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Product

PN-G-90006 ek+FtZn MV mining cablePN-G-90006 · 3.6/6 to 12/20 kVXLPE (XS) + Cu Screen (ek)FtZn Steel Tape · Methane-Safe

YHKGXSekFtZnyn CablePolish 3.6/6–12/20 kV XLPE (XS) copper-screened (ek) & FtZn armoured mining cable

The flagship Polish underground coal and copper mining MV feeder cable (YHKGXSekFtZnyn) built to PN-G-90006 with triple-extruded +90 °C XLPE (XS) insulation, individual copper phase screens (ek), galvanized flat steel tape armour (FtZn) and red.

EMC screen
Flame-retardant
Oil-resistant
Approved
Order designation
YHKGXSekFtZnyn 3×120/16 6/10kV
Outer Ø ≈
59.4 mm
Copper weight
3,440 kg/km
Total weight ≈
6,790 kg/km
Ampacity (air)
332 A
All sizes (13)
Request a quoteDatasheetWhatsApp
Engineering reply in 2 business hoursCut-to-length export drumsEN 10204 3.1 certificate per drum
Rated voltage
3.6/6 & 6/10 kV
also 8.7/15 & 12/20 kV
Phase screen
Copper (ek)
individual Cu screen / core
Armour (FtZn)
Galv. steel tape
double helical flat steel tape
Insulation (XS)
Triple XLPE
+90 °C continuous · +250 °C SC
Outer sheath
PVC-yn (Red)
oxygen index OI ≥ 29 %
Max. incline
Up to 45°
roadways, drifts & longwalls

Typical values for this cable type, based on PN-G-90006 / ZN-TF / IEC 60502-2 — confirmed in the datasheet and quotation for your order.

Application fit

Is YHKGXSekFtZnyn right for your machine?

The primary medium-voltage backbone feeder in Polish and Central European underground hard-coal and copper mines, combining individual phase copper screens ('ek') for methane-explosion safety with galvanized flat steel tape armour ('FtZn') for roadway crush resistance.

Mine roadway & tunnel wall hangers

Suitable

Approved for all horizontal and inclined roadways (up to 45°) in non-methane and methane-hazard ('a', 'b', 'c') mines.

TBM gantry & advancing tunnel reel

Suitable

Withstands rockfall, floor heave and heavy haulage traffic along longwall gate roads.

Fixed installation

Suitable

Connects main shaft-bottom substations to district mobile flameproof transformer stations.

Typical machinesGassy Hard-Coal Longwall Gate RoadsUnderground Copper & Silver Ore MinesFlameproof District Transformer FeedersDeep Tunnel & Subsurface Infrastructure

Construction

Layer by layer

Shown: YHKGXSekFtZnyn 3×120/16 mm² 6/10 kV with Class 2 compacted copper conductors, triple-extruded semicon/XLPE/semicon cores, individual copper screens (ek), PVC inner bedding (Y), double galvanized flat steel tape armour (FtZn) and red yn PVC outer sheath.

123456
Schematic, not to scale — generated from the layer data
#LayerMaterial & reference
1Compacted stranded bare copper (RMC)IEC 60228 Class 2 circular compacted copper (25 to 240 mm²)Low AC/DC resistance and smooth conductor profile
2Co-extruded inner & outer semiconductive layersCross-linked semiconductive polymer bonded to the XLPE dielectricPrevents partial discharge under MV cyclic load
3Cross-linked polyethylene (XS / XLPE)2.5 mm (3.6/6 kV) or 3.4 mm (6/10 kV) +90 °C XLPEHigh dielectric margin and +250 °C short-circuit capability
4Individual phase copper screen (ek)Concentric copper wires/tapes over each phase core (16 or 25 mm² total screen)Directs any internal fault immediately to earth before an incendive spark can ignite methane
5Galvanized flat steel tape armour (FtZn) over PVCExtruded PVC bedding + 2 × overlapping galvanized flat steel tapesMechanical barrier against rockfall and crushing
6Flame-retardant mining PVC outer sheath (yn)Self-extinguishing red PVC compound (Oxygen Index ≥ 29 %)IEC 60332-3-22 Cat A bunched flame retardant

YHKGXSekFtZnyn (XLPE +90 °C)

Modern XLPE-insulated (XS) version with +90 °C continuous rating and higher ampacity

YHKGYekFtZnyn (PVC +70 °C)

PVC-insulated (Y) counterpart for 3.6/6 kV & 6/10 kV legacy mining networks

Technical data

Ratings & operating limits

Typical values: Typical values for this cable type, based on PN-G-90006 / ZN-TF / IEC 60502-2. Values for your order are confirmed in the datasheet and quotation.

Electrical

Rated voltage (U₀/U)
3.6/6 kV, 6/10 kV, 8.7/15 kV & 12/20 kV
Partial discharge (PD) level
≤ 5 pC at 1.73 × U₀
50 Hz AC test voltage (5 min)
11 kV (3.6/6 kV) · 15 kV (6/10 kV) · 21 kV (8.7/15 kV) · 29 kV (12/20 kV)

Thermal

Max. conductor operating temperature
+90 °C continuous · +250 °C short-circuit (max. 5 s)
Ambient temperature range
−30 °C to +70 °C (fixed) · −5 °C to +50 °C (installation)

Mechanical

Armour construction (FtZn)
2 × hot-dip galvanized flat steel tapes over PVC bedding
Max. roadway inclination
Up to 45° slope
Minimum bending radius
15 × OD (fixed installation)

Resistance

Flame retardance
PN-EN 60332-1-2 & PN-EN 60332-3-22 Cat A (OI ≥ 29 %)
Corrosive mine-water resistance
Galvanized steel armour + heavy-duty yn PVC outer jacket

Reference standards

Governing standards
PN-G-90006, ZN-TF & IEC 60502-2
Methane hazard approval
Approved for WUG methane hazard degrees 'a', 'b' and 'c'

Identification

Polish code breakdown
YHKG + XS (XLPE) + ek (Cu screen) + FtZn (flat steel tape) + yn (FR-PVC)
Outer sheath colour
Red (MV underground mining identification)
Customs tariff (HS)
8544.60

Sizes

13 standard YHKGXSekFtZnyn 3.6/6 kV & 6/10 kV mining cable sizes

3-core XLPE-insulated, copper-screened (ek), galvanized flat-steel-tape armoured (FtZn) MV mining cables.

Dimensions, weights & ampacity
Order designationPhase / ScreenVoltageOuter Ø ≈
mm		Copper
kg/km		Weight ≈
kg/km		In air 25 °C
A		Min. bend R
mm		Enquiry
3.6/6 kV Screened & Tape-Armoured XLPE Mining Cables (YHKGXSekFtZnyn)
YHKGXSekFtZnyn 3×25/16 3.6/6kV3×25 / 16 mm²3.6/6 kV38.28302,460132573
YHKGXSekFtZnyn 3×35/16 3.6/6kV3×35 / 16 mm²3.6/6 kV41.01,1002,910160615
YHKGXSekFtZnyn 3×50/16 3.6/6kV3×50 / 16 mm²3.6/6 kV44.21,5103,540194663
YHKGXSekFtZnyn 3×70/16 3.6/6kV3×70 / 16 mm²3.6/6 kV48.02,0604,360240720
YHKGXSekFtZnyn 3×95/16 3.6/6kV3×95 / 16 mm²3.6/6 kV52.42,7405,360288786
YHKGXSekFtZnyn 3×120/16 3.6/6kV3×120 / 16 mm²3.6/6 kV55.83,4206,280332837
6/10 kV Screened & Tape-Armoured XLPE Mining Cables (YHKGXSekFtZnyn)
YHKGXSekFtZnyn 3×50/16 6/10kV3×50 / 16 mm²6/10 kV47.81,5253,960194717
YHKGXSekFtZnyn 3×70/16 6/10kV3×70 / 16 mm²6/10 kV51.62,0754,810240774
YHKGXSekFtZnyn 3×95/16 6/10kV3×95 / 16 mm²6/10 kV56.02,7605,840288840
YHKGXSekFtZnyn 3×120/16 6/10kV3×120 / 16 mm²6/10 kV59.43,4406,790332891
YHKGXSekFtZnyn 3×150/25 6/10kV3×150 / 25 mm²6/10 kV63.24,3307,980378948
YHKGXSekFtZnyn 3×185/25 6/10kV3×185 / 25 mm²6/10 kV67.25,2809,2604301,008
YHKGXSekFtZnyn 3×240/25 6/10kV3×240 / 25 mm²6/10 kV72.56,77011,3405051,088
  • Typical values for this cable type; dimensions and weights for your order are confirmed in the quotation.
  • 8.7/15 kV and 12/20 kV executions are also supplied.

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
Partial discharge (≤ 5 pC at 1.73 U₀) & HV AC withstand testPD ≤ 5 pC and 5 min AC withstand test on every drumEvery drum
Sample tests
IEC 60332-3-22 Cat A vertical bunched flame testChar height ≤ 2.5 m under Category A 7 L/m burnerPeriodic audit

Inspection certificate

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

Product approvals

PN-G-90006 & WUG Methane-Roadway ApprovedIEC 60502-2 Partial Discharge ≤ 5 pCPN-EN 60332-3-22 Cat A Flame Retardant

Company certificates

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

Marking & supply

Ordering & delivery

Sheath marking

TEBAOFLEX YHKGXSekFtZnyn <voltage> <size> PN-G-90006 CE
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

PDFYHKGXSekFtZnyn Cable – technical datasheet13 sizes · construction, technical data, approvalsXLSXYHKGXSekFtZnyn spec data (Excel)All 13 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 is YHKGXSekFtZnyn the most widely installed MV cable in Polish underground coal mines?
Polish hard-coal seams are deep, warm and methane-rich. YHKGXSekFtZnyn satisfies all three underground engineering demands simultaneously: +90 °C XLPE ('XS') carries ~23 % more current than legacy +70 °C PVC ('Y'), individual phase copper screens ('ek') provide instant earth-fault isolation in methane atmospheres, and galvanized flat steel tape armour ('FtZn') protects the cable against roadway rockfall.
What is the difference between YHKGXSekFtZnyn and YHKGYekFtZnyn?
The only difference is the core insulation material: YHKGXSekFtZnyn uses cross-linked polyethylene ('XS' / XLPE, rated +90 °C continuous / +250 °C short-circuit), whereas YHKGYekFtZnyn uses thermoplastic PVC ('Y', rated +70 °C continuous / +160 °C short-circuit).
Are the 'ek' copper screens earthed separately from the 'FtZn' steel tape armour?
At flameproof MV couplers and switchgear glands, both the copper phase screens ('ek') and the galvanized steel tape armour ('FtZn') are bonded to the mine protective earth conductor, with the copper screens carrying the primary capacitive and earth-fault return current.
What factory routine tests and certificates are supplied with YHKGXSekFtZnyn?
Every production drum of YHKGXSekFtZnyn undergoes 100 % conductor DC resistance measurement at 20 °C, high-voltage AC/DC dielectric withstand testing, and dimensional verification per PN-G-90006 / ZN-TF / IEC 60502-2, supplied with an EN 10204 3.1 inspection certificate.

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YHKGXSekFtZnyn Cable

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