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Type 245.3
Type 245.3
Semiconductive screened and flexible cable for use as longwall shearer cable. The flexible conductor allows for much reduced bending radii so this cable will tolerate bending in the cable chain (often called 'Bretby'). Cable has 3 central pilots for earth continuity monitoring and for control circuits.
Read more- Nexans ref. : MGVE28AA003BKRJ
Description
Description
Standards
-
NationalAS/NZS 1802
Semiconductive screened and flexible for use as longwall shearer cable. The flexible conductor allows for much reduced bending radii so this cable will tolerate bending in the cable chain (often called 'Bretby'). Cable has 3 central pilots for earth continuity monitoring and for control circuits.
Construction
- Heavy duty PCP sheath
- Open weave braid reinforcement
- Semiconductive PCP filling and covering
- EPR insulated and semiconductive elastomer screened power conductors
- Semiconductive PCP covered interstitial earth conductors
- SEmiconductive PCP cradle separator
- EPR insulated pilot/control conductors
Characteristics
Characteristics
Construction characteristics
Construction characteristics
Inner covering
Semiconductive PCP
Insulation
EPR
Outer sheath
Heavy duty PCP
Screen
Semiconductive Elastomer
Dimensional characteristics
Dimensional characteristics
Approximate weight
740.0 kg/100m
Conductor cross-section
95 mm²
Conductor diameter
13.9 mm
Diameter over insulation
20.7 mm
Earth Conductor - Thickness of SC PCP covering
1 mm
Earth conductor cross section
18.7 mm²
Ground Check Conductor cross-section (AWG)
-
Nominal Screen Area on each core
- mm²
Nominal insulation thickness
3.0 mm
Nominal outer sheath thickness
- mm
Nominal overall diameter
66.6 mm
Pilot Conductor Strand Size (no./mm)
28/0.25
Pilot Conductor thickness of EPR covering
0.8 mm
Sheath thickness including SC PCP layer
6 mm
Stranding (No./mm)
1332/0.30
Electrical characteristics
Electrical characteristics
A.C. Conductor resist. 50Hz and at 90 °C
0.274 Ohm/km
Charging current per phase
0.484 A/km
Conductor to screen capacitance
0.47 mF/km
DC Resistance of the Screen at 20°C
0.428 Ohm/km
Dielectric loss per phase
63.9 W/km
Inductive reactance at 50Hz
0.094 Ohm/km
Insulation resistance at 20°C
600 MOhm.km
Max. DC resistance of the conductor at 20°C
0.214 Ohm/km
Maximum electric stress
1.28 kV/mm
Rated Voltage Uo/U
3.3/3.3 kV
Voltage drop, 3 conductors
0.5 V/A.km
Zero sequence reactance at 50HZ
0.075 Ohm/km
Zero sequence resistance at 20°C
1.64 Ohm/km
Mechanical characteristics
Mechanical characteristics
Maximum Pulling Tension
5.7 kN
Usage characteristics
Usage characteristics
Minimum Bend Radius - Installed
400 mm
Minimum bending radius under free flexing
670 mm
Minimum bending radius under repeated reeling mm
800 mm
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Resources
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