Permissible Minimum Distance Between Adjacent 132 KV Double Ckt. Transmission

Its safety that matters . Please check the link below http://electricalnotes.wordpress.com/2011/04/22/minimum-electrical-clearance-2/

Hello folks,

132 kV Ground-fault voltage is 83/84 kV

Safety distance for a man is ground fault distance + man-security (90 cm) = 84+90 = 174 cm

You say 250cm between last conductor and ground (corner column...and so on)

You have enough distance. If you want to secure more your men, erect a wire netting with steel poles at a width of 1 meter between each pole and connect them to the ground (each one of them) Use welding instead of bonding between netting and poles.

Erect up to 174 cm of the line in covering all the site, relied firmly to ground circuit.

People will be obliged to work under the covering net of steel wires and be protected, including in case of lightning. Ground covering must overshoot all electrical parts of 174 cm. in order to execute the covering efficiently, the O/H lines must be tripped during its erection (2 to 3 hours only) in order to avoid frightening from the erection men and grounding sticks must rely all OHL conductors to the ground circuit, in order to avoid further mistakes with energy running.

I hope to have not forgotten something!

BRZK

So, you don't have standards for electrical installations?

So,you do not want to give a thought to find a solution. it is easy to make such replies in the forum. Anyway,thanks for the response.

...so while it is possible for the building itself to be this close, there is no scope for the people building it to survive without being vaporised at those distances.

Something, somewhere, has to change.

One wonders how the local Planning Authority has sanctioned the creation of a building at such a small distance from an overhead line. How ridiculous!

Thank you for your concern & response.Please go through the third para of the original post and respond if possible.

NESC-C2/2007

Table 234C b: Horizontal clearances under wind displacement conditions

Open supply conductors, over 750 V to 22 kV=1.4 m

Rule 234G:

Additional clearances for voltages exceeding 22 kV for wires, conductors, cables, and unguarded

rigid live parts of equipment

Greater clearances than specified in Rules 234B, 234C, 234D, 234E, 234F, and 234J shall be provided where required as follows:[132/sqrt(3)=76.2 KV to Ground] 10 mm for each 1 KV :

(76.2-22)*10=542 mm Total: =1.4+0.542=1.942 m.

Rule 234H: If you know the switching-surge factor, you may reduce this distance.