edl
Aluminum
- Joined
- Apr 8, 2008
- Location
- Southeast USA
Hello - we are in a new space from the 1970s that has "high leg delta" service described here
High-leg delta - Wikipedia
basically A phase is 120, B phase is 208 and C phase is 120
I promptly plugged a 3 phase baldor carbide grinder in and burned it up
I followed the instructions for wiring the 9 motor leads / l1, l2, l3 for "low voltage" 3 phase (208 - 240)
as i think about it, how would a 3 phase motor know that one leg is a "high leg"?
if it can't know, what is the normal practice on these older systems to wire 3 phase? - do you have to step down B phase prior to wiring each machine?? that seems like it could not have been how they designed it back in the day....?
appreciate any insights....
High-leg delta - Wikipedia
basically A phase is 120, B phase is 208 and C phase is 120
I promptly plugged a 3 phase baldor carbide grinder in and burned it up
I followed the instructions for wiring the 9 motor leads / l1, l2, l3 for "low voltage" 3 phase (208 - 240)
as i think about it, how would a 3 phase motor know that one leg is a "high leg"?
if it can't know, what is the normal practice on these older systems to wire 3 phase? - do you have to step down B phase prior to wiring each machine?? that seems like it could not have been how they designed it back in the day....?
appreciate any insights....