Power cables supports/clamps
Power cables supports/clamps
(OP)
Hello,
I'm after some information on the effects of fault currents on conductors and their supports, can't find any formula to define max distance between two cable ties/clamps on HV/LV power cables to withstand the fault current.
I'm after some information on the effects of fault currents on conductors and their supports, can't find any formula to define max distance between two cable ties/clamps on HV/LV power cables to withstand the fault current.






RE: Power cables supports/clamps
Ft = (0.17 x IPEAK2) / S
Where:
Ft= Maximum Force on Conductor (N/m)
IPEAK = 1st Cycle Peak Asymmetrical Short Circuit Current (kA)
S= Spacing between Conductor centers (meters)
The force on one tie will be Ft*lng where lng = distance [along] between two ties[m].
This formula gives the static load instantaneously created by the short circuit, however the phase changes of the alternating current mean that the forces on the cable and their direction are changing continuously.
RE: Power cables supports/clamps
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