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BS 6708 TYPE 307

APPLICATION

Used for supplying excavating, crushing machines and equipment.

Certificates
Technical Information

CONDUCTOR : Electrolytic, stranded, tinned copper wire IEC 60228 Class 5
INSULATION : EPR (Ground core is not insulated).
SEPERATOR : Colored Textile tape for core identification.
SCREEN : Tinned copper / Nylon braided screen over phase cores. Pilot core is not screened.
LAYUP : All cores are laid up in contact with the bare copper earth conductor.
BEDDING : Rubber based bedding compound.
OUTER SHEATH : Heavy duty chloroprene outer sheath.

RELATED STANDARDS : BS 6708
RATED VOLTAGE : 1,9/3,3 kV
TEST VOLTAGE : 7,5 kV

Cross Section 3×25+25+16 3×35+25+16 3×50+35+25 3×70+50+35 3×95+50+50 3×120+70+70 3×150+70+95
Phase Conductor
Number and cross section mm2 3×25 3×35 3×50 3×70 3×95 3×120 3×150
Insulation diameter Nom. mm 13.10 14.70 15.70 17.70 19.10 21.40 23.00
Screen diameter Nom. mm 15.50 17.10 17.70 19.70 21.10 23.40 25.00
Earth Conductor
Number and cross section mm2 1×25 1×25 1×35 1×50 1×50 1×70 1×95
Stranding mm 196/0,40 196/0,40 276/0,40 396/0,40 396/0,40 360/0,50 475/0,50
Conductor diameter Nom. mm 7.00 7.00 8.50 10.00 10.00 11.70 13.50
Pilot Conductor
Number and cross section mm2 1×16 1×16 1×25 1×35 1×50 1×70 1×95
Stranding mm 126/0,40 126/0,40 196/0,40 276/0,40 396/0,40 360/0,50 475/0,50
Conductor diameter Nom. mm 5.50 5.50 7.00 8.50 10.00 11.70 1.35
Insulation diameter Nom. mm 11.60 11.60 13.10 14.70 15.70 17.70 19.10
Cable details
Min. overall diameter mm 47.4 51.6 56.8 62.8 68.9 73.4 75.9
Max. overall diameter mm 49.9 54.6 59.8 65.8 72.7 77.2 79.7
Min. bending radius mm 400 440 480 525 580 615 640
Max. pulling tension kgf 640 830 1.2 1.68 2 2 2
Appx. cable weight kg/km 4 4.8 6.15 7.6 9.25 11.2 13
Copper weight kg/km 1.654 1.948 2.666 3.482 4.346 5.45 6
Electrical details
Continuous current
rating at 25°C Ambient
A 110 135 170 205 250 295 320
Intermittent current
rating at 25°C Ambient
A 130 155 210 255 315 360 385
Max. DC resistance at 20°C
Phase Conductor Ω /km 0.795 0.565 0.393 0.277 0.21 0.164 0.132
Pilot Conductor Ω /km 1.24 1.24 0.795 0.565 0.393 0.277 0.21
3 screens and earth in parallel connection Ω /km 0.5 0.5 0.35 0.35 0.28 0.28 0.14
Nom. reactance at 50Hz Ω /km 0.125 0.117 0.113 0.108 0.105 0.101 0.098
Nom. reactance at 60Hz Ω /km 0.15 0.141 0.136 0.129 0.126 0.121 0.118
Min. insulation
resistance at 20°C
M Ω /km 1250 1100 950 820 720 660 600
3 phase voltage drop on full load current mV/A/m 1.69 1.21 0.85 0.61 0.48 0.39 0.32

 

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