1,000 V WTTC / 2,000 V RHW-2, -40 to +90 °C, min. bend radius 8 × OD).

Anti-torsion braid

EMC screen

Oil-resistant

Approved

Configuration

Order designation: Symmetrical-Ground 1kV WTTC 4G16 / 3×16+3G2.5
Outer Ø ≈: 21.8 mm
Net weight ≈: 790 kg/km
Max. pulling ≈: 9.5 kN
Core / stranding: IEC 60228 Class 5 / Class K Cu

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: 1,000 V WTTC / 2
Operating temp.: −40…+90 °C
Min. bend radius: 8 × OD
Core / conductor: XHHW-2 / RHW-2 P
Outer protection: Cold & Sunlight-
Standard: UL 2277 WTTC / U

Typical values for this cable type, based on UL Subject 2277 WTTC 1,000 V & UL 44 RHW-2 2,000 V Symmetrical 3+3 Dual Cu-Tape VFD Specification — confirmed in the datasheet and quotation for your order.

Application fit

Is Symmetrical-Ground 1kV WTTC / 2kV VFD right for your machine?

VFD inverter to AC motor screened feeder

Suitable

Symmetrical 3+3 split grounds or 100% foil + 85% tinned copper braid shield give a low-impedance return path for PWM drive currents.

Motor stator, traction & converter leads

Suitable

Extra-thick 2XL XLPE / RHW-2 insulation withstands high dV/dt voltage spikes and corona discharge from IGBT wind converters.

Free-hanging vertical run

Suitable

Class 5 / Class K flexible copper conductors and −40 °C TPE/CPE/PVC jackets handle nacelle vibration, tray routing and drip-loop torsion.

Fixed installation

Suitable

Dual-listed to UL Subject 2277 Type WTTC (1,000 V), UL 1277 TC-ER (600 V) and UL 44 RHW-2 (2,000 V) for raceway-free nacelle installation.

Motorised monospiral reel

Not suitable

Wind converter VFD feeder cable is not designed for continuous mobile reeling drums.

Use Spreader Reel Cable

Typical machinesRenewable Energy & EV ChargingWind Turbine Main Power Converter & Generator DrivesElectric Yaw Drive & Blade Pitch Servo VFD MotorsNacelle Hydraulic Pump, Cooling Fan & Auxiliary VFDsUL 2277 WTTC 1,000 V & 2,000 V Renewable Drive Systems

Construction

Layer by layer

Shown: Symmetrical-Ground 1kV WTTC / 2kV VFD (UL Subject 2277 WTTC 1,000 V & UL 44 RHW-2 2,000 V Symmetrical 3+3 Dual Cu-Tape VFD Specification) featuring xhhw-2 / rhw-2 phase conductors (3 cores), symmetrical tri-sectional grounds (3 cores) and cold & sunlight-resistant heavy polymer jacket (4-layer construction).

Schematic, not to scale — generated from the layer data

#	Layer	Material & reference
1	XHHW-2 / RHW-2 Phase Conductors (3 Cores	Flexible stranded copper phase cores (14 AWG to 500 kcmil)
2	Symmetrical Tri-Sectional Grounds (3 Cor	Three balanced interstitial ground cores canceling common-mode voltage
3	Dual Helical Copper Tape EMC Shield (100	Two overlapping copper tapes providing low-impedance EMI return path
4	Cold & Sunlight-Resistant Heavy Polymer	UL WTTC 1,000 V & RHW-2 2,000 V wind converter drive sheath

Symmetrical-Ground 1kV WTTC / 2kV VFD — Standard Wind Turbine Execution

Built to UL Subject 2277 WTTC 1,000 V & UL 44 RHW-2 2,000 V Symmetrical 3+3 Dual Cu-Tape VFD Specification with xhhw-2 / rhw-2 phase conductors (3 cores) and cold & sunlight-resistant heavy polymer jacket

Symmetrical-Ground 1kV WTTC / 2kV VFD — Pre-Cut Tower / Drip-Loop Kit

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

Symmetrical-Ground 1kV WTTC / 2kV VFD — 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 Subject 2277 WTTC 1,000 V & UL 44 RHW-2 2,000 V Symmetrical 3+3 Dual Cu-Tape VFD Specification. Values for your order are confirmed in the datasheet and quotation.

Electrical

Rated voltage / operating system: 1,000 V WTTC / 2,000 V RHW-2 (UL Subject 2277 WTTC 1,000 V & UL 44 RHW-2 2,000 V Symmetrical 3+3 Dual Cu-Tape VFD Specification)
Core / conductor construction: XHHW-2 / RHW-2 Phase Conductors (3 Cores) — Flexible stranded copper phase cores (14 AWG to 500 kcmil)
Primary dielectric / insulation: Symmetrical Tri-Sectional Grounds (3 Cores) — Three balanced interstitial ground cores canceling common-mode voltage

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 Subject 2277 WTTC 1,000 V & UL 44 RHW-2 2,000 V Symmetrical 3+3 Dual Cu-Tape VFD Specification
Storage & transport temperature: −40…+80 °C on export wooden/steel cable drum

Mechanical

Outer jacket / sheath protection: Cold & Sunlight-Resistant Heavy Polymer Jacket — UL WTTC 1,000 V & RHW-2 2,000 V wind converter drive sheath
Minimum bending radius: 8 × OD
Intermediate screen / separator / core layer: Dual Helical Copper Tape EMC Shield (100%) — Two overlapping copper tapes providing low-impedance EMI return path

Resistance

Oil, grease, ozone & UV resistance: Resistant to wind turbine gearbox oil, hydraulic fluid, ozone and UV weathering per UL Subject 2277 WTTC 1,000 V & UL 44 RHW-2 2,000 V Symmetrical 3+3 Dual Cu-Tape VFD Specification
Flame retardancy & smoke/halogen emission: Flame-retardant and environmental performance verified per UL Subject 2277 WTTC 1,000 V & UL 44 RHW-2 2,000 V Symmetrical 3+3 Dual Cu-Tape VFD Specification
RoHS & REACH compliance: RoHS 2 (2011/65/EU + 2015/863) & REACH SVHC compliant

Reference standards

Governing standard: UL Subject 2277 WTTC 1,000 V & UL 44 RHW-2 2,000 V Symmetrical 3+3 Dual Cu-Tape VFD 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: Symmetrical-Ground 1kV WTTC / 2kV VFD
Sheath colour & metre marking: Continuous metre-marked black outer finish (Cold & Sunlight-)
Customs tariff (HS): 8544.49 / 8544.60

Sizes

3 standard Symmetrical-Ground 1kV WTTC / 2kV VFD wind turbine configurations

Manufactured to UL Subject 2277 WTTC 1,000 V & UL 44 RHW-2 2,000 V Symmetrical 3+3 Dual Cu-Tape VFD 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
Symmetrical-Ground 1kV WTTC / 2kV VFD Construction Schedule (−40…+90 °C)
Symmetrical-Ground 1kV WTTC 4G16 / 3×16+3G2.5	4G16 mm² (or 3×6 AWG + 3G10 AWG)	IEC 60228 Class 5 / Class K Cu	21.8	790	9.5	130
Symmetrical-Ground 1kV WTTC 4G50 / 3×50+3G10	4G50 mm² (or 3×1 AWG + 3G6 AWG)	IEC 60228 Class 5 / Class K Cu	31.4	2,140	22.5	190
Symmetrical-Ground 1kV WTTC 3×150+3G25 VFD	3×150 + 3G25 mm² (or 3×350 kcmil)	IEC 60228 Class 5 / Class K Cu	47.2	5,480	58.0	285

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 Subject 2277 WTTC 1,000 V & UL 44 RHW-2 2,000 V Symmetrical 3+3 Dual Cu-Tape VFD Specification.

Electrical & thermal parameters
Configuration	Max. DC R₂₀ Ω/km	Rating / Impedance	Operating temp.
4G16 mm² (or 3×6 AWG + 3G10 AWG)	1.15	1,000 V WTTC / 2,000 V RHW-2 (98 A VFD)	−40…+90 °C
4G50 mm² (or 3×1 AWG + 3G6 AWG)	0.39	1,000 V WTTC / 2,000 V RHW-2 (195 A VFD)	−40…+90 °C
3×150 + 3G25 mm² (or 3×350 kcmil)	0.13	1,000 V WTTC / 2,000 V RHW-2 (395 A VFD)	−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 Subject 2277 WTTC 1,000 V & UL 44 RHW-2 2,000 V Symmetrical 3+3 Dual Cu-Tape VFD Specification)	DC resistance at 20 °C and insulation/sheath wall thickness within UL Subject 2277 WTTC 1,000 V & UL 44 RHW-2 2,000 V Symmetrical 3+3 Dual Cu-Tape VFD Specification limits	Every manufactured drum length
AC high-voltage dielectric & insulation resistance test (UL Subject 2277 WTTC 1,000 V & UL 44 RHW-2 2,000 V Symmetrical 3+3 Dual Cu-Tape VFD Specification)	Zero dielectric breakdown and verified insulation resistance for 1,000 V WTTC / 2,000 V RHW-2 rating	Every manufactured drum length
Sample tests
Low-temperature drip-loop torsion, oil & flame qualification (UL Subject 2277 WTTC 1,000 V & UL 44 RHW-2 2,000 V Symmetrical 3+3 Dual Cu-Tape VFD 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 Symmetrical-Ground 1kV WTTC / 2kV VFD UL 2277 WTTC / UL 44 RHW-2 1,000 V WTTC / 2,000 V RHW-2 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

PDFSymmetrical-Ground 1,000 V UL WTTC / 2,000 V UL RHW-2 (3 Phase + 3 Split Grounds) Dual Copper-Tape Wind VFD Cable – technical datasheet3 configurations · 4-layer construction, technical data, approvals XLSXSymmetrical-Ground 1kV WTTC / 2kV VFD 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 Symmetrical-Ground 1kV WTTC / 2kV VFD (Symmetrical-Ground 1,000 V UL WTTC / 2,000 V UL RHW-2 (3 Phase + 3 Split Grounds) Dual Copper-Tape Wind VFD Cable)?

Symmetrical-Ground 1kV WTTC / 2kV VFD (Symmetrical-Ground 1,000 V UL WTTC / 2,000 V UL RHW-2 (3 Phase + 3 Split Grounds) Dual Copper-Tape Wind VFD Cable) is manufactured in accordance with UL Subject 2277 WTTC 1,000 V & UL 44 RHW-2 2,000 V Symmetrical 3+3 Dual Cu-Tape VFD Specification for 1,000 V WTTC / 2,000 V RHW-2 wind turbine service over -40 to +90 °C. Its 4-layer construction comprises xhhw-2 / rhw-2 phase conductors (3 cores), symmetrical tri-sectional grounds (3 cores) and cold & sunlight-resistant heavy polymer jacket.

What is the minimum bending radius and operating temperature range for Symmetrical-Ground 1kV WTTC / 2kV VFD?

The minimum bending radius for Symmetrical-Ground 1kV WTTC / 2kV VFD is 8 × 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 Symmetrical-Ground 1kV WTTC / 2kV VFD arranged from inside to outside?

From inside to outside, the construction sequence is: (01) XHHW-2 / RHW-2 Phase Conductors (3 Cores) — Flexible stranded copper phase cores (14 AWG to 500 kcmil); (02) Symmetrical Tri-Sectional Grounds (3 Cores) — Three balanced interstitial ground cores canceling common-mode voltage; (03) Dual Helical Copper Tape EMC Shield (100%) — Two overlapping copper tapes providing low-impedance EMI return path; (04) Cold & Sunlight-Resistant Heavy Polymer Jacket — UL WTTC 1,000 V & RHW-2 2,000 V wind converter drive sheath.

What factory test certificates are supplied with Symmetrical-Ground 1kV WTTC / 2kV VFD?

Every production drum of Symmetrical-Ground 1kV WTTC / 2kV VFD undergoes routine conductor DC resistance, AC high-voltage dielectric and dimensional testing per UL Subject 2277 WTTC 1,000 V & UL 44 RHW-2 2,000 V Symmetrical 3+3 Dual Cu-Tape VFD Specification, and is delivered with an EN 10204 3.1 factory test certificate.

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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

Symmetrical-Ground 1kV WTTC / 2kV VFD Symmetrical-Ground 1,000 V UL WTTC / 2,000 V UL RHW-2 (3 Phase + 3 Split Grounds) Dual Copper-Tape Wind VFD 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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