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Product

PN-G-90006 screened mining MV cablePN-G-90006 · 3.6/6 & 6/10 kVXLPE (XS) + Copper Screen (ek)Unarmoured · Methane-Safe

YHKGXSekyn CablePolish 3.6/6 kV & 6/10 kV copper-screened (ek) XLPE unarmoured mining MV cable

Copper-screened Polish underground mining medium-voltage cable (YHKGXSekyn) built to PN-G-90006 in 3.6/6 kV and 6/10 kV ratings with triple-extruded semiconductive + XLPE (XS) core insulation, individual phase copper screens (ek) and flame-retardant PVC.

EMC screen

Low-EMC design

Flame-retardant

Approved

Configuration

Order designation: YHKGXSekyn 3×95/16 6/10kV
Outer Ø ≈: 52.0 mm
Copper weight: 2,760 kg/km
Total weight ≈: 4,510 kg/km
Ampacity (air): 295 A

All sizes (12)

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Engineering reply in 2 business hoursCut-to-length export drumsEN 10204 3.1 certificate per drum

Rated voltage: 3.6/6 & 6/10 kV
Phase screen: Copper (ek)
Insulation (XS): Triple XLPE
Outer sheath: PVC-yn (Red)
Cross-sections: 3×25–240 mm²
Min. bend R: 15 × OD

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 YHKGXSekyn right for your machine?

Designed for underground coal and copper mine substations, switchgear bays and protected horizontal galleries (including methane hazard degrees a, b, c) where radial electric-field confinement and earth-leakage tripping ('ek') are mandatory.

Mine roadway & tunnel wall hangers

Suitable

Approved for protected horizontal galleries and switchgear rooms in methane-hazard underground mines.

Fixed installation

Suitable

Lighter and smaller bending radius than armoured cables inside underground transformer stations.

TBM gantry & advancing tunnel reel

With conditions

Unarmoured; where mechanical impact or rockfall risk exists, specify YHKGXSekFtZnyn.

Free-hanging vertical run

Not suitable

Not rated for vertical shaft suspension; specify wire-armoured YHKGXSFoyn.

YHKGXSFoyn Shaft Wire-Armoured Cable

Typical machinesMethane-Hazard Underground Coal MinesUnderground MV Switchgear & SubstationsCopper & Polymetallic Ore MinesMining Tunnel & Gallery Electrification

Construction

Layer by layer

Shown: YHKGXSekyn 3×95/16 mm² 6/10 kV with Class 2 compacted copper conductors, triple-extruded inner semicon + XLPE (XS) + outer strippable semicon, individual copper screen (ek) on each core and red yn PVC outer sheath.

Schematic, not to scale — generated from the layer data

#	Layer	Material & reference
1	Compacted stranded bare copper (RMC)	IEC 60228 Class 2 circular compacted copper (25 to 240 mm²)Smooth cylindrical surface for void-free semiconductive extrusion
2	Inner & outer extruded semiconductive screens	Cross-linked semiconductive compound co-extruded with the XLPE wallEliminates partial discharge voids at conductor and screen boundaries
3	Cross-linked polyethylene (XS / XLPE)	2.5 mm wall (3.6/6 kV) or 3.4 mm wall (6/10 kV) dry-cured XLPE (+90 °C)High dielectric strength and low dielectric loss
4	Individual phase copper screen (ek)	Helical copper tapes or concentric copper wires + equalizing tape (16 or 25 mm²Ensures immediate sensitive earth-fault relay tripping prior to phase-to-phase arcing
5	Flame-retardant mining PVC outer sheath (yn)	Self-extinguishing PVC compound (Oxygen Index ≥ 29 %) in Red over inner fillingIEC 60332-3-22 Cat A bunched flame retardant

YHKGXSekyn 3.6/6 kV

2.5 mm XLPE insulation wall + individual copper phase screens (ek)

YHKGXSekyn 6/10 kV (and 8.7/15, 12/20 kV)

3.4 mm to 5.5 mm triple-extruded XLPE wall + individual copper screens

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 (Umax 7.2 kV) & 6/10 kV (Umax 12 kV); also 8.7/15 & 12/20 kV
Partial discharge (PD) level: ≤ 5 pC at 1.73 × U₀ ambient routine test
50 Hz AC test voltage (5 min): 11 kV AC (3.6/6 kV) · 15 kV AC (6/10 kV)

Thermal

Max. conductor operating temperature: +90 °C continuous · +250 °C short-circuit (max. 5 s)
Max. copper screen short-circuit temp.: +350 °C adiabatic earth-fault limit

Mechanical

Minimum bending radius: 15 × OD (fixed screened multi-core cable)
Max. roadway inclination: Up to 15° (unarmoured)

Resistance

Flame retardance: PN-EN 60332-1-2 & PN-EN 60332-3-22 Cat A (OI ≥ 29 %)
Chemical & mine-water resistance: Acid, alkali and hydraulic oil resistant yn PVC jacket

Reference standards

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

Identification

Polish code breakdown: YHKG + XS (XLPE) + ek (Cu phase screen) + yn (flame-retardant PVC)
Outer sheath colour: Red (MV underground mining identification)
Customs tariff (HS): 8544.60

Sizes

12 standard YHKGXSekyn 3.6/6 kV & 6/10 kV screened mining cable sizes

3-core XLPE-insulated, individually copper-screened (ek) unarmoured underground mining power cables.

Dimensions, weights & ampacity
Order designation	Phase / Screen	Voltage	Outer Ø ≈ mm	Copper kg/km	Weight ≈ kg/km	In air 25 °C A	Min. bend R mm
3.6/6 kV Copper-Screened XLPE Mining Cables (YHKGXSekyn)
YHKGXSekyn 3×25/16 3.6/6kV	3×25 / 16 mm²	3.6/6 kV	34.5	830	1,680	135	518
YHKGXSekyn 3×35/16 3.6/6kV	3×35 / 16 mm²	3.6/6 kV	37.2	1,100	2,040	165	558
YHKGXSekyn 3×50/16 3.6/6kV	3×50 / 16 mm²	3.6/6 kV	40.4	1,510	2,560	198	606
YHKGXSekyn 3×70/16 3.6/6kV	3×70 / 16 mm²	3.6/6 kV	44.2	2,060	3,260	245	663
YHKGXSekyn 3×95/16 3.6/6kV	3×95 / 16 mm²	3.6/6 kV	48.5	2,740	4,120	295	728
YHKGXSekyn 3×120/16 3.6/6kV	3×120 / 16 mm²	3.6/6 kV	51.8	3,420	4,920	340	777
6/10 kV Copper-Screened XLPE Mining Cables (YHKGXSekyn)
YHKGXSekyn 3×50/16 6/10kV	3×50 / 16 mm²	6/10 kV	44.0	1,525	2,890	198	660
YHKGXSekyn 3×70/16 6/10kV	3×70 / 16 mm²	6/10 kV	47.8	2,075	3,620	245	717
YHKGXSekyn 3×95/16 6/10kV	3×95 / 16 mm²	6/10 kV	52.0	2,760	4,510	295	780
YHKGXSekyn 3×120/16 6/10kV	3×120 / 16 mm²	6/10 kV	55.4	3,440	5,340	340	831
YHKGXSekyn 3×150/25 6/10kV	3×150 / 25 mm²	6/10 kV	59.2	4,330	6,380	385	888
YHKGXSekyn 3×185/25 6/10kV	3×185 / 25 mm²	6/10 kV	63.0	5,280	7,520	440	945

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 YHKGXSekyn cables are also manufactured to order.

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
Partial discharge (≤ 5 pC at 1.73 U₀) & 11/15 kV AC test	Zero breakdown and PD ≤ 5 pC across triple-extruded XLPE cores	Every drum
Sample tests
IEC 60332-3-22 Cat A bunched vertical flame test	Pass Category A vertical ladder flame test	Periodic audit

Inspection certificate

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

Product approvals

PN-G-90006 & WUG Methane-Gallery ApprovedIEC 60502-2 Partial Discharge ≤ 5 pC VerifiedPN-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 YHKGXSekyn <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

PDFYHKGXSekyn Cable – technical datasheet12 sizes · construction, technical data, approvals XLSXYHKGXSekyn 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.

What is the function of the 'ek' copper screen in YHKGXSekyn?

The 'ek' screen surrounds each individual XLPE-insulated phase core with a semiconductive layer and concentric copper tape/wires. In a methane-bearing coal mine, any insulation fault is immediately forced into a controlled phase-to-earth fault detected within milliseconds by central earth-leakage protection, preventing open phase-to-phase arcing.

How does YHKGXSekyn differ from YHKGXSekFtZnyn?

Both feature +90 °C XLPE insulation ('XS') and individual copper phase screens ('ek'). YHKGXSekyn is unarmoured for switchgear halls and protected horizontal galleries, whereas YHKGXSekFtZnyn adds double galvanized flat steel tape armour ('FtZn') for galleries exposed to mechanical crush or inclinations up to 45°.

Why does YHKGXSekyn support voltages up to 6/10 kV, 8.7/15 kV and 12/20 kV whereas unscreened YHKGXSyn stops at 3.6/6 kV?

Above 3.6/6 kV, radial electric stress at core interstices would cause corona ionisation without semiconductive and metallic phase screens. The triple-extruded semicon/XLPE/ek structure of YHKGXSekyn keeps the electric field strictly radial up to 12/20 kV.

What factory routine tests and certificates are supplied with YHKGXSekyn?

Every production drum of YHKGXSekyn 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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YHKGXSekyn Cable

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