1 / 5

Product

IEC 60519-3 low-reactance induction cableIEC 60519-3 · 50 Hz to 50 kHz2-Conductor Go/Return in 1 HoseUltra-Low Inductive Reactance (X_L)

Water-Cooled Two-Conductor Coaxial Cable50 Hz–50 kHz (1.5–11.5 kA) low-reactance 2-conductor water-cooled induction furnace

Low-reactance two-conductor coaxial and interleaved water-cooled flexible power cable (Water-Cooled Two-Conductor Coaxial Cable) built to IEC 60519-3 for medium- and high-frequency (50 Hz to 50 kHz, up to 3,000 V and 12 kA) coreless induction melting.

Water-resistant
Low-EMC design
Flame-retardant
Approved
Order designation
WC-2C-LR-2×320
Hose OD ≈
62.0 mm
Rated current
5.5 kA
Water flow
28 L/min
Min. bend R
530 mm
All sizes (7)
Request a quoteDatasheetWhatsApp
Engineering reply in 2 business hoursCut-to-length export drumsEN 10204 3.1 certificate per drum
Frequency
50 Hz to 50 kHz
MF melting & HF tube/billet heat
Architecture
2-Cond. Coaxial
or 6-sector interleaved go/return
Rated voltage
800 to 3,000 V
tested to 6–10 kV AC rms
Current rating
1.5 to 11.5 kA
2×95 mm² up to 2×630 mm² TCu
Magnetic force
Self-cancelling
zero external cable whip / kick
Min. bend R
8.5 × Hose OD
furnace hydraulic tilt & coil move

Typical values for this cable type, based on IEC 60519-3 / JB/T 6314 / VDE 0721 — confirmed in the datasheet and quotation for your order.

Application fit

Is Water-Cooled Two-Conductor Coaxial Cable right for your machine?

At medium and high frequencies (250 Hz to 50 kHz), two separate single-conductor cables would suffer enormous inductive voltage drop (ΔV = 2πf·L·I) and violently repel each other. Placing both the Go (+I) and Return (−I) water-cooled conductors coaxially or in interleaved sectors inside a single hose cuts inductance by 75–85 % and cancels external magnetic forces.

Furnace, kiln & high-temp zone

Suitable

Powers tilting coreless induction melting furnaces, vacuum induction melting (VIM) chambers and continuous strip/billet induction coils.

Immersion & wet locations

Suitable

Dual internal cooling water paths remove high-frequency skin-effect and proximity-effect losses directly from both conductors.

VFD inverter to AC motor screened feeder

Suitable

Ultra-low loop inductance (0.04–0.08 µH/m) preserves resonant tank power factor (Q) between thyristor/IGBT inverters and work coils.

Typical machinesCoreless Induction Melting Furnaces (Foundry Iron, Steel, Al, Cu)Vacuum Induction Melting (VIM) & Cold-Crucible FurnacesMF/HF Forging Billet Heaters & Seam-Welded Tube MillsInduction Hardening, Brazing & Crystal-Pulling Coils

Construction

Layer by layer

Shown: WC-2C-LR-2×320 (2×320 mm² · 5.5 kA · 2.5 kV · 250 Hz–4 kHz) low-reactance water-cooled induction cable with inner tinned-copper rope/hose core, high-dielectric silicone/EPDM barrier tube, concentric/interleaved outer tinned-copper return rope, dual isolated copper terminal blocks and slag-resistant EPDM outer cooling hose.

1234
Schematic, not to scale — generated from the layer data
#LayerMaterial & reference
1Concentric / interleaved outer Return conductor (−I)Concentric braided/stranded tinned copper rope (or 3+3 alternating ± sector ropes) bathedEncloses the forward magnetic flux so external stray field and mechanical cable whip are eliminated
2Inner cooling channel & central Go conductor (+I)Perforated PTFE/EPDM coolant core surrounded by fine Ø 0.15–0.25 mm tinned copperThin tinned strands suppress high-frequency eddy/skin loss while carrying the forward furnace current
3High-dielectric inter-conductor barrier hoseSeamless extruded silicone rubber or peroxide-cured EPDM insulating tube + PTFE/polyimideSeparates the +I and −I conductors by minimal radial spacing to minimise loop inductance L
4Cord-reinforced slag-resistant EPDM outer cooling hoseAbrasion-, heat- and splash-resistant EPDM rubber hose (with optional fiberglass/siliconeContains up to 0.8 MPa cooling water pressure and protects against foundry metal splash

True Coaxial Water-Cooled (Inner Go + Concentric Outer Return)

Lowest possible inductance (0.04 µH/m) and zero external stray field for 1 kHz to 50 kHz converters

6-Sector Interleaved Symmetrical (+ − + − + −)

Symmetrical impedance between Go and Return phases for high-current 150 Hz to 3 kHz melting furnaces

Technical data

Ratings & operating limits

Typical values: Typical values for this cable type, based on IEC 60519-3 / JB/T 6314 / VDE 0721. Values for your order are confirmed in the datasheet and quotation.

Electrical

Operating frequency & voltage range
50 Hz to 50 kHz · 800 V to 3,000 V AC rms (6–10 kV AC dielectric test)
Loop inductance per unit length (L')
0.04 to 0.08 µH/m (75–85 % lower than two separate single-core cables)
Continuous MF/HF current rating
1,500 A (2×95 mm²) to 11,500 A (2×630 mm²)

Thermal

Cooling water flow & temperature
12 to 52 L/min deionised water (≤ 50 µS/cm) · Inlet ≤ 35 °C, Outlet ≤ 55 °C
Thermal cycling & overload stability
Verified thermal ageing and short-circuit withstand per standard

Mechanical

Working & test hydrostatic pressure
0.4–0.6 MPa working · 1.0–1.2 MPa routine hydrostatic proof test
Minimum dynamic bending radius
8.5 × outer hose diameter during hydraulic furnace pour tilting

Resistance

Inter-conductor dielectric strength
6.0 kV to 10.0 kV AC rms (50 Hz, 1 min) between Go and Return conductors
Environmental & chemical durability
Resistant to moisture, industrial fluids and service ageing

Reference standards

Governing induction heating standards
IEC 60519-3 (Safety in induction heating), VDE 0721 & JB/T 6314
Factory QA & material compliance
EN 10204 3.1 routine test certificate · RoHS 2 & REACH compliant

Identification

Terminal head options
Parallel flat-palm, 90° elbow, coaxial flange or vacuum-feedthrough
Customs tariff (HS)
8544.42 / 8514.90

Sizes

7 standard low-reactance 2-conductor water-cooled induction cable sizes

2×95 mm² to 2×630 mm² coaxial and interleaved go-and-return MF/HF induction furnace leads.

Cross-section, frequency, current & cooling water flow
Order designationGo + Return areaVoltage · Freq.Hose OD ≈
mm		Rated current
kA		Water flow
L/min		Min. bend R
mm		Enquiry
High- & Medium-Frequency Coaxial Induction Leads (1–50 kHz · 2×95 to 2×240 mm²)
WC-2C-LR-2×952×95 mm² (Go & Return)1.5 kV · 1–10 kHz38.01.612320
WC-2C-LR-2×1502×150 mm² (Go & Return)1.5 kV · 1–10 kHz45.02.516380
WC-2C-LR-2×2402×240 mm² (Go & Return)2.0 kV · 0.5–10 kHz54.04.022460
High-Current Melting Furnace Interleaved/Coaxial Leads (50 Hz–4 kHz · 2×320 to 2×630 mm²)
WC-2C-LR-2×3202×320 mm² (Go & Return)2.5 kV · 0.25–4 kHz62.05.528530
WC-2C-LR-2×4002×400 mm² (Go & Return)3.0 kV · 0.1–3 kHz68.07.034580
WC-2C-LR-2×5002×500 mm² (Go & Return)3.0 kV · 0.05–2 kHz75.09.042650
WC-2C-LR-2×6302×630 mm² (Go & Return)3.0 kV · 0.05–1 kHz84.011.552720
  • Typical values for this cable type; dimensions and weights for your order are confirmed in the quotation.
  • Manufactured to exact pin-to-pin length (1.5 m to 12 m) with customer-specified copper palm hole patterns and water fittings.

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
6.0–10.0 kV AC inter-conductor dielectric & 1.0 MPa hydrostatic testZero breakdown between Go and Return; zero water leakage over 30 minEvery cable assembly
Sample tests
1 kHz / 10 kHz LCR bridge inductance (L') & AC resistance verifyLoop inductance L' ≤ 0.08 µH/mDesign & lot audit

Inspection certificate

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

Product approvals

IEC 60519-3 Induction Heating Safety Compliant100 % 6–10 kV Dielectric & 1.0 MPa Hydrostatic TestedCE & ISO 9001 Certified

Company certificates

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

Marking & supply

Ordering & delivery

Sheath marking

Stamped on Cu palms: TEBAOFLEX WC-2C-LR <size> L=<mm> Vmax=<V> SERIAL#
Delivery form
Non-returnable fumigated wooden or steel drums
Standard lengths
250 m · 500 m · 1000 m standard drums
MOQ
250 m (stock sizes) · 500 m (custom)
Lead time
3–5 weeks ex-works
Incoterms
EXW, FCA, FOB, CIF, DAP

Technical documents

Downloads

PDFWater-Cooled Two-Conductor Coaxial Cable – technical datasheet7 sizes · construction, technical data, approvalsXLSXWater-Cooled Two-Conductor Coaxial Cable spec data (Excel)All 7 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.

Why must medium- and high-frequency induction furnaces use a two-conductor coaxial cable instead of two single-core water-cooled cables?
Inductive reactance scales linearly with frequency (X_L = 2πf·L). At 1,000 Hz to 10,000 Hz, two separate single-core cables spaced 150 mm apart have an inductance of ~0.45 µH/m, causing hundreds of volts of reactive drop per metre, intense stray heating of nearby steel platforms and violent electromagnetic thrashing. Placing both Go and Return conductors coaxially or in interleaved sectors inside one hose cuts inductance to 0.04–0.08 µH/m and cancels external magnetic forces.
Why are the copper strands inside an MF/HF induction cable tinned and fine-drawn (Ø 0.15–0.25 mm)?
At 3 kHz, the skin depth in copper is only ~1.2 mm (and at 10 kHz only ~0.66 mm). Using fine individually tinned copper wires (Ø 0.15–0.25 mm) in transposed Litz-like sub-bundles prevents eddy currents from jumping between strands and prevents green copper-oxide scale in deionised cooling water.
When is a 6-sector interleaved design used instead of a concentric tube-in-tube coaxial design?
In a pure concentric coaxial cable, the inner conductor has a smaller diameter than the outer conductor. For high-current, lower-frequency melting furnaces (150 Hz to 3 kHz, 4–12 kA), arranging 6 alternating sectors (+ − + − + −) around a central cooling core gives identical AC resistance and identical cooling on both poles.
What factory routine tests and certificates are supplied with Water-Cooled Two-Conductor Coaxial Cable?
Every production drum of Water-Cooled Two-Conductor Coaxial Cable undergoes 100 % conductor DC resistance measurement at 20 °C, high-voltage AC/DC dielectric withstand testing, and dimensional verification per IEC 60519-3 / JB/T 6314 / VDE 0721, supplied with an EN 10204 3.1 inspection certificate.

Request a quote

Get an engineering quote for Water-Cooled Two-Conductor Coaxial Cable

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

01Selected sizes

Use + Add next to a size or configuration.

02Reel & motion

Add your operating conditions here to include them in your enquiry.

03Message for our engineers

Water-Cooled Two-Conductor Coaxial 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: 
- Equipment and operating conditions:
Send via WhatsApp

Single-pole EAF cable

EAF Water-Cooled Cable

300–6,000 mm² (10–90 kA) water-cooled flexible EAF & LF jumper

View productTransposed REBCO bar

HTS Roebel Cable

Low-AC-loss transposed REBCO 2G HTS rectangular Roebel cable

View product4.5 K Nb3Sn/NbTi CICC

CICC Superconducting Conductor

Forced-flow supercritical helium fusion CICC magnet conductor

View product20 K MgB2 DC link

MgB2 Superconducting Link Cable

20–120 kA DC Magnesium Diboride superconducting transfer line

View product
DatasheetRequest a quote