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Product

HVWW 3.3–13.8 kV submersible motor magnet wire3.3 kV – 13.8 kV ACWater / Glycol ImmersedXLPE-PA / PP / PEEK

HVWW High-Voltage Wet-Winding Submersible Motor Magnet Wire3.3 kV to 13.8 kV AC water/glycol-immersed submersible motor stator magnet wire (XLPE/PA

High-voltage wet-winding submersible motor magnet wire (HVWW) rated 3.3 kV, 4.16 kV, 6.6 kV, 11 kV and 13.8 kV AC for water-glycol and dielectric-oil filled deep-well, mine-dewatering, offshore seawater-lift and subsea multiphase pump motors, engineered.

Water-resistant
Flame-retardant
Oil-resistant
Approved
Order designation
HVWW-XLPA-3.55-6.6KV
Motor voltage
6.6 kV AC
Insulation
TR-XLPE + PA Skin (+90°C)
Nominal OD
7.05 mm
Water AC test
18 kV AC
All sizes (12)
Request a quoteDatasheetWhatsApp
Engineering reply in 2 business hoursCut-to-length export drumsEN 10204 3.1 certificate per drum
Motor voltage
3.3 – 13.8 kV AC
Up to 15 kV class wet-winding stators
Conductor
Solid & Class 2
Ø 1.80 mm to 6.50 mm / 6–50 mm²
Insulation sys
XLPE / PP / PEEK
With PA nylon skin or semicon screen
Water temp
+75 to +180 °C
PE2-PA +75°C · XLPE +90°C · PEEK +180°C
Hydrostatic P
Up to 400 bar
Deep-well, mine & subsea motors
Dielectric test
12 kV – 35 kV AC
24 h water-bath routine hipot

Typical values for this cable type, based on IEC 60034-18-42 / NEMA MG 1 / DIN 46399 / API RP 11S4 — confirmed in the datasheet and quotation for your order.

Application fit

Is HVWW right for your machine?

Allows 3.3 kV to 13.8 kV submersible pump, thruster and subsea compressor motors to run directly cooled by internal water/glycol or oil without canned-stator losses.

Immersion & wet locations

Suitable

Directly immersed in de-ionized water + propylene glycol inside wet-wound stator slots at hydrostatic pressures up to 400 bar.

Motor stator, traction & converter leads

Suitable

Tough polyamide (PA) outer gliding skin or PEEK wall resists stator slot-wedge abrasion during pull-in coil winding.

VFD inverter to AC motor screened feeder

Suitable

6.6–13.8 kV HVWW-SC grades incorporate inner and outer semiconductive layers that eliminate slot corona under VFD dv/dt.

Drilling jumbo & rotary mast feed

Suitable

PEEK-insulated HVWW-PK grades operate up to +180 °C in deep geothermal, SAGD and subsea ESP pump motors.

Typical machinesDeep-Mine Dewatering & Shaft-Sinking Submersible Pumps (3.3–11 kV)Offshore Platform Seawater-Lift & Firewater Caisson PumpsSubsea Multiphase Boosting, Injection & Dredging MotorsMunicipal Deep-Well Aquifer & Cavern Storage PumpsHigh-Temperature Geothermal & ESP Downhole Motors (PEEK)

Construction

Layer by layer

Representative 6.6–11 kV wet-winding build: Solid round (Ø 2.0–5.5 mm) or compacted Class 2 stranded (6–50 mm²) oxygen-free copper conductor + inner semiconductive conductor screen + thick water-tree-retardant cross-linked polyethylene (TR-XLPE), polypropylene (PP) or PEEK HV dielectric + outer semiconductive slot-potential equalizing layer or tough Polyamide (PA) mechanical gliding overcoat.

1234
Schematic, not to scale — generated from the layer data
#LayerMaterial & reference
1Solid round or compacted Class 2 oxygen-free copper (Cu-ETP1 / Cu-OF)Precision-shaved ultra-smooth solid copper rod (Ø 1.80 to 5.50 mm) or compacted 7/19-wire concentric Class 2 strand (6.0 to 50 mm²) free of surface burrsEliminates microscopic copper projections that would initiate electrical or water trees under 3.3–13.8 kV AC wet stress
2Inner semiconductive stress-smoothing barrier (HVWW-SC ≥ 6.0 kV)Co-extruded semiconductive polyolefin/fluoropolymer layer bonded over the copper conductorPrevents water-vapor micro-voids at the conductor interface and lowers peak radial electric field stress (kV/mm)
3Tree-Retardant XLPE (TR-XLPE), Polypropylene (PP) or PEEK HV wallTriple-clean HV dielectric tailored to thermal class: TR-XLPE or copolymer PP for +90 °C water-glycol motors, or ultra-high-crystallinity PEEK for +180 °C geothermal/subsea oil-/water-filled motorsWithstands continuous 3.3 kV to 13.8 kV AC phase-to-ground wet immersion with ultra-low water absorption and high impulse breakdown
4Polyamide (PA) gliding skin or outer semiconductive slot screenAbrasion-resistant Polyamide (Nylon 12/612) mechanical overcoat on 3.3–6.6 kV grades, or co-extruded semiconductive slot-potential screen on 6.6–13.8 kV corona-free stator buildsAllows low-friction pull-through into narrow laminated stator slots and clamps the outer surface to grounded stator iron potential

HVWW-XLPA / PP (+90 °C, 3.3 kV – 6.6 kV Water-Glycol Stators)

Water-tree-retardant XLPE or Polypropylene HV insulation with tough Polyamide (PA) outer gliding skin for mine dewatering & offshore seawater-lift motors

HVWW-SC (6.6 kV – 13.8 kV Dual-Semicon Corona-Free HV Stators)

Triple-extruded inner semicon + HV TR-XLPE/EPR + outer semiconductive slot-equalizing screen for 6.6 kV, 11 kV and 13.8 kV wet-wound motors

HVWW-PEEK (+180 °C, 3.3 kV – 10 kV Geothermal / Subsea ESP Motors)

Extruded virgin Polyetheretherketone (PEEK) insulation for +180 °C / 400 bar hot-brine, H2S and downhole oil/water submersible motors

Technical data

Ratings & operating limits

Typical values: Typical values for this cable type, based on IEC 60034-18-42 / NEMA MG 1 / DIN 46399 / API RP 11S4. Values for your order are confirmed in the datasheet and quotation.

Electrical

Rated motor stator voltage (U_N)
3.3 kV, 4.16 kV, 6.0 / 6.6 kV, 10 / 11 kV & 13.8 kV AC
Routine 24-hour water-tank AC hipot
3.3 kV: 10 kV AC · 6.6 kV: 18 kV AC · 11 kV: 28 kV AC · 13.8 kV: 35 kV AC
DC spark test (in-line)
25 kV to 50 kV DC 100 % dry spark test
Insulation resistance (in +20 °C water)
≥ 5,000 MΩ·km

Thermal

Max continuous water/glycol temp
+75 °C (PE2-PA) · +90 °C (TR-XLPE / PP) · +180 °C (PEEK)
Low-temperature handling
Down to −30 °C

Mechanical

Solid copper diameters
Ø 1.80 mm to Ø 5.50 mm (DIN 46399 / IEC 60317)
Stranded copper cross-sections
6, 10, 16, 25, 35 & 50 mm² compacted Class 2
Min. coil-forming bend radius
4 × OD (solid / PEEK) · 5 × OD (HV triple-extruded)

Resistance

Coolant & fluid compatibility
De-ionized water + glycol, potable/mine water, synthetic ester & mineral oil
Hydrostatic pressure rating
Up to 100 bar (standard) · up to 400 bar (subsea / PEEK)

Reference standards

Design & test standards
DIN 46399 · IEC 60034-18-42 · IEEE Std 1776 · NEMA MG 1
Environmental compliance
RoHS 2011/65/EU, (EU) 2015/863 & REACH compliant

Identification

Outer colour
Translucent Natural/Blue (XLPE-PA), Matte Black (Semicon HVWW-SC), Tan (PEEK)
Customs tariff (HS)
8544.11 / 8544.60

Sizes

12 standard HVWW 3.3 kV – 13.8 kV wet-winding submersible motor magnet wire builds

Covers solid and compacted stranded conductors across TR-XLPE/PA, Dual-Semicon HVWW-SC, and +180 °C PEEK insulation systems.

Motor kV, conductor Ø/mm², insulation wall, OD & AC test
Order designationConductor Ø / AreaInsulation SystemMotor U_N
kV AC		Total Wall
mm		Nom. OD
mm		Water Test
kV AC		Weight
kg/km		Enquiry
3.3 kV to 6.6 kV AC TR-XLPE / Polyamide (XLPE-PA) & +180 °C PEEK Wet-Winding Wires
HVWW-XLPA-2.50-3.3KVØ 2.50 mm Solid Cu (4.91 mm²)TR-XLPE + PA Skin (+90°C)3.31.154.801056
HVWW-XLPA-3.15-3.3KVØ 3.15 mm Solid Cu (7.79 mm²)TR-XLPE + PA Skin (+90°C)3.31.205.551085
HVWW-XLPA-3.55-6.6KVØ 3.55 mm Solid Cu (9.90 mm²)TR-XLPE + PA Skin (+90°C)6.61.757.0518118
HVWW-XLPA-10MM2-6.6KV10 mm² Class 2 Stranded (Ø 3.9)TR-XLPE + PA Skin (+90°C)6.61.857.6018126
HVWW-PEEK-2.80-4.2KVØ 2.80 mm Solid Cu (6.16 mm²)Virgin PEEK (+180°C)4.20.904.601269
HVWW-PEEK-3.55-6.6KVØ 3.55 mm Solid Cu (9.90 mm²)Virgin PEEK (+180°C)6.61.256.0518112
6.6 kV to 13.8 kV AC Dual-Semicon Corona-Shielded (HVWW-SC) Wet-Winding Stator Cables
HVWW-SC-10MM2-6.6KV10 mm² Class 2 Stranded (Ø 3.9)Semicon + TR-XLPE + Semicon6.62.308.5018145
HVWW-SC-16MM2-6.6KV16 mm² Class 2 Stranded (Ø 4.9)Semicon + TR-XLPE + Semicon6.62.309.5018205
HVWW-SC-16MM2-11KV16 mm² Class 2 Stranded (Ø 4.9)Semicon + TR-XLPE + Semicon11.03.4011.7028252
HVWW-SC-25MM2-11KV25 mm² Class 2 Stranded (Ø 6.1)Semicon + TR-XLPE + Semicon11.03.4012.9028355
HVWW-SC-25MM2-13.8KV25 mm² Class 2 Stranded (Ø 6.1)Semicon + TR-XLPE + Semicon13.84.1014.3035398
HVWW-SC-35MM2-13.8KV35 mm² Class 2 Stranded (Ø 7.2)Semicon + TR-XLPE + Semicon13.84.1015.4035510
  • Typical values for this cable type; dimensions and weights for your order are confirmed in the quotation.
  • Supplied in continuous single-coil or full-phase lengths with zero factory splices to guarantee hermetic stator slot reliability.

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
24-hour water-immersion high-voltage AC withstand & insulation resistance testEvery completed reel is immersed in grounded water and tested at 10 kV to 35 kV AC rms100 % of manufactured reels
100 % in-line 25–50 kV DC spark & laser concentricity monitoringContinuous ultrasonic wall-thickness and high-voltage DC spark verification during extrusion100 % of wire length
Sample tests
Mandrel bend + hot-water (+90 °C) accelerated water-treeing endurance testVerify breakdown retention > 2.5 × U_N after thermal-wet cyclingQualification lot

Inspection certificate

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

Product approvals

DIN 46399 & IEEE Std 1776 Submersible Wet-Winding CompliantIEC 60034-18-42 Inverter-Duty HV Stator Insulation

Company certificates

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

Marking & supply

Ordering & delivery

Sheath marking

Smooth Unprinted Slot-Gliding Surface (Full Drum Traceability & Water Hipot Certificate)
Delivery form
Zero-splice continuous lengths on sealed wooden/steel drums
Splicing consumables
Matched EPR/XLPE vulcanising splice tapes & PEEK heat-shrink kits available
Lead time
3–5 weeks ex-works

Technical documents

Downloads

PDFHVWW High-Voltage Wet-Winding Submersible Motor Magnet Wire – technical datasheet12 sizes · construction, technical data, approvalsXLSXHVWW spec data (Excel)All 12 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.

How does a 'wet-wound' submersible motor stator work, and why can't ordinary enamelled magnet wire be used?
In a wet-wound submersible motor, the stator slots are flooded with clean water/glycol coolant that circulates directly around every turn of the winding to carry heat to the pump casing. Ordinary enamelled magnet wire has a thin 0.05–0.10 mm varnish film that absorbs moisture and breaks down almost immediately when immersed in conductive water. HVWW uses a thick, pinhole-free 0.90 mm to 4.10 mm extruded TR-XLPE, PP or PEEK wall where the surrounding water acts as the grounded outer electrode along the entire wire length.
When should I upgrade from PE2-PA (≤ 1,000 V) to HVWW (3.3 kV – 13.8 kV)?
Above ~250–400 kW pump power, low-voltage (400–1,000 V) submersible motors require impractically thick drop cables and multiple parallel stator windings. Stepping the motor voltage up to 3.3 kV, 6.6 kV, 11 kV or 13.8 kV slashes current by 5–15×, allowing smaller downhole/caisson power cables—and requires HVWW high-voltage wet-winding wire.
Why do 6.6 kV, 11 kV and 13.8 kV HVWW-SC wires include an outer semiconductive layer?
In a water-filled stator slot, if air bubbles form or during dry shop testing before filling with water, high voltage across an unscreened wire surface causes slot corona (partial discharge) in the air gap between the wire and laminated stator iron. An outer semiconductive layer keeps the wire's outer surface clamped at ground potential against the slot wall.
When is PEEK-insulated HVWW-PEEK required instead of TR-XLPE/PA?
Specify HVWW-PEEK when internal motor coolant temperatures exceed +90 °C (up to +180 °C), when stator slot space is extremely tight (PEEK's higher dielectric strength allows a thinner wall and higher copper slot fill), or in high-pressure subsea/geothermal motors.

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HVWW High-Voltage Wet-Winding Submersible Motor Magnet Wire

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Reel & motion:
- Reel type: 
- Drum core diameter (mm): 
- Cable length on drum (m): 
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- Max. acceleration: 
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- Exposure (outdoor, water, oil, abrasion): 
- Destination country: 
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