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Product

GOST KGE / KGESh screened mining & excavator cablesGOST 24334 / TU 3541660/1140 V · 1.9/3.3 kVPower + G.657A2 / OM3 Fibre

KOGRESh Optical-Power Composite Screened Mining Trailing CableGOST 24334 / TU 3541 660/1140 V & 1.9/3.3 kV optical-power hybrid coal-shearer cable

KOGRESh (КОГРЭШ / КОГРЭСШ) is an optical-power composite (О = оптический модуль) +90 °C EPR-insulated (Р) screened (Э) underground mine (Ш) trailing cable for 660/1140 V and 1.9/3.3 kV automated longwall coal shearers and roadheaders, combining 3 phase

EMC screen
Low-EMC design
Oil-resistant
Flame-retardant
Order designation
KOGRESh 3×95+1×35+3×2.5+8FO(G.657A2) - 1140 V
Outer Ø ≈
57.5 mm
Copper weight
3,170 kg/km
Total weight ≈
5,180 kg/km
Min. bend R (fixed)
345 mm
All sizes (8)
Request a quoteDatasheetWhatsApp
Engineering reply in 2 business hoursCut-to-length export drumsEN 10204 3.1 certificate per drum
Rated voltage
1.14 & 3.3 kV
660/1140 V & 1.9/3.3 kV AC
Optical module
4–12 FO (О)
ITU-T G.657A2 SM or OM3 MM
Insulation
+90 °C EPR (Р)
High-ampacity cross-linked EPR
Screening
Phase & Pilot Э
Individual Cu/semicon core screens
Outer sheath
RShN-1 / 5GM5
Flame-retardant mine PCP (Ш)
Min. bend radius
6×D / 8×D
Protects optical tube in Bretby

Typical values for this cable type, based on GOST 24334 / TU 3541 (КОГРЭШ) — confirmed in the datasheet and quotation for your order.

Application fit

Is KOGRESh right for your machine?

Designed for unmanned and remote-controlled longwall coal shearers, roadheaders, and automated face conveyors requiring gigabit video, LiDAR, and PLC telemetry alongside 1.14 kV or 3.3 kV traction

Longwall shearer & Bretby handler

Suitable

Armoured gel-free/loose-tube G.657A2 optical unit withstands repetitive Bretby chain flexing.

Mine roadway & tunnel wall hangers

Suitable

Eliminates separate fragile communication cables along the longwall face.

Trailing & towing

Suitable

Profiled elastomeric cradle shields the optical module against radial pinch loads.

Fixed installation

Suitable

Used for high-speed optical + power gate-end to shearer umbilical links.

Vertical / spreader reel

With conditions

For vertical shaft suspension specify steel-armoured shaft hybrid cable.

KGEZhTSh
Typical machinesAutomated & unmanned longwall coal facesRemote-controlled roadheadersSmart mine Gigabit Ethernet & video1140 V & 3300 V shearer telemetry

Construction

Layer by layer

Three Class 5 copper phase cores (+90 °C EPR insulation + semi-conductive/metallic screens Э), earth conductor, screened control cores

123456
Schematic, not to scale — generated from the layer data
#LayerMaterial & reference
1Phase, earth & control conductorsFinely stranded copper, Class 5 per GOST 22483 / IEC 60228GOST 22483 Class 5
2Cradle & optical fibre module (О)4 to 12 ITU-T G.657A2 or OM3 fibres in a crush-protected tube with aramid yarn &TU 3541 / ITU-T G.657A2
3+90 °C EPR insulation (Р)Cross-linked ethylene-propylene rubber (EPR) rated +90 °CGOST 24334 / TU 3541
4Phase & control screens (Э)Semi-conductive elastomer and copper-polymer screen over each power and control coreGOST 24334
5Inner sheath & anti-tear braidPolychloroprene inner bedding + synthetic reinforcement braidTU 3541
6Outer mine sheath (Ш)Heavy-duty flame-retardant, oil- and tear-resistant polychloroprene RShN-1 / 5GM5GOST 24334

KOGRESh 660/1140 V (3P+E+C+FO)

1140 V optical-power composite coal-shearer cable with 4, 6, 8, or 12 SM/MM fibres.

KOGRESh 1.9/3.3 kV (3P+E+C+FO)

3300 V medium-voltage optical-power hybrid trailing cable for high-power automated shearers.

Technical data

Ratings & operating limits

Typical values: Typical values for this cable type, based on GOST 24334 / TU 3541 (КОГРЭШ). Values for your order are confirmed in the datasheet and quotation.

Electrical

Rated voltage U0/U
660/1140 V (0.66/1.14 kV) & 1.9/3.3 kV AC
AC routine test voltage
3.5 kV rms (1.14 kV) · 6.5 kV rms (3.3 kV)
Control core rating
220/380 V AC screened pilot/control
Insulation resistance @ 20 °C
≥ 100 MΩ·km

Thermal

Max. conductor operating temp.
+90 °C continuous (Р EPR)
Max. short-circuit temperature
+250 °C (5 s)
Ambient temperature range
-30 °C to +55 °C

Mechanical

Min. bending radius (dynamic)
6 × D (1.14 kV) · 8 × D (3.3 kV)
Max. tensile load
24.5 N/mm² on copper cross-section
Optical element crush resistance
≥ 3000 N/100 mm radial crush protection

Optical

Fibre type options
ITU-T G.657A2 bend-insensitive SM (9/125
Attenuation @ 1310 / 1550 nm (SM)
≤ 0.40 dB/km @ 1310 nm · ≤ 0.30 dB/km @
Attenuation @ 850 / 1300 nm (OM3)
≤ 3.5 dB/km @ 850 nm · ≤ 1.5 dB/km @ 1300 nm
Standard fibre count
4, 6, 8, or 12 fibres in aramid-reinforced

Resistance

Flame retardancy
GOST IEC 60332-1-2 underground mine flame
Oil & hydraulic emulsion
DIN EN 60811-404 / GOST RShN-1
Abrasion & tear resistance
Heavy-duty longwall coal-face polychloroprene

Reference standards

Primary specification
GOST 24334 / TU 3541 (КОГРЭШ) / ITU-T G.657A2
Conductor standard
GOST 22483 / IEC 60228 Class 5

Identification

Core coding
3 phase cores + 1 earth + control cores +
Outer sheath colour
Yellow with embossed КОГРЭШ legend

Sizes

8 standard configurations (KOGRESh)

Nominal dimensions, copper weights and electrical parameters for KOGRESh per GOST 24334 / TU 3541 (КОГРЭШ).

Dimensions & weights
Order designationConfigurationPhase size mm²Outer Ø ≈
mm		Copper
kg/km		Weight ≈
kg/km		Min. bend R
fixed mm		Enquiry
Standard KOGRESh configurations
KOGRESh 3×35+1×16+3×2.5+6FO(G.657A2) - 1140 V3×35 + 1×16E + 3×2.5 + 6FO (1140 V)3542.51,2452,490255
KOGRESh 3×50+1×16+3×2.5+6FO(G.657A2) - 1140 V3×50 + 1×16E + 3×2.5 + 6FO (1140 V)5047.01,6803,150282
KOGRESh 3×70+1×25+3×2.5+8FO(G.657A2) - 1140 V3×70 + 1×25E + 3×2.5 + 8FO (1140 V)7052.22,3404,050313
KOGRESh 3×95+1×35+3×2.5+8FO(G.657A2) - 1140 V3×95 + 1×35E + 3×2.5 + 8FO (1140 V)9557.53,1705,180345
KOGRESh 3×120+1×35+3×2.5+12FO(G.657A2) - 1140 V3×120 + 1×35E + 3×2.5 + 12FO (1140 V)12062.03,8906,160372
KOGRESh 3×50+1×25+3×4+8FO(G.657A2) - 1.9/3.3 kV3×50 + 1×25E + 3×4 + 8FO (1.9/3.3 kV)5051.21,8303,790307
KOGRESh 3×70+1×35+3×4+8FO(G.657A2) - 1.9/3.3 kV3×70 + 1×35E + 3×4 + 8FO (1.9/3.3 kV)7056.52,5104,790339
KOGRESh 3×95+1×50+3×4+12FO(G.657A2) - 1.9/3.3 kV3×95 + 1×50E + 3×4 + 12FO (1.9/3.3 kV)9562.03,3906,040372
  • Typical values for this cable type; dimensions and weights for your order are confirmed in the quotation.
  • Outer diameters and weights are nominal factory values subject to ±5 % manufacturing tolerance per GOST 24334 / TU 3541 (КОГРЭШ).

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
AC voltage & OTDR optical test3.5 kV / 6.5 kV AC + 100 % OTDR bidirectional attenuation check100 % of drums
Screen continuity & resistanceGOST 24334 phase and pilot screen check100 % of drums
Sample tests
Bretby flexing optical Δα testAttenuation change Δα ≤ 0.05 dB/km during cyclic flexingPer production batch
Mine flame & oil resistanceGOST IEC 60332-1-2 & EN 60811-404Type approval

Inspection certificate

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

Product approvals

GOST 24334 / TU 3541ITU-T G.657A2 / ISO OM3EN 10204 3.1 + OTDR

Company certificates

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

Marking & supply

Ordering & delivery

Sheath marking

TEBAOFLEX KOGRESh (КОГРЭШ) 1140V / 3300V
Delivery form
Fumigated export wooden drums
Standard drum lengths
300 m · 500 m · 1000 m (or custom cut
MOQ
100 m (stock sizes) · 300 m (custom build)
Lead time
3–5 weeks ex-works
Incoterms
EXW, FOB, CIF, DAP

Technical documents

Downloads

PDFKOGRESh Optical-Power Composite Screened Mining Trailing Cable – technical datasheet8 sizes · construction, technical data, approvalsXLSXKOGRESh spec data (Excel)All 8 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 is the optical fibre unit protected from crushing inside KOGRESh (КОГРЭШ)?
The 4 to 12 bend-insensitive optical fibres are housed inside a flexible crush-resistant tube reinforced with non-metallic aramid yarns and an elastomeric buffer sheath, seated in a dedicated cushioned groove of the central rubber cradle with an extra-short helix pitch to prevent tensile strain.
Why are ITU-T G.657A2 single-mode fibres used instead of standard G.652D?
Longwall coal-shearer trailing cables undergo tight reverse bends inside Bretby cable handlers. ITU-T G.657A2 bend-insensitive single-mode fibres maintain negligible macro-bending optical loss down to a 7.5 mm fibre radius while remaining 100 % backward-compatible with G.652D mine transceivers. Each production drum undergoes routine dielectric voltage testing, conductor DC resistance verification, and sheath dimensional inspection before dispatch with an EN 10204 3.1 mill test certificate.
What does each letter in KOGRESh (КОГРЭШ) signify?
'К' stands for Кабель (cable), 'О' for Оптический модуль (integrated optical fibre module), 'Г' for Гибкий (flexible), 'Р' for +90 °C EPR rubber insulation, 'Э' for Экранированный (screened power and control cores), and 'Ш' for Шахтный (underground mine duty). Each production drum undergoes routine dielectric voltage testing, conductor DC resistance verification, and sheath dimensional inspection before dispatch with an EN 10204 3.1 mill test certificate.
Does every drum ship with an OTDR optical test trace?
Yes. In addition to the 3.5 kV or 6.5 kV AC dielectric test and conductor DC resistance check, 100 % of fibres in every drum are tested bidirectionally with an OTDR at 1310 nm and 1550 nm (or 850/1300 nm for OM3). Each production drum undergoes routine dielectric voltage testing, conductor DC resistance verification, and sheath dimensional inspection before dispatch with an EN 10204 3.1 mill test certificate.

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KOGRESh Optical-Power Composite Screened Mining Trailing Cable

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Reel & motion:
- Reel type: 
- Drum core diameter (mm): 
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- Travel speed (m/min): 
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- Ambient temperature: 
- Exposure (outdoor, water, oil, abrasion): 
- Destination country: 
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