Of a overhead distribution line, I have the Three Phase Geometrical Mean Spacing which is 58.371 Inches and Line to Neutral Spacing 48 Inches. Also have the sequence components.
Is there any way to find the Phase to Phase distance?
Thank you Mr.IFRs but I Don't have the access to real world(the area where work is going) ... So i cant know the real length. So it is not possible for me to compare the.
i have a DWG formated(autocad file) map of an area but in the map the scaling isn't mentioned .To work with an area map real scaling is very important. How can i find the real scaling of the map ?
As far i know for a protection relay,
Pick up current (Min Trip Current) = CT ratio × PSM (plug setting)
According to this formula,For below information i got 68A pick up current. Is this correct?
Thank you Mr.ScottyUK , your programme works perfectly .
Few days ago i also discussed with a senior engr. , He gave me a programme developed by copper .
With that programme they made that excel sheet
@scottyUK
with your equation , I have already tried to manipulate required data.But the data doesn't match with the excel file data . That’s why I become confused
I was trying to draw TCC curve of some relays. While going through my office's old files, i found a excel file where previous employees (10-15 years ago) draw TCC curves of some relays . I couldn't figure out how they have manipulated required data.
Here is the file that i found . Relay...
for co-ordination study i have to draw the TCC curve of a relay , I have the specification of the relay i have attached the specification .
Can any one give me any idea (or resource to study ) how can i draw the time vs current curve for this relay ?
