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BS 6708 TYPE 307M

BS6708TYPE307M Mining Certficated Cables

Certificates :

APPLICATION

Used for supplying excavating, crushing machines
and equipment.

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 and pilot cores.
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+253×35+25+353×50+35+503×70+50+703×95+50+953×120+70+120
Phase Conductor
Number and cross sectionmm23×253×353×503×703×953×120
Strandingmm196/0,40276/0,40396/0,40360/0,50475/0,50608/0,50
Conductor diameterNom. mm6.758.359.4011.3512.7515.10
Insulation diameterNom. mm13.1014.7515.8017.8019.2021.60
Screen diameterNom. mm15.5017.1018.2020.1521.6023.95
Earth Conductor
Number and cross sectionmm21×251×251×351×501×501×70
Strandingmm196/0,40196/0,40276/0,40396/0,40396/0,40360/0,50
Conductor diameterNom. mm6.756.758.209.809.8011.70
Pilot Conductor
Number and cross sectionmm21×251×351×501×701×951×120
Strandingmm196/0,40276/0,40396/0,40360/0,50475/0,50608/0,50
Conductor diameterNom. mm6.758.359.4011.3512.7515.10
Insulation diameterNom. mm13.1014.7515.8017.8019.2021.60
Screen diameterNom. mm15.5017.1018.2020.1521.6023.95
Cable details
Min. overall diametermm47.451.656.862.868.973.4
Max. overall diametermm49.954.659.865.872.777.4
Min. bending radiusmm399437478526581617
Max. pulling tensionkgf6428341.21.6822
Appx. cable weightkg/km4.256.58.19.811.6
Copper weightkg/km1.6642.0482.8663.6824.5465.65
Electrical details
“Continuous current
rating at 25°C Ambient”
A110135170205250295
“Intermittent current
rating at 25°C Ambient”
A130155210255315360
Max. DC resistance at 20°C
Phase ConductorΩ /km0.7950.5650.3930.2770.210.164
Pilot ConductorΩ /km0.7950.5650.3930.2770.210.164
4 screens and earth in
parallel connection
Ω /km0.450.450.310.310.250.25
Nom. reactance at 50HzΩ /km0.1250.1170.1130.1080.1050.101
Nom. reactance at 60HzΩ /km0.150.1410.1360.1290.1260.121
Min. insulation
resistance at 20°C
M Ω /km12501100950820720660
3 phase voltage drop on full load currentmV/A/m1.691.210.850.610.480.39
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