Selection procedure of Lightening Arrestor

Dear Sir,

You can provide 120 kV Lightning Arrestor for 132 kV System.

Best Wishes,

N.Suresh

very simple, Rating of LA is √2/√3(Highest system voltage) for example Highest system voltage of 132 kv generally as per code 145 kv now u calculate √2/√3(145) gives u the LA Ratings is 118.39 KV as a standard size it should be 120KV LA.