High Voltage Shield Cable (HVSC) Insulated Down Conductor 50mm2 for Lightning Protection
High Voltage Shielded Cable(HVSC) is a high integrity low impedance cable which is designed to convey lighting engergy to ground with minimal risk of "side flashing" or structure electrification. The need to reduce "side flashing" and structure electrification protects both personnel and sensitive electronic equipment from the devastating risks of a lightning strike.
The design of the HVSC incorporates carefully selected dielectric components to ensure optimum performance under high impulse condictions , this design provides a low inductance per unit length with low surge impedance. Upon the injection of lightning current through the HVSC , the voltage rise in comparison to a standard conventional down conductor such as flat copper tape is reduced by a factor of between 25 and 30.
The HVSC provides flexible installations options,whereby the cable can be installed internal to the building through air ducts,electrical cable risers, or external to the building.
HVSC Configuration:7 Layer cable consisting of the following.
Inner Binding Tape
Outer Binding Tape
Concentric Condcutor:Nominal cross sectional area 50mm2
Overall Diameter(Approx) 37mm
Weight of Cable:2.050kg per metre
DC Resistance of conductor at 20ºC(Max) Ohm/km 0.387
DC Resistance of screen at 20ºC(Max) Ohm/km 0.448
Insulation resistance at 20ºC(Min) M Ohm-km 7.15
Thermal Short circuit current(1second) KA 7.15
TECHNICAL PARAMETER OF HVSC POWER CABLE
|Material||—||Non-conducting Black PVC rod|
|Copper wire numbers and diameter||nos/mm||34/1.37|
|3||Wrapping tape||Polyester tape|
|Nominal thickness of insulation||mm||5.5|
|Copper wire numbers and diameter||nos/mm||50/1.0|
|6||Wrapping tape||Polyester tape|
|Material of outer sheath||—||Black PVC|
|Nominal thickness of outer sheath||mm||3.0|
|Approx. Dia. Over outer sheath||mm||37.0|
|8||Approx. weight of cable||Kg/km||1990|
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