As the other posts say, it all depends what equipment is actually located within the room. Also what type of clean room? Bio-tech process or semi-conductor manufacturing type construction? What information are you specifically looking for? For pharma/biotech we generally use stainless steel...
Interestingly the local utility says to calculate the SLG X/R from the following equation:
SLG X/R = {(2*x1/r1)+x0/r0}/3
When I use this I get 7.93 vice 6.67 from utilizing the vectors. It must use assumptions to come up with the formula.
Okay, I understand what I did wrong. I didn't think the vector addition though for Zt=Z0+Z1+Z2. From the information I had I could calculate Z1 with angle, Z0 angle only, and magnitude of Zt.
I drew it out like you did and through wiki found the formula I needed to solve the triangle with...
I've searched through the forum and found some close examples but for some reason my values are not coming out. Here is what is provided by the utility:
Primary Voltage = 24kV P to P
Fault Current LLL = 4863
Fault Current LG = 4364
X1/R1 = 9.62
X0/R0 = 4.56
My end goal is to develop the...
