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Another high-leg delta problem

G

ggunn

PE (Electrical), NABCEP certified
Location
Austin, TX, USA
Occupation
Consulting Electrical Engineer - Photovoltaic Systems
Birken Vogt said:
My shop is fed by open delta and I have large load banks in said shop. 25+50 KVA transformers. Only problem is the main panel is Zinsco braided bus and I don't want to mess with it. But it already has a 70 amp 3 phase circuit that I could connect a load bank to.

Wayne, if you want to explain in very small words how I would go about finding the phantom pot, I would love to do this test. If I can find the time.
Click to expand...
Could you maybe find it by putting a large three phase load on the service, turning everything else off, and measuring the voltage drop?
 
W

wwhitney

Senior Member
Location
Berkeley, CA
Occupation
Retired
ggunn said:
Could you maybe find it by putting a large three phase load on the service, turning everything else off, and measuring the voltage drop?
Click to expand...
Per the middle case in posts 45 and 49, if I did my math right, that wouldn't work very well.

Cheers, Wayne
 
kwired

kwired

Electron manager
Location
NE Nebraska
Occupation
EC
synchro said:
There's not a key on a standard keyboard character for it, but I'm sure Wayne meant that < would represent the angle, ( ∠ using the 2220 Unicode symbol) and the number following it would be in degrees.
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Just teasing, but he's smart enough to understand what is up in that calculation but can't figure out how to use the character map on his computer? :)
 
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