Longwall shearer & Bretby handler
Reinforced 'Z' double sheath prevents kinking, corkscrewing, and pinch damage in heavy Bretby chains.
Product
OnZGcekż-GW(A) is an extra-heavy-duty 0.6/1 kV mechanically reinforced and water-blocked screened mining trailing cable for high-stress longwall shearers and roadheaders. The 'Z' designation denotes an embedded synthetic/aramid reinforcement braid between
Typical values for this cable type, based on PN-G-90101 / ZN-TF-207 — confirmed in the datasheet and quotation for your order.
Application fit
Engineered for extreme mechanical abuse on high-tonnage longwall coal faces, steep-seam shearers, and heavy roadheaders subject to rockfalls, hydraulic pan crushing, and wet floor haulage.
Reinforced 'Z' double sheath prevents kinking, corkscrewing, and pinch damage in heavy Bretby chains.
Withstands severe rockfall impact, crawler track pinching, and axial dragging along rough mine floors.
Full '-GW' longitudinal and radial water-blocking for flooded longwall faces and sump headings.
Anti-torsion 'Z' braid allows tensioned monospiral and shuttle-car reeling up to 25 N/mm².
Highest mechanical protection class among 0.6/1 kV PN-G-90101 longwall trailing cables.
Construction
Screened +90 °C EPR power cores, '(A)' elastomeric cradle, hydro-swelling water barrier ('W'), inner PCP sheath, 'Z' anti-crush braid, and
| # | Layer | Material & reference |
|---|---|---|
| 1 | Flexible copper conductors | Class 5 fine-stranded plain or tinned copper with water-blocking yarnsIEC 60228 Class 5 |
| 2 | +90 °C EPR core insulation ('c') | Cross-linked heat-resistant ethylene-propylene elastomerPN-G-90101 |
| 3 | Elastomeric core & pilot screens ('ek') | Extruded semi-conductive rubber screens over phase cores and control bundlePN-G-90101 |
| 4 | Pilot unit ('ż'), PE & '(A)' cradle | Screened bundle of 4–9 pilot cores, bare copper PE, and shock-absorbing elastomericZN-TF-207 |
| 5 | Hydro-swelling water barrier ('W') | Water-swellable non-woven tapes blocking longitudinal moisture migrationZN-TF-207 |
| 6 | Mechanical reinforcement braid ('Z') | High-tenacity synthetic/polyamide anti-torsion and anti-crush braid vulcanised betweenPN-G-90101 |
| 7 | Dual-layer reinforced PCP sheath | Extra-heavy-duty flame-retardant, oil- and tear-resistant polychloroprene outer jacketPN-G-90101 |
Reinforced water-blocked 3-phase + PE + 4×2.5 mm² pilot cable for heavy roadheaders and shearers.
Multi-pilot reinforced longwall shearer feeder with full telemetry and earth-loop control.
Technical data
Sizes
Nominal dimensions, copper weights and electrical parameters for OnZGcekż-GW(A) per PN-G-90101 / ZN-TF-207.
| Order designation | Power + PE + Control | Phase size mm² | Outer Ø ≈ mm | Copper kg/km | Weight ≈ kg/km | Min. bend R fixed mm | Enquiry |
|---|---|---|---|---|---|---|---|
| Standard OnZGcekż-GW(A) configurations | |||||||
| OnZGcekż-GW(A) 3×25 + 1×16 + 4×2.5 | 3×25 + 1×16 + 4×2.5 | 25 | 39.2 | 970 | 2,360 | 235 | |
| OnZGcekż-GW(A) 3×35 + 1×16 + 4×2.5 | 3×35 + 1×16 + 4×2.5 | 35 | 42.0 | 1,258 | 2,820 | 252 | |
| OnZGcekż-GW(A) 3×50 + 1×25 + 4×2.5 | 3×50 + 1×25 + 4×2.5 | 50 | 46.8 | 1,776 | 3,640 | 281 | |
| OnZGcekż-GW(A) 3×70 + 1×25 + 4×2.5 | 3×70 + 1×25 + 4×2.5 | 70 | 51.8 | 2,352 | 4,560 | 311 | |
| OnZGcekż-GW(A) 3×95 + 1×35 + 4×2.5 | 3×95 + 1×35 + 4×2.5 | 95 | 57.4 | 3,168 | 5,760 | 344 | |
| OnZGcekż-GW(A) 3×120 + 1×50 + 4×2.5 | 3×120 + 1×50 + 4×2.5 | 120 | 62.2 | 4,032 | 6,980 | 373 | |
| OnZGcekż-GW(A) 3×50 + 1×25 + 7×2.5 | 3×50 + 1×25 + 7×2.5 | 50 | 48.4 | 1,848 | 3,840 | 290 | |
| OnZGcekż-GW(A) 3×70 + 1×35 + 7×2.5 | 3×70 + 1×35 + 7×2.5 | 70 | 53.2 | 2,520 | 4,810 | 319 | |
| OnZGcekż-GW(A) 3×95 + 1×50 + 7×2.5 | 3×95 + 1×50 + 7×2.5 | 95 | 58.8 | 3,384 | 6,050 | 353 | |
| OnZGcekż-GW(A) 3×120 + 1×50 + 9×2.5 | 3×120 + 1×50 + 9×2.5 | 120 | 63.6 | 4,152 | 7,280 | 382 | |
| Configuration | Max. DC R @ 20 °C Ω/km | Current rating in air (A) | Current rating installed (A) | Mutual C pF/m ≈ | AC test V rms |
|---|---|---|---|---|---|
| 3×25 + 1×16 + 4×2.5 | 0.780 | 123 | 105 | 114 | 3,000 |
| 3×35 + 1×16 + 4×2.5 | 0.554 | 152 | 129 | 129 | 3,000 |
| 3×50 + 1×25 + 4×2.5 | 0.386 | 189 | 161 | 150 | 3,000 |
| 3×70 + 1×25 + 4×2.5 | 0.272 | 233 | 198 | 180 | 3,000 |
| 3×95 + 1×35 + 4×2.5 | 0.206 | 282 | 240 | 216 | 3,000 |
| 3×120 + 1×50 + 4×2.5 | 0.161 | 326 | 277 | 252 | 3,000 |
| 3×50 + 1×25 + 7×2.5 | 0.386 | 189 | 161 | 150 | 3,000 |
| 3×70 + 1×35 + 7×2.5 | 0.272 | 233 | 198 | 180 | 3,000 |
| 3×95 + 1×50 + 7×2.5 | 0.206 | 282 | 240 | 216 | 3,000 |
| 3×120 + 1×50 + 9×2.5 | 0.161 | 326 | 277 | 252 | 3,000 |
Quality & approvals
Routine tests on every production length, sample and type tests per batch — documented on an EN 10204 3.1 inspection certificate.
| Testing & inspection | Test value / reference | Frequency |
|---|---|---|
| Routine tests | ||
| AC voltage withstand test | 3.0 kV rms (power) and 1.5 kV rms (pilot) for 5 minutes | Every drum |
| Screen continuity & resistivity | ≤ 500 Ω·m elastomeric screen in contact with earth core | Every drum |
| Sample tests | ||
| Impact crush & longitudinal water penetration | Passes PN-G-90101 crush test and '-GW' hydrostatic water block test | Per batch |
| Flame propagation & tear strength | Passes PN-EN 60332-1-2 and reinforced sheath tear test | Type approval |
Marking & supply
Sheath marking
Technical documents
FAQ
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