
Type 307S BS 6708 1900/3300 V Three-Core Pilot Coal Cutter Cable
Type 307S mining cable for excavating, crushing and coal-cutting equipment, with the source-defined 1900/3300 V rating and 7.5 kV; 2.5 kV pilot test reference.
- Model: Type 307S
- Conductor and insulation: flexible tinned copper with the insulation and core construction listed for this model in the supplied PDF
- Screen, pilot, earth and armour arrangement preserved from the source datasheet
- Heavy-duty chloroprene or PCP outer protection as listed for this model
- Original Type datasheet available as the product download
Send the equipment, voltage, conductor area, route, quantity and document requirements for an RFQ.
Type 307S for excavating, crushing and coal-cutting equipment
Type 307S mining cable is specified in the supplied BS 6708 datasheet for excavating, crushing and coal-cutting equipment. This page keeps the source-listed voltage, test reference, core functions and dimensional tables together so a procurement engineer can compare the requested model against the cable marking and the equipment connection. The editorial focus is the three-core pilot-unit option for 3.3 kV face equipment, not a generic promise of performance.
The supplied construction uses three copper/nylon screened phase cores, one unscreened pilot unit with three thinner cores and a bare earth conductor, laid up together under a heavy-duty chloroprene sheath. That arrangement matters because Type 307S uses an unscreened three-core pilot unit, making its control-core arrangement distinct from both Type 307 and Type 307M. The family should therefore be selected by model, core function and installation route as well as by voltage. The Gama de cables para minería y túneles provides the wider TEBAOFLEX product context.
- Elegir por: confirm the three-core pilot unit and the separate pilot test requirement before matching the cable to the machine control system.
- Confirmar antes de realizar el pedido: existing sheath marking, conductor area, cable length, route, support or handling system, terminations and the required inspection documents.
- Do not infer: values not listed in the supplied PDF, such as a different current basis, water/oil/UV performance, certification scope or mechanical interchangeability.
For a three-core pilot specification, use the BS 6708 mining cable replacement guide to check the differences between the Type 307 family variants before approving a substitute.
For a technical quotation, send the equipment nameplate or existing cable marking, voltage and size requirement, installation conditions, quantity, destination and any project-specific test or documentation requirement.
Type 307S construction
The cross-section below is the supplied construction drawing for Type 307S. The ordering decision is driven by Type 307S uses an unscreened three-core pilot unit, making its control-core arrangement distinct from both Type 307 and Type 307M.

Source-listed construction
| Elemento de construcción | Valor indicado en la fuente |
|---|---|
| Conductor | Electrolytic stranded tinned copper wire, IEC 60228 Class 5 |
| Aislamiento | EPR; earth conductor is not insulated |
| Pantalla | Tinned copper and nylon braided screen over phase cores; pilot unit is not screened |
| Pilot unit | One unscreened pilot unit with three thinner cores |
| bandeja | All cores laid up in contact with the bare copper earth conductor |
| Vaina | Heavy-duty chloroprene outer sheath |
Do not use the drawing as a substitute for the dimensional tables. Confirm the cable end preparation, screen and earth termination, armour bonding and machine interface with the equipment documentation before installation.
Type 307S applications

The supplied datasheet identifies this cable for excavating, crushing and coal-cutting equipment. Google result patterns for the BS 6708 family also separate cables by equipment duty, voltage class, core function and whether the route is armoured, screened, flat or auxiliary. That is why this page keeps the Type 307S construction separate from nearby Type numbers.
- Primary duty: excavating, crushing and coal-cutting equipment.
- Model boundary: Type 307S uses an unscreened three-core pilot unit, making its control-core arrangement distinct from both Type 307 and Type 307M.
- Project check: match the cable marking, core map, voltage, termination, route geometry and handling method to the machine drawing.
- Environmental review: confirm the actual mine/quarry conditions and any authority, inspection or documentation requirements; do not infer a certification or material-resistance claim from the model number.
For a single unscreened pilot construction, the Type 307 coal cutter cable is the adjacent reference; pilot function must be confirmed from the cable schedule.
The cable should be released only after the equipment route, required length, conductor area, core functions and connection details are agreed. If the intended duty is different from the source-listed application, request an engineering review through the quotation process.
Type 307S specifications
The summary below identifies the supplied model family. The source-transcribed tables that follow retain the PDF's dimensional, electrical and construction values, including available sizes, resistance, current, diameter, mass, bending or pulling data when the PDF provides them.
| Selection item | Source-linked value |
|---|---|
| Modelo | Type 307S |
| Tensión nominal | 1900/3300 V |
| Voltaje de prueba | 7.5 kV; 2.5 kV pilot |
| Aplicación | excavating, crushing and coal-cutting equipment |
| Norma del producto | BS 6708 |
Complete source-transcribed technical tables
Source PDF: BS6708_TYPE_307S_1900_3300V_POWER_SUPPLY_CABLE_datasheet.pdf; 3 pages; 4 extracted tables. Values are not recalculated or replaced by third-party values.
| Parámetro | Valor |
|---|---|
| Conductor | Electrolytic, stranded, tinned copper wire, IEC 60228 Class 5 |
| Aislamiento | EPR; the earth conductor is not insulated |
| Separador | Colored textile tape for core identification |
| Pantalla | Tinned copper and nylon braided screen over phase cores; pilot core is not screened |
| bandeja | All cores laid up in contact with the bare copper earth conductor |
| Lecho | Rubber based bedding compound |
| Vaina exterior | Heavy duty chloroprene outer sheath |
| Parámetro | Valor |
|---|---|
| Estándar | BS 6708 |
| Tensión nominal | 1900/3300 V |
| Voltaje de prueba | 7.5 kV; 2.5 kV for pilot conductors |
| Disposición central | Three screened phase cores, one unscreened pilot unit with three thinner cores and a bare copper earth conductor |
| CABLE DIMENSIONS | ||||
|---|---|---|---|---|
| Parámetro | 3x50 +35+3x4 | 3x70 +50+3x6 | 3x95 +50+3x6 | 3x120 +70+3x10 |
| Phase conductor cross section mm2 | 3x50 | 3x70 | 3x95 | 3x120 |
| Phase conductor stranding | 396/0.40 | 360/0.50 | 475/0.50 | 608/0.50 |
| Phase conductor diameter nominal mm | 9.40 | 11.35 | 12.75 | 15.10 |
| Phase insulation diameter nominal mm | 15.80 | 17.80 | 19.20 | 21.60 |
| Phase screen diameter mm | 18.20 | 20.15 | 21.60 | 23.95 |
| Earth conductor cross section mm2 | 1x35 | 1x50 | 1x50 | 1x70 |
| Earth conductor stranding | 276/0.40 | 396/0.40 | 396/0.40 | 360/0.50 |
| Earth conductor diameter nominal mm | 8.20 | 9.80 | 9.80 | 11.70 |
| Pilot conductors cross section mm2 | 3x4 | 3x6 | 3x6 | 3x10 |
| Pilot conductors stranding | 56/0.30 | 84/0.30 | 84/0.30 | 80/0.40 |
| Pilot conductor diameter nominal mm | 2.60 | 3.50 | 3.50 | 4.40 |
| Pilot insulation diameter nominal mm | 5.55 | 6.40 | 6.40 | 7.30 |
| Diameter over sheath nominal mm | 17.80 | 19.80 | 21.20 | 23.60 |
| Minimum overall diameter mm | 56.8 | 62.8 | 68.9 | 73.4 |
| Maximum overall diameter mm | 59.8 | 65.8 | 72.7 | 77.2 |
| Minimum bending radius mm | 478 | 526 | 581 | 617 |
| Maximum pulling tension kgf | 1200 | 1680 | 2000 | 2000 |
| Approximate cable weight kg/km | 5850 | 7150 | 8600 | 10500 |
| Copper weight kg/km | 2685 | 3319 | 4039 | 4951 |
| ELECTRICAL DETAILS | ||||
|---|---|---|---|---|
| Parámetro | 3x50 +35+3x4 | 3x70 +50+3x6 | 3x95 +50+3x6 | 3x120 +70+3x10 |
| Continuous current rating at 25 deg C ambient A | 170 | 205 | 250 | 295 |
| Intermittent current rating at 25 deg C ambient A | 210 | 255 | 315 | 360 |
| Phase conductor DC resistance at 20 deg C ohm/km | 0.393 | 0.277 | 0.210 | 0.164 |
| Pilot conductor DC resistance at 20 deg C ohm/km | 5.09 | 3.39 | 3.39 | 1.95 |
| Three screens and earth in parallel DC resistance ohm/km | 0.35 | 0.35 | 0.28 | 0.28 |
| Nominal reactance at 50 Hz ohm/km | 0.113 | 0.108 | 0.105 | 0.101 |
| Nominal reactance at 60 Hz ohm/km | 0.136 | 0.129 | 0.126 | 0.121 |
| Minimum insulation resistance at 20 deg C MOhm/km | 950 | 820 | 720 | 660 |
| 3 phase voltage drop at full load mV/A/m | 0.85 | 0.61 | 0.48 | 0.39 |
Use the table values with the equipment drawing and approved termination plan. If the requested conductor area, current basis, mechanical limit or environmental condition is not listed in the supplied PDF, treat it as a quotation-stage confirmation item.
Type 307S standards and references
| Tema | Source-linked reference |
|---|---|
| Norma del producto | BS 6708 |
| Tensión nominal | 1900/3300 V |
| Voltaje de prueba | 7.5 kV; 2.5 kV pilot |
| Source application | excavating, crushing and coal-cutting equipment |
The product page preserves the BS 6708 reference appearing in the supplied PDF. The BSI record currently identifies BS 6708:1998 as withdrawn on 22 May 2026; this status note is a standards-reference update, not a claim that the product is currently certified or approved. See the official BSI BS 6708 scope record for the published status.
For an RFQ, state the required standard documents, inspection scope, test report, cable marking, destination rules and any replacement-equivalence requirement. The model number alone does not establish legal installation compliance.
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Indique los servicios requeridos, la longitud del cable, la carga mecánica, el entorno, el tipo de terminación y la cantidad. Nuestro equipo revisará la solicitud antes de elaborar un presupuesto.
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