nitin36537
Civil/Environmental
- Feb 16, 2001
- 60
For calculating phase to phase vertical clearance between conductors we use following formula
cls = 0.75 * sqrt(max sag + insulator length)+ V/150
For 400 KV line this value is about 7.0m , however Indian code require this to be 8.0 m
For 400KV lines we provide 9.0 m as mid span clearance between earthwire and conductor but no such formula is there. How to calculate this value if specification do not provide any value for design?
OR Does any code provide any formula to calculate require mid span clearance between earthwire and conductor ??
Mid span clearance requirement depends on what factors?
Thanks
Nitin patel
cls = 0.75 * sqrt(max sag + insulator length)+ V/150
For 400 KV line this value is about 7.0m , however Indian code require this to be 8.0 m
For 400KV lines we provide 9.0 m as mid span clearance between earthwire and conductor but no such formula is there. How to calculate this value if specification do not provide any value for design?
OR Does any code provide any formula to calculate require mid span clearance between earthwire and conductor ??
Mid span clearance requirement depends on what factors?
Thanks
Nitin patel