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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 Section3×25+25+163×35+25+163×50+35+253×70+50+353×95+50+503×120+70+703×150+70+95
Phase Conductor
Number and cross sectionmm23×253×353×503×703×953×1203×150
Insulation diameterNom. mm13.1014.7015.7017.7019.1021.4023.00
Screen diameterNom. mm15.5017.1017.7019.7021.1023.4025.00
Earth Conductor
Number and cross sectionmm21×251×251×351×501×501×701×95
Strandingmm196/0,40196/0,40276/0,40396/0,40396/0,40360/0,50475/0,50
Conductor diameterNom. mm7.007.008.5010.0010.0011.7013.50
Pilot Conductor
Number and cross sectionmm21×161×161×251×351×501×701×95
Strandingmm126/0,40126/0,40196/0,40276/0,40396/0,40360/0,50475/0,50
Conductor diameterNom. mm5.505.507.008.5010.0011.701.35
Insulation diameterNom. mm11.6011.6013.1014.7015.7017.7019.10
Cable details
Min. overall diametermm47.451.656.862.868.973.475.9
Max. overall diametermm49.954.659.865.872.777.279.7
Min. bending radiusmm400440480525580615640
Max. pulling tensionkgf6408301.21.68222
Appx. cable weightkg/km44.86.157.69.2511.213
Copper weightkg/km1.6541.9482.6663.4824.3465.456
Electrical details
Continuous current
rating at 25°C Ambient
A110135170205250295320
Intermittent current
rating at 25°C Ambient
A130155210255315360385
Max. DC resistance at 20°C
Phase ConductorΩ /km0.7950.5650.3930.2770.210.1640.132
Pilot ConductorΩ /km1.241.240.7950.5650.3930.2770.21
3 screens and earth in parallel connectionΩ /km0.50.50.350.350.280.280.14
Nom. reactance at 50HzΩ /km0.1250.1170.1130.1080.1050.1010.098
Nom. reactance at 60HzΩ /km0.150.1410.1360.1290.1260.1210.118
Min. insulation
resistance at 20°C
M Ω /km12501100950820720660600
3 phase voltage drop on full load currentmV/A/m1.691.210.850.610.480.390.32

 

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