Hello fellow engineers from India
Can any one shar with me a copy of the standard CEIG rules (Chief Electrical Inspector to Goverment) - as applicable in INdia. I want to know in particular the following details
1) Upto what ampere or kVA rating of transformer or DG can I use LT cables on the 415 volts secondary side and beyond which should I use the bus ducts? (i find that there is some inconsistency betwen the rules followed in the state of Tamil Nadu and that in Andhrapradesh.
2) How do i calculate the MCOV of lightning arrestor for 11 kV application. My HT 11 kV is only three phase line ending up with the primary terminals of my trasnformer in delta connection. Should I refer my HT line as "solidly earthed system" or "unearther system". I do not know whether my incoming line from Electricity Board is earthed or unearthed. I have only three HT over head lines coming into my 11 kV dopuble pole structure. Then how do I specify my LA and how do i calculate my MCOV for the LA?
Advanced thanks for all the reply posts