Answer Posted / geetha

For 415 V :Ph-Ph-25 mm
Ph-E -20 mm

For 6.6 KV:Ph-Ph-90 mm
Ph-E -70 mm

for 11 KV : Ph-Ph-229mm
Ph-E-178 mm

for 11 KV : Ph-Ph-229mm
Ph-E- 178mm

for 33 KV : Ph-Ph-320mm
Ph-E-320mm

for 132 KV : Ph-Ph-1100mm if Lightning impulse = 550
Ph-E- 1100mm

Ph-Ph-1300mm if Lightning impulse = 650
Ph-E- 1300mm


for 220 KV : Ph-Ph-1900mm if Lightning impulse = 950
Ph-E-1900 mm

Ph-Ph-2100mm if Lightning impulse = 1050
Ph-E-2100 mm

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